Sealing ring, sheet type eccentric shaft valve element and plastic valve

Abstract

The utility model belongs to the technical field of valves, and discloses a sealing ring, a sheet type eccentric shaft valve core and a plastic valve, the sealing ring comprises a sealing ring body and a plurality of anti-drop structures integrally formed on the sealing ring body; the multiple anti-disengaging structures are distributed on the inner side face of the sealing ring body and used for achieving tight fixing of the sealing ring body and a valve element. The plate type eccentric shaft valve element comprises a valve element body and the sealing ring fixedly arranged on the sealing face of the valve element body. The plastic valve comprises a valve body, a valve element assembled in the valve body and a valve deck assembled on the valve body. The valve element is the sheet type eccentric shaft valve element. The sealing ring and the valve element are tightly fixed through the anti-disengaging structure, compared with an assembling mode of pressing and buckling through a gland or an interference assembling mode in the prior art, the anti-disengaging structure can prevent the sealing ring from disengaging, shifting or twisting, and therefore the conditions of sealing failure and valve leakage are avoided.

Description

Technical Field

[0001] This utility model relates to a valve, specifically a sealing ring, a plate-type eccentric shaft valve core, and a plastic valve. Background Technology

[0002] Chinese utility model patent CN222848728U discloses a plate-type eccentric shaft valve core structure for plastic valves. Its biggest improvement lies in the use of an eccentric shaft plate structure for the valve core, which, compared to a ball valve core, uses less material, is lighter, and provides better sealing. However, this plate-type eccentric shaft valve core structure has the following drawbacks:

[0003] Because the sealing ring in this type of eccentric shaft valve core structure is pressed onto the sealing surface of the valve core by a gland, when the water pressure is high, the gland may detach from the valve core, causing the sealing ring to fall off, resulting in sealing failure and valve leakage. Utility Model Content

[0004] This invention provides a sealing ring, a plate-type eccentric shaft valve core, and a plastic valve, aiming to solve the problem of sealing failure caused by the detachment of the sealing ring in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a sealing ring, comprising a sealing ring body and a plurality of anti-detachment structures integrally formed on the sealing ring body; the plurality of anti-detachment structures are distributed on the inner side of the sealing ring body to achieve tight fixation between the sealing ring body and the valve core.

[0006] As a limitation of this utility model, the outer surface of the sealing ring body is an arc surface.

[0007] As another limitation of this utility model, the anti-detachment structure includes a column and a stop; one end of the column is connected to the inner side of the sealing ring body, and the other end of the column is connected to the stop.

[0008] As a further limitation of this utility model, the stop block is cylindrical, and the diameter of the stop block is larger than the diameter of the column.

[0009] As another limitation of this utility model, the upper part of the inner side of the sealing ring body is provided with a strip-shaped positioning protrusion.

[0010] This utility model also discloses a plate-type eccentric shaft valve core, including a valve core body, wherein a sealing cavity is provided on the sealing surface of the valve core body; the sealing cavity is arranged around the edge of the sealing surface of the valve core body.

[0011] The valve core body is provided with multiple anti-detachment holes that communicate with the sealing cavity;

[0012] It also includes the sealing rings as described above; the sealing ring body is fixed in the sealing cavity, and the anti-detachment structures are fixed in the anti-detachment holes one by one.

[0013] As a limitation of this utility model, the sealing ring is fixed on the valve core body by liquid injection molding.

[0014] As a further limitation of this utility model, the valve core body is also provided with an overflow groove that communicates with the sealing cavity.

[0015] This utility model also discloses a plastic valve, including a valve body, a valve core assembled in the valve body, and a valve cover assembled on the valve body; the valve stem of the valve core extends from the valve cover to the outside of the valve body; the valve core is a plate-type eccentric shaft valve core as described above;

[0016] The sealing surface of the plate-type eccentric shaft valve core is larger than the diameter of a single channel on the valve body.

[0017] The outer surface of the sealing ring of the plate-type eccentric shaft valve core contacts the inner wall of the valve body cavity, and the sealing ring is larger than the diameter of a single channel on the valve body.

[0018] As a limitation of this utility model, the valve body is a three-way valve body or a two-way valve body.

[0019] By adopting the above-mentioned technical solution, the beneficial effects achieved by this utility model compared with the prior art are as follows:

[0020] (1) This utility model innovatively integrates an anti-detachment structure on the sealing ring, and uses the anti-detachment structure to achieve tight fixation between the sealing ring and the valve core. Compared with the assembly method of using the pressure cap buckle or interference fit method in the prior art, this utility model can prevent the sealing ring from falling off, shifting or twisting, thereby avoiding sealing failure and valve leakage.

[0021] (2) In this invention, the sealing ring is integrated onto the valve core body through liquid injection molding. The molded sealing ring provides more uniform and controllable compression force and contact pressure on the sealing surface of the valve core body, creating a zero-leakage interface and improving sealing performance. In addition, after liquid injection molding, the sealing ring cannot detach, shift, or twist from the valve core body, exhibiting excellent vibration and impact resistance, and avoiding scratches, cuts, or excessive stretching that may occur during manual installation. This invention also eliminates the need for separate sealing ring procurement, inventory management, assembly processes, and labor costs, thereby reducing production costs and enhancing product market competitiveness. Attached Figure Description

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 This is a schematic diagram of the sealing ring structure in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the sealing ring from another angle in an embodiment of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the plate-type eccentric shaft valve core in an embodiment of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the plate-type eccentric shaft valve core from another angle in an embodiment of this utility model;

[0027] Figure 5 This is a schematic diagram of the disassembled structure of the plate-type eccentric shaft valve core in an embodiment of this utility model;

[0028] Figure 6 This is a schematic diagram of the valve core body in an embodiment of the present utility model;

[0029] Figure 7 This is a schematic diagram of the disassembled structure of the plastic valve in an embodiment of the present invention;

[0030] In the diagram: 1. Sealing ring body; 2. Anti-detachment structure; 3. Column; 4. Stop block; 5. Positioning protrusion; 6. Valve core body; 7. Sealing ring; 8. Positioning column; 9. Valve stem; 10. Sealing cavity; 11. Anti-detachment hole; 12. Overflow groove; 13. Positioning groove; 14. Three-way valve body; 15. Valve cover. Detailed Implementation

[0031] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0032] This embodiment discloses a sealing ring 7, which can form an effective seal between the valve body and the valve core. For example... Figure 1 and Figure 2 As shown, the sealing ring 7 disclosed in this embodiment includes a sealing ring body 1 and a plurality of anti-detachment structures 2 integrally formed on the sealing ring body 1. The sealing ring body 1 is a frame-shaped structure, adapted to the sealing cavity 10 of the valve core body 6 described below. In this embodiment, the side of the sealing ring body 1 that contacts the valve body is defined as the outer side, and the side of the sealing ring body 1 that contacts the valve core is defined as the inner side. The outer side of the sealing ring body 1 is an arc surface. When it contacts and seals with the valve body, the arc surface can provide a uniform and gradually increasing contact pressure, achieving a good dynamic seal.

[0033] The anti-detachment structure 2 is evenly distributed on the inner surface of the sealing ring body 1, used to ensure a tight fixation of the sealing ring body 1 to the valve core, preventing it from falling off during use. Figure 2 As shown, in this embodiment, the anti-detachment structures 2 are distributed on both sides and the bottom of the inner side of the sealing ring body 1. Each anti-detachment structure 2 includes an integrally formed column 3 and a stop 4. One end of the column 3 is connected to the inner side of the sealing ring body 1, and the other end of the column 3 is connected to the stop 4. In this embodiment, six anti-detachment structures 2 are provided on both sides of the inner side of the sealing ring body 1, and two anti-detachment structures 2 are provided at the bottom of the inner side of the sealing ring body 1.

[0034] The stop block 4 is cylindrical, and its diameter is larger than that of the cylinder 3. The stop block 4 can prevent the cylinder 3 and the sealing ring body 1 from detaching from the valve core body 6. Of course, depending on the actual situation, the stop block 4 can also be other shapes that can achieve the anti-detachment effect, such as a boss, a lug, etc.

[0035] To prevent displacement or twisting of the sealing ring body 1, in this embodiment, a strip-shaped positioning protrusion 5 is also provided on the upper part of the inner side of the sealing ring body 1, specifically as follows: Figure 2 As shown.

[0036] This embodiment also discloses a plate-type eccentric shaft valve core, such as Figures 3 to 5 As shown, the disc-type eccentric shaft valve core disclosed in this embodiment includes a valve core body 6 and a sealing ring 7 fixed on the valve core body 6. The structure of the valve core body 6 is basically the same as the valve core structure disclosed in the utility model patent with authorization announcement number CN222848728U, both being disc-type structures with a positioning post 8 at the bottom and a valve stem 9 at the top. The difference lies in: Figure 6 As shown, in this embodiment, the valve core body 6 has a full-circle sealing cavity 10 on its sealing surface. The sealing cavity 10 is distributed along the edge of the sealing surface of the valve core body 6, and the valve core body 6 has a plurality of anti-disengagement holes 11 communicating with the sealing cavity 10. The anti-disengagement hole 11 includes a first hole adapted to the above-mentioned column 3 and a second hole adapted to the above-mentioned stop 4.

[0037] It should be noted that in this embodiment, the side of the valve core body 6 that is used to contact the inner wall of the cavity of the valve body is defined as the sealing surface.

[0038] The sealing ring body 1 of the aforementioned sealing ring 7 is fixed in the sealing cavity 10, and the anti-detachment structure 2 is fixed in the anti-detachment hole 11 in a corresponding manner.

[0039] In this embodiment, the sealing ring 7 is directly molded onto the valve core body 6 using a liquid injection molding process to fix the sealing ring 7 onto the valve core body 6. Figure 5 and Figure 6 As shown, the bottom of the sealing surface of the valve core body 6 is also provided with an overflow groove 12 that communicates with the sealing cavity 10, and the top of the sealing surface of the valve core body 6 is provided with a strip-shaped positioning groove 13, which is adapted to the positioning protrusion 5 on the sealing ring 7.

[0040] This embodiment also discloses a plastic valve, which has a structure substantially the same as the plastic valve disclosed in utility model patent with authorization announcement number CN222848728U. For example... Figure 7 As shown, the valve includes a three-way valve body 14, a valve core assembled in the three-way valve body 14, and a valve cover 15 assembled on the three-way valve body 14. The valve stem 9 of the valve core extends from the valve cover 15 to the outside of the three-way valve body 14. The difference lies in that the plastic valve disclosed in this embodiment uses a plate-type eccentric shaft valve core as described above. The sealing surface of the plate-type eccentric shaft valve core is larger than the diameter of a single channel on the three-way valve body 14. The outer surface of the sealing ring 7 on the plate-type eccentric shaft valve core contacts the inner wall of the cavity of the three-way valve body 14, and the sealing ring 7 is larger than the diameter of a single channel on the three-way valve body 14. When the sealing surface of the plate-type eccentric shaft valve core is rotated to align with the port of a certain channel of the three-way valve body 14, the plate-type eccentric shaft valve core blocks that channel with the cooperation of the sealing ring 7.

[0041] It should be noted that, depending on actual needs, the above-mentioned three-way valve body 14 can also be replaced with a two-way valve body.

[0042] It should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealing ring, characterized in that: It includes a sealing ring body and multiple anti-detachment structures integrally formed on the sealing ring body; the multiple anti-detachment structures are distributed on the inner side of the sealing ring body to achieve tight fixation between the sealing ring body and the valve core.

2. The sealing ring according to claim 1, characterized in that: The outer surface of the sealing ring body is an arc surface.

3. The sealing ring according to claim 1 or 2, characterized in that: The anti-detachment structure includes a column and a stop; one end of the column is connected to the inner side of the sealing ring body, and the other end of the column is connected to the stop.

4. The sealing ring according to claim 3, characterized in that: The stop block is cylindrical, and the diameter of the stop block is larger than the diameter of the cylinder.

5. The sealing ring according to any one of claims 1, 2, and 4, characterized in that: The upper part of the inner side of the sealing ring body is provided with a strip-shaped positioning protrusion.

6. A plate-type eccentric shaft valve core, comprising a valve core body, characterized in that: The valve core body has a sealing cavity on its sealing surface; the sealing cavity is arranged around the edge of the valve core body's sealing surface. The valve core body is provided with multiple anti-detachment holes that communicate with the sealing cavity; It also includes a sealing ring as described in any one of claims 1-5; the sealing ring body is fixed in the sealing cavity, and the anti-detachment structure is fixed in the anti-detachment hole in a corresponding manner.

7. The plate-type eccentric shaft valve core according to claim 6, characterized in that: The sealing ring is fixed to the valve core body by liquid injection molding.

8. The plate-type eccentric shaft valve core according to claim 7, characterized in that: The valve core body is also provided with an overflow groove that communicates with the sealing cavity.

9. A plastic valve, comprising a valve body, a valve core assembled in the valve body, and a valve cover assembled on the valve body; the valve stem of the valve core extends from the valve cover to the outside of the valve body; characterized in that: The valve core is a plate-type eccentric shaft valve core as described in any one of claims 6-8; The sealing surface of the plate-type eccentric shaft valve core is larger than the diameter of a single channel on the valve body. The outer surface of the sealing ring of the plate-type eccentric shaft valve core contacts the inner wall of the valve body cavity, and the sealing ring is larger than the diameter of a single channel on the valve body.

10. The plastic valve according to claim 9, characterized in that: The valve body is a three-way valve body or a two-way valve body.

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