CN209943545U

CN209943545U - Construction is convenient, corrosion-resistant VP823 plastic butterfly valve

Info

Publication number: CN209943545U
Application number: CN201920653336.6U
Authority: CN
Inventors: 康超
Original assignee: Xi'an Huanqi Pipe Manufacturing Co Ltd
Current assignee: Xi'an Huanqi Pipe Manufacturing Co Ltd
Priority date: 2019-05-08
Filing date: 2019-05-08
Publication date: 2020-01-14
Anticipated expiration: 2029-05-08

Abstract

The utility model relates to a valve manufacturing technical field, more specifically say, it relates to a construction convenience, corrosion-resistant VP823 plastic butterfly valve. Valve body, valve rod and butterfly plate are the CPVC material, the butterfly plate be in the valve body and with valve rod fixed connection, the valve body inner chamber is provided with first sealing washer, be provided with annular briquetting on the butterfly plate, be provided with the second sealing washer between annular briquetting and the butterfly plate, the second sealing washer is provided with a plurality of align to grid and is the bump of hidden discount shape, first sealing washer is provided with the concave point of the corresponding lock joint of second sealing washer epirelief, the concave point on bump on the second sealing washer and the first sealing washer can be buckled tightly completely and seal the formation sealed vice. Convenient, the corrosion-resistant VP823 plastic butterfly valve of construction is not only anticorrosive, resistant dashing effectual, tears, easy maintenance moreover open, holistic life is longer.

Description

Construction is convenient, corrosion-resistant VP823 plastic butterfly valve

Technical Field

The utility model relates to a valve manufacturing technical field, more specifically say, it relates to a construction convenience, corrosion-resistant VP823 plastic butterfly valve.

Background

The three-eccentric butterfly valve is widely used for industrial pipelines with medium temperature less than or equal to 425 ℃ for metallurgy, electric power, petrochemical industry, water supply and drainage, municipal construction and the like, and is used for flow regulation and flow carrying and breaking. The existing three-eccentric center butterfly valve is mainly made of cast iron, cast steel, stainless steel and other materials, and the butterfly valve made of the materials is heavy, difficult to machine, poor in sealing performance, inconvenient to construct and use and poor in corrosion resistance, so that the overall service life of the butterfly valve is affected.

The VP821 butterfly valve made of non-metallic materials is applied to an oilfield produced water system for many years at present, and is a concentric center line rubber sealing butterfly valve which is structurally characterized in that the axis of a valve rod, the center of a butterfly plate and the center of a body are in the same position, and the butterfly plate and a valve seat are always in an extrusion and scraping state, so that the resistance distance is large, the abrasion is fast, and the pressure bearing is low; because the valve seat is made of substantially oil-resistant or corrosion-resistant rubber, the valve seat is less adaptable to the medium. Therefore, various problems occur in the use process of the VP821 butterfly valve, along with the addition of a large amount of chemical additives such as oil recovery additives, water treatment agents and the like of different types in the oil recovery process, the composition of produced water is extremely complex, and factors such as celebration, prolonging of water quality mineralization degree of part of blocks of an oil field and the like are added, the traditional sealing type and sealing material have serious insufficient adaptability, and leakage and normal production are caused by rubber aging and sealing falling when most stations are used for a short time.

In addition, when the existing triple offset butterfly valve is used, the following defects still exist:

(1) because the sealing surface of the triple eccentric butterfly valve is of a conical structure, the requirement on machining precision is high, the machining difficulty is high, and particularly, the triple eccentric butterfly valve with a metal hard sealing structure is difficult to realize zero leakage of a medium.

(2) The sealing between the sealing surface of the valve plate and the valve seat of the triple eccentric butterfly valve is realized by pressing the valve plate to the valve seat by the torque of the transmission device. In the positive flow state, the higher the pressure of the medium, the tighter the seal is squeezed. When the unit positive pressure between the valve plate and the valve seat is smaller than the medium pressure along with the increase of the medium pressure during the backflow of the flow channel medium, the sealing begins to leak.

SUMMERY OF THE UTILITY MODEL

In order to solve the drawback that exists in the application of above-mentioned VP821 butterfly valve in the extraction water system, the utility model provides a construct convenient, corrosion-resistant VP823 plastic butterfly valve.

In order to achieve the above purpose, the utility model provides a following technical scheme: a VP823 plastic butterfly valve convenient and fast to construct and resistant to corrosion comprises a butterfly valve body, wherein the butterfly valve body comprises a valve body, a valve rod and a butterfly plate, the valve body, the valve rod and the butterfly plate are made of CPVC materials, the butterfly plate is located in the valve body and fixedly connected with the valve rod, a first sealing ring is arranged in an inner cavity of the valve body, an annular pressing block is arranged on the butterfly plate, a second sealing ring is arranged between the annular pressing block and the butterfly plate, a plurality of uniformly-arranged convex points in a hidden buckle shape are arranged on the second sealing ring, a concave point corresponding to a buckle connection with the convex point on the second sealing ring is arranged on the first sealing ring, and the convex point on the second sealing ring and the concave point on the first sealing ring can be;

furthermore, a plurality of ceramic bolts are arranged on the annular pressing block, and the second sealing ring is fixed on the butterfly plate through the ceramic bolts;

furthermore, the second sealing ring is made of acid-base-resistant and high-temperature-resistant polytetrafluoroethylene, and the first sealing ring is made of a graphite composite material with certain elasticity;

further, the surfaces of the second sealing ring and the first sealing ring are sequentially coated with an anti-corrosion coating and a wear-resistant coating from inside to outside.

The utility model discloses an actively advance the effect and lie in:

firstly, the three-eccentric structure form of the VP823 plastic butterfly valve of the utility model determines that the valve has a small opening torque, and the valve plate and the valve seat are separated in the opening and closing processes, so that no friction exists, and the service life is long; the body sealing type greatly improves the bearing capacity and the sealing performance of the body, the body sealing type is the same as that of a traditional VP821 butterfly valve in design standard, the structure size is consistent, the body sealing type has good interchangeability with the VP821, meanwhile, in order to meet the requirement of a buried pipeline on an extension rod butterfly valve, the VP823 can be added with extension rods with different specifications, such as 0.8 meter, 1.2 meters, 1.9 meters, 2.4 meters and the like, and meanwhile, the body sealing type can be designed and manufactured according to the requirement of the situation.

Secondly, compare the three eccentric valves that traditional metal was made, the utility model discloses creatively be applied to three eccentric valves to the CPVC material. Chlorinated polyvinyl chloride (CPVC) is a product of further chlorination modification of polyvinyl chloride (PVC), and has a lot of excellent performances of polyvinyl chloride, and the corrosion resistance, heat resistance, solubility, flame retardance, mechanical strength and the like of the chlorinated polyvinyl chloride (CPVC) are greatly improved compared with PVC, so that compared with the traditional metal material, the CPVC material is lighter and lighter when being applied to a butterfly valve, low in price, strong in corrosion resistance and insulating property, and more compact in adhesion with a plastic pipeline. In addition, the sealing material is made of a polytetrafluoroethylene and graphite composite material, has the characteristics of acid resistance, alkali resistance and various organic solvents resistance, is almost insoluble in all solvents, has low friction coefficient and is difficult to age, and the defects of expansion, aging, falling off and the like of a sealing rubber ring of corrosion-resistant rubber (EPDM) in high-salinity produced water of an oil field are thoroughly overcome.

Once more, the utility model discloses a thereby two sealing washers mutually support and reach better sealed, the material graphite composite that first sealing washer used is soft and have elasticity than second sealing washer polytetrafluoroethylene, set up the bump and the concave point of similar hidden discount shape simultaneously on first sealing washer and second sealing washer, consequently two sealing washers can laminate inseparabler when valve body and butterfly plate are closed, and can prevent that the sealing washer on contact back valve body and the butterfly plate from taking place the skew and leading to the leakproofness to reduce, in addition, because concave point and bump on the sealing washer can tightly close the lock completely, consequently can be fine prevent when the adverse current state, water pressure is too big and make the not firm situation of being washed out take place.

And finally, the two sealing rings are coated with an anti-corrosion coating and a wear-resistant coating, so that the performance of the sealing rings for preventing the sealing rings from being corroded by acidic or alkaline media and the wear consumption of the two sealing rings during contact can be greatly enhanced. Sealing washer cost is comparatively cheap, if appear sealed not good condition using longer time, only need through dismantling the bolt carry on supporting change can.

Therefore, construction convenience, corrosion-resistant VP823 plastic butterfly valve not only is anticorrosive, resistant dashing effectual, tears, easy maintenance moreover open, holistic life is longer.

Drawings

FIG. 1 is a schematic structural diagram of a VP823 plastic butterfly valve with convenient construction and corrosion resistance;

FIG. 2 is an enlarged view taken at the circle in FIG. 1;

reference numerals: 1. a butterfly valve body; 2. a valve body; 3. a valve stem; 4. a butterfly plate; 5. an annular pressing block; 7. a first seal ring; 8. a ceramic bolt; 9. and a second seal ring.

Detailed Description

The embodiments of the ceramic butterfly valve of the present invention are further described with reference to fig. 1 to 2.

As shown in fig. 1 to 2, a VP823 plastic butterfly valve with convenient construction and corrosion resistance comprises a butterfly valve body 1, wherein the butterfly valve body 1 comprises a valve body 2, a valve rod 3 and a butterfly plate 4, the butterfly plate 4 is located in the valve body 2 and fixedly connected with the valve rod 3, a first sealing ring 7 is arranged in an inner cavity of the valve body 2, an annular pressing block 5 is arranged on the butterfly plate 4, a second sealing ring 9 is arranged between the annular pressing block 5 and the butterfly plate 4, the second sealing ring 9 is provided with a plurality of convex points which are uniformly arranged in a hidden buckle shape, the first sealing ring 7 is provided with a concave point corresponding to the convex point on the second sealing ring 9, and the convex point on the second sealing ring 9 and the concave point on the first sealing ring 7 can be completely and tightly buckled for sealing;

furthermore, a plurality of ceramic bolts 8 are arranged on the annular pressing block 5, and a second sealing ring 9 is fixed on the butterfly plate 4 through the ceramic bolts 8;

further, the valve body 2, the valve rod 3 and the butterfly plate 4 are made of CPVC, the second seal ring 9 is made of acid-base-resistant and high-temperature-resistant polytetrafluoroethylene, and the first seal ring 7 is made of a graphite composite material with certain elasticity;

further, the surfaces of the second sealing ring 9 and the first sealing ring 7 are sequentially coated with an anti-corrosion coating and a wear-resistant coating from inside to outside.

The utility model discloses an actively advance the effect and lie in:

firstly, the three-eccentric structure form of the VP823 plastic butterfly valve of the utility model determines that the valve has a small opening torque, and the valve plate and the valve seat are separated in the opening and closing processes, so that no friction exists, and the service life is long; the body sealing type greatly improves the bearing capacity and the sealing performance of the body, the body sealing type is the same as that of a traditional VP821 butterfly valve in design standard, the structure size is consistent, the body sealing type has good interchangeability with the VP821, and meanwhile, in order to meet the requirement of a buried pipeline on an extension rod butterfly valve, the VP823 can be added with extension rods with different specifications, such as 0.8 meter, 1.2 meters, 1.9 meters, 2.4 meters and the like, and can be designed and manufactured according to the requirement of the situation.

The above description is for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way, and modifications and variations can be made without departing from the principles of the present invention.

Claims

1. The utility model provides a construction convenience, corrosion-resistant VP823 plastic butterfly valve, characterized by: including the butterfly valve body, the butterfly valve body is including valve body, valve rod and butterfly plate, valve body, valve rod and butterfly plate are the CPVC material, the butterfly plate be in the valve body and with valve rod fixed connection, the valve body inner chamber is provided with first sealing washer, be provided with annular briquetting on the butterfly plate, be provided with the second sealing washer between annular briquetting and the butterfly plate, the second sealing washer is provided with a plurality of align to grid and is the bump of secretly detaining the shape, first sealing washer is provided with the concave point that corresponds the lock joint with second sealing washer epirelief, bump on the second sealing washer and the concave point on the first sealing washer can be detained tightly totally and seal the formation sealed vice.

2. The VP823 plastic butterfly valve convenient to construct and corrosion-resistant according to claim 1, which is characterized in that: a plurality of ceramic bolts are arranged on the annular pressing block, and the second sealing ring is fixed on the butterfly plate through the ceramic bolts.

3. The VP823 plastic butterfly valve convenient to construct and corrosion-resistant according to claim 1, which is characterized in that: the second sealing ring is made of acid-base-resistant and high-temperature-resistant polytetrafluoroethylene, and the first sealing ring is made of a graphite composite material with certain elasticity.

4. The VP823 plastic butterfly valve convenient to construct and corrosion-resistant according to claim 3, which is characterized in that: the surfaces of the second sealing ring and the first sealing ring are coated with an anti-corrosion coating and a wear-resistant coating in sequence from inside to outside.