Axial notch multi-stage pressure reducing valve structure
By designing a multi-stage pressure reduction valve structure in the axial notch, the multi-stage throttling surface and shear throttling port can be used to achieve efficient pressure reduction, and the blockage problem is solved through balanced and shear structures, and the existing regulating valves have poor pressure reduction effect and easy blockage in high-pressure differential working conditions, achieving efficient, higher strength and easy maintenance reduction effect.
Patent Information
- Application Number
- CN202421355455.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-13
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-06-13
AI Technical Summary
The existing regulating valves have poor pressure reduction effects in high pressure differential conditions, high processing costs and easy to blockage, and cannot meet the harsh process conditions.
A multi-stage pressure-reducing valve structure with axial notch is designed, including the valve body, valve spool, valve spool sleeve, guide sleeve and upper valve cover. The pressure-reducing effect is achieved through the multi-stage throttling surface and shear throttling port, and a balanced structure and shear structure are used to reduce the risk of blockage.
It achieves a single-stage pass flow and good pressure reduction effect, has a higher strength in the valve core structure, has a self-cleaning function, is not easy to block, and has a simple structure, making it easy to repair, disassemble and assemble.
Smart Images
Figure CN222702585U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of regulating valves, and in particular relates to an axial notch multi-stage pressure-reducing valve structure. Background Art
[0002] In the petrochemical and natural gas liquefaction industries, as the scale of production continues to expand, process parameters are also becoming higher, high pressure difference conditions are appearing more and more frequently, and harsh process conditions make the use of pressure-reducing and regulating valves more and more demanding. The common sleeve valve has poor pressure reduction effect and can no longer meet the high pressure difference conditions. The current multi-stage pressure-reducing disc type has a good pressure reduction effect, but the processing cost is high, large particles cannot appear during use, and clogging problems are very likely to occur. At this time, a pressure-reducing and regulating valve that can meet the high pressure difference working conditions, has a simple structure, can pass large particles, and has low processing costs is needed. Summary of the invention
[0003] In order to solve the above technical problems, the utility model proposes an axial notch multi-stage pressure reduction valve structure.
[0004] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:
[0005] In the first aspect, an embodiment of the utility model provides an axially notched multi-stage pressure-reducing valve structure, including a valve body, a valve core, a valve core sleeve, a guide sleeve and an upper valve cover; the valve core sleeve is placed inside the valve body and a first sealing gasket is used to achieve sealing; the valve core is placed inside the valve core sleeve, and is limited and sealed by the surface; the guide sleeve is placed above the valve core sleeve, and a balancing sealing ring is placed in the middle for sealing; the upper valve cover is fastened to the top of the valve body with bolts, and is sealed with the valve seat and the valve core sleeve with a second sealing gasket and a third sealing gasket; the packing sealing assembly is placed in the upper cavity of the upper valve cover, and a multi-stage throttling surface is arranged along the axial direction of the valve core, each stage of the throttling surface is a notch structure with three equally divided angles, and the notch structures of adjacent stages of the throttling surfaces are staggered radially at 60°; the notch structure of the valve core cooperates with the valve core sleeve to form a shear-type throttling port.
[0006] Furthermore, the lower cavity of the valve core sleeve is processed with small openings evenly distributed around the circumference to achieve a noise reduction function.
[0007] Furthermore, the guide sleeve cooperates with the concave and convex parts of the top of the valve core to achieve a guiding effect and eliminate the vibration problem of the valve core caused by ultra-high pressure.
[0008] Furthermore, the balancing hole includes a first balancing hole extending from top to bottom along the axial direction of the valve core and a second balancing hole extending along the radial direction, and the first balancing hole is connected to the second balancing hole.
[0009] Furthermore, the second balancing hole is located above the valve core sleeve.
[0010] Furthermore, a slope is provided at the bottom of the valve core for sealing and limiting the valve core sleeve.
[0011] Furthermore, two levels of throttling surfaces are provided along the axial direction of the valve core.
[0012] Furthermore, three levels of throttling surfaces are arranged along the axial direction of the valve core.
[0013] Furthermore, four levels of throttling surfaces are arranged along the axial direction of the valve core.
[0014] The beneficial effects of the above-mentioned embodiments of the utility model are as follows:
[0015] 1) The single-stage flow rate is large.
[0016] Each stage of the throttling surface of the valve core has three cutouts, so the throttling area through which the medium passes is larger than that of the valve core structure with two cutouts, and the flow rate passing through is also larger. Therefore, this structure has a larger adjustment range than the valve core structure with two cutouts of the same specification, and is applicable to more working conditions.
[0017] 2) Good blood pressure lowering effect.
[0018] Since the valve core has a three-cut structure, it cooperates with the valve core sleeve to divide the medium into three branches and flow downward. Since each stage of the throttling port is radially staggered at 60°, each branch flow will collide with the medium in the throttling port on the adjacent side when it turns and flows to both sides, offsetting part of the impact force, so as to better reduce the medium pressure and reduce the medium flow rate.
[0019] 3) The valve core structure has higher strength.
[0020] Since the valve core has a three-cut structure, the valve core has a larger remaining cross-sectional area and the material is an equilateral triangle under the same flow conditions as the valve core with two cuts, which means it is more stable, has higher strength, and is not easy to break in an ultra-high pressure environment.
[0021] 3) The valve core structure adopts a balanced type to reduce the closing thrust required for the valve
[0022] A balancing hole is machined on the valve core, and the medium reaches the space above the valve core through the through hole. The valve core is used in conjunction with a balancing sealing ring to isolate the gap to prevent the medium from flowing directly to the back of the valve through this gap, so that the downward unbalanced thrust on the valve core is offset by a part of the upward unbalanced thrust on the bottom of the valve core, thereby reducing the actuator thrust required for the valve and further reducing the price cost.
[0023] 4) The valve has self-cleaning function and is not easy to get clogged.
[0024] The structure of the throttling surface of the valve core is a shear structure, which has a relatively good self-cleaning function and can effectively solve the problems of valve blockage and crystallization.
[0025] 5) Simple structure.
[0026] There are few parts inside the valve body, no threaded connection, and it is easy to maintain and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.
[0028] Figure 1 It is a schematic diagram of the structure of the axial notch multi-stage pressure reducing valve of the utility model;
[0029] Figure 2 It is a three-dimensional diagram of the medium flow simulation in the valve of the utility model;
[0030] Figure 3 This is a schematic assembly diagram of a four-stage pressure-reducing valve core and valve core sleeve;
[0031] In the figure: the distances or sizes between parts are exaggerated to show the positions of the parts, and the schematic diagram is for illustration only;
[0032] 1—valve body, 2—valve core sleeve, 3—valve core, 31—sealing surface, 32—recess structure, 4—first sealing gasket, 5—balance sealing ring, 6—second sealing gasket, 7—third sealing gasket, 8—guide sleeve, 9—stud bolts of unequal length, 10—nuts, 11—upper valve cover, 12—packing seal assembly, 102—balance through hole. DETAILED DESCRIPTION
[0033] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.
[0034] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or their combinations;
[0035] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.
[0036] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the utility model proposes an axial notch multi-stage pressure reduction valve structure.
[0037] Example 1
[0038] In a typical implementation of the present invention, Figure 1 As shown, the present embodiment proposes an axial recessed two-stage pressure reducing valve structure, including a valve core sleeve 2 placed inside a valve body 1 and sealed with a first sealing gasket 4; a valve core 3 placed inside the valve core sleeve 2, limited and sealed by a surface; a guide sleeve 8 placed above the valve core sleeve 2, with a balancing sealing ring 5 placed in the middle for sealing; an upper valve cover 11 is fastened to the valve body 1 with bolts, and is sealed with a valve seat 1 and a valve core sleeve 2 with a second sealing gasket 6 and a third sealing gasket 7; a packing seal assembly 12 is placed in the upper cavity of the upper valve cover 11; the parts assembly structure is shown in FIG. Figure 1 As shown; wherein the throttling surface of the valve core 3 is a notch structure 32 with three equally divided angles, and each stage of the throttling surface is staggered and arranged at 60° radially; the valve core 3 cooperates with the valve core sleeve 2 to form a shear-type throttling port, and in this embodiment, two stages of throttling surfaces are arranged along the axial direction of the valve core 3, and each stage of the throttling surface includes three notch structures 32 with three equally divided angles, and the notch structures of the two stages of the throttling surfaces are staggered and arranged at 60° radially, see Figure 1 The notch structure of the primary throttling surface is evenly distributed at 120° around the circumference to form a primary pressure-reducing profile, and the notch structure of the secondary throttling surface is evenly distributed at 120° around the circumference; the notch structure of the secondary throttling surface is staggered 60° with the primary throttling surface to form a secondary pressure-reducing profile.
[0039] The pressure-reducing valve in this embodiment has a large single-stage flow rate, and the valve core has three cutouts on each throttling surface, so the throttling area through which the medium passes is larger than that of a valve core structure with two cutouts, and the flow rate through is also larger. Therefore, this structure has a larger adjustment range than a valve core structure with two cutouts of the same specification, and is applicable to more working conditions.
[0040] The pressure reducing valve in this embodiment has a good pressure reducing effect. Since the valve core is a three-cut structure, it cooperates with the valve core sleeve to divide the medium into three diversions and flow downward. Since each level of throttling port is radially staggered at 60°, each diversion turns and flows to both sides and collides with the medium of the adjacent throttling port, offsetting part of the impact force, so as to reduce the pressure of the medium and reduce the flow rate of the medium better. For details, see the three-dimensional figure of the medium flow simulation in the valve.
[0041] The medium flows from the inlet through the flow channel hole, flows through the primary throttling surface for diversion, then converges through the valve core sleeve flow channel, then flows through the secondary throttling surface for diversion, then converges through the valve core sleeve flow channel, then flows through the sealing surface at the bottom of the valve core 3, and finally flows through the valve core sleeve noise reduction hole to reach the valve outlet.
[0042] Furthermore, the lower cavity of the structural valve core sleeve 2 is processed with small openings evenly distributed around the circumference to achieve a noise reduction function.
[0043] Furthermore, the guide sleeve 8 achieves a guiding function, thereby eliminating the vibration problem of the valve core 3 caused by the ultra-high pressure.
[0044] Furthermore, a small flow hole is processed inside the valve core 3 to balance the thrust of the medium on the upper and lower parts of the valve core 3 .
[0045] Furthermore, the inclined surface below the valve core 3 is used for sealing and limiting the valve core sleeve 2.
[0046] Furthermore, the valve core sleeve 2 in this embodiment is placed in the valve body 1 and sealed with a sealing gasket.
[0047] The valve core structure of the pressure reducing valve in this embodiment is stronger. Since the valve core is a three-cut structure, the valve core of the three-cut structure has more remaining cross-sectional area and the material is in a regular triangle shape under the same flow conditions as the valve core of the two-cut structure, which means that it is more stable and has higher strength, and is not easy to break in an ultra-high pressure environment.
[0048] The valve core structure of the pressure-reducing valve in this embodiment adopts a balanced structure to reduce the closing thrust required for the valve. A balancing hole 102 is processed on the valve core of the pressure-reducing valve in this embodiment. The balancing hole 102 includes a section of hole extending from top to bottom along the axial direction of the valve core and a section of hole extending along the radial direction, and the two sections of holes are connected; the medium reaches the space above the valve core 3 through the through hole, and the valve core 3 is used in conjunction with a balancing sealing ring to isolate the gap to prevent the medium from flowing directly to the back of the valve through this point, so that the downward unbalanced thrust on the valve core 3 is offset by a part of the upward unbalanced thrust on the bottom of the valve core, thereby reducing the actuator thrust required for the valve, and further reducing the price cost.
[0049] The pressure reducing valve in this embodiment has a self-cleaning function and is not easy to get clogged; the structure of the throttling surface of the valve core of the pressure reducing valve is a shear structure (the fluid switches back and forth between the axial direction and the radial direction to form shear), which has a relatively good self-cleaning function and can effectively solve the problems of valve clogging and crystallization.
[0050] The utility model has a simple structure, fewer parts inside the valve body, no thread connection, and is convenient for maintenance and disassembly.
[0051] Example 2
[0052] As Figure 3 As shown, this embodiment discloses an axial notch four-stage pressure reduction valve structure, which is different from the embodiment 1 in that it is a four-stage pressure reduction, so four-stage throttling surfaces are arranged along the axial direction of the valve core 3, each stage of the throttling surface includes three notch structures with equally divided angles, and the notch structures of adjacent stages of the throttling surface are staggered radially at 60°. Specifically, the notch structure of the first-stage throttling surface and the notch structure of the second-stage throttling surface are staggered radially at 60°; the notch structure of the second-stage throttling surface and the notch structure of the third-stage throttling surface are staggered radially at 60°; the notch structure of the third-stage throttling surface and the notch structure of the fourth-stage throttling surface are staggered radially at 60°.
[0053] The remaining structures are the same as those in Example 1, and please refer to Example 1 for details.
[0054] Example 3
[0055] The present embodiment discloses an axially notched three-stage pressure-reducing valve structure, which differs from Embodiment 1 in that it is a three-stage pressure reduction. Therefore, three-stage throttling surfaces are arranged along the axial direction of the valve core 3, and each stage of the throttling surface includes three notch structures with equally divided angles, and the notch structures of adjacent stages of the throttling surfaces are staggered radially at 60°. Specifically, the notch structure of the first-stage throttling surface and the notch structure of the second-stage throttling surface are staggered radially at 60°; the notch structure of the second-stage throttling surface and the notch structure of the third-stage throttling surface are staggered radially at 60°.
[0056] The remaining structures are the same as those in Example 1, and please refer to Example 1 for details.
[0057] Finally, it should be noted that relational terms such as first and second are merely used to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any actual relationship or order between these entities or operations.
[0058] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. An axial notch multi-stage pressure reducing valve structure, characterized in that: It includes a valve body, a valve core, a valve core sleeve, a guide sleeve and an upper valve cover; the valve core sleeve is placed inside the valve body and sealed by a first sealing gasket; the valve core is placed inside the valve core sleeve and limited and sealed by a surface; the guide sleeve is placed above the valve core sleeve, and a balancing sealing ring is placed in the middle for sealing; the upper valve cover is fixedly connected to the top of the valve body, and is sealed with the valve seat and the valve core sleeve by a second sealing gasket and a third sealing gasket; the packing sealing assembly is placed in the upper cavity of the upper valve cover, and a multi-stage throttling surface is arranged along the axial direction of the valve core, each stage of the throttling surface is a notch structure with three equally divided angles, and the notch structures of the throttling surfaces of adjacent stages are staggered radially at 60°; the notch structure of the valve core cooperates with the valve core sleeve to form a shear-type throttling port.
2. An axial notch multi-stage pressure reducing valve structure as claimed in claim 1, characterized in that: The lower cavity of the valve core sleeve is processed with small openings evenly distributed around the circumference to achieve a noise reduction function.
3. The axial notch multi-stage pressure reducing valve structure according to claim 1, characterized in that: The guide sleeve is matched with the top of the valve core in a concave-convex manner.
4. The axial notch multi-stage pressure reducing valve structure according to claim 1, characterized in that: A balancing hole is machined inside the valve core to balance the medium thrust exerted on the upper and lower parts of the valve core.
5. The axial notch multi-stage pressure reducing valve structure according to claim 4, characterized in that: The balancing hole comprises a first balancing hole extending from top to bottom along the axial direction of the valve core and a second balancing hole extending along the radial direction, and the first balancing hole is connected to the second balancing hole.
6. An axially notched multi-stage pressure reducing valve structure as claimed in claim 5, characterized in that: The second balancing hole is located above the valve core sleeve.
7. The axially recessed multi-stage pressure reducing valve structure according to claim 1, characterized in that: The bottom of the valve core is provided with an inclined surface for sealing and limiting the valve core sleeve.
8. The axially recessed multi-stage pressure reducing valve structure according to claim 1, characterized in that: Two levels of throttling surfaces are arranged along the axial direction of the valve core.
9. The axially recessed multi-stage pressure reducing valve structure according to claim 1, characterized in that: The three-level throttling surface is arranged along the axial direction of the valve core.
10. The axial notch multi-stage pressure reducing valve structure according to claim 1, characterized in that: Four levels of throttling surfaces are arranged along the axial direction of the valve core.