Overflow valve
By setting wave-shaped protrusions on the outer periphery of the overflow valve core, a spiral flow is formed, which solves the turbulence problem caused by the small valve opening of the overflow valve and improves flow stability and energy efficiency.
Patent Information
- Application Number
- CN202520780216.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-04-23
AI Technical Summary
Existing overflow valves have a small valve orifice cross-section, which leads to a sharp increase in liquid flow velocity, causing turbulence and resulting in problems such as noise, vibration, and energy loss.
Design an overflow valve with wave-shaped protrusions on the outer periphery of the valve core to form a spiral flow, reduce turbulent eddies, lower the flow resistance coefficient, and optimize the flow field.
It effectively reduces turbulent eddies, lowers hydraulic noise, and improves flow stability and energy utilization efficiency.
Smart Images
Figure CN223894589U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hydraulic valve technology, and in particular to an overflow valve. Background Technology
[0002] In mechanical hydraulic systems, relief valves are typically installed to prevent excessive system pressure from exceeding limits. This ensures that the system does not experience pressure overshoot due to excessive pressure, thus guaranteeing operational stability and protecting the hydraulic equipment. Normally, the relief valve's spool closes under spring pressure. For the valve to open, the hydraulic pressure on one side of the spool must be greater than the elastic force on the other side to allow fluid to enter the valve chamber. However, due to the small cross-section of the valve opening, the fluid velocity increases sharply as it flows through, intensifying collisions between fluid particles and promoting turbulence. This can lead to problems such as noise, vibration, and energy loss.
[0003] Therefore, there is an urgent need for an overflow valve to solve the above-mentioned technical problems. Utility Model Content
[0004] The purpose of this invention is to provide an overflow valve that can reduce turbulent eddies when liquid flows through the valve port, thereby reducing flow resistance, stabilizing flow pressure, and reducing noise.
[0005] To achieve this objective, the present invention adopts the following technical solution:
[0006] An overflow valve, comprising:
[0007] The valve seat includes an oil inlet and an oil return port, and the oil inlet and the oil return port are connected through an oil passage. The inner wall of the valve seat is provided with an abutment portion, which is located between the oil inlet and the oil return port.
[0008] The valve core is movably disposed within the valve seat along the axial direction of the valve seat. The valve core can abut against or move away from the abutting part to close or open the oil passage. The valve core is provided with a circumferential protrusion, and the protrusion has a wave-shaped structure.
[0009] Preferably, multiple protrusions are provided, and the multiple protrusions are distributed at intervals along the axial direction of the valve core.
[0010] Preferably, the end of the protrusion furthest from the valve core is a wave crest, and the spacing between two adjacent wave crests is the same.
[0011] Preferably, the valve core includes a first valve core segment and a second valve core segment connected in sequence. A plurality of protrusions are disposed on the outer periphery of the first valve core segment. When the first valve core segment abuts against the abutting part, the plurality of protrusions are located in the oil passage. The second valve core segment can extend into the oil passage and form an oil passage gap with the oil passage. The oil passage gap communicates with the oil inlet hole.
[0012] Preferably, along the axial direction of the second valve core section, the oil passage gap is arranged in an annular cavity between the second valve core section and the inner wall of the oil passage.
[0013] Preferably, the overflow valve includes an oil passage groove, and multiple oil inlets are evenly arranged along the circumference of the valve seat, with the axes of the multiple oil inlets forming an angle with the axis of the oil passage.
[0014] Preferably, the valve core further includes a third valve core section, which is disposed at the end of the second valve core section away from the first valve core section, and the third valve core section slides and guides the inner wall of the oil passage.
[0015] Preferably, the overflow valve further includes an elastic component and an adjusting component. The adjusting component is disposed at the end of the valve seat away from the oil inlet. The adjusting component is threadedly engaged with the valve seat. One end of the elastic component abuts against the adjusting component, and the other end abuts against the valve core.
[0016] Preferably, the elastic component includes an elastic element and a spring seat. One end of the elastic element is connected to or abuts against the spring seat, and the other end abuts against the adjusting component. The side of the spring seat opposite to the elastic element abuts against the valve core.
[0017] Preferably, the adjusting assembly is provided with a limiting cavity along the axial direction, and the end of the elastic element away from the spring seat can extend into the limiting cavity and abut against the bottom of the limiting cavity.
[0018] The beneficial effects of this utility model are:
[0019] This utility model discloses a relief valve. The relief valve includes a valve seat and a valve core. The valve seat includes an oil inlet and an oil return hole, and the oil inlet and the oil return hole are connected by an oil passage. The inner wall of the valve seat is provided with an abutment portion, which is located between the oil inlet and the oil return hole. The valve core is movably disposed within the valve seat along the axial direction of the valve seat. The valve core can abut against or move away from the abutment portion to close or open the oil passage. The valve core is provided with a circumferential protrusion, and the protrusion has a wave-shaped structure.
[0020] Because the outer periphery of the valve core has a wave-shaped protrusion, the hydraulic oil can form a spiral flow when passing through the gap between the valve core and the contact part, thereby effectively reducing turbulent eddies, reducing the flow resistance coefficient, optimizing the flow field, and effectively reducing hydraulic noise. Attached Figure Description
[0021] Figure 1 This is a cross-sectional schematic diagram of the overflow valve provided by this utility model;
[0022] Figure 2 This is a cross-sectional view of the overflow valve provided by this utility model after the valve core has been removed;
[0023] Figure 3 This is a schematic diagram of the valve core of the overflow valve provided by this utility model;
[0024] Figure 4 This is a partial cross-sectional view of the valve core of the overflow valve provided by this utility model;
[0025] Figure 5 This is another partial cross-sectional view of the valve core of the overflow valve provided by this utility model;
[0026] Figure 6 This utility model provides Figure 2 A magnified view of a portion of the image.
[0027] In the picture:
[0028] 10. Valve seat; 11. Oil inlet; 12. Oil return hole; 13. Oil passage; 14. Abutment part; 15. Oil passage gap; 16. Cavity;
[0029] 20. Valve core; 21. Protrusion; 22. First valve core section; 23. Second valve core section; 24. Third valve core section;
[0030] 30. Elastic component; 31. Elastic element; 32. Spring seat;
[0031] 40. Adjusting assembly; 41. Adjusting rod; 411. Limiting cavity; 42. Screw sleeve; 43. Nut;
[0032] 50. Sealing components. Detailed Implementation
[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0036] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0037] To prevent pressure overshoot in hydraulic systems due to excessive pressure, relief valves are typically installed. However, because the cross-section of the relief valve orifice is small, the flow velocity increases sharply when the liquid flows through it, intensifying collisions between fluid particles, promoting turbulence, and consequently causing problems such as noise, vibration, and energy loss.
[0038] To solve the above technical problems, this embodiment provides an overflow valve, such as... Figures 1-6 As shown, the overflow valve includes a valve seat 10 and a valve core 20. The valve seat 10 includes an oil inlet hole 11 and an oil return hole 12, and the oil inlet hole 11 and the oil return hole 12 are connected through an oil passage 13. The inner wall of the valve seat 10 is provided with an abutment portion 14, which is located between the oil inlet hole 11 and the oil return hole 12. The valve core 20 is movably disposed within the valve seat 10 along the axial direction of the valve seat 10. The valve core 20 can abut against or move away from the abutment portion 14 to close or open the oil passage 13. The valve core 20 is provided with a protrusion 21 in the circumferential direction, and the protrusion 21 has a wave-shaped structure.
[0039] Since the valve core 20 can abut against the abutment portion 14 of the valve seat 10, it can seal the oil passage 13. When hydraulic oil enters the oil passage 13 through the oil inlet 11, the hydraulic oil can push the valve core 20, thereby ensuring the hydraulic effect. When the valve core 20 moves inward along the axial direction of the valve seat 10, the valve core 20 can disengage from the abutment portion 14, and some hydraulic oil can flow back through the return oil hole 12. During this process, since the outer periphery of the valve core 20 is provided with a wave-shaped protrusion 21, it can make the hydraulic oil form a spiral flow when pushing the valve core 20 away from the abutment portion 14, thereby effectively reducing turbulent eddies, thereby reducing the flow resistance coefficient and achieving the effect of optimizing the flow field, effectively reducing hydraulic noise.
[0040] It is worth noting that the end of protrusion 21 furthest from valve core 20 is a wave crest (e.g., Figure 4 and Figure 5 The position indicated by the superscript number M (hereinafter referred to as the peak M) can be as follows: Figure 4 The ripple shape shown only has peak M, but it can also be like... Figure 5 The diagram shows a sinusoidal waveform with both peaks M and troughs N. Using a corrugated structure with only peaks M reduces processing difficulty and ensures ease of fabrication. If a sinusoidal waveform with both peaks M and troughs N is used, the troughs N can guide the oil to some extent; that is, both peaks M and troughs N work together to reduce the effect of turbulent eddies. In this embodiment, a corrugated protrusion 21 with only peaks M is used to reduce processing difficulty. In other embodiments, the appropriate structure can be selected for processing based on actual needs.
[0041] Specifically, such as Figure 1 and Figure 3 As shown, multiple protrusions 21 are provided, and the multiple protrusions 21 are distributed at intervals along the axial direction of the valve core 20. This arrangement enables the hydraulic oil to form a smoother spiral flow when passing through the oil passage 13 and entering the valve seat 10, thereby ensuring that the gradient of hydraulic oil flow rate does not increase, effectively reducing the collision of fluid micro-particles, reducing the formation of turbulent eddies, and thus effectively reducing vibration and energy loss.
[0042] In addition, such as Figure 4 and Figure 5As shown, the end of the protrusion 21 furthest from the valve core 20 is a wave crest M, and the spacing between two adjacent wave crests M is the same. Regardless of whether a corrugated structure (with only wave crests M) or a sinusoidal waveform structure (with both wave crests M and troughs N) is used, this arrangement allows multiple protrusions 21 to be periodically distributed, thereby reconstructing the flow path of the hydraulic oil and ensuring that the hydraulic oil smoothly forms a spiral flow state after passing through the oil passage 13, effectively reducing noise and vibration caused by turbulence; furthermore, the periodically arranged multiple protrusions 21 move synchronously with the valve core 20, improving the linearity of flow control and thus enhancing the dynamic response effect in the hydraulic process.
[0043] It should be noted here that, in this embodiment, the following is used: Figure 4 The structure shown only has a corrugated shape with peaks M, and the spacing between two adjacent peaks M is 0.4 mm. The vertical distance between peak M and the outer surface of valve core 20 is 0.1 mm. If a structure like... Figure 5 The waveform shown has both peaks M and troughs N. The spacing between two adjacent peaks M is 0.8 mm, and the vertical distance between peaks M and troughs N and the outer surface of valve core 20 is 0.1 mm.
[0044] In other embodiments, the spacing between two adjacent wave crests and the vertical distance between the wave crest and the outer surface of the valve core 20 can be adjusted according to actual needs, as long as the hydraulic effect can be successfully achieved and a spiral flow state can be formed. Furthermore, the multiple protrusions 21 are all formed using laser micromachining technology. Laser micromachining technology has the capability of high-precision and micro-scale processing, and it is widely applicable to materials, highly flexible, and environmentally friendly.
[0045] It should be noted here that, as Figure 1 and Figure 2 As shown, the relief valve also includes an elastic component 30 and an adjusting component 40. The adjusting component 40 is located at the end of the valve seat 10 away from the oil inlet 11, and is threadedly engaged with the valve seat 10. One end of the elastic component 30 abuts against the adjusting component 40, and the other end abuts against the valve core 20. When no hydraulic oil is supplied, the elastic force of the elastic component 30 can push the valve core 20 and make it abut against the abutment portion 14 of the valve seat 10, thereby ensuring a good sealing effect inside the valve seat 10 when the relief valve is not in the working state. The adjusting component 40 can adjust the preload of the elastic component 30, thereby improving the applicability of the relief valve and ensuring that it can be used in a variety of working conditions. In addition, the threaded engagement between the adjusting component 40 and the valve core 20 facilitates subsequent maintenance and parts replacement, thereby improving ease of use.
[0046] Specifically, such as Figure 1As shown, the elastic component 30 includes an elastic element 31 and a spring seat 32. One end of the elastic element 31 is connected to or abuts against the spring seat 32, and the other end abuts against the adjusting component 40. The side of the spring seat 32 facing away from the elastic element 31 abuts against the valve core 20. The spring seat 32 facilitates the installation of the elastic element 31, improving ease of use and stability when the elastic element 31 is compressed. Furthermore, in this embodiment, the elastic element 31 is a spring, which has a simple structure and low cost, thus reducing manufacturing costs.
[0047] In addition, it should be noted that, such as Figure 1 and Figure 2 As shown, the adjusting assembly 40 includes an adjusting rod 41, a screw sleeve 42, and a nut 43. The adjusting rod 41 passes through the screw sleeve 42 and the nut 43, and is threadedly engaged with the screw sleeve 42 and the nut 43 respectively. The outer circumference of the screw sleeve 42 is threadedly connected to the valve seat 10 and fixed by the nut 43. The valve seat 10 has a cavity 16 inside. When it is necessary to adjust the preload of the elastic element 31, simply loosen the nut 43 first, then screw the adjusting rod 41 to move it axially into the cavity 16 until the preset position is reached. Then tighten the nut 43 to fix it. This is not only simple to operate, but also convenient for subsequent maintenance and replacement. It also makes it easy to adjust the preload of the elastic element 31 for different working conditions.
[0048] Based on this, the adjusting rod 41 in the adjusting assembly 40 is provided with a limiting cavity 411 along the axial direction. The end of the elastic member 31 away from the spring seat 32 can extend into the limiting cavity 411 and abut against the bottom of the limiting cavity 411. This arrangement can limit and fix the elastic member 31, preventing it from shaking when the valve core 20 compresses the elastic member 31, ensuring that the elastic member 31 will not move in a direction deviating from the axis of the valve seat 10, thereby ensuring a good hydraulic effect. In addition, in order to avoid hydraulic oil leakage, a sealing member 50 is provided between the adjusting rod 41 and the inner wall of the cavity 16, thereby preventing hydraulic oil from leaking from the fitting gap between the adjusting rod 41 and the cavity 16, thereby producing a good hydraulic effect. It should be noted that the sealing member 50 can be any structure such as an O-ring or a sealing ring, as long as it can ensure a good sealing effect. This embodiment is not limited.
[0049] Specifically, such as Figure 1 and Figure 2As shown, the valve core 20 includes a first valve core section 22 and a second valve core section 23 connected in sequence. Multiple protrusions 21 are disposed on the outer periphery of the first valve core section 22. When the first valve core section 22 abuts against the abutting part 14, the multiple protrusions 21 are located in the oil passage 13. The second valve core section 23 can extend into the oil passage 13 and form an oil passage gap 15 with the oil passage 13. The oil passage gap 15 is connected to the oil inlet hole 11. This arrangement allows multiple protrusions 21 to be directly mounted on the first valve core section 22, thereby simplifying the overall structure of the valve core 20 and reducing manufacturing costs. At the same time, since the second valve core section 23 can extend into the oil passage 13 and form an oil passage gap 15 with the oil passage 13, the hydraulic oil can smoothly push the valve core 20 after entering the oil passage gap 15 from the oil inlet 11. When the first valve core section 22 abuts against the abutting part 14, the multiple protrusions 21 are located in the oil passage 13. That is, the multiple protrusions 21 with the corrugated structure can make the hydraulic oil in the oil passage gap 15 form a spiral flow state, thereby ensuring that turbulence is reduced while opening the valve core 20, reducing energy loss and hydraulic noise.
[0050] It should be noted that in this embodiment, the abutment portion 14 is an abutment corner. When the valve core 20 contacts the abutment portion 14, the first valve core section 22 can form a cone seal with the abutment corner, thereby ensuring a good sealing effect, avoiding hydraulic oil leakage, and thus improving the hydraulic effect.
[0051] Specifically, such as Figure 1 As shown, along the axial direction of the second valve core section 23, the oil passage gap 15 is arranged in an annular cavity between the second valve core section 23 and the inner wall of the oil passage 13. It should be noted that the diameter of the second valve core section 23 is smaller than the diameter of the oil passage 13. That is, after the second valve core section 23 extends into the oil passage 13, an annular cavity is naturally formed between the outer periphery of the second valve core section 23 and the inner wall of the valve seat 10. This annular cavity is the oil passage gap 15, which ensures that the hydraulic oil can fill the entire annular cavity after entering from the oil inlet hole 11. This increases the effective area of the hydraulic oil in the first valve core section 22, thereby smoothly pushing the valve core 20 to compress the elastic element 31 and complete the hydraulic operation.
[0052] In addition, such as Figure 1 , Figure 3 and Figure 6 As shown, multiple oil inlet holes 11 are evenly arranged along the circumference of the valve seat 10, and the axes of the multiple oil inlet holes 11 are all set at an angle to the axis of the oil passage 13. The even arrangement of multiple oil inlet holes 11 ensures uniform oil injection and allows hydraulic oil to quickly fill the oil passage gap 15, improving the opening speed of the valve core 20; while the angle between the oil inlet holes 11 and the oil passage 13 (e.g., ...) Figure 6As shown, the angle between the oil inlet hole 11 and the oil passage 13 is α (and the angle α is an acute angle), which can play a certain buffering role for the hydraulic oil, preventing the hydraulic oil from directly entering the oil passage gap 15 and impacting the second valve core section 23. In turn, it can work together with multiple protrusions 21 to reduce the formation of turbulent eddies.
[0053] In other embodiments, the overflow valve also includes an oil passage groove located on the valve seat 10 and / or the second valve core section 23. When the oil passage groove is located on the valve seat 10, the groove wall of the oil passage groove is recessed relative to the inner wall of the valve seat 10 towards the side away from the second valve core section 23 to form an oil passage gap 15. When the oil passage groove is located on the second valve core section 23, the groove wall of the oil passage groove is recessed relative to the surface of the second valve core section 23 towards the side away from the valve seat 10 to form an oil passage gap 15. The oil passage gap 15 formed by the above structure can be a groove extending along the axial direction of the valve core 20, or it can be an annular gap. Regardless of the structure, it can ensure that the hydraulic oil flows in the oil passage gap 15 and pushes the valve core 20 to compress the elastic component 30. Therefore, according to actual needs, it is possible to choose a structure in which the oil passage groove is only opened on the valve seat 10, or a structure in which the oil passage groove is only opened on the second valve core section 23, or a structure in which the oil passage groove is opened on both the valve seat 10 and the valve core 20. This embodiment does not limit this.
[0054] In addition, such as Figure 1 and Figure 3 As shown, the valve core 20 also includes a third valve core section 24, which is located at the end of the second valve core section 23 away from the first valve core section 22, and the third valve core section 24 slides and guides the inner wall of the oil passage 13. This structure can ensure the stability of the valve core 20 when sliding along the axial direction, effectively avoid the valve core 20 from shaking, thereby producing a good hydraulic effect and improving the user experience.
[0055] In summary, the overflow valve in this embodiment, by providing multiple protrusions 21 on the outer periphery of the valve core 20, and the multiple protrusions 21 forming a periodic corrugated structure, can reconstruct the flow path of hydraulic oil when passing through the gap between the valve core 20 and the contact part 14, and make the hydraulic oil form a spiral flow, thereby improving the linearity of flow control, thereby improving the dynamic response effect in the hydraulic process, effectively reducing turbulent eddies, and further reducing the flow resistance coefficient and hydraulic noise, thus achieving the purpose of optimizing the flow field.
[0056] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. An overflow valve, characterized in that, include: The valve seat (10) includes an oil inlet hole (11) and an oil return hole (12), and the oil inlet hole (11) and the oil return hole (12) are connected through an oil passage (13). The inner wall of the valve seat (10) is provided with an abutment part (14), and the abutment part (14) is disposed between the oil inlet hole (11) and the oil return hole (12). The valve core (20) is movably disposed within the valve seat (10) along the axial direction of the valve seat (10). The valve core (20) can abut against or move away from the abutting part (14) to close or open the oil passage (13). The valve core (20) is provided with a protrusion (21) in the circumferential direction, and the protrusion (21) has a wave-shaped structure.
2. The overflow valve according to claim 1, characterized in that, The protrusions (21) are provided in multiple ways, and the multiple protrusions (21) are distributed at intervals along the axial direction of the valve core (20).
3. The overflow valve according to claim 2, characterized in that, The end of the protrusion (21) away from the valve core (20) is a wave crest, and the distance between two adjacent wave crests is the same.
4. The overflow valve according to claim 2, characterized in that, The valve core (20) includes a first valve core section (22) and a second valve core section (23) connected in sequence. A plurality of protrusions (21) are disposed on the outer periphery of the first valve core section (22). When the first valve core section (22) abuts against the abutting part (14), the plurality of protrusions (21) are located in the oil passage (13). The second valve core section (23) can extend into the oil passage (13) and form an oil passage gap (15) with the oil passage (13). The oil passage gap (15) communicates with the oil inlet hole (11).
5. The overflow valve according to claim 4, characterized in that, Along the axial direction of the second valve core section (23), the oil passage gap (15) is arranged in an annular cavity between the second valve core section (23) and the inner wall of the oil passage (13).
6. The overflow valve according to claim 5, characterized in that, Multiple oil inlet holes (11) are evenly arranged along the circumference of the valve seat (10), and the axes of the multiple oil inlet holes (11) are all set at an angle to the axis of the oil passage (13).
7. The overflow valve according to claim 4, characterized in that, The valve core (20) further includes a third valve core section (24), which is located at the end of the second valve core section (23) away from the first valve core section (22), and the third valve core section (24) slides and guides the inner wall of the oil passage (13).
8. The overflow valve according to any one of claims 1-6, characterized in that, The overflow valve also includes an elastic component (30) and an adjusting component (40). The adjusting component (40) is disposed at one end of the valve seat (10) away from the oil inlet (11). The adjusting component (40) is threadedly engaged with the valve seat (10). One end of the elastic component (30) abuts against the adjusting component (40), and the other end abuts against the valve core (20).
9. The overflow valve according to claim 8, characterized in that, The elastic component (30) includes an elastic element (31) and a spring seat (32). One end of the elastic element (31) is connected to or abuts against the spring seat (32), and the other end abuts against the adjusting component (40). The side of the spring seat (32) away from the elastic element (31) abuts against the valve core (20).
10. The overflow valve according to claim 9, characterized in that, The adjustment assembly (40) is provided with a limiting cavity (411) along the axial direction. The end of the elastic member (31) away from the spring seat (32) can extend into the limiting cavity (411) and abut against the bottom of the limiting cavity (411).