A silent check valve

Abstract

This utility model discloses a silent check valve, belonging to the field of valve technology. It includes a valve housing 1 and a valve housing 2, which together form a complete valve housing structure. A connecting assembly is provided inside the valve housing 2, and a valve disc is provided on one side of the connecting assembly. The valve disc is used to open and close the pipe opening inside the valve housing 2. A reset assembly is driven to one side of the connecting assembly, and the reset assembly is slidably disposed inside the valve housing 1. A sealing ring is provided on the outside of the connecting assembly. The valve disc is mounted on the connecting assembly, and when the medium flows inside the pipe, it can drive the connecting assembly to squeeze the reset assembly, causing the valve disc to open and allowing the medium to flow freely inside the pipe. When the medium flows in the opposite direction, the rebound action of the reset assembly can quickly close the pipe opening, achieving a unidirectional flow effect for the medium.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, specifically relating to a silent check valve. Background Technology

[0002] A check valve is a type of automatic valve that opens and closes automatically based on the flow of the medium itself to prevent backflow of the medium. Its main function is to prevent backflow of the medium.

[0003] According to the patent announcement number CN214274592U, a pipeline-type silent check valve is known prior art. Although this patent has the advantage of reducing noise when the valve disc is closed, the technical solution of this patent still has the following defects in actual use: In this patent, the valve disc is opened and closed by the movement of the moving frame driving the impact rod. This structure is complex. The complex transmission method causes corrosion of the transmission structure in the silent check valve during long-term use and makes it difficult to ensure its sealing. As a result, the opening and closing of the internal action of the silent check valve is slow. At the same time, the manufacturing cost of this silent check valve is also high, which is not conducive to its widespread use. Utility Model Content

[0004] The purpose of this invention is to provide a silent check valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a silent check valve, comprising a valve housing one and a valve housing two, wherein the valve housing one and the valve housing two together form a complete valve housing structure; The valve housing 2 is provided with a connecting assembly inside, and a valve disc is provided on one side of the connecting assembly. The valve disc is used to open and close the pipe opening inside the valve housing 2. A reset component is driven to one side of the connecting component. The reset component is slidably disposed inside the valve housing. A sealing ring is disposed on the outside of the connecting component. After the valve disc closes in the internal pipe opening of the valve housing, the sealing ring is located between the valve disc and the valve housing.

[0006] In a preferred embodiment, both valve housing 1 and valve housing 2 are provided with connecting flanges at their ends, and valve housing 1 and valve housing 2 are connected to the pipeline through the connecting flanges.

[0007] In a preferred embodiment, a threaded opening is provided inside one end of the valve housing one, and a threaded ring is provided on the outside of one end of the valve housing two, with the threaded ring threadedly inserted into the inside of the threaded opening; Several tool clips are provided on the outer walls of both valve housing 1 and valve housing 2.

[0008] In a preferred embodiment, the connecting assembly includes a core, which is a spherical structure. A threaded hole is provided at the center of one end of the core. A sealing groove is provided on the outer surface of the core. A sealing ring is fitted inside the sealing groove. A flow guide is fixedly connected to one end of the core. The flow guide is a backward-bent arc shape.

[0009] In a preferred embodiment, the reset assembly includes a connecting seat fixed inside one side of the core, and a guide rod is fixedly provided at one end of the connecting seat. A stabilizing frame is provided inside the valve housing, and a sleeve is fixedly installed at the center of the stabilizing frame. A spring is sleeved on the outside of the guide rod.

[0010] In a preferred embodiment, the sealing ring has a multi-layer composite structure, with an outer layer of wear-resistant rubber and an inner layer of porous sound-absorbing layer. The outer surface of the wear-resistant rubber layer is provided with a groove, and a self-lubricating coating is provided on the surface of the wear-resistant rubber layer.

[0011] In a preferred embodiment, the valve disc includes a threaded post that is threaded into a threaded hole, a steel frame is fixedly provided at the end of the threaded post, and a rubber head is fixedly provided on the outside of the steel frame.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This silent check valve is installed on the connecting assembly with a valve disc. When the medium flows inside the pipeline, the valve disc can drive the connecting assembly to squeeze the reset assembly, causing the valve disc to open and allowing the medium to flow freely inside the pipeline. When the medium flows in the opposite direction, the rebound action of the reset assembly can quickly close the pipeline interface, achieving the effect of unidirectional flow of the medium. This silent check valve uses a sealing ring composed of a wear-resistant rubber layer, a sound-absorbing layer, a sealing groove, and a self-lubricating coating. This improves the sealing ring's resistance to corrosion and enhances its sealing performance, while also achieving better noise reduction and silencing effects. It is suitable for use in highly quiet environments and is therefore suitable for widespread application. Attached Figure Description

[0013] Figure 1 This is a front perspective view of the structure of this utility model; Figure 2 This is a front sectional view of the structure of this utility model; Figure 3 This is a main sectional view of the structure of this utility model; Figure 4 This is an exploded view of the structure of this utility model; Figure 5 This is a front view of the valve disc of the present invention.

[0014] In the diagram: 1. Valve housing one; 11. Threaded port; 12. Threaded ring; 13. Tool block; 2. Valve housing two; 3. Connecting flange; 4. Connecting assembly; 41. Core; 42. Threaded hole; 43. Sealing groove; 44. Flow guide; 5. Reset assembly; 51. Connecting seat; 52. Guide rod; 53. Stabilizer; 54. Sleeve; 55. Spring; 6. Sealing ring; 61. Wear-resistant rubber layer; 62. Sound-absorbing layer; 63. Groove; 64. Self-lubricating coating; 7. Valve disc; 71. Rubber head; 72. Threaded column; 73. Steel frame. Detailed Implementation

[0015] The present invention will be further described below with reference to the embodiments.

[0016] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0017] Please see Figure 1 , Figure 2 and Figure 3 This utility model provides a silent check valve, including a valve body 1 and a valve body 2, which together form a complete valve body structure. Both valve body 1 and valve body 2 have connecting flanges 3 at their ends, and are connected to pipelines via these flanges. One end of valve body 1 has a threaded opening 11, and one end of valve body 2 has a threaded ring 12 on its outer side. The threaded ring 12 is threaded into the threaded opening 11. Several tool clamps 13 are provided on the outer walls of both valve body 1 and valve body 2, allowing for easy assembly and disassembly of valve body 1 and valve body 2 by using a dedicated tool to clamp the tool clamps 13.

[0018] In this embodiment, valve housing 1 and valve housing 2 are connected to the pipeline through connecting flange 3, allowing the medium to flow inside. The threaded ring 12 is threaded into the threaded opening 11, which facilitates quick disassembly and assembly of valve housing 1 and valve housing 2, and enables maintenance and replacement of their internal components.

[0019] Please see Figure 2 , Figure 3 and Figure 4 The valve body 2 has a connecting component 4 inside. The connecting component 4 includes a core 41, which is a spherical structure. A threaded hole 42 is provided at the center of one end of the core 41. A sealing groove 43 is provided on the outer surface of the core 41. A sealing ring 6 is fitted inside the sealing groove 43. A flow guide 44 is fixedly connected to one end of the core 41. The flow guide 44 is an arc-shaped surface that bends backward.

[0020] In this embodiment, the spherical core 41 is used to guide the flow along the outer surface of the core 41 during the subsequent flow. Since the inside of the valve shell is an inner arc surface, the flow that passes through the core 41 converges to the rear side and enters the interior of the valve shell 1. In the case of partial backflow in the flow guide shroud 44, such as when the medium flows backward, the speed at which the reset assembly 5 closes the valve disc 7 and the sealing ring 6 is improved.

[0021] Please see Figure 2 , Figure 3 and Figure 4 A valve disc 7 is provided on one side of the connecting component 4. The valve disc 7 is used to open and close the pipe opening inside the valve body 2. The valve disc 7 includes a threaded post 72 that is threaded into the threaded hole 42. A steel frame 73 is fixedly provided at the end of the threaded post 72. The steel frame 73 improves its strength and makes the threaded post 72 more stably installed inside the threaded hole 42, thus achieving stable installation of the valve disc 7. A rubber head 71 is fixedly provided on the outside of the steel frame 73.

[0022] In this embodiment, the rubber head 71 is made of nitrile rubber. By adding damping fillers (such as carbon black, graphite, etc.), the shock absorption performance is improved, avoiding the impact of the medium inside the valve body 2 on it, and improving its service life.

[0023] Please see Figure 2 , Figure 3 and Figure 4 A reset component 5 is connected to one side of the connecting component 4. The reset component 5 is slidably disposed inside the valve housing 1. The reset component 5 includes a connecting seat 51 fixed inside one side of the core 41, and a guide rod 52 is fixedly disposed at one end of the connecting seat 51. A stabilizing frame 53 is disposed inside the valve housing 1. A sleeve 54 is fixedly installed at the center of the stabilizing frame 53. A spring 55 is sleeved on the outside of the guide rod 52.

[0024] In this embodiment, the guide rod 52 slides inside the sleeve 54. When the medium inside the valve housing 2 is pressurized, the connecting component 4 will drive the connecting seat 51 to move synchronously. At the same time, the guide rod 52 slides inside the sleeve 54. At this time, the spring 55 is compressed. Due to the displacement of the valve disc 7, the sealing ring 6 is disengaged from the inner wall of the valve housing 2, thereby opening the pipe opening.

[0025] Please see Figure 4 and Figure 5 A sealing ring 6 is provided on the outside of the connecting component 4. After the valve disc 7 is closed in the internal pipe opening of the valve body 1, the sealing ring 6 is located between the valve disc 7 and the valve body 1. The sealing ring 6 has a multi-layer composite structure. The outer layer of the sealing ring 6 is a wear-resistant rubber layer 61, and the inner layer is a porous sound-absorbing layer 62. The outer surface of the wear-resistant rubber layer 61 is provided with a groove 63, and a self-lubricating coating 64 is provided on the surface of the wear-resistant rubber layer 61.

[0026] In this embodiment, the sound-absorbing layer 62 is made of porous silicone or aluminum foam, which provides better sealing and noise reduction. The wear-resistant rubber layer 61, such as nitrile rubber, avoids rapid wear caused by repeated opening and closing. The groove 63 is a wavy structure or multiple parallel grooves, which not only provides sealing but also disperses pressure and reduces high-frequency vibration and pile foundation. The surface of the self-lubricating coating 64 is coated with polytetrafluoroethylene to reduce friction noise. The noise reduction technology reduces noise by ≥15dB (compared to ordinary rubber rings) and extends service life by more than 30%.

[0027] The working principle and usage process of this utility model are as follows: First, the operator inserts the reset component 5 into the inside of the valve body 1. Specifically, the guide rod 52 is inserted into the inside of the sleeve 54, so that the connecting seat 51 is fixedly connected to one end of the core 41. The sealing ring 6 is sleeved in the sealing groove 43 outside the core 41. Finally, the valve disc 7 is threaded into the threaded hole 42 at one end of the core 41 through the threaded post 72, thereby realizing the fixed installation of the valve disc 7. After the above operation steps are completed, the operator then connects and fixes the valve housing 2 to the valve housing 1 through the engagement of the threaded ring 12 and the threaded opening 11, forming a sealed cavity structure. When the medium flows from valve body 2 to valve body 1, the pressure of the medium inside valve body 2 increases, which can squeeze valve disc 7 and cause connecting component 4 to drive reset component 5 to compress. At this time, valve disc 7 moves to open the pipe opening at valve body 2, allowing the medium to flow into the interior of valve body 1, thus realizing the delivery of the medium. When the medium inside valve body 1 flows back to valve body 2, under the rebound action of reset component 5, core 41 can be inserted into the inside of the pipe opening, and valve disc 7 is inserted into the inside of the pipe opening, thus closing the pipe opening and realizing unidirectional flow control of the medium.

[0028] 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 of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A silent check valve comprising a valve housing one (1) and a valve housing two (2), characterized in that: The valve housing one (1) and valve housing two (2) together form a complete valve housing structure; The valve housing 2 (2) is provided with a connecting component (4) inside, and a valve disc (7) is provided on one side of the connecting component (4). The valve disc (7) is used to open and close the pipe opening inside the valve housing 2 (2). A reset component (5) is connected to one side of the connecting component (4). The reset component (5) is slidably disposed inside the valve housing (1). A sealing ring (6) is disposed on the outside of the connecting component (4). After the valve disc (7) closes inside the pipe opening of the valve housing (1), the sealing ring (6) is located between the valve disc (7) and the valve housing (1).

2. A silent check valve according to claim 1, characterized in that: Both valve housing 1 (1) and valve housing 2 (2) are provided with connecting flanges (3) at their ends, and valve housing 1 (1) and valve housing 2 (2) are connected to the pipeline through the connecting flanges (3).

3. A silent check valve according to claim 1, wherein: One end of the valve housing (1) is provided with a threaded opening (11), and one end of the valve housing (2) is provided with a threaded ring (12), which is threaded into the inside of the threaded opening (11). Several tool blocks (13) are provided on the outer walls of both valve housing 1 (1) and valve housing 2 (2).

4. A silent check valve according to claim 1, wherein: The connecting component (4) includes a core (41), which is a spherical structure. A threaded hole (42) is provided at the center of one end of the core (41). A sealing groove (43) is provided on the outer surface of the core (41). A sealing ring (6) is fitted inside the sealing groove (43). A flow guide (44) is fixedly connected to one end of the core (41). The flow guide (44) is an arc-shaped surface that bends backward.

5. A silent check valve according to claim 4, wherein: The reset assembly (5) includes a connecting seat (51) fixed inside one side of the core (41), a guide rod (52) fixedly provided at one end of the connecting seat (51), a stabilizing frame (53) provided inside the valve housing (1), a sleeve (54) fixedly installed at the center of the stabilizing frame (53), and a spring (55) sleeved on the outside of the guide rod (52).

6. A silent check valve according to claim 1, wherein: The sealing ring (6) is a multi-layer composite structure. The outer layer of the sealing ring (6) is a wear-resistant rubber layer (61), and the inner layer is a porous sound-absorbing layer (62). The outer surface of the wear-resistant rubber layer (61) is provided with a groove (63), and a self-lubricating coating (64) is provided on the surface of the wear-resistant rubber layer (61).

7. A silent check valve according to claim 4, wherein: The valve disc (7) includes a threaded post (72) that is threaded into the threaded hole (42). A steel frame (73) is fixedly provided at the end of the threaded post (72), and a rubber head (71) is fixedly provided on the outside of the steel frame (73).

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