阅读说明：本技术 一种蝶阀及其化学品蝶阀高性能阀座 (Butterfly valve and high-performance valve seat of chemical butterfly valve thereof ) 是由 翁武秀 金宁 范成裕 钱海峰 狄九旺 俞垚 徐勇德 夏明� 于 2019-10-30 设计创作，主要内容包括：本发明公开了一种蝶阀及其化学品蝶阀高性能阀座,该阀座包括：由聚四氟乙烯和玻璃微珠烧结而成的复合密封系统；所述复合密封系统包括由上至下依次相连的防拉出区、密封固定区、弹性变形区、挠曲变形区及与阀板相接触的增能密封区；所述增能密封区内设置有弹性增能元件。本发明复合密封系统设计为特殊形状和密封结构；具有防拉出区、密封固定区、弹性变形区、挠曲变形区、增能密封区五个相互独立的区域,相互配合分别完成不同的功能,实现一百多万次寿命循环；依靠介质压力密封,挠曲变形区的挠曲变形,实现与阀板密封,通过阀板和介质压力来诱发、激励密封,低扭矩,零泄漏。具有对温度变化的自适应和磨损的自我调节能力,具有超长的使用寿命。(The invention discloses a butterfly valve and its chemical butterfly valve high-performance valve seat, the valve seat includes: a composite sealing system sintered by polytetrafluoroethylene and glass beads; the composite sealing system comprises an anti-pulling-out area, a sealing fixing area, an elastic deformation area, a deflection deformation area and an energizing sealing area which are sequentially connected from top to bottom, wherein the energizing sealing area is in contact with the valve plate; an elastic energizing element is arranged in the energizing seal area. The composite sealing system is designed into a special shape and a sealing structure; the anti-pulling device is provided with five mutually independent areas, namely an anti-pulling area, a sealing and fixing area, an elastic deformation area, a deflection deformation area and an energizing sealing area, which are mutually matched to respectively complete different functions, so that more than one million life cycles are realized; the sealing with the valve plate is realized by means of medium pressure sealing and the deflection deformation of the deflection deformation area, the sealing is induced and excited by the pressure of the valve plate and the medium, the torque is low, and the leakage is zero. The self-adjusting wear-resistant cable has self-adaptation to temperature changes and self-adjusting wear-resistant capability, and has an ultra-long service life.)

1. A chemical butterfly valve high performance disk seat, its characterized in that includes: a composite sealing system sintered by polytetrafluoroethylene and glass beads; the composite sealing system comprises an anti-pulling-out area, a sealing fixing area, an elastic deformation area, a deflection deformation area and an energizing sealing area which are sequentially connected from top to bottom, wherein the energizing sealing area is in contact with the valve plate; the anti-pull-out area, the sealing fixing area, the elastic deformation area and the bending deformation area are arranged in a cavity formed between the valve body and the valve seat support ring; the energizing seal zone is located outside the cavity; the anti-pull-out area is of a T-shaped structure and is used for preventing the valve seat from being pulled out of the cavity; a waterline groove is formed in the cavity corresponding to the sealing and fixing area and used for preventing the valve seat from loosening; the elastic deformation area can realize the sealing of the valve seat and the cavity through elastic deformation; and an elastic energizing element is arranged in the energizing sealing area and is matched with the bending deformation area capable of bending deformation, so that the sealing of the valve seat and the valve plate is realized.

2. The chemical butterfly valve high performance valve seat of claim 1, wherein the pull-out prevention region, the seal fixing region, the elastic deformation region, and the deflection deformation region together form a rod-like structure having a width that gradually narrows from top to bottom.

3. The chemical butterfly valve high performance valve seat of claim 1, wherein the pull-out prevention region, the seal fixation region, and the elastic deformation region are in contact with the cavity; the deflective deformation region is not in contact with the cavity.

4. The chemical butterfly valve high performance valve seat of claim 1, wherein the energizing seal area is a hollow sphere-like structure.

5. The chemical butterfly valve high performance valve seat of claim 1, wherein the resilient energizing element is a spring.

6. The chemical butterfly valve high performance valve seat of claim 5, wherein the spring is an annular structure.

7. The chemical butterfly valve high performance valve seat of claim 1, wherein the pull-out prevention region, the seal securing region, the elastic deformation region, the deflection deformation region, and the energizing seal region are integrally formed.

8. A butterfly valve comprising the chemical butterfly valve high performance valve seat of any of claims 1-7.

Technical Field

The invention relates to the field of chemical butterfly valves, in particular to a butterfly valve and a high-performance valve seat of the chemical butterfly valve.

Background

Butterfly valves are used in various industries to control the flow of fluids. Butterfly valves are commonly used in situations where the flow through the valve must be regulated. The valve seat is an important component constituting the sealing pair of the valve, and concerns the leakage of the valve. The current butterfly valve disk seat has the defect that the sealing reliability is poor and the service life is short.

Disclosure of Invention

The invention aims to provide a butterfly valve and a high-performance valve seat of a chemical butterfly valve thereof, which are used for solving the problems in the prior art.

To achieve the above object, the present invention provides a high performance valve seat for a chemical butterfly valve, comprising: a composite sealing system sintered by polytetrafluoroethylene and glass beads; the composite sealing system comprises an anti-pulling-out area, a sealing fixing area, an elastic deformation area, a deflection deformation area and an energizing sealing area which are sequentially connected from top to bottom, wherein the energizing sealing area is in contact with the valve plate; the anti-pull-out area, the sealing fixing area, the elastic deformation area and the bending deformation area are arranged in a cavity formed between the valve body and the valve seat support ring; the energizing seal zone is located outside the cavity; the anti-pull-out area is of a T-shaped structure and is used for preventing the valve seat from being pulled out of the cavity; a waterline groove is formed in the cavity corresponding to the sealing and fixing area and used for preventing the valve seat from loosening; the elastic deformation area can realize the sealing of the valve seat and the cavity through elastic deformation; and an elastic energizing element is arranged in the energizing sealing area and is matched with the bending deformation area capable of bending deformation, so that the sealing of the valve seat and the valve plate is realized.

The chemical butterfly valve high-performance valve seat comprises a pull-out preventing area, a sealing fixing area, an elastic deformation area and a bending deformation area, wherein the pull-out preventing area, the sealing fixing area, the elastic deformation area and the bending deformation area form a rod-shaped structure with the width gradually narrowing from top to bottom.

The chemical butterfly valve high-performance valve seat is characterized in that the pull-out preventing area, the sealing fixing area and the elastic deformation area are in contact with the cavity; the deflective deformation region is not in contact with the cavity.

The chemical butterfly valve high-performance valve seat is characterized in that the energizing sealing area is of a hollow spherical structure.

The chemical butterfly valve high-performance valve seat is characterized in that the elastic energizing element is a spring.

The chemical butterfly valve high-performance valve seat is characterized in that the spring is of an annular structure.

The chemical butterfly valve high-performance valve seat comprises a pull-out prevention area, a sealing fixing area, an elastic deformation area, a deflection deformation area and an energizing sealing area which are integrally formed.

The invention also provides a butterfly valve which comprises the chemical butterfly valve high-performance valve seat.

Compared with the prior art, the invention has the following beneficial effects:

(1) the vacuum, low pressure and high pressure working conditions are all covered. (2) The rolling friction and friction coefficient are small in the switching process, and the operation torque is low: in the opening and closing process of the butterfly valve, the friction between the high-performance valve seat and the valve plate of the chemical butterfly valve is rolling friction, not sliding friction and small in friction force; the composite sealing system of the high-performance valve seat of the chemical butterfly valve is made of polytetrafluoroethylene and glass beads, has a small friction coefficient and has a self-lubricating effect. (3) Medium pressure self-excited sealing structure: this structure relies on the medium pressure effect, under the medium pressure effect, induces chemical butterfly valve high performance disk seat deformation in the pressure direction, realizes the effective contact with the valve plate, guarantees reliably sealed. (4) Bidirectional sealing and zero leakage: because of the structural symmetry of the chemical butterfly valve high-performance valve seat, no matter which direction the medium enters, the chemical butterfly valve high-performance valve seat can be induced to deform in the pressure direction, effective contact with a valve plate is realized, and reliable sealing is guaranteed. Meanwhile, the composite sealing system of the high-performance valve seat of the chemical butterfly valve is made of polytetrafluoroethylene and glass beads, so that the chemical butterfly valve can be completely sealed and has zero leakage. (5) The service life is very long. (6) Has lighter weight and smaller installation space. (7) Maintenance is not needed, and the operation cost is low. (8) Different materials are selected to realize different functional combinations, and low temperature, high temperature and corrosion are met.

Drawings

FIG. 1 is a schematic illustration of a butterfly valve of the present invention including a chemical butterfly valve high performance valve seat;

FIG. 2 is a schematic illustration of the installation of the chemical butterfly valve high performance valve seat of the present invention;

FIG. 3 is a schematic structural view of a chemical butterfly valve high performance valve seat of the present invention;

FIG. 4 is a functional schematic of the chemical butterfly valve high performance valve seat of the present invention.

Detailed Description

The invention will be further described by the following specific examples in conjunction with the drawings, which are provided for illustration only and are not intended to limit the scope of the invention.

As shown in fig. 1 to 4, the present invention provides a high performance valve seat 11 for a chemical butterfly valve, and a butterfly valve 1 including the valve seat 11, wherein the valve seat 11 includes: a composite sealing system 21 formed by sintering polytetrafluoroethylene and glass beads.

The composite sealing system 21 comprises an anti-pulling-out area 31, a sealing fixing area 32, an elastic deformation area 33, a deflection deformation area 34 and an energizing sealing area 35 which are sequentially connected from top to bottom, wherein the energizing sealing area 35 is in contact with the valve plate 14; the pull-out prevention area 31, the seal fixing area 32, the elastic deformation area 33, the deflection deformation area 34 and the energizing seal area 35 are integrally formed; the anti-pull-out area 31, the seal fixing area 32, the elastic deformation area 33 and the deflection deformation area 34 are arranged in a cavity formed between the valve body 12 and the valve seat support ring 13; the energizing seal 35 is located outside the chamber. The anti-pulling-out area 31, the sealing fixing area 32, the elastic deformation area 33 and the bending deformation area 34 form a rod-shaped structure with gradually narrowed width from top to bottom; the anti-pulling-out area, the sealing fixing area and the elastic deformation area are in contact with the cavity; the deflective deformation region is not in contact with the cavity. The energizing seal zone 35 is a hollow spherical structure.

The pull-out prevention area 31 is of a T-shaped structure and is the position where the compression amount of the high-performance valve seat 11 of the chemical butterfly valve is the largest, and meanwhile, the valve seat support ring 13 and the valve body 12 are provided with grooves matched with the T-shaped structure, so that the high-performance valve seat 11 of the chemical butterfly valve is prevented from being pulled out under the action of medium impact or opening and closing of the valve plate 14.

A waterline groove is formed in the cavity corresponding to the sealing and fixing area 32, namely a waterline is processed on the valve body 12 and the valve seat support ring 13, the high-performance valve seat 11 in the area is extruded to be subjected to plastic deformation and enter the waterline grooves of the valve body 12 and the valve seat support ring 13, and the waterline groove has tooth-shaped indentations and is firmly fixed between the grooves formed by the high-performance valve seat support ring 13 and the valve body 12 of the chemical butterfly valve, so that the valve seat 11 is prevented from loosening under the action of a medium; meanwhile, the high-performance valve seat 11 of the chemical butterfly valve generates plastic deformation, and sealing with the valve body 12 and the support ring is realized.

Elastic deformation district 33 indicates chemical butterfly valve high performance disk seat 11 and disk seat lock ring 13, the sealed area of valve body 12, be located disk seat lock ring 13, between valve body 12, only generate elastic deformation takes place plastic deformation not, realize that chemical butterfly valve high performance disk seat 11 and disk seat lock ring 13, seal between the valve body 12, prevent that the medium from revealing outward, chemical butterfly valve high performance disk seat 11 and valve body 12 and disk seat lock ring 13's sealed mainly by this district realization promptly.

The flexible deformation region 34 is a transition region for inducing the high-performance valve seat 11 of the chemical butterfly valve to deform in the pressure direction under the action of medium pressure, the transition region is not in contact with the valve body 12 and the valve seat support ring 13 and is suspended in the cavity between the valve body 12 and the valve seat support ring 13, the transition region actually also has no sealing effect in the cavity between the valve body 12 and the valve seat support ring 13, and only deflects under the action of the medium pressure. And the energizing sealing area 35 and the valve plate 14 are ensured to realize reliable sealing.

Energizing seal area 35 refers to the area of contact with valve plate 14; the elastic energizing element 22 is fixed in the composite sealing system 21 through mould pressing and is not contacted with a medium completely; the composite sealing system 21 is made of plastic material, providing a seal; the valve plate 14 and the medium pressure extrusion composite sealing system 21 are transmitted to the elastic energizing element 22, the elastic energizing element 22 generates elastic deformation, the energizing and energy storage effects of the elastic energizing element 22 realize that the energizing sealing area 35 and the valve plate 14 are tightly attached together to jointly form a flexible reliable sealing piece; the valve plate 14 extrudes the initial deformation generated by the chemical butterfly valve high-performance valve seat 11 to realize low-pressure and vacuum sealing; the medium pressure acts on the high-performance valve seat 11 to realize sealing; under the action of medium pressure, the high-performance valve seat 11 of the chemical butterfly valve is induced to deform in the pressure direction, so that effective contact with a valve plate 14 is realized, and reliable sealing is guaranteed.

The composite sealing system 21 is sintered by polytetrafluoroethylene and glass beads which have good sealing performance, wear resistance, low friction loss and self lubrication and is mechanically processed into a certain flexible structure; the elastic energizing element 22 is made of a ring spring with a memory function and has good elasticity; the energy increasing and storing function is good under the action of medium pressure; the elastic energizing element 22 is molded by a mold and fixed in the composite sealing system 21 without contacting with the medium; the composite seal system 21 provides sealing, energizing and energy storage of the elastomeric energizing element 22, which together comprise a flexible, reliable seal.

In conclusion, the high-performance valve seat of the chemical butterfly valve has a unique stainless steel metal and polymer material composite structure and consists of a composite sealing system and an elastic energizing element. The composite sealing system is made of polytetrafluoroethylene and glass beads which are good in sealing performance, abrasion-resistant, low in friction loss and self-lubricating; the elastic energizing element is made of a stainless steel spring with a memory function, and the energizing effect is good; the composite sealing system is designed into a special shape and a sealing structure; the anti-pulling device is provided with an anti-pulling area, a sealing and fixing area, an elastic deformation area, a deflection deformation area and an energizing sealing area, and five independent areas are mutually matched to respectively complete different functions, so that more than one million life cycles are realized; the sealing with the valve plate is realized by means of medium pressure sealing and deflection deformation of a deflection deformation area, the sealing is induced and excited by the pressure of the valve plate and the medium, the torque is low, and the bidirectional sealing is free from leakage. The self-adjusting wear-resistant cable has self-adaptation to temperature changes and self-adjusting wear-resistant capability, and has an ultra-long service life.

While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.