An optimized pump valve structure

Abstract

The application discloses an optimized pump valve structure and relates to the technical field of fluid control devices, which comprises an upper valve seat, a lower valve seat and a valve sheet, the valve sheet is arranged between the upper valve seat and the lower valve seat, a recessed groove is formed in the bottom of the upper valve seat, the valve sheet is embedded in the recessed groove of the upper valve seat, a semi-inclusion positional relationship is formed between the valve sheet and the upper valve seat, the bottom of the valve sheet is collinear with the bottom of the upper valve seat, a groove matched with the valve sheet is arranged at the top of the lower valve seat, and the bottom of the valve sheet is perfectly combined with the groove of the lower valve seat. The recessed groove of the upper valve seat for accommodating the valve sheet and the groove of the lower valve seat for accommodating the valve sheet improve the cut-off performance, and the gradually tapered port treatment reduces the backflow during the working process, thereby reducing the flow loss, and the application has the characteristics of low noise, small resistance and good cut-off performance.

Description

Technical Field

[0001] This application relates to the technical field of fluid control equipment, and in particular to an optimized pump valve structure. Background Technology

[0002] As key components in fluid control, pumps and valves directly impact system energy consumption and efficiency. In recent years, with increasing industrial energy conservation requirements, higher demands have been placed on the sealing and flow resistance characteristics of pumps and valves. Currently, mainstream pumps and valves on the market primarily improve performance through material modifications and surface treatments, but there is still significant room for optimization in structural design.

[0003] Traditional pump and valve structures mainly include two designs: floating valve plate and single-sided fitting. In the floating valve plate design, there is a gap between the valve plate and the valve seat, which can easily lead to media leakage. Although the single-sided fitting design improves the sealing performance, it often results in irregular flow channels on the other side, generating eddies. Both designs have obvious performance defects.

[0004] The main defects of existing pump and valve structures are as follows: First, gaps or unevenness in the sealing surface lead to media leakage; second, unreasonable flow channel design generates eddies that increase flow resistance; and third, insufficient structural stability makes them prone to deformation and wear after long-term use. Utility Model Content

[0005] In view of the above-mentioned prior art, in order to solve the problems that the sealing surface of the existing pump valve structure has gaps or unevenness, which leads to medium leakage, unreasonable flow channel design, eddy currents that increase flow resistance and insufficient structural stability, and is prone to deformation and wear after long-term use, this application provides an optimized pump valve structure.

[0006] This application provides an optimized pump and valve structure, which adopts the following technical solution: An optimized pump valve structure includes an upper valve seat, a lower valve seat, and a valve plate. The valve plate is disposed between the upper and lower valve seats. The bottom of the upper valve seat has a groove, and the valve plate is embedded in the groove of the upper valve seat. The valve plate and the upper valve seat form a semi-enclosed position relationship, and the bottom of the valve plate is collinear with the bottom of the upper valve seat. The top of the lower valve seat has a groove that mates with the valve plate, and the bottom of the valve plate fits perfectly with the groove of the lower valve seat.

[0007] By adopting the above technical solution, the bottom of the valve plate is collinear with the bottom of the upper valve seat, so that there are no irregular structures such as steps or protrusions at the connection between the upper valve seat and the valve plate; the groove of the lower valve seat fits perfectly with the valve plate, which also avoids fluid eddies caused by uneven sealing surfaces. When the medium passes through, the flow path is smooth, the friction resistance and local resistance are significantly reduced, energy loss is reduced, and the flow output efficiency of the pump valve is improved. At the same time, the valve plate is embedded in the groove of the upper valve seat and its bottom is collinear with the bottom of the upper valve seat. It also fits perfectly with the groove of the lower valve seat, forming a dual cooperation structure of "upper limit position + lower seal". Compared with the traditional "valve plate suspension" or "single-sided fitting" design, the contact surface fit is higher, the gaps are completely eliminated, and the leakage path of the medium (liquid, gas or mixed medium) can be effectively blocked.

[0008] Preferably, the side of the valve plate that mates with the upper valve seat is rounded or chamfered, and the inner wall of the groove on the upper valve seat is also rounded or chamfered, with the rounded or chamfered edge of the valve plate matching the rounded or chamfered edge of the upper valve seat.

[0009] By adopting the above technical solutions, the arc or chamfer fit makes the sliding or rotation of the valve plate in the groove (especially the slight angular offset during opening and closing) smoother, avoiding the "jamming" that may occur with right-angle fit (such as frictional interference between the valve plate edge and the groove edge). For pumps and valves that need to respond quickly to pressure changes (such as metering pumps and precision control valves), this smoothness can shorten the opening and closing lag time and improve the flow control accuracy. At the same time, the self-centering characteristic of the arc surface can help the valve plate automatically adjust its posture in the groove. Even if there are slight errors in assembly or slight offset caused by media impact, the arc and chamfer fit can guide the valve plate back to the correct position, ensuring precise alignment with the sealing surface of the lower valve seat groove and avoiding sealing failure caused by positioning deviation.

[0010] Preferably, the lower valve seat is provided with a support seat for supporting the valve plate, and the support seat is located at the center of the lower valve seat.

[0011] By adopting the above technical solution, the central support seat provides a rigid support point for the valve plate, which can significantly improve its impact and vibration resistance. During high-frequency opening and closing or drastic pressure fluctuations, the valve plate will not undergo "shaking deformation" due to instantaneous impact, avoiding instantaneous gaps in the sealing surface caused by deformation, extending the mechanical life of the valve plate, limiting the deformation of the valve plate to a certain extent, reducing mechanical fatigue, and at the same time, the smaller deformation has a faster recovery ability.

[0012] Preferably, the top of the lower valve seat is provided with a sealing protrusion for sealing, and the bottom of the valve plate is provided with a sealing groove that cooperates with the sealing protrusion.

[0013] By adopting the above technical solution, the cooperation between the sealing protrusion and the sealing groove upgrades the valve plate and lower valve seat from "planar contact sealing" to "concave-convex interlocking sealing". In addition to the original planar contact sealing surface, the sidewalls of the protrusion and the groove also form an annular sealing surface, which is equivalent to a double sealing barrier. Even if the planar sealing surface has a small gap due to slight wear, the sidewall seal can still prevent media leakage. At the same time, the concave-convex structure causes the media pressure to act on the sidewall of the groove, pushing the valve plate and the sealing protrusion to fit more tightly (the higher the pressure, the better the fit), forming a "self-tightening seal" effect. Compared with a simple planar seal, the contact pressure is more concentrated, and the sealing surface is less likely to have gaps, effectively blocking the leakage path of gas, liquid or mixed media.

[0014] Preferably, the bottom of the upper valve seat is provided with a protrusion for positioning, the top of the lower valve seat is provided with a slot for cooperating with the protrusion, and the upper valve seat and the lower valve seat are fixedly connected by bolts.

[0015] By adopting the above technical solution, the mechanical positioning of the protrusion and slot, combined with the tightening force of the bolts, forms a double fixing structure, completely restricting the radial and axial displacement of the upper and lower valve seats. Even under conditions of high-frequency opening and closing, severe pressure fluctuations, or equipment vibration, the valve seat connection will not loosen, ensuring that the internal sealing structure is always in a precise fit.

[0016] Preferably, the valve plate is made of rubber that can be extruded and plastically deformed.

[0017] By adopting the above technical solution, the rubber material is elastic, and the contact between the valve plate and the valve seat when the valve plate is opened and closed is a "flexible collision", which can absorb impact energy, avoid hard impact between the rigid valve plate and the valve seat, reduce the wear of the sealing surface and the deformation of the valve seat, and extend the service life of the valve seat and valve plate.

[0018] Preferably, the valve plate is configured as a cantilever beam valve or other types of one-way valve plate.

[0019] By adopting the above technical solutions, the core design of the cantilever beam valve and the one-way valve plate is "one-way opening and reverse closing", which can strictly limit the medium to flow only in the preset direction, completely eliminate reverse backflow, and avoid pump and valve efficiency reduction and system pressure fluctuation caused by backflow.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. The design of the groove for accommodating the valve plate in the upper valve seat and the groove for accommodating the valve plate in the lower valve seat improves the shut-off performance. At the same time, the tapered opening reduces backflow and reduces flow loss during operation. It features low noise, low resistance and good shut-off performance. 2. The rounded chamfer of the valve plate and the upper valve seat groove replaces the right-angle contact with the "arc surface contact", which eliminates stress concentration from a mechanical point of view, improves smoothness from a motion point of view, and enhances reliability from a sealing point of view. 3. The core design of "sealing protrusion + sealing groove" solves the pain points of traditional flat seals, such as "poor resistance to impurities, easy displacement, and easy leakage under high pressure," through "interlocking double sealing + precise radial positioning." Its advantages are not only reflected in the significant improvement of sealing reliability, but also in the enhanced adaptability to operating conditions and the durability of components; 4. By chamfering or rounding the edges of the moving parts of the valve plate, the mass of the valve plate is reduced, the inertia of the valve plate during operation is reduced, the opening pressure is reduced, the fluid flow resistance is reduced, and the smaller mass moving unit has a higher response speed, so the valve plate can open or close in time, thus improving the shut-off performance. Attached Figure Description

[0021] Figure 1 This is an exploded view of the optimized pump and valve structure; Figure 2 This is a front view of the optimized pump and valve structure; Figure 3 This is a structural diagram showing the fit between the upper valve seat and the valve plate; Figure 4 This is a structural diagram showing the fit between the lower valve seat and the valve plate; Figure 5 yes Figure 4 Cross-sectional structural diagram; Figure 6 This is a structural diagram of the lower valve seat; Figure 7 This is a structural diagram of the upper valve seat in Embodiment 2; Figure 8 This is a structural diagram showing the valve plate and upper valve seat without chamfering.

[0022] Reference numerals in the attached drawings: 1. Upper valve seat; 2. Lower valve seat; 3. Valve plate; 4. Groove; 5. Recess; 6. Support seat; 7. Sealing protrusion; 8. Sealing slot; 9. Protrusion; 10. Slot; 11. Groove block. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1 - Appendix Figure 8 This application will be described in further detail.

[0024] This application discloses an optimized pump valve structure.

[0025] Example 1 Reference Figure 1 , Figure 2 and Figure 3An optimized pump valve structure includes an upper valve seat 1, a lower valve seat 2, and a valve plate 3. The upper valve seat 1 and the lower valve seat 2 are fixed together by bolts. The upper valve seat 1 has an inlet, and the lower valve seat 2 has an outlet. The valve plate 3 is located between the upper valve seat 1 and the lower valve seat 2. The valve plate 3 is made of extrudable and plastically deformable rubber. The bottom of the upper valve seat 1 has a groove 4, and the size of the groove 4 is the same as the size of the valve plate 3. The valve plate 3 is embedded in the groove 4, so that the surface of the valve plate 3 fits against the inner wall of the groove 4. The bottom of the valve plate 3 is collinear with the bottom of the upper valve seat 1, and the valve plate 3 and the upper valve seat 1 form a semi-enclosed position relationship, so that the valve plate 3 is completely inserted into the upper valve seat 1. At the same time, the top of the lower valve seat 2 has a groove 5 that cooperates with the valve plate 3. The valve core on the valve plate 3 is perfectly embedded in the groove 5, so that the bottom of the valve plate 3 contacts the top of the lower valve seat 2.

[0026] Through the above scheme, the valve plate 3 is embedded in the groove 4 of the upper valve seat 1 with its bottom collinear with the bottom of the upper valve seat 1, and at the same time, it "perfectly fits" with the groove 5 of the lower valve seat 2, forming a dual-fit structure of "upper limit position + lower seal". Compared with the traditional "valve plate 3 floating" or "single-sided fitting" design, the contact surface fit is higher and the gaps are completely eliminated, which can effectively block the leakage path of liquid, gas or mixed media. This makes the connection between the upper valve seat 1 and the valve plate 3 free of steps, protrusions or other irregular structures. The perfect fit between the groove 5 of the lower valve seat 2 and the valve plate 3 also avoids fluid eddies caused by uneven sealing surfaces. When the medium passes through, the flow path is smooth, the friction resistance and local resistance are significantly reduced, energy loss is reduced, and the flow output efficiency of the pump valve is improved. In addition, the positioning of the groove 4 makes the opening and closing action of the valve plate 3 more precise, without unnecessary shaking, and the friction of the fitting surface is smaller. The valve plate 3 can quickly respond to pressure changes, shorten the opening and closing lag time, and further improve the working cycle and efficiency of the pump valve.

[0027] refer to Figure 4 and Figure 5 The inner wall of the groove 4 on the upper valve seat 1 and the inner wall of the groove 5 on the lower valve seat 2 are both rounded, and the surface of the valve plate 3 is smoothed, so that the valve plate 3 can perfectly fit with the groove 4 and groove 5 on the upper valve seat 1 and the lower valve seat 2, reducing the generation of gaps, making the opening and closing sliding of the valve plate 3 in the upper valve seat 1 smoother, and reducing the friction between the two.

[0028] Through the above solution, since the inner walls of the grooves 4 and recesses 5 of the traditional valve seat are prone to sharp edges and burrs, when the valve plate 3 opens and closes (especially with high-frequency reciprocating motion), the edges and sharp edges will generate "cutting" friction, which will easily lead to edge chipping and scratches on the sealing surface of the valve plate 3 in the long run. Therefore, after the inner wall is smoothed, the sharp edges are blunted and a transition arc is formed. The contact between the valve plate 3 and the inner wall changes from "point / line contact friction" to "surface / arc surface contact". The friction mode is more gentle, avoiding the aggravation of wear caused by local stress concentration. At the same time, after the surface of the valve plate 3 is smoothed, the roughness is reduced. On the one hand, it reduces the adhesion and embedding of small impurities such as particles and dust in the medium on the surface of the valve plate 3, and prevents impurities from becoming "abrasives" that scratch the sealing surface of the valve plate 3 and the valve seat. On the other hand, the smooth surface makes the valve plate 3 fit more tightly with the groove 5 of the lower valve seat 2, reducing the gap for impurities to enter the sealing surface, and further reducing the damage of abrasive wear to the sealing surface.

[0029] refer to Figure 4 and Figure 5 The side of the valve plate 3 that mates with the upper valve seat 1 is rounded or chamfered, and the inner wall of the groove 4 on the upper valve seat 1 is also rounded or chamfered. This allows the rounded or chamfered edges on the valve plate 3 to match the rounded or chamfered edges on the upper valve seat 1, making the sliding or rotation of the valve plate 3 in the groove 4 smoother. This avoids the jamming that may occur when the straight frame is mated, improving the accuracy of flow control. At the same time, the self-centering characteristic of the rounded surface can help the valve plate 3 automatically adjust its posture in the groove 4. Even if there are minor errors in the assembly or slight displacement caused by media impact, the matching of the rounded or chamfered edges can guide the valve plate 3 back to the correct position, ensuring precise alignment with the sealing surface of the groove 5 of the lower valve seat 2, and avoiding sealing failure caused by positioning deviation.

[0030] Meanwhile, the smooth arc or chamfer treatment, making it similar to a conical countersunk hole, optimizes the abrupt interface into a continuous and smooth gradient interface, which greatly reduces the generated eddies. Moreover, this is equivalent to thinning the edge of the valve plate 3, reducing the mass of the valve plate 3, reducing the valve opening pressure, and further reducing local resistance. At the same time, the lower mass has less inertia and momentum, resulting in less noise from repeated impacts on the valve plate during operation.

[0031] refer to Figure 6 A support seat 6 is fixedly connected to the lower valve seat 2. The support seat 6 is used to support the valve plate 3, and the support seat 6 is located at the center of the lower valve seat 2, so that the top of the support seat 6 is aligned with the center of the valve plate 3, thus supporting the center of the valve plate 3. This provides a rigid support point for the valve plate 3, which can significantly improve its impact and vibration resistance, limit the deformation of the valve plate 3 to a certain extent, reduce mechanical fatigue, and at the same time, the smaller deformation has a faster recovery ability.

[0032] refer to Figures 3 to 6The lower valve seat 2 has a sealing protrusion 7 on its top, and the sealing protrusion 7 is square and annular, and there is a pair of them. The bottom of the valve plate 3 has a sealing groove 8 that works with the sealing protrusion 7, and the groove is square and annular, so that the sealing protrusion 7 is stuck in the sealing groove 8 on the valve plate 3, so that the valve plate 3 and the lower valve seat 2 are sealed. Through the cooperation of the sealing protrusion 7 and the sealing groove 8, the valve plate 3 and the lower valve seat 2 are upgraded from "planar contact sealing" to "concave-convex interlocking sealing". In addition to the original planar contact sealing surface, the side wall of the protrusion and the groove also forms an annular sealing surface, which is equivalent to a double sealing barrier. Even if a small gap appears on the flat sealing surface due to slight wear, the side wall seal can still prevent media leakage. At the same time, the concave-convex structure makes the medium pressure act on the side wall of the groove, pushing the valve plate 3 and the sealing protrusion 7 to fit more tightly. The higher the pressure, the better the fit, forming a "self-tightening seal" effect. Compared with a simple flat seal, the contact pressure is more concentrated, and the sealing surface is less likely to have gaps, effectively blocking the leakage path of gas, liquid or mixed media.

[0033] refer to Figure 4 , Figure 5 and Figure 6 The upper valve seat 1 has a protrusion 9 at its bottom, and the lower valve seat 2 has a slot 10 at its top that mates with the protrusion 9. The protrusion 9 of the upper valve seat 1 is inserted into the slot 10 to position and fix the lower valve seat 2 and the upper valve seat 1. Then, bolts are passed through the protrusion 9 and the slot 10 to secure the two together. The mechanical positioning of the protrusion 9 and the slot 10, combined with the tightening force of the bolts, forms a double-fixing structure, completely restricting the radial and axial displacement of the upper and lower valve seats 2. Even under conditions of high-frequency opening and closing, severe pressure fluctuations, or equipment vibration, the valve seat connection will not loosen, ensuring that the internal sealing structure remains in a precise fit.

[0034] refer to Figures 1 to 7 The valve plate 3 in this article is a cantilever beam valve, but it can also be other types of one-way valve plates, such as wheel valves, metal valves and other common valve plates. The core design of the cantilever beam valve and the one-way valve plate is "one-way opening and reverse closing", which can strictly limit the medium to flow only in the preset direction, completely eliminate backflow, and avoid pump and valve efficiency reduction and system pressure fluctuation caused by backflow.

[0035] Example 2 refer to Figure 7This embodiment has the same basic structure as Embodiment 1. The main difference is that the upper valve seat 1 is provided with a groove block 11, and the top of the groove block 11 is fixedly connected to the upper valve seat 1. The valve plate 3 is embedded in the groove block 11, and the groove block 11 is located in the groove 4. This allows the bottom of the valve plate 3 to directly contact the bottom of the lower valve seat 2. The valve plate 3 is first embedded in the groove block 11, and then placed in the groove 4 of the upper valve seat together with the groove block 11, forming a double radial constraint of "groove block 11 + groove 4". This is more stable than the positioning of a single groove 4, and completely eliminates the radial movement or tilting of the valve plate 3 under high-frequency opening and closing and medium impact. At the same time, the bottom of the valve plate 3 skips the original indirect fit structure and directly contacts the bottom of the lower valve seat 2, reducing the small gaps that may be generated by multi-layer fit. The sealing surface changes from "indirect fit" to "direct fit", making the path of medium leakage shorter and more thorough.

[0036] refer to Figure 5 and Figure 8 The fit between valve plate 3 and upper valve seat 1 is compared in terms of arc and right angle. The edge area of ​​the moving part of valve plate 3 is chamfered or rounded to reduce the mass of valve plate and reduce the inertia of valve plate during operation. This can reduce the opening pressure and reduce fluid flow resistance. At the same time, the smaller mass moving unit has a higher response speed, and the valve plate can open or close in time, improving the shut-off performance.

[0037] The implementation principle of this application embodiment is as follows: In implementation, the fluid enters through the inlet of the upper valve seat 1, causing the fluid to push the valve core on the valve plate 3 to work and open, allowing the fluid to pass through the valve plate 3 to reach the outlet on the lower valve seat 2 for processing. At the same time, when the fluid passes through the valve plate 3, there are no steps, protrusions or other irregular structures between the valve plate 3 and the upper valve seat 1, so that the valve plate 3 and the upper valve seat 1 form a semi-enclosed position relationship, making the flow path of the medium smoother when it passes through. The friction resistance and local component gaps reduce the generation of fluid eddies, thereby reducing energy loss. In addition, the arc or chamfered edge on the valve plate 3 makes its mass smaller, its response speed faster, reduces backflow, and reduces the impact force on the valve plate 3, resulting in lower noise.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An optimized pump valve structure, comprising an upper valve seat (1), a lower valve seat (2), and a valve plate (3), wherein the valve plate (3) is disposed between the upper valve seat (1) and the lower valve seat (2), characterized in that, The bottom of the upper valve seat (1) is provided with a groove (4), and the valve plate (3) is embedded in the groove (4) of the upper valve seat (1). The valve plate (3) and the upper valve seat (1) form a semi-enclosed position relationship, and the bottom of the valve plate (3) is collinear with the bottom of the upper valve seat (1). The top of the lower valve seat (2) is provided with a groove (5) that cooperates with the valve plate (3), and the bottom of the valve plate (3) fits perfectly with the groove (5) of the lower valve seat (2).

2. The optimized pump valve structure according to claim 1, characterized in that, The inner wall of the groove (4) on the upper valve seat (1) and the inner wall of the groove (5) on the lower valve seat (2) are both rounded, and the surface of the valve plate (3) is smoothed.

3. The optimized pump valve structure according to claim 1, characterized in that, The side of the valve plate (3) that mates with the upper valve seat (1) is rounded or chamfered, and the inner wall of the groove (4) on the upper valve seat (1) is also rounded or chamfered. The rounded or chamfered side of the valve plate (3) mates with the rounded or chamfered side of the upper valve seat (1).

4. The optimized pump valve structure according to claim 1, characterized in that, The lower valve seat (2) is provided with a support seat (6) for supporting the valve plate (3), and the support seat (6) is located at the center of the lower valve seat (2).

5. The optimized pump valve structure according to claim 1, characterized in that, The lower valve seat (2) is provided with a sealing protrusion (7) for sealing, and the valve plate (3) is provided with a sealing groove (8) for cooperating with the sealing protrusion (7) at the bottom.

6. The optimized pump valve structure according to claim 1, characterized in that, The bottom of the upper valve seat (1) is provided with a protrusion (9) for positioning, and the top of the lower valve seat (2) is provided with a slot (10) that cooperates with the protrusion (9). The upper valve seat (1) and the lower valve seat (2) are fixedly connected by bolts.

7. The optimized pump valve structure according to claim 1, characterized in that, The valve plate (3) is made of rubber that can be extruded and plastically deformed.

8. The optimized pump valve structure according to claim 1, characterized in that, The valve plate (3) is configured as a cantilever beam valve or as another type of one-way valve plate.

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