Gas pressure regulating valve

Abstract

The utility model relates to the technical field of fluid pressure executing mechanisms, in particular to a gas pressure regulating valve which comprises a valve body, a valve element located in the valve body and a valve cover covering the valve body. The valve element comprises an upper valve element body and a lower valve element body which are rotationally connected with each other, the upper valve element body is hemispherical, a plurality of air holes are evenly distributed in the hemispherical face of the upper valve element body, an upper sealing plate is fixed to the bottom face of the upper valve element body, the lower valve element body is in a bent pipe shape, and a lower sealing plate is arranged at the position, connected with the upper valve element body, of the lower valve element body. The upper sealing plate and the lower sealing plate are respectively provided with a fan-shaped opening, the edge of the fan-shaped opening of the upper sealing plate is provided with a downward bulge, the lower sealing plate is provided with an arc-shaped sinking groove, the fan-shaped opening of the lower sealing plate is arranged at the bottom of the sinking groove, and the bulge is inserted into the sinking groove. According to the utility model, the gas pressure can be accurately controlled, more stable gas pressure output can be realized, the gas pressure adjustment is smoother and more controllable, the sealing performance can be ensured, the pipeline fatigue damage and pipeline fracture risk can be reduced, and the service life of the pipeline can be prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fluid pressure executing mechanism, concretely is gas pressure regulating valve. BACKGROUND

[0002] Gas pressure regulating valve is a common gas pressure control device, it realizes stable control to gas pressure through adjusting the opening size of gas flowing through pipeline. Its basic principle is to control the flow and pressure of gas by the gap between valve core and valve seat, when gas flows through the gap between valve core and valve seat, the position of valve core determines the flow and pressure of gas, thereby realizing the adjustment and stable control of gas pressure.

[0003] At present, the structure of conventional gas pressure regulating valve usually adopts spring to control the opening of valve, according to the requirement of set pressure, the opening of valve is finely adjusted, when the actual gas pressure is lower than set pressure, the opening of pipeline controlled by regulating valve becomes larger to allow more gas to pass, the flow rate of gas increases, so that the gas pressure rises, and when the gas pressure is higher than set pressure, the opening of pipeline controlled by regulating valve decreases to reduce the amount of gas passing, the flow rate of gas decreases, so that the gas pressure decreases. For example, the prior art "a dual-purpose regulating valve" (publication number: CN212028666U) discloses a regulating valve structure, after gas enters from the gas inlet, the diaphragm pressure in the valve increases and rises upwards, thereby compressing the spring, and driving the control block and valve rod to swing, so that the valve head at the other end of the valve rod blocks the gas inlet, at this time, gas cannot enter the gas cavity of the valve body, and the gas in the gas cavity can be discharged from the gas outlet, so that the purpose of reducing the gas pressure is achieved, and when the pressure decreases to a certain extent, the spring itself rebounds to drive the control block and valve rod to swing in the opposite direction, so that the valve head at the other end of the valve rod is separated from the gas inlet, so that gas can enter the gas cavity through the gas inlet, thereby increasing the gas pressure, so as to achieve the purpose of regulating the gas pressure.

[0004] However, this valve structure still has the following technical problems:

[0005] 1. Poor pressure regulating stability. The gas inlet of the prior art is closed and opened by the valve head, after the gas flows into the gas cavity from the gas inlet, it flows out from the gas cavity to the gas outlet, and when the valve is just opened, the gas will quickly flow into the gas cavity, causing the gas pressure to change suddenly, and the instantaneous high pressure will cause strong impact on the pipeline, the pipeline vibration increases, which may cause fatigue damage of the pipeline, reduce the service life of the pipeline, and even cause the pipeline to break.

[0006] 2. Poor sealing. The valve head in the prior art directly covers the gas inlet to achieve plugging, and the bottom surface of the valve head and the upper surface of the gas inlet are prone to gaps, making it difficult to form a good sealing surface, thereby causing gas leakage. Moreover, the valve rod is rod-shaped, and is prone to deformation during long-term use, causing the valve head at the end of the valve rod to be warped and deformed, thereby failing to achieve plugging of the gas inlet and causing sealing failure.

[0007] 3. Poor pressure control accuracy. The prior art adopts valve head plugging or separation from the gas inlet, and then allows the gas in the gas cavity to flow out naturally to achieve pressure reduction. However, this natural flow-out mode relies on the pressure difference in the gas cavity and the natural diffusion of the gas, and the pressure reduction speed is difficult to accurately control. In some emergency situations requiring rapid pressure reduction, the required pressure reduction effect cannot be achieved in time. Technical content of the utility model

[0008] The utility model provides a gas pressure regulating valve, which can solve the problem of poor valve pressure regulating stability in the prior art, which easily causes sudden change of pipeline pressure, causes fatigue damage of the pipeline due to long-term impact of high pressure, reduces the service life of the pipeline, and even causes pipeline rupture.

[0009] The utility model provides the following technical scheme: a gas pressure regulating valve, comprising a valve body, a valve core located in the valve body, and a valve cover covering the valve body;

[0010] The valve core comprises an upper valve core and a lower valve core which are rotationally connected to each other, the upper valve core is semispherical, a plurality of gas holes are uniformly distributed on the semispherical surface of the upper valve core, and an upper sealing plate is fixed to the bottom surface of the upper valve core; the lower valve core is in the shape of an elbow pipe, and a lower sealing plate is arranged at the position where the lower valve core is connected to the upper valve core.

[0011] The upper sealing plate and the lower sealing plate are both provided with a fan-shaped opening, the edge of the fan-shaped opening of the upper sealing plate is provided with a downward protrusion, an arc-shaped groove is formed in the lower sealing plate, and the fan-shaped opening of the lower sealing plate is arranged at the bottom of the groove, and the protrusion is inserted into the groove.

[0012] Advantages:

[0013] 1. Stable pressure regulation. The plurality of gas holes uniformly arranged on the upper valve core, after the gas enters the upper valve core from the fan-shaped opening of the lower valve core, will first pass through the plurality of gas holes of the upper valve core, and the plurality of uniformly distributed gas holes can make the gas more uniformly dispersed before entering the cavity in the valve body, and then flow out from the outlet of the valve body. The uniformly distributed gas holes reduce the turbulence and pressure fluctuation when the gas rushes in, avoid high-speed impact of the gas on the pipeline at a single point, help to achieve more stable gas pressure output, make the gas pressure regulation in the pipeline more smooth and controllable, eliminate noise, reduce vibration, avoid fatigue damage and rupture risk of the pipeline, and prolong the service life of the pipeline.

[0014] 2、Response speed block, pressure control precision is high, adjustment range is wide. Through the relative rotation of the upper valve core and the lower valve core, the fan-shaped openings on the upper sealing plate and the lower sealing plate can be overlapped or staggered, thereby quickly realizing the on-off of the gas passage, and the gas supply can be cut off or connected according to the needs in a short time. The angle of the staggered fan-shaped openings corresponds to the degree of coincidence of the fan-shaped openings, thereby realizing accurate adjustment of the valve opening and linear regulation of the flow, effectively improving the gas pressure and flow control precision, and the gas flow can be adjusted in a larger range to adapt to the pressure adjustment needs of different environments.

[0015] 3、Improve the sealing performance. The lower sealing plate is provided with an arc-shaped sink, and the edge of the fan-shaped opening of the upper sealing plate is provided with a downward protrusion. The protrusion can be inserted into the sink. When the upper sealing plate and the lower sealing plate are relatively rotated, on the one hand, the sink guides the protrusion, and on the other hand, when the fan-shaped openings of the upper sealing plate and the lower sealing plate are staggered, the outer wall of the protrusion and the inner wall of the sink form a sealing surface. Compared with the plugging mode of covering the gas inlet by the valve head in the prior art or the structure of traditional ball valves and butterfly valves, the sealing surface of the present scheme is larger and the sealing effect is more airtight. After the fan-shaped openings of the upper sealing plate and the lower sealing plate are staggered, the distance is farther apart, and the gas is less likely to leak. The sealing reliability and safety of the pressure regulating valve can be effectively improved.

[0016] Further, the fan-shaped openings of the upper sealing plate and the lower sealing plate are one-fourth of the upper sealing plate or the lower sealing plate.

[0017] Beneficial effects: When the fan-shaped opening is one-fourth, the relative rotation angle of the upper sealing plate and the lower sealing plate has a linear relationship with the opening coincidence area. When the rotation angle changes from 0° to 90°, the fan-shaped opening area uniformly changes from 0% to 100%. This facilitates intuitive control of flow or pressure through angle, and also helps to improve the accurate control of flow and pressure. At the same time, the one-fourth fan-shaped opening provides a relatively moderate range of gas flow area change, which neither leads to insufficient flow due to too small opening nor makes it difficult to accurately control the flow due to too large opening. In addition, the design of one-fourth fan-shaped opening does not require complex machining process and special mold in manufacturing, thereby reducing the production difficulty and cost.

[0018] Further, the bottom center of the upper sealing plate protrudes a cylinder downward, and the upper surface center of the lower sealing plate is provided with a recessed circular groove, and the cylinder is rotationally connected in the circular groove.

[0019] Beneficial effects: The cooperation of the cylinder and the circular groove provides an accurate positioning reference for the relative rotation of the upper and lower sealing plates. During rotation, the upper sealing plate can stably rotate around the axis of the cylinder, ensuring that the fan-shaped openings of the upper and lower sealing plates can be accurately aligned or staggered, thereby realizing accurate control of gas flow and pressure, and helping to improve the adjustment accuracy and stability of the pressure regulating valve.

[0020] Furthermore, a hydraulic actuator is fixed above the valve body, and the valve cover covers the outside of the hydraulic actuator. The hydraulic actuator is used to drive the upper valve core to rotate.

[0021] Beneficial effects: Hydraulic actuators utilize hydraulic systems to generate power, enabling them to output significant torque and powerfully drive the upper valve core to rotate. This ensures the upper valve core rotates quickly and stably into position, effectively regulating gas flow and pressure. Simultaneously, the hydraulic system allows for precise pressure and flow control, enabling the hydraulic actuator to accurately control the rotation angle of the upper valve core, thus improving the adjustment accuracy of the pressure regulating valve. Furthermore, the relatively fast response speed of hydraulic actuators allows them to quickly react to control signals, promptly driving the upper valve core to rotate and adjust the gas flow rate or on / off state, ensuring system stability and reliability.

[0022] Furthermore, a gear shaft is fixed to the top of the upper valve core, and a connecting sleeve is fixed to the gear shaft. The upper end of the connecting sleeve is fixedly connected to the bottom of the hydraulic actuator.

[0023] Beneficial effects: The gear shaft is fixed at the top of the upper valve core, and the connecting sleeve is fixed on the gear shaft and connected to the bottom of the hydraulic actuator, forming a stable power transmission path. The power generated by the hydraulic actuator can be accurately and stably transmitted to the gear shaft through the connecting sleeve, thereby driving the upper valve core to rotate. This ensures the reliability of power transmission during pressure regulation and prevents slippage, loosening, or other situations that affect power transmission, ensuring that the pressure regulating valve can work normally.

[0024] Furthermore, the connecting sleeve has a gear groove at its center, and the gear shaft is inserted into the gear groove.

[0025] Beneficial effects: The meshing of the gear slot and gear shaft enables precise power transmission. When the hydraulic actuator drives the gear shaft to rotate via the connecting sleeve, the precision of the gear transmission ensures that the upper valve core rotates at the expected angle and speed, guaranteeing accurate regulation of gas flow and pressure by the pressure regulating valve and preventing slippage or idling during power transmission. Simultaneously, the engagement of the gear slot and gear shaft enhances connection stability, maintaining a stable rotation of the upper valve core, reducing adjustment errors caused by loose connections, and improving the reliability of the pressure regulating valve. Attached Figure Description

[0026] Figure 1 This is an isometric view of the structure of this utility model.

[0027] Figure 2 This is a half-sectional view of the present invention.

[0028] Figure 3 for Figure 2 Axonometric view.

[0029] Figure 4 for Figure 3 Axonometric view of the upper valve core.

[0030] Figure 5 for Figure 3 Axonometric view of the lower valve core.

[0031] Figure 6 for Figure 3 Axonometric view of a hydraulic actuator. Detailed Implementation

[0032] The following detailed description illustrates the specific implementation method:

[0033] The markings in the accompanying drawings include: valve cover 1, valve body 2, lower valve core 3, inlet 301, outlet 4, lower sealing plate 5, settling groove 501, circular groove 502, upper sealing plate 6, cylinder 601, protrusion 602, upper valve core 7, air hole 8, gear shaft 9, connecting sleeve 10, hydraulic actuator 11, connecting hole 111, limit rib 12, and fan-shaped opening 13.

[0034] Example 1

[0035] like Figures 1 to 6 As shown, the gas pressure regulating valve includes a valve body 2, a valve core located inside the valve body 2, a hydraulic actuator 11 located above the valve core, and a valve cover 1 covering the valve body 2.

[0036] like Figure 2 and Figure 3 As shown, the valve core includes an upper valve core 7 and a lower valve core 3 that are rotatably connected to each other. The upper valve core 7 is hemispherical, and multiple air holes 8 are evenly distributed on the hemispherical surface of the upper valve core 7. An upper sealing plate 6 is fixed on the bottom surface of the upper valve core 7. The lower valve core 3 is a bent tube type. The part of the lower valve core 3 that extends into the valve body 2 is also hemispherical, and a lower sealing plate 5 is provided on the top of the hemispherical part of the lower valve core 3. The part of the lower valve core 3 that extends out of the valve body 2 is a flange structure. The inner hole serves as a gas inlet 301 for connecting to the air intake pipe. An outlet 4 is provided on the valve body 2 on the side opposite to the inlet 301. The outlet 4 communicates with the inner cavity of the valve body 2.

[0037] like Figure 4 As shown, a cylinder 601 protrudes downward from the bottom center of the upper sealing plate 6, and a fan-shaped opening 13 is also provided on the upper sealing plate 6, with downward protrusions 602 on the edge of the fan-shaped opening 13; as Figure 5As shown, the upper surface center of the lower sealing plate 5 is provided with a recessed circular groove 502, and the lower sealing plate 5 is also provided with an arc-shaped sink groove 501, and the bottom of the sink groove 501 is also provided with a fan-shaped opening 13. In assembly, the cylinder 601 of the upper sealing plate 6 is rotatably connected in the circular groove 502 of the lower sealing plate 5; the protrusion 602 of the upper sealing plate 6 is inserted into the sink groove 501 of the lower sealing plate 5, so that when the upper sealing plate 6 rotates relative to the lower sealing plate 5, the upper sealing plate 6 can stably rotate around the axis of the cylinder 601, ensuring that the fan-shaped openings 13 of the upper sealing plate 6 and the lower sealing plate 5 can be accurately aligned or staggered; in addition, the sink groove 501 not only has a guiding effect on the protrusion 602, but also forms a sealing surface between the outer circle side wall of the protrusion 602 and the inner wall of the sink groove 501 when the fan-shaped openings 13 are staggered, so as to prevent gas leakage. Compared with the plugging mode of covering the gas inlet by the valve head in the prior art or the structure of the traditional ball valve and butterfly valve, the sealing surface of the present structure is larger and the sealing effect is more airtight. After the fan-shaped openings 13 of the upper sealing plate 6 and the lower sealing plate 5 are staggered, the distance between them is far apart, so gas is less likely to leak, which can effectively improve the sealing reliability and safety of the pressure regulating valve.

[0038] The fan-shaped openings 13 of the upper sealing plate 6 and the lower sealing plate 5 are each one-fourth of the circular area of the upper sealing plate 6 or the lower sealing plate 5. When the fan-shaped opening 13 is one-fourth, the relative rotation angle of the upper sealing plate 6 and the lower sealing plate 5 and the overlapping area of the opening have a linear relationship, which can make the area of the fan-shaped opening 13 uniformly change from 0% to 100% when the rotation angle changes from 0° to 90°, facilitating intuitive control of flow or pressure through the angle, and also helping to accurately control the flow and pressure. At the same time, the one-fourth fan-shaped opening 13 provides a relatively moderate range of gas flow area change, which neither causes insufficient flow due to too small opening nor makes it difficult to accurately control the flow due to too large opening. In addition, the design of the one-fourth fan-shaped opening 13 does not require complex machining processes and special molds in manufacturing, which can reduce the production difficulty and cost.

[0039] As shown in Figure 2 and Figure 4 The top of the upper valve core 7 is fixed with a gear shaft 9, the gear shaft 9 is fixed with a connecting sleeve 10, the center part below the connecting sleeve 10 is provided with a gear groove, and the upper end of the gear shaft 9 is inserted into the gear groove. The outer periphery of the connecting sleeve 10 is fixed with a limiting rib 12, as shown in Figure 6As shown, the bottom of the hydraulic actuator 11 is provided with a connecting hole 111, and the top of the connecting sleeve 10 can be inserted into the connecting hole 111. The upper valve core 7 is fixed with a gear shaft 9 at the top, and the connecting sleeve 10 is connected to the bottom of the hydraulic actuator 11 on the gear shaft 9, forming a stable power transmission path. The power generated by the hydraulic actuator 11 can be accurately and stably transmitted to the gear shaft 9 through the connecting sleeve 10, and then drive the upper valve core 7 to rotate, ensuring the reliability of power transmission during pressure regulation, and avoiding the influence of power transmission such as slipping and loosening. At the same time, the gear groove and the gear shaft 9 are meshed with each other, which can realize accurate transmission of power. When the hydraulic actuator 11 drives the gear shaft 9 to rotate through the connecting sleeve 10, the upper valve core 7 can rotate at the expected angle and speed due to the accuracy of gear transmission, ensuring accurate regulation of gas flow and pressure of the pressure regulating valve, and avoiding the phenomenon of slipping or idling in the process of power transmission.

[0040] The use method of the present scheme is as follows:

[0041] As shown in Figure 2 The gas flow path is as follows: from the inlet 301 into the inner hole of the lower valve core 3, then through the fan-shaped openings 13 of the lower sealing plate 5 and the upper sealing plate 6 into the upper valve core 7, and then through the gas holes 8 into the inner cavity of the valve body 2, and finally discharged through the outlet 4. The pressure regulating method of the pressure regulating valve is to drive the upper valve core 7 to rotate by the hydraulic actuator 11, so that the fan-shaped openings 13 on the upper sealing plate 6 and the lower sealing plate 5 can be overlapped or staggered, so as to quickly realize the on-off of the gas passage, and cut off or connect the gas supply as needed in a short time. The angle of the staggered fan-shaped openings 13 corresponds to the degree of overlap of the fan-shaped openings 13, so as to realize accurate adjustment of the valve opening and linear regulation of the flow, effectively improve the gas pressure and flow control precision, and can adjust the gas flow in a large range to adapt to the pressure adjustment needs of different environments.

[0042] The gas entering the upper valve core 7 will first pass through the plurality of gas holes 8 of the upper valve core 7, and the plurality of uniformly distributed gas holes 8 can make the gas more uniformly dispersed before entering the cavity in the valve body 2, and then flow out from the outlet 4. The uniformly distributed gas holes 8 reduce the turbulence and pressure fluctuation when the gas rushes in, avoid the single-point high-speed impact of the gas on the pipeline, help to realize more stable gas pressure output, make the gas pressure regulation in the pipeline more smooth and controllable, and also eliminate noise, reduce vibration, avoid pipeline fatigue damage and pipeline rupture risk, and improve the service life of the pipeline.

[0043] The above is only an embodiment of the present application, and the present application is not limited to the field of the embodiment, and the common knowledge such as specific structures and properties in the scheme is not described in detail. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope claimed in the present application should be subject to the content of the claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A gas pressure regulating valve comprising a valve body, a valve spool located within the valve body, and a valve cover overlying the valve body, characterized by: The valve core comprises an upper valve core and a lower valve core which are connected with each other in rotation, the upper valve core is semispherical, a plurality of air holes are uniformly distributed on the semispherical surface of the upper valve core, and an upper sealing plate is fixed on the bottom surface of the upper valve core; the lower valve core is in the shape of a bent pipe, and a lower sealing plate is arranged at the position where the lower valve core is connected with the upper valve core. The upper sealing plate and the lower sealing plate are both provided with a fan-shaped opening, the edge of the fan-shaped opening of the upper sealing plate is provided with a downward protrusion, an arc-shaped recess is arranged on the upper sealing plate, and the fan-shaped opening of the lower sealing plate is arranged at the bottom of the recess, and the protrusion is inserted into the recess.

2. The gas pressure regulating valve according to claim 1, characterized by: The fan-shaped opening of the upper sealing plate or the lower sealing plate is one quarter of the upper sealing plate or the lower sealing plate.

3. The gas pressure regulating valve according to claim 2, characterized by: The bottom center of the upper sealing plate is provided with a downward protruding cylinder, and the upper surface center of the lower sealing plate is provided with a recessed circular groove, and the cylinder is rotatably connected in the circular groove.

4. The gas pressure regulating valve according to claim 3, characterized by: The upper part of the valve body is fixed with a hydraulic actuator, the valve cover is arranged outside the hydraulic actuator, and the hydraulic actuator is used to drive the upper valve core to rotate.

5. The gas pressure regulating valve according to claim 4, characterized by: The top of the upper valve core is fixed with a gear shaft, the gear shaft is fixed with a connecting sleeve, and the upper end of the connecting sleeve is fixedly connected with the bottom of the hydraulic actuator.

6. The gas pressure regulating valve according to claim 5, characterized by: The center of the connecting sleeve is provided with a gear groove, and the gear shaft is inserted into the gear groove.

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