An improved valve seat seal ring

Abstract

This utility model discloses an improved valve seat sealing ring, which includes a polygonal sealing ring placed inside the valve cavity of a valve seat support ring. The polygonal sealing ring includes a triangular sealing ring and a quadrilateral sealing ring. The triangular sealing ring and the quadrilateral sealing ring are bonded together so that the contact end 'a' of the quadrilateral sealing ring and the triangular sealing ring is completely placed inside the valve cavity of the valve seat support ring. This utility model divides the originally monolithic polygonal sealing ring into a double structure of a quadrilateral sealing ring and a triangular sealing ring. The harder quadrilateral sealing ring is completely placed inside the valve cavity of the valve seat support ring, while the softer triangular sealing ring is exposed to cooperate with the ball valve to achieve a seal. In this way, when the valve cavity has high and low temperatures and high and low air pressures, the double-structure polygonal sealing ring is not easily deformed and maintains its installation position without displacement, resulting in a more stable and better sealing effect under extreme temperature differences of the valve seat.

Description

Technical Field

[0001] This utility model relates to the field of sealing ring technology, and in particular to an improved valve seat sealing ring. Background Technology

[0002] Under high pressure, gas may rapidly expand or compress due to the pressure generated by extreme temperatures, and before it can escape through the vent on the valve seat, it may squeeze out the rubber sealing ring, creating pressure on it. Furthermore, under low pressure, if the ball valve suddenly presses against the valve seat and sealing ring, the plastic valve seat may not be able to withstand the pressure, causing the rubber sealing ring to be squeezed. Under the combined effects of friction and pressure, the sealing ring may suffer shear damage and displacement, gradually losing its sealing function. Utility Model Content

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0004] To address the aforementioned problems, this utility model provides the following technical solution:

[0005] An improved valve seat sealing ring includes a polygonal sealing ring placed inside the valve cavity of a valve seat support ring. The polygonal sealing ring includes a triangular sealing ring and a quadrilateral sealing ring. The triangular sealing ring and the quadrilateral sealing ring are bonded together so that the contact end a of the quadrilateral sealing ring and the triangular sealing ring is completely placed inside the valve cavity of the valve seat support ring.

[0006] Preferably, it further includes a first O-ring and a second O-ring, which are placed alternately in the valve cavity.

[0007] Preferably, an O-ring is attached to the first O-ring, and graphite packing is provided at intervals next to the O-ring.

[0008] Preferably, springs are provided at intervals beside the graphite packing.

[0009] Preferably, the polygonal sealing ring is provided with an insert inside the valve seat support ring, and an elastic retaining ring is provided on the outer side of the valve seat support ring in close contact with the outer surface of the polygonal sealing ring.

[0010] Preferably, the contact end is a combination of triangular and quadrilateral sealing rings with alternating protrusions and recesses, and the protrusions and recesses are of the same shape and size.

[0011] Preferably, the first extended portion of the protrusion engages with the second extended portion of the recess.

[0012] Preferably, the protrusions and recesses on the triangular sealing ring correspond to the protrusions and recesses on the four-sided sealing ring.

[0013] The beneficial effects of this utility model are as follows: by dividing the polygonal sealing ring, which was originally a single-piece structure of the same material, into a double structure of a four-sided sealing ring and a triangular sealing ring, the four-sided sealing ring, made of a harder material, is completely placed in the valve cavity of the valve seat support ring, while the triangular sealing ring, made of a softer material, is exposed and cooperates with the ball valve to achieve a seal. In this way, when there are high and low temperatures and high and low air pressures in the valve cavity, the polygonal sealing ring of the double structure is not easily deformed and maintains its installation position without shifting, resulting in a more stable and better sealing effect under extreme temperature differences of the valve seat. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0015] Figure 1 This is a schematic diagram of the existing structure.

[0016] Figure 2 for Figure 1 A partial schematic diagram.

[0017] Figure 3 This is a schematic diagram of the structure of this embodiment.

[0018] Figure 4 This is an example. Figure 3 A three-dimensional view of a polygonal sealing ring.

[0019] Figure 5 This is an example. Figure 4 Enlarged view of the contact end of the four-sided sealing ring.

[0020] In the figure; valve seat support ring 10, elastic retaining ring 20, polygonal sealing ring 30, spring 40, insert 50, graphite packing 60, O-ring retaining ring 70, first O-ring seal 80, second O-ring seal 90, valve seat 100, valve cavity 101;

[0021] Triangular sealing ring 301, four-sided sealing ring 302, contact end 302a, protrusion 302a-1, recess 302a-2, first extension portion 302a-3, second extension portion 302a-4. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0025] Example

[0026] Reference Figures 1 to 5 This embodiment of the present invention provides an improved valve seat sealing ring, including a polygonal sealing ring 30 placed in the valve cavity 101 of the valve seat support ring 10. The polygonal sealing ring 30 includes a triangular sealing ring 301 and a quadrilateral sealing ring 302. The triangular sealing ring 301 and the quadrilateral sealing ring 302 are bonded together so that the contact end 302a of the quadrilateral sealing ring 302 and the triangular sealing ring 301 is completely placed in the valve cavity 101 of the valve seat support ring 10.

[0027] Specifically, the valve seat 100 is mainly sealed by a polygonal sealing ring 30, with an elastic retaining ring 20 for blocking. When the ball valve is squeezed from the right, it first contacts the polygonal sealing ring 30. As the force increases, it will contact the elastic retaining ring 20. When it contacts the insert 50, the ball valve is blocked.

[0028] There is a gap between the polygonal sealing ring 30 and the valve seat 100, forming a small chamber. Under high pressure, when the ball valve squeezes in, the air originally present in the chamber may not have enough time to be forced out through the release hole. The air pressure is the same as the outside atmospheric pressure, but a pressure difference is formed with the high pressure of the valve seat 100. This may force the polygonal sealing ring 30 out.

[0029] The improved polygonal sealing ring 30 combines a triangular sealing ring 301 with a plastic four-sided sealing ring 302. When a pressure difference occurs, the plastic four-sided sealing ring 302 is squeezed against the valve seat 10 and will not pop out.

[0030] At low pressure, the ball valve presses against the valve seat 100 and the polygonal sealing ring 30 instantaneously, causing the valve seat 100, which is responsible for receiving the plastic, to be unable to support it. It directly squeezes the polygonal sealing ring 30, and under the action of friction, it shears and damages the polygonal sealing ring 30, rendering the polygonal sealing ring 30 ineffective.

[0031] The improved polygonal sealing ring 30 combines a triangular sealing ring 301 with a plastic four-sided sealing ring 302. The polygonal sealing ring 30 is elastic. When the ball valve is squeezed in, the plastic four-sided sealing ring 302 cannot perfectly fit the shape of the ball valve. However, under the action of force, the ball valve squeezes the plastic four-sided sealing ring 302, which in turn exerts a force on the triangular sealing ring 301. Under the elastic action of the rubber of the triangular sealing ring 301, the triangular sealing ring 301 and the plastic four-sided sealing ring 302 will adapt to fit the ball valve, so that gas will not leak.

[0032] For example, the valve seat 100 is a basic structure for mounting multiple sealing rings and elastic retaining rings 20. It has an internal vent and a valve cavity 101, and also includes a first O-ring 80 and a second O-ring 90. The first O-ring 80 and the second O-ring 90 are spaced apart within the valve cavity 101 to provide a sealing effect. An O-ring retaining ring 70 is attached tightly to the first O-ring 80 to position the first O-ring 80 and the second O-ring 90 and prevent displacement. Graphite packing 60 is spaced apart from the O-ring retaining ring 70. Graphite has good high-temperature resistance and deformation resistance. It serves to prevent gas leakage; springs 40 are spaced apart from the graphite packing 60, and springs 40 serve to install valve seat 100 and valve seat support ring 10, providing buffer protection; polygonal sealing ring 30 is located inside valve seat support ring 10 with insert 50, which is part of valve seat 100 or an independent rigid support, used to ultimately bear the mechanical pressure of ball valve, prevent excessive displacement of ball valve, and protect sealing ring from excessive compression; elastic retaining ring 20 is provided on the outer side of valve seat support ring 10, closely attached to the outer surface of polygonal sealing ring 30. Elastic retaining ring 20 also serves to buffer protection, preventing deformation of sealing ring from causing gas leakage.

[0033] For example, such as Figures 4-5 The contact end 302a of the triangular sealing ring 301 and the quadrilateral sealing ring 302 shown is a structure.

[0034] Specifically, the contact end 302a consists of a protrusion 302a-1 and a recess 302a-2 that intersect the triangular sealing ring 301 and the quadrilateral sealing ring 302. The protrusions 302a-1 and the recesses 302a-2 are of the same shape and size, forming a surface with uneven surfaces in both the longitudinal and transverse directions. The protrusions 302a-1 and the recesses 302a-2 on the triangular sealing ring 301 correspond to the protrusions 302a-1 and the recesses 302a-2 on the quadrilateral sealing ring 302. The first extension portion 302a-3 of the protrusion 302a-1 corresponds to the second extension portion 302a-4 of the recess 302a-2. The interlocking protrusions 302a-1 and the recesses 302a-2 are identical in shape, which means that the contact ends 302a of the triangular sealing ring 301 and the quadrilateral sealing ring 302 are identical in shape, making them more firmly bonded with adhesive. When the triangular sealing ring 301 and the quadrilateral sealing ring 302 deform due to their different materials, the two are also more firmly bonded. At the same time, when subjected to shearing forces from high and low pressure air during sealing, their interlocking concave and convex structure provides better shear resistance. All of these factors combined make the spliced ​​polygonal sealing ring 30 more stable and provide a stronger sealing effect.

[0035] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0036] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An improved valve seat sealing ring, characterized in that: The polygonal sealing ring (30) is placed in the valve cavity (101) of the valve seat support ring (10). The polygonal sealing ring (30) includes a triangular sealing ring (301) and a quadrilateral sealing ring (302). The triangular sealing ring (301) and the quadrilateral sealing ring (302) are bonded together so that the contact end (302a) of the quadrilateral sealing ring (302) and the triangular sealing ring (301) is completely placed in the valve cavity (101) of the valve seat support ring (10).

2. The improved valve seat sealing ring as described in claim 1, characterized in that: It also includes a first O-ring (80) and a second O-ring (90), which are placed alternately in the valve cavity (101).

3. The improved valve seat sealing ring as described in claim 2, characterized in that: An O-ring (70) is attached to the side of the first O-ring (80), and a graphite packing (60) is provided at intervals next to the O-ring (70).

4. The improved valve seat sealing ring as described in claim 3, characterized in that: Springs (40) are provided at intervals beside the graphite packing (60).

5. The improved valve seat sealing ring as described in claim 1, characterized in that: The polygonal sealing ring (30) is provided with an insert (50) inside the valve seat support ring (10), and the valve seat support ring (10) is provided with an elastic retaining ring (20) on the outer side of the polygonal sealing ring (30) in close contact with the outer surface of the polygonal sealing ring (30).

6. The improved valve seat sealing ring as described in claim 1, characterized in that: The contact end (302a) consists of a protrusion (302a-1) and a recess (302a-2) that intersect a triangular sealing ring (301) and a four-sided sealing ring (302). The protrusion (302a-1) and the recess (302a-2) are of the same shape and size.

7. The improved valve seat sealing ring as described in claim 6, characterized in that: The first extension portion (302a-3) of the protrusion (302a-1) and the second extension portion (302a-4) of the recess (302a-2) engage with each other.

8. The improved valve seat sealing ring as described in claim 6, characterized in that: The protrusions (302a-1) and recesses (302a-2) on the triangular sealing ring (301) correspond to the protrusions (302a-1) and recesses (302a-2) on the quadrilateral sealing ring (302).

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