A double plate check valve body with reduced pressure loss

Abstract

The utility model relates to check valve technical field, concretely is a double -deck check valve valve body that reduces pressure loss, the inside of valve body is equipped with the conical flow divider between two valve plates, and the conical flow divider is located the valve plate front, the top of valve body is equipped with the top seat and the vertical rod of the penetration top seat, vertical rod and top seat sliding connection, the top of vertical rod is equipped with the limiting plate in the top seat upper end, the top of valve body is equipped with the locking cap, the locking cap is buckled on the top seat and is connected with top seat screw thread, the locking cap is located to the top end of vertical rod, the accurate flow distribution of conical flow divider avoids medium direct impact valve plate middle part, its polishing surface reduces medium along the way friction resistance, the arc surface structure of water inlet and water outlet guides medium to go in and out stably, further reduces flow resistance, the above -mentioned design joint action effectively reduces medium energy loss, avoids power equipment and consumes energy consumption additionally because of overcoming resistance, long -term operation can significantly reduce the operation and maintenance cost of water supply and drainage system.

Description

Technical Field

[0001] This utility model relates to the field of check valve technology, specifically to a double-plate check valve body that reduces pressure loss. Background Technology

[0002] As a core control component in water supply and drainage systems (such as secondary water supply in high-rise buildings, municipal pipeline transportation, and circulating water loops in residential communities) to prevent backflow of media, the operating efficiency of double-plate check valves directly affects the overall energy consumption and transportation stability of the system. The middle flow channel of existing double-plate check valves mostly adopts a straight-through design without flow guidance optimization, which results in significant pressure loss during media transportation.

[0003] When the medium flows through the channel, the flow velocity in the central area is highly concentrated, which easily forms a concentrated impact load on the middle of the valve plate. This not only increases the frictional resistance when the valve plate is opened and closed and prolongs the response time, but also generates irregular local eddies in the impact area. These eddies will destroy the stability of the flow field, resulting in a significant increase in the energy loss of the medium. This energy loss is eventually transmitted to power equipment such as water pumps, forcing the equipment to output additional energy to overcome the resistance. In the long run, this will greatly increase the system operation and maintenance costs. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a double-plate check valve body that reduces pressure loss.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a double-plate check valve body for reducing pressure loss, comprising a valve body, an inlet at the front end of the valve body, an outlet at the rear end of the valve body, the outer ends of both the inlet and the outlet being arc-shaped structures, a vertical column being vertically arranged inside the valve body, two valve plates being symmetrically arranged at the front end of the column, and an annular sleeve being provided at the rear end of the valve plate through which the column passes and is rotatably connected to the column, the rear end of the valve plate being connected to the column by a torsion spring; The valve body has a conical diverter block located between two valve plates inside, and the conical diverter block is located in front of the valve plates. The top of the valve body has a top seat and a vertical rod that passes through the top seat. The vertical rod is slidably connected to the top seat. The top of the vertical rod has a limiting plate located at the upper end of the top seat. The valve body has a locking cap on top. The locking cap is fastened to the top seat and threadedly connected to the top seat. The locking cap limits the top end of the vertical rod. The tapered diverter block has a positioning seat at its rear end, a threaded groove at the bottom end of the vertical rod, and a threaded rod at its rear end that is inserted into and threadedly connected to the threaded groove. To make the locking cap more securely installed, the improvement of this utility model is that the top seat is fixed to the upper end of the valve body, and a base plate is fixedly installed at the bottom of the top seat, with the bottom end of the locking cap contacting the base plate. To make the locking cap easier to operate, the present invention is improved by providing anti-slip texture on the outer wall of the locking cap. To reduce pressure loss during use, the present invention is improved in that the portion of the vertical rod inserted into the valve body has a triangular cross-section, with the front end of the triangle located directly above the conical flow divider block. To provide a buffering effect at the conical diverter block, the present invention has the following improvements: the rear end of the conical diverter block is provided with a cavity, a spring is provided in the cavity, the front end of the positioning seat is provided with a positioning block inserted into the cavity, one end of the spring is fixed inside the cavity, and the other end is connected to the front end of the positioning block, and the outer wall of the positioning block is tightly fitted with the inner wall of the cavity. To improve the stability of the conical diverter block during use, the present invention includes an annular baffle fixedly installed at the front end of the positioning seat, and a buffer ring provided at the front end of the annular baffle.

[0006] (III) Beneficial Effects Compared with the prior art, this utility model provides a double-plate check valve body that reduces pressure loss, and has the following beneficial effects: The precise diversion of the conical flow divider prevents the medium from directly impacting the center of the valve plate. Its polished surface reduces frictional resistance along the flow path, and the arc-shaped structure of the inlet and outlet guides the medium smoothly in and out, further reducing flow resistance. These design features work together to effectively reduce energy loss from the medium, preventing additional energy consumption by the power equipment to overcome resistance. Long-term operation can significantly reduce the maintenance costs of the water supply and drainage system. When the medium pressure suddenly increases, the impact force pushes the conical flow divider backward. The positioning block compresses the spring within the cavity, and the spring absorbs part of the impact force through deformation, effectively mitigating instantaneous impact loads and protecting the conical flow divider, positioning seat, annular baffle, and valve body, reducing the risk of damage to components due to rigid impacts. Attached Figure Description

[0007] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is the front view of the present invention; Figure 3 This is a side view of the present invention; Figure 4 This is an assembly drawing of the conical flow divider block in this utility model; In the diagram: 1. Valve body; 2. Inlet; 3. Outlet; 4. Column; 5. Valve plate; 6. Annular sleeve; 7. Torsion spring; 8. Top seat; 9. Vertical rod; 10. Limiting plate; 11. Base plate; 12. Threaded groove; 13. Positioning seat; 14. Threaded rod; 15. Annular baffle; 16. Buffer ring; 17. Conical diverter block; 18. Cavity; 19. Locking cap. Detailed Implementation

[0008] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0009] Please see Figures 1-4 The present invention relates to a double-plate check valve body for reducing pressure loss, comprising a valve body 1, an inlet 2 at the front end of the valve body 1, an outlet 3 at the rear end of the valve body 1, both the outer ends of the inlet 2 and the outlet 3 being arc-shaped structures, a vertical column 4 being vertically arranged inside the valve body 1, two valve plates 5 being symmetrically arranged at the front end of the column 4, an annular sleeve 6 being provided at the rear end of the valve plate 5 being penetrated by the column 4 and rotatably connected to the column 4, and the rear end of the valve plate 5 being connected to the column 4 by a torsion spring 7. The valve body 1 has a conical diverter block 17 located between two valve plates 5 inside, and the conical diverter block 17 is located in front of the valve plate 5. The top of the valve body 1 has a top seat 8 and a vertical rod 9 that passes through the top seat 8. The vertical rod 9 is slidably connected to the top seat 8. The top of the vertical rod 9 has a limiting plate 10 located at the upper end of the top seat 8. The valve body 1 has a locking cap 19 above it. The locking cap 19 is fastened to the top seat 8 and threadedly connected to the top seat 8. The locking cap 19 limits the top end of the vertical rod 9. The tapered diverter block 17 has a positioning seat 13 at its rear end, and the bottom end of the vertical rod 9 has a threaded groove 12. The rear end of the positioning seat 13 has a threaded rod 14 that is inserted into the threaded groove 12 and threadedly connected to the threaded groove 12. To make the locking cap 19 more securely installed, the improvement of this utility model is that the top seat 8 is fixed to the upper end of the valve body 1, and the bottom of the top seat 8 is fixedly provided with a base plate 11, and the bottom end of the locking cap 19 contacts the base plate 11. Medium introduction and flow field optimization: Water flows into the valve body 1 from the inlet 2 at the front end of the valve body 1. The arc-shaped structure at the outer end of the inlet 2 can guide the medium to flow in smoothly and avoid turbulence caused by abrupt changes in cross-section at the inlet.

[0010] At this time, the conical diverter block 17 (with polished surface) located inside the valve body 1 and in front of the two valve plates 5 plays a core guiding role. Its cone tip faces the inlet 2, and its rear end is flush with the vertical column 4 inside the valve body 1, which can evenly guide the high-speed flow in the central region of the medium to both sides of the flow channel. The portion of the vertical rod 9 inserted into the valve body 1 has a triangular cross-section, with the front end of the triangle located directly above the conical diverter block 17. Meanwhile, the section of the vertical rod 9 inserted into the valve body 1 has a triangular cross-section, and the front end of the triangle faces the top of the conical diverter block 17, which can help to organize the flow field, further weaken the concentrated impact force of the medium, and lay the foundation for the smooth flow of the medium in the future. Valve plate 5 opening and closing for media passage: After being diverted by the conical diverter block 17, the medium acts uniformly on two valve plates 5 symmetrically arranged at the front end of the column 4, pushing the valve plates 5 to compress the torsion spring 7 connected between the rear end of the valve plates 5 and the column 4. At the same time, the annular sleeve 6, which is fitted on the column 4 at the rear end of the valve plate 5, rotates around the column 4, causing the two valve plates 5 to open synchronously. The medium can pass smoothly through the area of ​​the valve plate 5 and finally be discharged smoothly to the designated position through the outlet 3 at the rear end of the valve body 1. The outer end of the outlet 3 also adopts an arc surface structure, and the outer diameter is larger than the inner diameter, which can reduce the resistance when the medium is discharged and ensure the continuous and stable conveying process. Operational stability guarantee: The conical diverter block 17 has a cavity 18 at its rear end, and a spring is provided inside the cavity 18. The positioning seat 13 has a positioning block at its front end that is inserted into the cavity 18. One end of the spring is fixed inside the cavity 18, and the other end is connected to the front end of the positioning block. The outer wall of the positioning block is in close contact with the inner wall of the cavity 18.

[0011] Throughout the flow of the medium, the spring can provide flexible buffering for the conical diverter block 17 according to the instantaneous changes in the medium pressure; In this structure, a spring is built into the cavity 18 at the rear end of the conical diverter block 17, and the positioning block at the front end of the positioning seat 13 is inserted into the cavity 18 and connected to the spring to form a flexible buffer system. When the medium pressure suddenly increases, the impact force pushes the conical diverter block 17 to move backward, and the positioning block compresses the spring in the cavity 18. The spring absorbs part of the impact force through deformation. When the pressure decreases, the spring rebounds and pushes the conical diverter block 17 to reset, realizing dynamic self-adaptation to pressure fluctuations. This design can effectively resolve instantaneous impact loads, protect the conical diverter block 17, the positioning seat 13, the annular baffle 15 and the valve body 1, and reduce the risk of damage to components caused by rigid impact.

[0012] An annular baffle 15 is fixedly installed at the front end of the positioning seat 13, and a buffer ring 16 is provided at the front end of the annular baffle 15.

[0013] Meanwhile, the annular baffle 15 fixed at the front end of the positioning seat 13 can limit the displacement range of the conical diverter block 17, and the buffer ring 16 at its front end can effectively isolate the rear end of the conical diverter block 17 from direct contact with the annular baffle 15, reduce component collision and wear, and comprehensively ensure the operational stability of the conical diverter block 17 and surrounding components. Component maintenance and disassembly process: The outer wall of the locking cap 19 is provided with anti-slip texture. When it is necessary to inspect the internal components of the valve body 1, first use the anti-slip texture on the outer wall of the locking cap 19 to increase the friction of the hand, and rotate the locking cap 19 counterclockwise. Since the locking cap 19 is fastened to the top seat 8 and is threadedly connected to the top seat 8, the locking cap 19 can be completely removed from the top seat 8 after rotation. Because the threaded rod 14 at the rear end of the positioning seat 13 is threadedly connected to the threaded groove 12 at the bottom end of the vertical rod 9, the positioning seat 13 can be directly screwed to separate it from the vertical rod 9. Finally, considering that the vertical rod 9 is slidably connected to the top seat 8, and the limiting plate 10 at the top of the vertical rod 9 can prevent the vertical rod 9 from moving down excessively, the vertical rod 9 can be pulled out from the valve body 1 after the positioning seat 13 is removed, so as to separate the vertical rod 9, positioning seat 13, conical diverter block 17 and other components, which is convenient for staff to inspect, clean or replace. This valve body 1 can be stably adapted to various water supply and drainage scenarios such as secondary water supply in high-rise buildings, circulating water circuits in residential communities, and municipal pipeline transportation, and has a wide range of applications.

[0014] Inlet 2 / Outlet 3: Structural characteristics: The radius of curvature of the outer end arc surface is R=1.5D (D is the inner diameter of the interface), which meets the requirements for smooth transition in fluid dynamics; Tapered design (outer diameter / inner diameter = 1.2:1).

[0015] Conical splitter block 17: Material selection: Precipitation hardening stainless steel 17-4PH (05Cr17Ni4Cu4Nb); Key parameters: The cone angle is 75° (verified by orthogonal experiments as the optimal angle for flow splitting efficiency). Surface roughness Ra≤0.8μm, achieved through electrolytic polishing; spring: Material selection: 302 stainless steel spring wire (Grade A2); Positioning seat 13: Material selection: H62 brass (Cu62Zn38), tensile strength ≥300MPa; Vertical rod 9: Material selection: 2Cr13 stainless steel (12Cr13), tensile strength ≥635MPa; Locking cap 19: Material selection: 304 stainless steel (06Cr19Ni10), with knurled surface treatment.

[0016] Buffer ring 16: Material selection: Ethylene propylene diene monomer (EPDM) rubber, Shore hardness 60±5A; Performance metrics: Temperature resistance range: -40℃~120℃, suitable for hot water systems; Compression set ≤20% (100℃×70h).

[0017] Annular baffle 15: Material selection: Polyetheretherketone (PEEK), tensile strength ≥90MPa; Threaded connector (threaded rod 14 / threaded groove 12): Material selection: 316 stainless steel (06Cr17Ni12Mo2), thread precision 6g / 6H; Anti-loosening design: The threaded surfaces are coated with Loctite 243 threadlocker.

[0018] The appropriate torque is 12-15 N•m (controlled by a torque wrench).

[0019] In the description herein, it should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A double-plate check valve body for reducing pressure loss, comprising a valve body (1), an inlet (2) at the front end of the valve body (1), and an outlet (3) at the rear end of the valve body (1), wherein the outer ends of both the inlet (2) and the outlet (3) are arc-shaped structures, characterized in that: The valve body (1) has a vertical column (4) inside. Two valve plates (5) are symmetrically arranged at the front end of the column (4). The rear end of the valve plate (5) is provided with an annular sleeve (6) that is penetrated by the column (4) and rotatably connected to the column (4). The rear end of the valve plate (5) is connected to the column (4) by a torsion spring (7). The valve body (1) is provided with a conical diverter block (17) located between two valve plates (5) inside, and the conical diverter block (17) is located in front of the valve plate (5). The top of the valve body (1) is provided with a top seat (8) and a vertical rod (9) passing through the top seat (8). The vertical rod (9) is slidably connected to the top seat (8). The top of the vertical rod (9) is provided with a limiting plate (10) located at the upper end of the top seat (8). The valve body (1) is provided with a locking cap (19) above it. The locking cap (19) is fastened to the top seat (8) and threadedly connected to the top seat (8). The locking cap (19) limits the top end of the vertical rod (9). The tapered diverter block (17) has a positioning seat (13) at its rear end, and a threaded groove (12) at the bottom end of the vertical rod (9). The positioning seat (13) has a threaded rod (14) at its rear end that is inserted into the threaded groove (12) and threadedly connected to the threaded groove (12).

2. The valve body of a double-plate check valve for reducing pressure loss according to claim 1, characterized in that: The top seat (8) is fixed to the upper end of the valve body (1), and the bottom plate (11) is fixedly installed at the bottom of the top seat (8). The bottom end of the locking cap (19) contacts the bottom plate (11).

3. The valve body of a double-plate check valve for reducing pressure loss according to claim 2, characterized in that: The outer wall of the locking cap (19) is provided with anti-slip texture.

4. The valve body of a double-plate check valve for reducing pressure loss according to claim 3, characterized in that: The portion of the vertical rod (9) inserted into the valve body (1) has a triangular cross-section, with the front end of the triangle located directly above the conical diverter block (17).

5. The valve body of a double-plate check valve for reducing pressure loss according to claim 4, characterized in that: The conical diverter block (17) has a cavity (18) at its rear end. A spring is provided in the cavity (18). The positioning seat (13) has a positioning block inserted into the cavity (18) at its front end. One end of the spring is fixed inside the cavity (18), and the other end is connected to the front end of the positioning block. The outer wall of the positioning block is in close contact with the inner wall of the cavity (18).

6. The valve body of a double-plate check valve for reducing pressure loss according to claim 5, characterized in that: The front end of the positioning seat (13) is fixedly provided with an annular baffle (15), and the front end of the annular baffle (15) is provided with a buffer ring (16).

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