Non-retention flow passage control valve

Abstract

The present application relates to control valve technical field, especially to a non-stagnant flow channel control valve, which comprises a valve body, a ball core rotatably arranged in the middle of the valve body, and a residual mechanism arranged in the valve body; a triangular protrusion is fixedly arranged on the lower side of the inner wall of the ball core, and the middle part of the protrusion is higher than the two sides; the residual mechanism comprises elastic sealing seats installed on both sides of the valve body, arc-shaped spring sheets one and two arranged in cross, a storage bin installed at the bottom of the valve body, and a feeding pipe arranged in the valve body, one end of the feeding pipe being connected to the middle part of the elastic sealing seat and the other end being connected to the storage bin; when the ball core is closed, the protrusion divides the residual medium in the ball core into two parts and flows to the elastic sealing seat area, and the medium is guided to the inside of the storage bin through the feeding pipe; the present application further comprises a limiting mechanism composed of a driving rod, a connecting seat and a baffle, and an automatic compensation sealing mechanism composed of a rubber ring, a limiting ring, a sliding shaft and a spring.

Description

Technical Field

[0001] This invention relates to the field of control valve technology, and in particular to a non-retention type flow channel control valve. Background Technology

[0002] In sanitary fluid control systems, biopharmaceutical production lines, and food and beverage processing equipment, control valves, as key actuators in pipeline systems for controlling media flow and regulating flow, directly impact the cleanliness and product quality of the entire system through their internal flow channel design. For pipelines transporting water for injection, purified water, dispensing systems, and high-purity chemical media, control valves not only require excellent sealing performance and operational reliability, but also demand internal flow channel structures that prevent media residue, inhibit microbial growth, and facilitate online cleaning and sterilization. Therefore, non-retention flow channel design has become a crucial technological development direction in the field of high-end control valves.

[0003] In existing technologies, there are many types of control valves used in the aforementioned fields, commonly including gate valves, diaphragm valves, and traditional ball valves. Among them, traditional ball valves are widely used in various fluid control systems due to their compact structure, convenient operation, and low flow resistance. A traditional ball valve typically consists of a valve body, a ball core, a valve seat, and a drive rod. Its working principle involves rotating the ball core to align or misalign the internal through-hole with the flow channel of the valve body, thereby controlling the flow of the medium. To ensure the sealing performance between the ball core and the valve seat, a certain clearance is usually maintained between them. The valve seat is often made of elastic material and is pre-tightened to fit the surface of the ball core. Furthermore, the connection between the valve body and the pipeline is usually achieved using flanges, threads, or clamps, with end-face sealing achieved through gaskets.

[0004] However, in the closed state, traditional ball valves create a closed annular cavity between the internal flow channel of the ball core and the valve body. This area cannot be naturally flushed by the medium, and the medium easily accumulates and stagnates here. Long-term stagnant media can deteriorate, crystallize, or breed microorganisms, affecting not only the quality of subsequent production batches but also potentially causing corrosion or blockage of the valve body's internal structure. In severe cases, it can even lead to cross-contamination of the entire pipeline system. Therefore, this application proposes a non-stagnant flow channel control valve. Summary of the Invention

[0005] The purpose of this invention is to address the problem in the prior art that, in the closed state, a closed annular cavity region is formed between the internal flow channel of the ball core and the valve body, which cannot be naturally flushed by the medium and the medium easily accumulates and forms stagnation here. The invention proposes a non-stagnation flow channel control valve.

[0006] The technical solution of the present invention: a non-retention type flow channel control valve, including a valve body, wherein a ball core is rotatably disposed in the middle of the valve body, and a protrusion is fixedly disposed on the lower side of the inner wall of the ball core; the control valve further includes a retention removal mechanism disposed inside the valve body; The retaining mechanism includes elastic sealing seats installed on both sides inside the valve body. Inside the valve body, on both sides of the elastic sealing seats, there are two arc-shaped spring plates, one and two. The ends of the arc-shaped spring plate one and the middle of the arc-shaped spring plate two are installed on the outer wall of the elastic sealing seat. The arc-shaped spring plate two and the arc-shaped spring plate one are arranged crosswise, and the arc-shaped spring plate two is located inside the arc-shaped spring plate one. A storage bin is installed at the bottom of the valve body. A feeding pipe is provided inside the valve body. One end of the feeding pipe is located in the middle of the elastic sealing seat, and the other end of the feeding pipe is installed inside the storage bin.

[0007] Optionally, the two elastic sealing seats are respectively fitted onto both sides of the outer wall of the ball core, and the diameter of the elastic sealing seats is larger than the through hole in the middle of the ball core.

[0008] Optionally, the protrusion is triangular in shape, with the height in the middle greater than that on both sides.

[0009] Optionally, a drive rod is mounted on the top of the ball core, and the drive rod is rotatably connected to the valve body via a connecting seat.

[0010] Optionally, a handle is installed on the top of the drive rod, and a baffle is also installed on the outer wall of the drive rod between the connecting seat and the handle, and the baffle is limited by bolts on both sides of the connecting seat.

[0011] Optionally, two bases are installed at the bottom of the valve body, and the two bases are respectively located on both sides of the storage bin. Valve covers are installed at both ends of the valve body, and the valve body and valve covers are connected by fixing bolts.

[0012] Optionally, the control valve may also include a sealing mechanism disposed inside the valve body; The sealing mechanism includes a rubber ring that is slidably disposed inside the valve body and the valve cover. A sealing plate is installed on the outer wall of the rubber ring close to the valve cover, and an annular groove for the rubber ring to slide is provided inside the valve cover.

[0013] Optionally, a limiting ring is installed on the outer wall of the rubber ring away from the sealing plate, and the limiting ring is slidably disposed inside the valve body.

[0014] Optionally, a sliding shaft is installed inside the limiting ring, and a spring is sleeved on the outer wall of the sliding shaft, and the sliding shaft is slidably disposed inside the valve body.

[0015] Optionally, one end of the spring is installed inside the limiting ring, and the other end of the spring is installed inside the valve body.

[0016] Compared with the prior art, this application includes at least one of the following beneficial technical effects: This invention solves the technical problem of easy accumulation of media in the valve cavity of traditional ball valves by setting a triangular protrusion structure on the lower side of the inner wall of the ball core. The protrusion structure is high in the middle and low on both sides, and the medium remaining inside the ball core is forced to flow to both sides when the ball core is closed. In conjunction with the elastic sealing seat and the feeding pipe, the stagnant medium is actively guided to the storage bin for centralized collection. The structural design completely solves the technical problem of easy accumulation of medium in the valve cavity of traditional ball valves.

[0017] Furthermore, the cross-arc spring plates 1 and 2 provide continuous and stable elastic support to the elastic sealing seat. At the same time, the automatic compensation sealing mechanism composed of rubber ring, limit ring, sliding shaft and spring can automatically compensate for the decrease in clamping force caused by temperature changes, pressure fluctuations or creep of sealing material during the valve cover clamping process, ensuring that the valve maintains reliable sealing performance during long-term operation.

[0018] Finally, by setting a baffle on the drive rod and cooperating with the bolts on both sides of the connecting seat to form a mechanical limiting structure, it is ensured that the ball core can accurately stop at the fully open or fully closed position after each rotation, avoiding damage to the sealing surface or deviation of the flow channel caused by excessive rotation. At the same time, the base structure at the bottom of the valve body ensures the installation stability of the valve in the pipeline system and effectively extends the overall service life of the valve. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of a non-retention flow channel control valve; Figure 2 An exploded view of the structure of a non-retention flow channel control valve; Figure 3 This is a schematic diagram of the drive rod structure of a non-retention flow channel control valve; Figure 4 A schematic diagram of the ball core structure of a non-retention flow channel control valve; Figure 5 This is a schematic diagram of the internal structure of a non-retention flow channel control valve body; Figure 6 This is a schematic diagram of the elastic sealing seat structure of a non-retention type flow channel control valve; Figure 7 This is a schematic diagram of the protruding structure of a non-retention type flow channel control valve; Figure 8 for Figure 3 Schematic diagram of the structure at point A in the middle.

[0020] Reference numerals in the attached diagram: 1. Valve body; 2. Connecting seat; 3. Drive rod; 4. Handle; 5. Baffle; 6. Base; 7. Storage bin; 8. Ball core; 9. Protrusion; 10. Elastic sealing seat; 11. Arc-shaped spring plate one; 12. Arc-shaped spring plate two; 13. Feeding pipe; 14. Valve cover; 15. Annular groove; 16. Fixing bolt; 17. Rubber ring; 18. Limiting ring; 19. Sealing plate; 20. Sliding shaft; 21. Spring. Detailed Implementation

[0021] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0022] Example 1 like Figures 1-7 As shown, the present invention proposes a non-retention type flow channel control valve, which includes a valve body 1 and a removal mechanism disposed inside the valve body 1. A ball core 8 is rotatably disposed in the middle of the valve body 1, and a protrusion 9 is fixedly disposed on the lower side of the inner wall of the ball core 8. The removal mechanism includes elastic sealing seats 10 installed on both sides inside the valve body 1. Inside the valve body 1, on both sides of the elastic sealing seats 10, are arc-shaped spring plates 11 and 12. The ends of arc-shaped spring plates 11 and the middle of arc-shaped spring plates 12 are installed on the outer wall of the elastic sealing seats 10. Arc-shaped spring plates 12 and 11 are arranged crosswise, with the second arc-shaped spring plate 12 located inside the first arc-shaped spring plate 11. A storage bin 7 is installed at the bottom of the valve body 1. A feeding pipe 13 is installed inside the valve body 1. One end of the feeding pipe 13 is located in the middle of the elastic sealing seat 10, and the other end is installed inside the storage bin 7. The two elastic sealing seats 10 are respectively fitted onto both sides of the outer wall of the ball core 8, and the diameter of the elastic sealing seats 10 is larger than the through hole in the middle of the ball core 8. The protrusion 9 is triangular in shape, with a height greater than the sides. The removal mechanism is described in detail below: In this embodiment, when the control valve is in the closed state, the operator rotates the ball core 8 via an external drive mechanism, causing the through holes on both sides of the ball core 8 to rotate to a position opposite to the elastic sealing seat 10. At this time, the internal flow channel of the ball core 8 is cut off, and the medium cannot continue to flow forward. During this process, the protrusion 9 on the lower side of the inner wall of the ball core 8 is triangular in shape, with its central height greater than the two sides, forming a guide surface that slopes from the middle to the sides. When the ball core 8 is closed, the liquid or viscous medium remaining inside the ball core 8 falls naturally to the surface of the protrusion 9 under the action of gravity. Due to the structural feature of the protrusion 9 being high in the middle and low on both sides, the medium is forced to flow to the sides of the ball core 8, thereby avoiding the accumulation of medium in the central region of the ball core 8.

[0023] The diverted medium continues to flow to both sides of the ball core 8 and enters the area of ​​the elastic sealing seat 10 located inside the valve body 1. The elastic sealing seat 10 is fitted against both sides of the outer wall of the ball core 8, and the diameter of its coverage area is larger than the through hole in the middle of the ball core 8, ensuring a reliable sealing contact between the ball core 8 and the elastic sealing seat 10 in the closed state. At the same time, the outer wall of the elastic sealing seat 10 is elastically supported by the arc-shaped spring plate 11 and the arc-shaped spring plate 12. The arc-shaped spring plate 11 and the arc-shaped spring plate 12 are arranged crosswise, and the arc-shaped spring plate 12 is located inside the arc-shaped spring plate 11. Together, they form an elastic pre-tightening structure, which keeps the elastic sealing seat 10 in close contact with the surface of the ball core 8 at all times. Even under conditions of medium pressure fluctuations or temperature changes, it can effectively prevent medium leakage from the interface between the ball core 8 and the elastic sealing seat 10.

[0024] At the center of the resilient sealing seat 10, there is an inlet end of a feed pipe 13. The other end of the feed pipe 13 is connected to the storage hopper 7 at the bottom of the valve body 1. When the retained medium is guided to the area of ​​the resilient sealing seat 10 by the protrusion 9, due to the sealing contact between the resilient sealing seat 10 and the ball core 8, the medium cannot leak outward and can only flow into the feed pipe 13 along the inner wall of the resilient sealing seat 10. Under the action of gravity and the fluidity of the medium itself, the retained material is smoothly guided into the storage hopper 7 through the feed pipe 13, thereby realizing the centralized collection and subsequent treatment of the medium.

[0025] Example 2 like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 8As shown, based on Embodiment 1, the flow channel control valve further includes a sealing mechanism disposed inside the valve body 1. The sealing mechanism includes a rubber ring 17 slidably disposed inside the valve body 1 and the valve cover 14. A sealing plate 19 is installed on the outer wall of the rubber ring 17 close to the valve cover 14, and an annular groove 15 for sliding of the rubber ring 17 is opened inside the valve cover 14. A limiting ring 18 is installed on the side of the outer wall of the rubber ring 17 away from the sealing plate 19, and the limiting ring 18 is slidably disposed inside the valve body 1. A sliding shaft 20 is installed inside the limiting ring 18, and a spring 21 is sleeved on the outer wall of the sliding shaft 20. The sliding shaft 20 is slidably disposed inside the valve body 1. One end of the spring 21 is installed inside the limiting ring 18, and the other end of the spring 21 is installed inside the valve body 1. The ball core 8 has a drive rod 3 mounted on its top, and the drive rod 3 is rotatably connected to the valve body 1 via a connecting seat 2. A handle 4 is mounted on the top of the drive rod 3, and a baffle 5 is mounted on the outer wall of the drive rod 3 between the connecting seat 2 and the handle 4. The baffle 5 is limited by bolts on both sides of the connecting seat 2. Two bases 6 are mounted on the bottom of the valve body 1, respectively located on both sides of the storage bin 7. A valve cover 14 is mounted on both ends of the valve body 1, and the valve body 1 and the valve cover 14 are connected by fixing bolts 16. The flow channel control valve is described in detail below: In this embodiment, the opening and closing of the control valve is achieved by manually or automatically driving the drive rod 3. The drive rod 3 is mounted on top of the ball core 8 and forms a sealed rotatable connection with the valve body 1 through the connecting seat 2. A sealing ring or packing may be installed inside the connecting seat 2 to prevent the medium from leaking into the external environment along the outer wall of the drive rod 3. A handle 4 is installed on the top of the drive rod 3. By rotating the handle 4, the operator can drive the drive rod 3 and the ball core 8 connected to it to rotate 90°, thereby opening or closing the valve.

[0026] A baffle 5 is installed on the outer wall of the drive rod 3, between the connecting seat 2 and the handle 4. Bolts or limiting structures are provided on both sides of the connecting seat 2 to mechanically limit the rotation angle of the baffle 5. When the handle 4 drives the drive rod 3 to rotate to the predetermined angle, the baffle 5 contacts the bolts on the connecting seat 2, preventing it from continuing to rotate. This ensures that the ball core 8 can accurately stop at the fully open or fully closed position each time, avoiding damage to the sealing surface or deviation of the flow channel due to excessive rotation.

[0027] Valve covers 14 are mounted on both ends of the valve body 1 via fixing bolts 16, forming a sealed connection between the valve covers 14 and the valve body 1. Inside the valve body 1 and valve covers 14, a sealing mechanism is provided to improve sealing performance. Specifically, a sealing plate 19 is mounted on the outer wall of the rubber ring 17 near the valve cover 14, and an annular groove 15 is provided inside the valve cover 14 for the rubber ring 17 to slide. When the valve cover 14 is pressed onto the valve body 1 by the fixing bolts 16, the rubber ring 17 slides towards the valve body 1 under the guidance of the annular groove 15, and the sealing plate 19 forms a tight contact with the end face of the valve body 1, thereby achieving a static seal between the valve body 1 and the valve cover 14.

[0028] A limiting ring 18 is installed on the outer wall of the rubber ring 17 away from the sealing plate 19. The limiting ring 18 is slidably disposed inside the valve body 1 to limit excessive deformation or displacement of the rubber ring 17. A sliding shaft 20 is installed inside the limiting ring 18, and a spring 21 is sleeved on the outer wall of the sliding shaft 20. The sliding shaft 20 is slidably disposed inside the valve body 1, and one end of the spring 21 is installed inside the limiting ring 18, and the other end is installed inside the valve body 1. During the tightening process of the valve cover 14, after the rubber ring 17 is subjected to pressure, the limiting ring 18 compresses the spring 21, and the spring 21 generates a reverse elastic force, pushing the rubber ring 17 and the sealing plate 19 on it to always be in contact with the sealing surface of the valve body 1 and the valve cover 14. Even if the tightening force decreases due to temperature changes, pressure fluctuations, or creep of the sealing material during long-term operation, the spring 21 can automatically compensate and maintain a stable sealing contact pressure, thereby preventing the medium from leaking from the connection between the valve body 1 and the valve cover 14.

[0029] In addition, two bases 6 are installed at the bottom of the valve body 1. The two bases 6 are respectively set on both sides of the storage bin 7 to support the entire control valve and fix it on the pipeline or equipment support to ensure the stability of the valve during operation.

[0030] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A non-retention flow channel control valve, comprising a valve body (1), characterized in that: The valve body (1) is rotatably provided with a ball core (8) in the middle, and a protrusion (9) is fixedly provided on the lower side of the inner wall of the ball core (8); the control valve also includes a retention mechanism provided inside the valve body (1); The retaining mechanism includes elastic sealing seats (10) installed on both sides inside the valve body (1), and arc-shaped spring plate one (11) and arc-shaped spring plate two (12) are installed inside the valve body (1) on both sides of the elastic sealing seat (10). The ends of the arc-shaped spring plate one (11) and the middle of the arc-shaped spring plate two (12) are installed on the outer wall of the elastic sealing seat (10). The arc-shaped spring plate two (12) and the arc-shaped spring plate one (11) are arranged crosswise, and the arc-shaped spring plate two (12) is located inside the arc-shaped spring plate one (11). A storage bin (7) is installed at the bottom of the valve body (1), and a feeding pipe (13) is provided inside the valve body (1). One end of the feeding pipe (13) is located in the middle of the elastic sealing seat (10), and the other end of the feeding pipe (13) is installed inside the storage bin (7).

2. The non-retention flow channel control valve according to claim 1, characterized in that, The two elastic sealing seats (10) are respectively attached to both sides of the outer wall of the ball core (8), and the diameter of the elastic sealing seat (10) is larger than the through hole in the middle of the ball core (8).

3. The non-retention type flow channel control valve according to claim 1, characterized in that, The protrusion (9) is triangular in shape, with the height in the middle greater than that on both sides.

4. The non-retention flow channel control valve according to claim 1, characterized in that, The ball core (8) is equipped with a drive rod (3) on top, and the drive rod (3) is rotatably connected to the valve body (1) through a connecting seat (2).

5. A non-retention flow channel control valve according to claim 4, characterized in that, A handle (4) is installed on the top of the drive rod (3), and a baffle (5) is also installed on the outer wall of the drive rod (3) between the connecting seat (2) and the handle (4), and the baffle (5) is limited by bolts on both sides of the connecting seat (2).

6. A non-retention flow channel control valve according to claim 5, characterized in that, The valve body (1) has two bases (6) installed at the bottom. The two bases (6) are respectively located on both sides of the storage bin (7), and valve covers (14) are installed at both ends of the valve body (1). The valve body (1) and the valve cover (14) are connected by fixing bolts (16).

7. A non-retention flow channel control valve according to claim 6, characterized in that, The control valve also includes a sealing mechanism disposed inside the valve body (1); The sealing mechanism includes a rubber ring (17) that is slidably disposed inside the valve body (1) and the valve cover (14). A sealing plate (19) is installed on the outer wall of the rubber ring (17) close to the valve cover (14), and an annular groove (15) for the rubber ring (17) to slide is provided inside the valve cover (14).

8. A non-retention flow channel control valve according to claim 7, characterized in that, A limiting ring (18) is installed on the outer wall of the rubber ring (17) away from the sealing plate (19), and the limiting ring (18) is slidably disposed inside the valve body (1).

9. A non-retention flow channel control valve according to claim 8, characterized in that, The limiting ring (18) has a sliding shaft (20) installed inside, and the outer wall of the sliding shaft (20) is fitted with a spring (21). The sliding shaft (20) is slidably disposed inside the valve body (1).

10. A non-retention flow channel control valve according to claim 9, characterized in that, One end of the spring (21) is installed inside the limiting ring (18), and the other end of the spring (21) is installed inside the valve body (1).

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