Gas pressure regulating valve

Abstract

The invention 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. The gas pressure can be accurately controlled, more stable gas pressure output is achieved, the gas pressure adjustment is smoother and more controllable, meanwhile, the sealing performance can be guaranteed, the pipeline fatigue damage and pipeline fracture risks are reduced, and the service life of the pipeline is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid pressure actuators, in particular to a gas pressure regulating valve. Background Art

[0002] The gas pressure regulating valve is a common gas pressure control device, which realizes stable control of gas pressure by adjusting the opening size of the pipeline through which the gas flows. Its basic principle is to use the gap between the valve core and the valve seat to control the flow and pressure of the gas. When the gas flows through the gap between the valve core and the valve seat, the position of the valve core determines the flow and pressure of the gas, thereby realizing the regulation and stable control of the gas pressure.

[0003] At present, the conventional gas pressure regulating valve structure usually uses a spring to control the valve opening, and the valve opening is fine-tuned according to the set pressure requirement. When the actual gas pressure is lower than the set pressure, the opening of the regulating valve control pipeline becomes larger to allow more gas to pass through, the gas flow rate increases, and the gas pressure increases; when the gas pressure is higher than the set pressure, the opening of the pressure regulating valve control pipeline decreases to reduce the amount of gas passing through, the gas flow rate decreases, and the gas pressure decreases. For example, the prior art "A dual-purpose regulating valve" (publication number: CN212028666U) discloses a regulating valve structure. After the gas enters from the air inlet, the diaphragm pressure in the valve will increase and rise up, thereby compressing the spring and driving the control block and the valve stem to swing, so that the valve head at the other end of the valve stem blocks the gas inlet. At this time, the gas cannot enter the air cavity of the valve body, and a part of the gas in the air cavity will be discharged from the gas outlet, thereby achieving the purpose of reducing the gas pressure; and when the pressure is reduced to a certain level, the control block and the valve stem are driven by the spring's own rebound force to swing in the opposite direction, so that the valve head at the other end of the valve stem is separated from the gas inlet, so that the gas can enter the air cavity through the gas inlet again, thereby increasing the gas pressure, thereby achieving the purpose of regulating the gas pressure.

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

[0005] 1. Poor pressure regulation stability. The gas inlet of the prior art is opened and closed by blocking 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. When the valve is just opened, the gas will quickly flow into the gas cavity, causing a sudden change in gas pressure. The instantaneous high pressure will have a strong impact on the pipeline, increasing the vibration of the pipeline. In the long run, it may cause fatigue damage to the pipeline, reduce the service life of the pipeline, and even cause the pipeline to rupture.

[0006] 2. Poor sealing. The valve head in the prior art directly covers the gas inlet to achieve sealing. A gap is easily formed between the bottom surface of the valve head and the upper surface of the gas inlet, making it difficult to form a good sealing surface, which leads to gas leakage. In addition, the valve stem is in the shape of a rod, which is prone to deformation during long-term use, causing the valve head at the end of the valve stem to tilt and deform, thereby failing to achieve sealing of the gas inlet, resulting in sealing failure.

[0007] 3. Poor pressure control accuracy. The existing technology uses a valve head to block or detach the gas inlet, and then allows the gas in the gas cavity to flow out naturally, thereby achieving the purpose of decompression. However, this natural outflow method depends on the pressure difference in the gas cavity and the natural diffusion of the gas, and the decompression speed is difficult to control accurately; in some emergency situations where rapid decompression is required, the required decompression effect cannot be achieved in time. Summary of the invention

[0008] The present invention provides a gas pressure regulating valve, which can solve the problem that the valve pressure regulating stability in the prior art is poor, which easily causes sudden changes in pipeline pressure, causes the pipeline to be subjected to high pressure shock for a long time and causes fatigue damage, reduces the pipeline life, and even causes pipeline rupture.

[0009] The present application provides the following technical solution: A gas pressure regulating valve comprises 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 rotatably connected to each other. The upper valve core is hemispherical, and a plurality of air holes are evenly distributed on the hemispherical surface of the upper valve core. An upper sealing plate is fixed to the bottom surface of the upper valve core. The lower valve core is a curved pipe type, and a lower sealing plate is provided 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 fan-shaped openings, the edge of the fan-shaped opening of the upper sealing plate is provided with a downward protrusion, 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 protrusion is inserted into the sinking groove.

[0012] Beneficial effects:

[0013] 1. Stable pressure regulation. The upper valve core has multiple air holes evenly arranged. After the gas enters the upper valve core from the fan-shaped opening of the lower valve core, it will first pass through the multiple air holes of the upper valve core. The multiple evenly distributed air holes can allow the gas to be more evenly dispersed before entering the cavity in the valve body, and then flow out from the valve body outlet. The evenly distributed air holes reduce the turbulence and pressure fluctuations when the gas flows in, avoid the high-speed impact of the gas on the pipeline at a single point, and help to achieve a more stable gas pressure output. While making the gas pressure regulation in the pipeline smoother and more controllable, it can also eliminate noise, reduce vibration, avoid pipeline fatigue damage and pipeline rupture risks, and increase pipeline life.

[0014] 2. Fast response speed, high pressure control accuracy, and wide adjustment range. Through the relative rotation of the upper valve core and the lower valve core, the fan-shaped openings on the upper and lower sealing plates can overlap or stagger, so as to quickly realize the on-off of the gas passage, and can cut off or connect the gas supply as needed in a short time. The staggered angle of the fan-shaped openings corresponds to the degree of overlap of the fan-shaped openings, so as to achieve precise adjustment of the valve opening and linear adjustment of the flow rate, effectively improve the gas pressure and flow control accuracy, and can adjust the gas circulation in a large range to meet the pressure adjustment needs of different environments.

[0015] 3. Improve sealing. The lower sealing plate is provided with an arc-shaped sinking groove, and the edge of the fan-shaped opening of the upper sealing plate is provided with a downward protrusion, which can be inserted into the sinking groove. In this way, when the upper sealing plate and the lower sealing plate rotate relative to each other, on the one hand, the sinking groove guides the protrusion, and on the other hand, when the fan-shaped openings in this scheme are staggered, the outer ring side wall of the protrusion forms a sealing surface with the inner wall of the sinking groove. Compared with the sealing method of the valve head covering the air inlet in the prior art or the traditional ball valve, butterfly valve and other structures, the sealing surface of this scheme is larger and the sealing effect is more stringent. The distance between the upper sealing plate and the lower closed fan-shaped opening is farther after staggering, and the gas is less likely to leak, which can effectively improve the sealing reliability and safety of the pressure regulating valve.

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

[0017] Beneficial effects: When the fan-shaped opening is one-quarter, the relative rotation angle of the upper sealing plate and the lower sealing plate is linearly related to the overlapping area of ​​the opening, so that when the rotation angle changes from 0° to 90°, the fan-shaped opening area changes evenly from 0% to 100%, which is convenient for intuitively controlling the flow or pressure through the angle, and also helps to improve the precise control of the flow and pressure; at the same time, the one-quarter fan-shaped opening provides a relatively moderate range of gas flow area changes, which will not cause insufficient flow due to a too small opening, nor will it be difficult to accurately control the flow due to an too large opening; in addition, the design of a one-quarter fan-shaped opening does not require complex processing technology and special molds in manufacturing, reducing production difficulty and cost.

[0018] Furthermore, a cylinder protrudes downward from the bottom center of the upper sealing plate, and a concave circular groove is provided at the center of the upper surface of the lower sealing plate, and the cylinder is rotatably connected in the circular groove.

[0019] Beneficial effect: The cooperation between the cylinder and the circular groove provides an accurate positioning reference for the relative rotation of the upper and lower sealing plates. During the rotation process, 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 achieving precise control of gas flow and pressure, which helps to improve the adjustment accuracy and stability of the pressure regulating valve.

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

[0021] Beneficial effects: The hydraulic actuator uses the hydraulic system to generate power, which can output a large torque and forcefully drive the upper valve core to rotate, ensuring that the upper valve core can rotate into place quickly and stably, thereby achieving effective regulation of gas flow and pressure. At the same time, the hydraulic system can achieve relatively precise pressure and flow control, so that the hydraulic actuator can accurately control the rotation angle of the upper valve core, which helps to improve the regulation accuracy of the pressure regulating valve; in addition, the response speed of the hydraulic actuator is relatively fast, and it can respond quickly to the control signal, and promptly drive the upper valve core to rotate to adjust the on-off or flow size of the gas, thereby ensuring the stability and reliability of the system.

[0022] Furthermore, a gear shaft is fixed to the top of the upper valve core, a connecting sleeve is fixed to the gear shaft, and 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 on 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, ensuring the reliability of power transmission during the pressure regulation process, and will not easily slip, loosen, or other situations that affect power transmission, thereby ensuring that the pressure regulating valve can work normally.

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

[0025] Beneficial effects: The gear groove and the gear shaft mesh with each other, which can achieve accurate power transmission. When the hydraulic actuator drives the gear shaft to rotate through the connecting sleeve, the accuracy of the gear transmission can ensure that the upper valve core rotates at the expected angle and speed, ensuring the precise regulation of the gas flow and pressure by the pressure regulating valve, avoiding slippage or idling during power transmission. At the same time, the coordination of the gear groove and the gear shaft enhances the stability of the connection, keeps the upper valve core in a stable rotation state, reduces the adjustment error caused by loose connection, and improves the reliability of the pressure regulating valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an axonometric view of the structure of the present invention.

[0027] Figure 2 It is a half-section view of the present invention.

[0028] Figure 3 for Figure 2 Axonometric view of .

[0029] Figure 4 for Figure 3 Isometric view of the upper center spool.

[0030] Figure 5 for Figure 3 Isometric view of the lower center spool.

[0031] Figure 6 for Figure 3 Axonometric view of a hydraulic actuator. DETAILED DESCRIPTION

[0032] The following is further described in detail through specific implementation methods:

[0033] The marks in the drawings of the specification include: valve cover 1, valve body 2, lower valve core 3, inlet 301, outlet 4, lower sealing plate 5, sink 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, limiting rib 12, fan-shaped opening 13.

[0034] Embodiment 1

[0035] like Figures 1 to 6 As shown, the gas pressure regulating valve comprises a valve body 2 , a valve core located in 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 which are rotatably connected to each other. The upper valve core 7 is hemispherical, and a plurality of air holes 8 are evenly distributed on the hemispherical surface of the upper valve core 7. An upper sealing plate 6 is fixed to the bottom surface of the upper valve core 7. The lower valve core 3 is a curved tube type, and the portion of the lower valve core 3 extending into the valve body 2 is also hemispherical, and a lower sealing plate 5 is provided on the hemispherical top of the lower valve core 3. The portion of the lower valve core 3 extending out of the valve body 2 is a flange structure, and the inner hole serves as a gas inlet 301 for connecting to an air intake pipe. An outlet 4 is provided on the valve body 2 on the opposite side of the inlet 301, and the outlet 4 is communicated 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, and a downward protrusion 602 is provided on the edge of the fan-shaped opening 13; Figure 5As shown, a concave circular groove 502 is provided at the center of the upper surface of the lower sealing plate 5, and an arc-shaped sinking groove 501 is also provided on the lower sealing plate 5, and a fan-shaped opening 13 is also provided at the bottom of the sinking groove 501. During assembly, the cylindrical body 601 of the upper sealing plate 6 is rotatably connected to the circular groove 502 of the lower sealing plate 5; the protrusion 602 of the upper sealing plate 6 is inserted into the sinking 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 cylindrical body 601, ensuring that the fan-shaped openings 13 of the upper sealing plate 6 and the lower sealing plate 5 can be accurately Accurately align or stagger; the sink groove 501 not only guides the protrusion 602, but also, when the fan-shaped opening 13 is staggered, the outer ring side wall of the protrusion 602 and the inner wall of the sink groove 501 form a sealing surface to prevent gas leakage. Compared with the sealing method of the valve head covering the air inlet or the traditional ball valve, butterfly valve and other structures in the prior art, the sealing surface of the present structure is larger and the sealing effect is tighter. The upper sealing plate 6 and the lower closed fan-shaped opening 13 are far apart after being staggered, and the 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 is linearly related to the overlapping area of ​​the openings, so that when the rotation angle changes from 0° to 90°, the area of ​​the fan-shaped opening 13 changes evenly from 0% to 100%, which is convenient for intuitively controlling the flow or pressure through the angle, and also helps to accurately control the flow pressure; at the same time, the one-fourth fan-shaped opening 13 provides a relatively moderate range of gas flow area changes, which will not cause insufficient flow due to too small an opening, nor will it be difficult to accurately control the flow due to too large an opening; in addition, the design of the one-fourth fan-shaped opening 13 does not require complex processing technology and special molds in manufacturing, which can reduce production difficulty and cost.

[0039] like Figure 2 and Figure 4 As shown, a gear shaft 9 is fixed to the top of the upper valve core 7, a connecting sleeve 10 is fixed to the gear shaft 9, a gear groove is provided at the center below the connecting sleeve 10, and the upper end of the gear shaft 9 is inserted into the gear groove. Limiting ribs 12 are fixed to both ends of the outer periphery of the connecting sleeve 10, as shown in FIG. 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 gear shaft 9 is fixed on the top of the upper valve core 7, and the connecting sleeve 10 is fixed on the gear shaft 9 and connected to the bottom of the hydraulic actuator 11, 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, thereby driving the upper valve core 7 to rotate, ensuring the reliability of power transmission during the pressure regulation process, and will not easily cause slippage, looseness and other situations that affect power transmission. At the same time, the gear groove and the gear shaft 9 are meshed with each other, which can realize accurate power transmission. When the hydraulic actuator 11 drives the gear shaft 9 to rotate through the connecting sleeve 10, due to the accuracy of the gear transmission, it can ensure that the upper valve core 7 rotates at the expected angle and speed, ensuring that the pressure regulating valve accurately regulates the gas flow and pressure, and avoiding slippage or idling during power transmission.

[0040] Here’s how to use this solution:

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

[0042] The gas entering the upper valve core 7 will first pass through the multiple air holes 8 of the upper valve core 7, and the multiple evenly distributed air holes 8 can allow the gas to be more evenly dispersed before entering the cavity in the valve body 2, and then flow out from the outlet 4. The evenly distributed air holes 8 reduce the turbulence and pressure fluctuations when the gas flows in, avoid the single-point high-speed impact of the gas on the pipeline, help to achieve a more stable gas pressure output, make the gas pressure regulation in the pipeline smoother and more controllable, and can also eliminate noise, reduce vibration, avoid pipeline fatigue damage and pipeline rupture risks, and improve pipeline life.

[0043] The above are only embodiments of the present invention. The invention is not limited to the field involved in this implementation case. The common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. 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, characterized in that: The valve core comprises an upper valve core and a lower valve core which are rotatably connected to each other. The upper valve core is hemispherical, and a plurality of air holes are evenly distributed on the hemispherical surface of the upper valve core. An upper sealing plate is fixed to the bottom surface of the upper valve core. The lower valve core is a curved pipe type, and a lower sealing plate is provided at the position where the lower valve core is connected to the upper valve core. The upper sealing plate and the lower sealing plate are both provided with fan-shaped openings, the edge of the fan-shaped opening of the upper sealing plate is provided with a downward protrusion, 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 protrusion is inserted into the sinking groove.

2. The gas pressure regulating valve according to claim 1, characterized in that: The fan-shaped openings of the upper sealing plate and the lower sealing plate are one quarter of the upper sealing plate or the lower sealing plate.

3. The gas pressure regulating valve according to claim 2, characterized in that: A cylinder protrudes downward from the bottom center of the upper sealing plate, and a concave circular groove is provided at the center of the upper surface of the lower sealing plate, and the cylinder is rotatably connected in the circular groove.

4. The gas pressure regulating valve according to claim 3, characterized in that: A hydraulic actuator is fixed above the valve body, and the valve cover is covered outside the hydraulic actuator. The hydraulic actuator is used to drive the upper valve core to rotate.

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

6. The gas pressure regulating valve according to claim 5, characterized in that: A gear groove is provided at the center of the connecting sleeve, and the gear shaft is inserted into the gear groove.

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