CN214662118U - Polyphenyl resin polytetrafluoroethylene valve seat - Google Patents

Abstract

The utility model discloses a polyphenyl resin polytetrafluoroethylene valve seat, which comprises a first valve seat and a second valve seat made of polyphenyl resin polytetrafluoroethylene; the first valve seat is inserted into the second valve seat and is in threaded connection with the second valve seat; a sealing gasket is arranged between the first valve seat and the second valve seat; the sealing gasket comprises a cylindrical body which is hollow inside, sealing lips are arranged on the circumferential surface of the body, and a reinforcing part extends from the inner ring of the body; the cross-section of the reinforcing part is in an inverted trapezoid shape, the upper end face of the reinforcing part extends to be provided with a limiting ring, and a slot is formed between the body and the limiting ring. The beneficial effects of the utility model reside in that: 1. the valve seat is made of the mixture of the polyphenyl ester and the polytetrafluoroethylene, so that the physical and chemical properties of the valve seat are enhanced, and the valve seat is resistant to high temperature and high pressure, corrosion and abrasion; the service life of the valve seat is prolonged; 2. the combined valve seat is arranged, so that the disassembly is convenient, and the application range is wide; 3. and a special sealing structure is arranged, and the first valve seat and the second valve seat are tightly connected without air leakage or liquid leakage.

Description

Polyphenyl resin polytetrafluoroethylene valve seat

Technical Field

The utility model relates to a disk seat, in particular to polyphenyl fat polytetrafluoroethylene disk seat.

Background

The valve seat is a detachable part in the valve and is used for supporting the valve core at the fully closed position and forming a sealing pair, and the diameter of the common valve seat is the maximum flow of the valve. The material of the valve seat is of great importance due to the functional specificity of the valve seat.

A bubble-tight seal is achieved using a resilient sealing material and a small actuator thrust, compressing the valve seat sealing stress causing the material to deform resiliently into the rough surface of the mating metal part to block all leakage paths. The permeability of a material is a basis for a small leak in a fluid; the material is too soft or undergoes cold deformation (creep) under load and may be stiffened by the addition of fillers such as glass fibres. If the material is used for being made into a sheet, the material still can meet the use requirement, and can eliminate cold deformation or permanent deformation; the seal must be carefully secured against rupture and air leakage due to the pressure differential. The adhesion of the soft valve seat to the metal part is a solution, but does not completely solve the problem, since the adhesion cracks and fails when subjected to thermal shock. A sufficiently large pressure drop will destroy the bonding material.

The existing valve seat has certain limitation on materials, and the sealing performance, the wear resistance and the like required by the valve seat are required to be met on other structures.

Polytetrafluoroethylene (Teflon or PTFE), commonly known as "plastic king", is a high molecular compound formed by polymerizing tetrafluoroethylene, and has excellent chemical stability, corrosion resistance, sealing property, high lubrication non-adhesiveness, electrical insulation property and good aging resistance. Used as engineering plastics and can be made into polytetrafluoroethylene tubes, rods, belts, plates, films and the like. The material is generally applied to corrosion-resistant pipelines, containers, pumps, valves, radar manufacturing equipment, high-frequency communication equipment, radio equipment and the like with higher performance requirements.

Polyphenyl ester is also called poly (p-hydroxy benzoyl), the molecular main chain of the polyphenyl ester contains polymer of p-oxybenzoyl repeating structural units, the material is light yellow to brown yellow crystalline powder or granules, and the polyphenyl ester can be blended with polytetrafluoroethylene, sintered and molded and processed into a required shape by a machining mode; the high-temperature-resistant oil-free lubricating sealing element is mainly used as a high-temperature-resistant oil-free lubricating sealing element, parts of light industrial machinery, chemical machinery, electronic and electric appliances, instruments and meters, an engine connector and the like.

Disclosure of Invention

An object of the utility model is to provide a good and wear-resisting polyphenyl fat polytetrafluoroethylene disk seat of leakproofness.

In order to achieve the above object, the utility model provides a following technical scheme: a polyphenyl resin polytetrafluoroethylene valve seat comprises a first valve seat and a second valve seat which are made of polyphenyl resin polytetrafluoroethylene; the first valve seat is inserted into the second valve seat and is in threaded connection with the second valve seat; a sealing gasket is arranged between the first valve seat and the second valve seat; the sealing gasket comprises a cylindrical body which is hollow inside, sealing lips are arranged on the circumferential surface of the body, and a reinforcing part extends from the inner ring of the body; the cross-section of the reinforcing part is in an inverted trapezoid shape, a limiting ring extends from the upper end face of the reinforcing part, and a slot is formed between the body and the limiting ring.

Preferably, one end of the first valve seat is provided with an insertion part matched with the slot.

Preferably, the inner wall of the second valve seat is provided with a dustproof groove, the dustproof groove corresponds to the sealing lip, and the sealing lip is positioned in the dustproof groove.

Preferably, the lower end of the discharging nozzle is conical, and the dust-proof groove is a groove with an arc-shaped surface.

Preferably, the outer diameter of the insertion part is smaller than the outer diameter of the first valve seat.

Preferably, the second valve seat has an extension wall extending from the peripheral surface of both ends.

Preferably, one end of the first valve seat, which is close to the insertion part, is provided with threads, and the threads are matched with the internal threads of the second valve seat.

The beneficial effects of the utility model reside in that: 1. the utility model adopts the mixture of the polyphenyl ester and the polytetrafluoroethylene to manufacture the valve seat, thereby enhancing the physical property and the chemical property of the valve seat, and being high temperature and pressure resistant, corrosion resistant and wear resistant; the service life of the valve seat is prolonged; 2. the combined valve seat is arranged, so that the disassembly is convenient, and the application range is wide; 3. and a special sealing structure is arranged, so that the first valve seat and the second valve seat are tightly connected without air leakage or liquid leakage.

Drawings

Fig. 1 is a schematic diagram of the explosion structure of the present invention.

Fig. 2 is a schematic sectional view of the present invention.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

In the drawings, the reference numbers: 1. a first valve seat; 2. a second valve seat; 3. a gasket; 301. a body; 302. a sealing lip; 303. a reinforcing portion; 304. a limiting ring; 101. a plug-in part; 201. a dust-proof groove; 202. extending the wall.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 3, the present invention provides a technical solution: as shown in fig. 1, a valve seat of poly (p-phenylene terephthalamide) comprises a first valve seat 1 and a second valve seat 2; the first valve seat 1 is inserted into the second valve seat 2 and is connected with the second valve seat 2 through threads; a sealing gasket 3 is arranged between the first valve seat 1 and the second valve seat 2; as shown in fig. 2 and 3, the gasket 3 includes a body 301 having a hollow cylindrical shape, a sealing lip 302 is provided on a circumferential surface of the body 301, and a reinforcing portion 303 is provided to extend from an inner ring of the body 301; a seal lip 302 and a reinforcement portion 303 are provided on the outer ring to seal the outer wall of the first valve seat 1 and the inner wall of the second valve seat 2.

Through the setting that adopts above-mentioned technical scheme, adopt the combination valve seat of new construction to set up sealed pad 3 between first valve seat 1 and second valve seat 2 and seal, also increase its leakproofness when making things convenient for the valve seat dismouting.

As a further description of the above technical solution: the cross section of the reinforcing part 303 is in an inverted trapezoid shape, a limiting ring 304 extends from the upper end face of the reinforcing part, and a slot is formed between the body 301 and the limiting ring 304.

As a further description of the above technical solution: one end of the first valve seat 1 is provided with an inserting part 101 matched with the inserting groove.

Through the arrangement of the technical scheme, the first valve seat 1 and the sealing gasket 3 are connected through the matching of the insertion part 101 and the slot.

As a further description of the above technical solution: be equipped with dust protection groove 201 on the inner wall of second disk seat 2, just dust protection groove 201 position with seal lip 302 corresponds, seal lip 302 is located in dust protection groove 201.

As a further description of the above technical solution: the dust-proof groove 201 is a groove with an arc-shaped surface.

Through the setting that adopts above-mentioned technical scheme, through the dust slot 201 that sets up the arcwall face, it is tighter that grafting when first disk seat 1 and second disk seat 2 is tighter, and the seal lip 302 on the sealed pad 3 is inseparabler with being connected of dust slot 201, and sealed effect is better.

As a further description of the above technical solution: the outer diameter of the plug part 101 is smaller than the outer diameter of the first valve seat 1.

As a further description of the above technical solution: extending walls 202 extend from the peripheral surfaces of both ends of the second valve seat 2.

As a further description of the above technical solution: one end of the first valve seat 1 close to the insertion part 101 is provided with threads and is matched with the internal threads of the second valve seat 2.

As a further description of the above technical solution: the first valve seat 1 and the second valve seat 2 are both made of a mixed material of polyphenyl resin and polytetrafluoroethylene.

Through the setting that adopts above-mentioned technical scheme, through adopting the mixed material preparation first valve seat 1 and second valve seat 2 of polyphenyl fat and polytetrafluoroethylene, utilize the material characteristic to improve the antifriction nature and the corrosion resistance of first valve seat 1 and second valve seat 2.

The utility model discloses a using-way is unanimous with current disk seat, does not do here and gives unnecessary details.

The utility model has the advantages that: 1. the utility model adopts the mixture of the polyphenyl ester and the polytetrafluoroethylene to manufacture the valve seat, thereby enhancing the physical property and the chemical property of the valve seat, and being high temperature and pressure resistant, corrosion resistant and wear resistant; the service life of the valve seat is prolonged; 2. the combined valve seat is arranged, so that the disassembly is convenient, and the application range is wide; 3. and a special sealing structure is arranged, so that the first valve seat and the second valve seat are tightly connected without air leakage or liquid leakage.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. A polyphenyl resin polytetrafluoroethylene valve seat is characterized in that: comprises a first valve seat and a second valve seat; the first valve seat is inserted into the second valve seat and is in threaded connection with the second valve seat; a sealing gasket is arranged between the first valve seat and the second valve seat; the sealing gasket comprises a cylindrical body which is hollow inside, sealing lips are arranged on the circumferential surface of the body, and a reinforcing part extends from the inner ring of the body; the cross-section of the reinforcing part is in an inverted trapezoid shape, a limiting ring extends from the upper end face of the reinforcing part, and a slot is formed between the body and the limiting ring.

2. The polyphenylacetylated polytetrafluoroethylene valve seat according to claim 1, wherein: one end of the first valve seat is provided with an inserting part matched with the slot.

3. The polyphenylacetylated polytetrafluoroethylene valve seat according to claim 1, wherein: and a dustproof groove is formed in the inner wall of the second valve seat, the dustproof groove corresponds to the sealing lip in position, and the sealing lip is positioned in the dustproof groove.

4. A polyphenylacetylated polytetrafluoroethylene valve seat as set forth in claim 3, wherein: the dust-proof groove is a groove with an arc-shaped surface.

5. The polyphenylacetylated polytetrafluoroethylene valve seat according to claim 2, wherein: the outer diameter of the insertion part is smaller than that of the first valve seat.

6. The polyphenylacetylated polytetrafluoroethylene valve seat according to claim 1, wherein: extension walls extend from the circumferential surfaces of the two ends of the second valve seat.

7. The polyphenylacetylated polytetrafluoroethylene valve seat according to claim 2, wherein: and one end of the first valve seat, which is close to the insertion part, is provided with threads and is matched with the internal threads of the second valve seat.

8. The polyphenylacetylated polytetrafluoroethylene valve seat according to claim 1, wherein: the first valve seat and the second valve seat are both made of a mixed material of polyphenyl resin and polytetrafluoroethylene.

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