Duckbill valve

Abstract

The utility model discloses a duckbill valve which comprises a valve body, the valve body comprises a valve seat and a valve nozzle arranged on the valve seat, the valve nozzle is sequentially provided with a connecting section, a clamping matching section and a liquid output conical section from the connecting position of the valve seat to the tail end in the axial direction, and a fluid channel is formed in the valve nozzle; the lower end face of the valve seat is provided with a liquid input port communicated with the fluid channel, and the end, away from the valve seat, of the liquid output conical section is provided with a liquid output channel communicated with the fluid channel. An annular sealing protrusion, an annular groove and a clamping step matched with the clamping matching section of the valve nozzle are sequentially arranged on the upper end face of the valve seat from outside to inside in the radial direction.

Description

TECHNICAL FIELD

[0001] The utility model relates to a duckbill valve belongs to valve technical field, can be applicable to the scrubber on. BACKGROUND

[0002] At present, in liquid delivery system, duckbill valve is widely used in fluid control, its main feature is that can rely on the elastic structure of itself to open and close automatically, prevents liquid backflow. After searching the prior art, it is found that the Chinese patent with publication number CN222502810U discloses a new duckbill valve, in actual use, it is found that, after installation, there is lack of reliable fixing, and loose or even falling off may occur, thereby affecting the stability and sealing property of liquid delivery. SUMMARY

[0003] The utility model solves the technical problem that the prior art is overcome, provides a duckbill valve, it can be fixed stably on the delivery pipeline, avoids the liquid leakage problem caused by loose or falling off, improves the safety and durability of use.

[0004] In order to solve the above technical problem, the technical scheme of the utility model is as follows: a duckbill valve, comprising:

[0005] Valve body, the valve body includes valve seat and the valve mouth that sets up on the valve seat, the valve mouth is sequentially equipped with connecting section, clamping cooperation section and liquid output cone section along the axial direction from the junction of valve seat to the end, the valve mouth inside is formed with fluid passage;

[0006] Wherein, the lower end surface of the valve seat is provided with liquid input port communicated with the fluid passage, the liquid output cone section is provided with liquid output channel communicated with the fluid passage away from the valve seat, the upper end surface of the valve seat is sequentially provided with annular sealing protrusion, annular groove and clamping step matched with the clamping cooperation section of the valve mouth along the radial direction from outside to inside.

[0007] Further, the liquid output channel of the valve mouth is flat and long opening structure.

[0008] Further, the junction between the liquid input port of the lower end surface of the valve seat and the inner wall of the valve mouth is provided with arc transition.

[0009] Further, the valve seat and the valve mouth are integrally formed.

[0010] Further, the fluid passage of the valve mouth includes upper section, middle section and lower section.

[0011] The upper section corresponds to the liquid output cone section, the middle section corresponds to the clamping fitting section, and the lower section corresponds to the connecting section.

[0012] Further, the upper section of the fluid passage of the valve nozzle is an equal-thickness structure.

[0013] Further, the wall thickness of the upper section of the fluid passage of the valve nozzle is smaller than that of the lower section.

[0014] Further, an arc-shaped transition corner is arranged at the junction of the outer peripheral surface of the valve nozzle and the lower end surface of the valve nozzle.

[0015] Further, the valve seat and the valve nozzle are both made of methyl vinyl silicone rubber material.

[0016] With the above technical scheme, the utility model has the following beneficial effects:

[0017] In the utility model, the clamping fitting section of the valve nozzle cooperates with the clamping step on the valve seat, so that the valve nozzle can be stably clamped on the pipeline, thereby effectively avoiding loosening, falling off or leakage of the valve nozzle, and improving the stability and sealing performance of installation. In addition, the liquid output passage of the valve nozzle adopts a flat and narrow opening structure, so that the fluid discharge is more uniform and stable. At the same time, the arc-shaped transition structure is arranged between the liquid input port of the lower end surface of the valve seat and the inner wall of the valve nozzle, which effectively reduces the resistance of the fluid when flowing through the fluid passage, improves the flow efficiency, and reduces the energy consumption.

[0018] In summary, the utility model improves the installation stability and sealing performance of the valve body, enhances the durability, optimizes the liquid flow effect, and can better meet the requirements of high efficiency, stability and safety of the valve in the liquid conveying system. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic view of the duckbill valve according to the utility model;

[0020] Figure 2 It is a sectional view of the duckbill valve according to the utility model. DETAILED DESCRIPTION

[0021] In order to make the content of the utility model easier to be clearly understood, the utility model will be further described in detail below according to specific embodiments and in combination with the drawings.

[0022] As shown in the drawings, a duckbill valve comprises: Figures 1-2

[0023] ​The valve body comprises a valve seat 11 and a valve spout 12 arranged on the valve seat 11; the valve spout 12 is sequentially provided with a connecting section 121, a clamping matching section 122 and a liquid output cone section 123 from the connecting section to the end of the valve seat 11 in the axial direction, and a fluid passage 13 is formed in the valve spout 12;

[0024] The lower end surface of the valve seat 11 is provided with a liquid inlet port 14 in communication with the fluid passage 13, the liquid output cone section 123 is provided with a liquid outlet passage 15 in communication with the fluid passage 13 at the end away from the valve seat 11, and the upper end surface of the valve seat 11 is sequentially provided with an annular sealing protrusion 16, an annular groove 17 and a clamping step 18 matched with the clamping matching section 122 of the valve spout 12 in the radial direction from outside to inside.

[0025] In the embodiment, as shown in Figures 1-2 , the liquid enters from the liquid inlet port 14 of the valve seat 11, passes through the fluid passage 13 in the valve spout 12 and is finally discharged from the liquid outlet passage 15. The clamping matching section 122 is matched with the clamping step 18 on the valve seat 11 to ensure stable and reliable installation of the valve body; the annular sealing protrusion 16 on the upper end surface of the valve seat 11 is matched with the external connecting pipeline to realize sealing.

[0026] Specifically, as shown in Figures 1-2 , the liquid outlet passage 15 of the valve spout 12 is a flat and long opening structure.

[0027] In the embodiment, as shown in Figures 1-2 , when the liquid passes through the fluid passage 13, the elastic material of the valve spout 12 allows the liquid outlet passage 15 to slightly open under the action of pressure, and the outlet passage 15 will automatically close after the liquid is discharged due to elasticity, preventing external liquid or air from flowing back, thereby realizing the function of a one-way valve.

[0028] Specifically, as shown in Figures 1-2 , an arc-shaped transition 19 is arranged at the junction between the liquid inlet port 14 of the lower end surface of the valve seat 11 and the inner wall of the valve spout 12.

[0029] Specifically, as shown in Figures 1-2 , an arc-shaped transition angle is arranged at the junction between the outer peripheral surface of the valve spout 12 and the lower end surface of the valve spout 12.

[0030] In the embodiment, as shown in Figures 1-2 , the arc-shaped transition 19 at the junction between the liquid inlet port 14 of the lower end surface of the valve seat 11 and the inner wall of the valve spout 12 makes the liquid flow more smoothly when entering the fluid passage 13 from the liquid inlet port 14, reducing the resistance generated when the liquid changes direction.

[0031] Specifically, as shown in Figures 1-2 , the valve seat 11 and the valve spout 12 are integrally formed.

[0032] Specifically, as shown in Figures 1-2 The fluid passage 13 of the valve nozzle 12 includes an upper section, a middle section and a lower section.

[0033] The upper section corresponds to the liquid output cone section 123, the middle section corresponds to the clamping fitting section 122, and the lower section corresponds to the connecting section 121. The upper section is a conical structure matching the shape of the liquid output cone section 123, and the middle section and the lower section are connected cylindrical structures.

[0034] Specifically, as shown in Figures 1-2 The upper section of the fluid passage 13 of the valve nozzle 12 is an equal-thickness structure.

[0035] Specifically, as shown in Figures 1-2 The wall thickness of the upper section of the fluid passage 13 of the valve nozzle 12 is smaller than that of the lower section.

[0036] In this embodiment, as shown in Figures 1-2 The upper section of the fluid passage 13 of the valve nozzle 12 is an equal-thickness structure, ensuring that the liquid is subjected to uniform elastic force when passing through the upper section, allowing the liquid output passage 15 to be uniformly opened and closed under pressure, thereby ensuring the sealing performance and opening characteristics of the valve. The wall thickness of the upper section of the fluid passage 13 of the valve nozzle 12 is smaller than that of the lower section, allowing the upper section to have relatively high elasticity, facilitating the opening of the liquid output passage 15 under pressure; the thicker wall of the lower section provides the necessary structural strength, ensuring that the valve nozzle 12 maintains a stable form in the working state.

[0037] Specifically, as shown in Figure 1 The valve seat 11 and the valve nozzle 12 are both made of methyl vinyl silicone rubber material.

[0038] In this embodiment, as shown in Figure 1 The valve seat 11 and the valve nozzle 12 are both made of methyl vinyl silicone rubber material, which provides sufficient elasticity to achieve the opening and closing functions of the valve nozzle 12.

[0039] The hardness of the silicone rubber is 60±5 shore A, the color is natural, the wall thickness of the upper section of the fluid passage 13 is 0.5 mm, the inner diameter of the cylindrical structure of the middle section and the lower section is 4.9 mm, the outer diameter of the connecting section 121 of the valve nozzle 12 is 6.9 mm, the wall thickness of the connecting section 121 is 1 mm, the outer peripheral diameter of the valve seat 11 is 17.11 mm, and the maximum diameter of the clamping fitting section 122 is 7.9 mm. The duckbill valve can be used on a scrubber.

[0040] The above-described specific embodiments further specifically describe the technical problems, technical solutions and beneficial effects solved by the present application, and it should be understood that the above-described specific embodiments are merely specific embodiments of the present application and are not used to limit the present application, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A duckbill valve characterized by, The duckbill valve comprises a valve body, a valve seat (11) and a valve nozzle (12) arranged on the valve seat (11), the valve nozzle (12) is sequentially provided with a connecting section (121), a clamping fitting section (122) and a liquid output cone section (123) from the junction to the end of the valve seat (11) in the axial direction, and a fluid passage (13) is formed in the valve nozzle (12). The lower end surface of the valve seat (11) is provided with a liquid inlet port (14) in communication with the fluid passage (13), the end of the liquid output cone section (123) away from the valve seat (11) is provided with a liquid output passage (15) in communication with the fluid passage (13), and the upper end surface of the valve seat (11) is sequentially provided with an annular sealing protrusion (16), an annular groove (17) and a clamping step (18) matched with the clamping fitting section (122) of the valve nozzle (12) in the radial direction from outside to inside.

2. The duckbill valve according to claim 1, wherein the liquid output passage (15) of the valve nozzle (12) is a flat and long opening structure.

3. The duckbill valve according to claim 1, wherein an arc transition (19) is arranged at the junction between the liquid inlet port (14) of the lower end surface of the valve seat (11) and the inner wall of the valve nozzle (12).

4. The duckbill valve according to claim 1, wherein the valve seat (11) and the valve nozzle (12) are integrally formed.

5. The duckbill valve according to claim 1, wherein the fluid passage (13) of the valve nozzle (12) comprises an upper section, a middle section and a lower section; wherein the upper section corresponds to the liquid output cone section (123), the middle section corresponds to the clamping fitting section (122), and the lower section corresponds to the connecting section (121), the upper section is a tapered structure matched with the shape of the liquid output cone section (123), and the middle section and the lower section are connected in a cylindrical structure.

6. The duckbill valve according to claim 5, wherein the upper section of the fluid passage (13) of the valve nozzle (12) is an equal-thickness structure.

7. The duckbill valve according to claim 5, wherein the wall thickness of the upper section of the fluid passage (13) of the valve nozzle (12) is smaller than the wall thickness of the lower section.

8. The duckbill valve according to claim 1, wherein an arc transition corner is arranged at the junction between the outer peripheral surface of the valve nozzle (12) and the lower end surface of the valve nozzle (12).

9. The duckbill valve according to claim 1, wherein the valve seat (11) and the valve nozzle (12) are both made of methyl vinyl silicone rubber material. ​ ​ ​ ​ ​ ​ ​ ​ ​

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