Horizontal flow guide safety valve

Abstract

The invention relates to the technical field of safety valves, in particular to a horizontal flow guide safety valve which comprises a valve body and a piston assembly, the valve body is provided with a first flow channel and a second flow channel, an outlet of the first flow channel is connected with an inlet of the second flow channel, and the piston assembly is arranged in the first flow channel. The piston assembly is suitable for communicating or dividing the first flow channel and the second flow channel and comprises a piston and a flow guide cone component, the end, close to the second flow channel, of the piston is connected with the flow guide cone component, and the radial size of the flow guide cone component is gradually reduced in the direction close to the second flow channel. According to the horizontal flow guide safety valve, fluid is guided, and vibration and noise during operation are reduced.

Description

Technical Field

[0001] This application relates to the field of safety valve technology, and in particular to a horizontal flow-directing safety valve. Background Technology

[0002] A safety valve is a reclosable overpressure protection device that can use the pressure of the medium itself to discharge a rated flow of fluid, thereby relieving some of the pressure in pressure vessels, pressure pipelines, boilers, and other pressure-bearing devices and equipment, preventing damage to the system or equipment due to overpressure, and ensuring the normal operation of the device and equipment as well as the safety of the operators.

[0003] A horizontally oriented pilot-operated safety valve is commonly used in related technologies. In this type of valve, the main valve spool faces the main valve outlet and bears the pressure of the outlet medium. The main valve spool achieves the primary seal by relying on the medium force on the piston. This increases the valve's sealing force and effectively prevents the risk of medium leakage from the gas chamber to the outlet.

[0004] However, in the discharge process of a horizontal valve structure, the medium in the main valve body cavity flows out to the outlet at the same time, and they impact each other at the center of the valve body cavity, generating a central vortex. The generation and breakage of the vortex cause the safety valve to generate pneumatic noise and vibration. Summary of the Invention

[0005] This application provides a horizontal flow-directing safety valve that guides fluid flow and reduces vibration and noise during operation.

[0006] This application provides a horizontal flow-directing safety valve, comprising:

[0007] The valve body is provided with a first flow channel and a second flow channel, and the outlet of the first flow channel is connected to the inlet of the second flow channel.

[0008] A piston assembly is disposed within the first flow channel, and the piston assembly is adapted to connect or divide the first flow channel and the second flow channel.

[0009] The piston assembly includes a piston and a flow guide cone component. The end of the piston near the second flow channel is connected to the flow guide cone component, and the radial dimension of the flow guide cone component gradually decreases along the direction near the second flow channel.

[0010] The horizontal flow-guiding safety valve of this application guides the fluid flow, reducing vibration and noise during operation.

[0011] In some embodiments, the piston assembly further includes a valve seat having a first hole communicating with a first flow channel and a second flow channel. The guide cone component includes a fastener and a guide cone, the fastener passing through the guide cone and connected to the piston. The radial dimension of the piston is greater than the radial dimension of the first hole. The piston assembly moves to open or close the first hole.

[0012] In some embodiments, the guide cone includes a first segment, a second segment, and an arc segment connected in sequence, the arc segment being disposed at an end away from the piston, the radial dimension of the first segment being smaller than the radial dimension of the second segment, and the radial dimension of the arc segment gradually decreasing.

[0013] In some embodiments, the outer contour of the longitudinal section of the arc segment on the piston axis is arc-shaped, and the outer contour of the arc segment is concave towards the piston axis.

[0014] In some embodiments, the first hole includes a third segment, a fourth segment, and a fifth segment connected in sequence. The inlet of the third segment is connected to the inlet of the first flow channel. The radial dimension of the third segment gradually decreases in the direction away from the first flow channel, and the radial dimension of the fifth segment gradually increases in the direction away from the first flow channel. The radial dimension of the fourth segment is smaller than the radial dimension of the third or fifth segment.

[0015] In some embodiments, the radial dimension of the fourth segment is D, and the maximum radial dimension of the arc segment is A, then 3 / 4D is satisfied. <A<D。

[0016] In some embodiments, the radial dimension of the fourth segment is D, and the minimum radial dimension of the arc segment is E, then E≤1 / 5D.

[0017] In some embodiments, the tangent of the minimum radial dimension of the arc segment has a preset angle B with the piston, and 4°≤B≤10°.

[0018] In some embodiments, the dimension of the guide cone in the direction of the piston axis is C, and 1 / 2D≤C≤2 / 3D.

[0019] In some embodiments, the number of fasteners is multiple, and the multiple fasteners are spaced apart in the circumferential direction of the guide cone. Attached Figure Description

[0020] To more clearly illustrate the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of a horizontal flow-guiding safety valve provided in an embodiment of this application;

[0022] Figure 2 for Figure 1 Enlarged schematic diagram of region F in the middle;

[0023] Figure 3 This is a schematic diagram of the guide cone provided in an embodiment of this application.

[0024] Figure 4 A schematic diagram of a horizontal flow-guiding safety valve provided in an embodiment of this application;

[0025] Figure 5 This is a schematic diagram of the guide cone provided in an embodiment of this application.

[0026] Figure 6 This is a schematic cross-sectional view of the guide cone in the MM direction provided in an embodiment of this application.

[0027] The above figures include the following reference numerals:

[0028] Valve body 1, first flow channel 11, second flow channel 12, first orifice 13, third section 131, fourth section 132, fifth section 133

[0029] Piston assembly 2, piston 21, flow guide cone component 22, fastener 221, flow guide cone 222, first section 2221, second section 2222, arc section 2223. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0031] It should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "installed," "connected," and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two elements. The terms "parallel," "perpendicular," and "equal" include the described situation and situations similar to the described situation, the range of which is within an acceptable deviation range, wherein the acceptable deviation range is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, where an acceptable deviation range for approximate parallelism can be, for example, within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, where an acceptable deviation range for approximate perpendicularity can also be, for example, within 5°. "Equal" includes absolute equality and approximate equality, where an acceptable deviation range for approximate equality can be, for example, a difference between the two equal items being less than or equal to 5% of either one. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] This application provides a horizontal flow-directing safety valve, comprising:

[0034] Valve body 1, the valve body 1 is provided with a first flow channel 11 and a second flow channel 12, the outlet of the first flow channel 11 is connected to the inlet of the second flow channel 12;

[0035] Piston assembly 2 is disposed within the first flow channel 11 and is adapted to connect or separate the first flow channel 11 and the second flow channel 12.

[0036] The piston assembly 2 includes a piston 21 and a guide cone component 22. One end of the piston 21 near the second flow channel 12 is connected to the guide cone component 22. The radial dimension of the guide cone component 22 gradually decreases along the direction near the second flow channel 12.

[0037] The horizontal flow-guiding safety valve of this application guides the fluid flow, reducing vibration and noise during operation.

[0038] Specifically, such as Figures 1 to 6 As shown, piston assembly 2 is disposed within the first flow channel 11. Piston assembly 2 moves in the left-right direction within the first flow channel 11 to close or open the second flow channel 12, thereby connecting or separating the first flow channel 11 and the second flow channel 12.

[0039] The right end of piston 21 is connected to guide cone component 22, whose radial dimension gradually decreases from left to right, to guide and direct the fluid flowing from the first flow channel 11 into the second flow channel 12. During the valve opening and discharge process, that is, when the first flow channel 11 and the second flow channel 12 are connected, the guide cone component 22 plays a guiding role, thereby eliminating the generation of central vortex.

[0040] The horizontal flow-guiding safety valve of this embodiment can guide the fluid by setting the flow-guiding cone component 22, thereby reducing vibration and noise during operation. Compared with existing horizontal flow-guiding safety valves, when the valve body 1 is opened, the medium in the main valve body 1 cavity flows out to the outlet simultaneously, and they impact each other at the center of the valve body 1 cavity, generating a central vortex. This causes the horizontal flow-guiding safety valve to vibrate and generate noise, reducing its service life and stability during use.

[0041] Furthermore, the shape of the guide cone component 22 can be frustum-shaped, and the generatrix of the frustum can be an arc-shaped line, so as to better guide the fluid and avoid the fluid from impacting the first flow channel 11 and the second flow channel 12, thereby generating vortices and improving the stability of the horizontal guide safety valve when guiding the flow.

[0042] In some embodiments, the piston assembly 2 further includes a valve seat, the valve seat having a first hole 13 communicating with the first flow channel 11 and the second flow channel 12, the guide cone component 22 includes a fastener 221 and a guide cone 222, the fastener 221 passes through the guide cone 222 and is connected to the piston 21, the radial dimension of the piston 21 is greater than the radial dimension of the first hole 13, and the piston assembly 2 moves to open or close the first hole 13.

[0043] Specifically, such as Figures 1 to 6As shown, a valve seat is positioned between the second flow channel 12 and the first flow channel 11 to connect them. The valve seat has a first hole 13. The piston assembly 2 moves left and right to close and open the first hole 13. The radial dimension of the piston assembly 2 is larger than the radial dimension of the first hole 13 to facilitate the left and right movement of the piston assembly 2 to seal the first hole 13. The left end of the fastener 221 passes through the guide cone 222 and is connected to the piston 21 to fix the guide cone 222 on the piston 21. The radial dimension of at least part of the guide cone 222 gradually decreases from left to right. For example, the radial dimension of the right end of the guide cone 222 gradually decreases from left to right to guide the fluid flowing from the first flow channel 11 to the second flow channel 12. The guide cone 222 guides the flow of the fluid medium, preventing the medium from impacting each other in the center of the valve body 1 cavity, thereby eliminating the generation of central vortices and reducing the noise of the horizontal guide safety valve during use.

[0044] In some embodiments, the guide cone 222 includes a first segment 2221, a second segment 2222, and an arc segment 2223 connected in sequence. The arc segment 2223 is located at an end away from the piston 21. The radial dimension of the first segment 2221 is smaller than that of the second segment 2222, and the radial dimension of the arc segment 2223 gradually decreases.

[0045] Specifically, such as Figures 1 to 6 As shown, the first segment 2221 is provided at the left end, and the piston 21 is provided with a groove at the right end to install the first segment 2221. The radial dimension of the second segment 2222 is greater than that of the first segment 2221, so that the second segment 2222 is at least partially attached to the right end of the piston 21, so as to stably fix the guide cone 222 on the piston 21.

[0046] The left end of the second segment 2222 connects to the right end of the first segment 2221, and the right end of the second segment 2222 connects to the left end of the arc-shaped segment 2223. The arc-shaped segment 2223 extends in the left-right direction, and the radial dimension of the arc-shaped segment 2223 of the guide cone 222 gradually decreases from left to right to guide the fluid at the connection between the first flow channel 11 and the second flow channel 12. The arc-shaped segment 2223 of the guide cone 222 has the characteristic of gradually decreasing radial dimension from left to right to optimize the fluid flow at the connection between the first flow channel 11 and the second flow channel 12. When the fluid flows from the first flow channel 11 into the second flow channel 12, due to the gradual change in the radial dimension of the arc-shaped segment 2223, the fluid can be guided more smoothly, reducing eddies and pressure losses generated at the connection, ensuring that the fluid passes through the entire guide structure efficiently and smoothly, reducing the vibration and noise of the valve body 1, and improving the fluid transmission performance of the entire system.

[0047] In some embodiments, the outer contour of the longitudinal section of the arc segment 2223 on the piston 21 axis is arc-shaped, and the outer contour of the arc segment 2223 is concave towards the piston 21 axis.

[0048] A longitudinal section of the arc-shaped segment 2223 is taken along the axial direction of piston 21, and its outer contour is arc-shaped. Furthermore, this arc-shaped outer contour does not bulge outwards, but rather is concave towards the axial direction of piston 21. When fluid flows through the connection between the first flow channel 11 and the second flow channel 12, the concave outer contour of the arc-shaped segment 2223 can better conform to the flow trend of the fluid, providing good guidance. This helps the fluid pass through the connection more smoothly and steadily, reducing undesirable flow phenomena such as eddies and turbulence caused by fluid impact, reducing energy loss, and thus improving the efficiency and stability of the entire fluid transmission system.

[0049] In some embodiments, the first hole 13 includes a third segment 131, a fourth segment 132, and a fifth segment 133 connected in sequence. The inlet of the third segment 131 is connected to the inlet of the first flow channel 11. The radial dimension of the third segment 131 gradually decreases in the direction away from the first flow channel 11, and the radial dimension of the fifth segment 133 gradually increases in the direction away from the first flow channel 11. The radial dimension of the fourth segment 132 is smaller than the radial dimension of the third segment 131 or the fifth segment 133.

[0050] Specifically, such as Figures 1 to 6 As shown, the first orifice 13 includes, from left to right, a third section 131, a fourth section 132, and a fifth section 133. The inlet of the third section 131 is connected to the first flow channel 11, the outlet of the third section 131 is connected to the inlet of the fourth section 132, the outlet of the fourth section 132 is connected to the inlet of the fifth section 133, and the outlet of the fifth section 133 is connected to the second flow channel 12.

[0051] The radial dimension of the third segment 131 is larger than that of the fourth segment 132, and the radial dimension of the third segment 131 gradually decreases from left to right. The radial dimension of the fifth segment 133 is larger than that of the fourth segment 132, and the radial dimension of the fifth segment 133 gradually increases from left to right. This causes the first orifice 13 to form a Laval nozzle-like effect. When the fluid enters the third segment 131 of the first orifice 13 from the first flow channel 11, the fluid is compressed due to the gradually decreasing radial dimension of the third segment 131, resulting in an increased flow velocity and pressure. Then, the fluid enters the fourth segment 132, which has a smaller radial dimension, further adjusting the flow state. Finally, it enters the fifth segment 133, which has a gradually increasing radial dimension, allowing the fluid to be further accelerated. This achieves a Laval nozzle-like optimization effect on fluid flow, helping to improve the efficiency and performance of fluid transmission between the first flow channel 11 and the second flow channel 12.

[0052] In some embodiments, the radial dimension of the fourth segment 132 is D, and the maximum radial dimension of the arc segment 2223 is A, then 3 / 4D is satisfied. <A<D。

[0053] Specifically, such as Figures 1 to 6As shown, the fourth segment 132 is cylindrical, and its radial dimension is constant. The maximum radial dimension of the arc apex is A, which is the same as the radial dimension of the second segment 2222. In other words, the radial dimension A of the maximum outer circle of the guide cone 222 is smaller than the diameter D of the valve seat throat, but A is greater than 3 / 4 of D. This ensures that when the first orifice 13 of the valve is not fully open, the flow area of ​​the first ring formed between the piston 21 and the valve seat, the flow area of ​​the second ring formed between the guide cone 222 and the valve seat, and the flow channel area of ​​the valve seat throat constitute the flow area of ​​the fourth segment 132. When the valve reaches its full opening height, the minimum flow channel area of ​​the valve should be the flow area of ​​the fourth segment 132 to ensure that the valve's discharge capacity meets the expected design requirements. At the same time, when the valve reaches its full opening height, the area of ​​the first ring is greater than the area of ​​the second ring, and the area of ​​the second ring is greater than the area of ​​the third ring, thus forming a Laval tube effect.

[0054] In other words, the flow area of ​​the fourth segment 132, which is part of the first orifice 13, directly affects the smoothness and flow rate of fluid passing through the valve. Setting the minimum flow area of ​​the fourth segment 132 in the fully open state allows the fluid to meet the flow requirements while reducing undesirable flow phenomena such as eddies and turbulence caused by abrupt changes in flow area. This reduces energy loss, improves the fluid transmission efficiency of the entire valve system, and ensures stable valve operation under different working conditions.

[0055] Furthermore, the radial dimension of the fourth segment 132 is D, and the minimum radial dimension of the arc segment 2223 is E. Therefore, E≤1 / 5D is satisfied, thereby avoiding interference between the guide cone 222 and the valve seat throat, which would affect the valve's discharge capacity.

[0056] Furthermore, the tangent of the minimum radial dimension of the arc segment 2223 has a preset included angle B with the piston 21, where 4°≤B≤10°. This ensures that the guide cone 222 achieves maximum flow guiding effect and avoids excessive flow loss when the valve discharges.

[0057] In some embodiments, the dimension of the guide cone 222 in the direction of the piston 21 axis is C, and 1 / 2D≤A≤2 / 3D. If the dimension C of the guide cone 222 in the direction of the piston 21 axis is less than 1 / 2D, its guiding effect cannot be fully utilized, and the guiding effect is limited. If the dimension C is too large, for example, C is greater than 2 / 3D, it will not only increase the overall weight and manufacturing cost of the valve, but also affect the response speed of the valve.

[0058] Furthermore, there are multiple fasteners 221, which are spaced apart in the circumferential direction of the guide cone 222 to increase the stability of the connection between the guide cone 222 and the piston 21.

[0059] The foregoing has provided a detailed description of the method provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A horizontal flow-directing safety valve, characterized in that, include: The valve body is provided with a first flow channel and a second flow channel, and the outlet of the first flow channel is connected to the inlet of the second flow channel. A piston assembly is disposed within the first flow channel, and the piston assembly is adapted to connect or divide the first flow channel and the second flow channel. The piston assembly includes a piston and a flow guide cone component. The end of the piston near the second flow channel is connected to the flow guide cone component, and the radial dimension of the flow guide cone component gradually decreases along the direction near the second flow channel.

2. The horizontal flow-guiding safety valve according to claim 1, characterized in that, The piston assembly further includes a valve seat, the valve seat having a first hole connecting the first flow channel and the second flow channel, the guide cone component including a fastener and a guide cone, the fastener passing through the guide cone and connected to the piston, the radial dimension of the piston being greater than the radial dimension of the first hole, and the piston assembly moving to open or close the first hole.

3. The horizontal flow-guiding safety valve according to claim 2, characterized in that, The guide cone includes a first section, a second section, and an arc-shaped section connected in sequence. The arc-shaped section is located at the end away from the piston. The radial dimension of the first section is smaller than that of the second section, and the radial dimension of the arc-shaped section gradually decreases.

4. The horizontal flow-guiding safety valve according to claim 3, characterized in that, The outer contour of the longitudinal section of the arc segment on the piston axis is arc-shaped, and the outer contour of the arc segment is concave towards the piston axis.

5. The horizontal flow-guiding safety valve according to claim 4, characterized in that, The first hole includes a third segment, a fourth segment, and a fifth segment connected in sequence. The inlet of the third segment is connected to the inlet of the first flow channel. The radial dimension of the third segment gradually decreases in the direction away from the first flow channel. The radial dimension of the fifth segment gradually increases in the direction away from the first flow channel. The radial dimension of the fourth segment is smaller than the radial dimension of the third or fifth segment.

6. The horizontal flow-guiding safety valve according to claim 5, characterized in that, The radial dimension of the fourth segment is D, and the maximum radial dimension of the arc segment is A. Therefore, 3 / 4D satisfies this condition. <A<D。 7. The horizontal flow-guiding safety valve according to claim 5, characterized in that, The radial dimension of the fourth segment is D, and the minimum radial dimension of the arc segment is E. Therefore, E ≤ 1 / 5D.

8. The horizontal flow-guiding safety valve according to claim 5, characterized in that, The tangent of the minimum radial dimension of the arc segment has a preset included angle B with the piston, and 4°≤B≤10°.

9. The horizontal flow-guiding safety valve according to claim 5, characterized in that, The dimension of the guide cone in the direction of the piston axis is C, and 1 / 2D≤C≤2 / 3D.

10. The horizontal flow-guiding safety valve according to any one of claims 2-9, characterized in that, The number of fasteners is multiple, and the multiple fasteners are spaced apart in the circumferential direction of the guide cone.

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