CN109973678A - A kind of double-valve-seat regulation ball valve - Google Patents
A kind of double-valve-seat regulation ball valve Download PDFInfo
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- CN109973678A CN109973678A CN201910270359.3A CN201910270359A CN109973678A CN 109973678 A CN109973678 A CN 109973678A CN 201910270359 A CN201910270359 A CN 201910270359A CN 109973678 A CN109973678 A CN 109973678A
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- valve
- valve body
- seat
- core
- double
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0605—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor with particular plug arrangements, e.g. particular shape or built-in means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0647—Spindles or actuating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0668—Single packings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0689—Packings between housing and plug
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
- F16K5/201—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention discloses a kind of double-valve-seat regulation ball valve, including valve body, valve seat, spool, the valve body includes main valve body, two auxiliary valve bodies for being separately fixed at main valve body two sides；The valve seat totally two, valve seat is located between two auxiliary valve bodies, and two valve seats are located at the opposite sides of valve body radial direction；The spool is located between two valve seats.The purpose of the present invention is to provide a kind of double-valve-seat regulation ball valves, to solve the problems, such as that ball valve core abrasion is very fast in the prior art, valve rod driving torque is larger, the purpose for improving ball valve two way seal performance, improving degree of regulation, reducing spool abrasion and driving torque is realized.
Description
Technical field
The present invention relates to regulating valve fields, and in particular to a kind of double-valve-seat regulation ball valve.
Background technique
Ball valve comes out in the 1950s, with the rapid development of science and technology, production technology and product structure are not
It is disconnected to improve, in the 40 short years, rapidly develop as a kind of main valve class.In the country of western industrial prosperity,
The use of ball valve is continuous year by year to be risen.In China, ball valve be widely used petroleum refining, long-distance transport pipes, chemical industry,
The industries such as papermaking, pharmacy, water conservancy, electric power, municipal administration, steel occupy very important status in national economy.It has rotation
90 degree of movement, faucet body are sphere, have circular through hole or channel to pass through its axis.Ball valve is mainly used to cut in pipeline
Disconnected, distribution and the flow direction for changing medium, it only needs to be closed with the rotating torque of the operation and very little that are rotated by 90 °
Tightly.Ball valve optimum switchs, stop valve uses, V-type ball valve.
Ball valve, as opening and closing element, is mainly made of valve body, valve seat, core, valve rod etc. using core.Pass through valve rod screw
The direction of 90 ° of core i.e. changeable through-holes, so that the switch of ball valve is realized, for turning off, distributing, changing medium flow field on pipeline
To, adjust uninterrupted etc..Valve seat selects different valve base sealing forms according to the difference of applying working condition, and valve body structure then has one
Body formula, double-body bike and three-body type.For general regulation ball valve using V-type ball valve, core is 1/4 sphere, has v-notch, tool
There is biggish negotiability.Existing ball valve usually uses rubber, nylon and polytetrafluoroethylene (PTFE) as valve base sealing loop material, therefore
It is limited using temperature by valve base sealing loop material.And again since the valve seat insert of existing ball valve generallys use modeling
Material is made, therefore in the structure and performance of selection ball valve, the fire resisting and fire prevention of ball valve are considered, especially in petroleum, chemical industry, smelting
Jin Deng department uses ball valve, more it should be noted that fire resisting and fire prevention in the equipment and pipe-line system of inflammable, explosive medium.Therefore, existing
1. it is polytetrafluoroethylene (PTFE) because of the most important valve base sealing loop material of ball valve that ball valve in technology mainly has the disadvantages that,
It is inert that it, which has almost all of chemical substance, and with coefficient of friction is small, performance is stable, non-aging, temperature is suitable
With the comprehensive feature that range is wide and sealing performance is excellent.But the physical characteristic of polytetrafluoroethylene (PTFE), including the higher coefficient of expansion,
Sensibility and undesirable heat conductivity to cold flow, it is desirable that the design of valve base sealing has to be around the progress of these characteristics.So when
When sealing material is hardened, the reliability of sealing is just destroyed.Moreover, the temperature resistant grade of polytetrafluoroethylene (PTFE) is lower, it can only be small
It is used in the case of 180 DEG C.More than this temperature, sealing material will aging.And consider in the case where being used for a long time, general only meeting
It is used at 120 DEG C.2. its regulation performance is less better relative to shut-off valve, especially pneumatic operated valve (or motor-driven valve).
In addition, still ball valve in the prior art unidirectionally can only be tightly turned off using single valve seat sealing structure.Ball valve
Valve rod is generally directly mounted in core, and valve rod weight increases the frictional force of core rotation process, accelerates the abrasion of core.
In addition, directly contacting between the fixing pieces such as the rotating member valve rod of ball valve and valve body, valve deck, driving torque is larger.Such as patent
" the wear-resisting anti-blocking adjusting cutting ball valve of total pressure difference " disclosed in CN205559838U, provides a kind of regulation ball valve of single valve seat,
Valve rod weight is directly carried on spool, accelerates the abrasion in core rotation process, and the rotatable parts such as valve rod and valve deck etc.
It rigidly rubs between fixing piece, causes driving torque larger.
Summary of the invention
The purpose of the present invention is to provide a kind of double-valve-seat regulation ball valve, with solve ball valve core abrasion in the prior art compared with
Fastly, the larger problem of valve rod driving torque is realized and improves ball valve two way seal performance, improve degree of regulation, reduce spool abrasion
With the purpose of driving torque.
The present invention is achieved through the following technical solutions:
A kind of double-valve-seat regulation ball valve, including valve body, valve seat, spool, the valve body include main valve body, are separately fixed at master
Two auxiliary valve bodies of valve body two sides；The valve seat totally two, valve seat is located between two auxiliary valve bodies, and two valve seats are located at valve body
The opposite sides of radial direction；The spool is located between two valve seats.
For the problem that the abrasion of ball valve core in the prior art is very fast, valve rod driving torque is larger, the present invention proposes one kind
Double-valve-seat regulation ball valve, valve body are made of a main valve body and two auxiliary valve body three parts, and two auxiliary valve bodies are respectively fixedly connected with
In the two sides of main valve body.The present invention uses bivalve holder structure, suitable for high temperature and pressure and use occasion that operating condition often changes, energy
Valve locking caused by trim deformation under high temperature and high pressure condition is enough avoided, valve two way seal performance is significantly improved.
It is bolted to connection between the main valve body and auxiliary valve body, gasket is set between main valve body and auxiliary valve body
Piece.The fastening between main valve body and auxiliary valve body is realized by bolt, gasket seal is used to guarantee the overall sealing performance of valve body.
The valve seat is installed in auxiliary valve body by valve seat bracket；It is evenly distributed between the valve seat and auxiliary valve body several
Group spring, both ends of the spring are abutted with valve seat bracket and auxiliary valve body respectively.Several groups spring forms valve seat and core surface
Even axial force, it is ensured that the good seal performance of valve seat and valve core chamber.
The sealing surfaces built-up welding nickel-base alloy that the valve seat is contacted with spool；The valve seat lateral wall and auxiliary valve body inner sidewall
Between using sealing ring seal.
The spool includes that core, flow adjust window, and the core opens up through-hole in spherical in core；The flow
It adjusts window and is installed on core in the through-hole of valve inlet side, flow adjusts window and is fixedly connected with core.Core rotation
When drive flow to adjust window rotation, the fluid flow entered in core interior bone is adjusted by flow adjusting window cause for gossip is existing
Section.The shape that flow adjusts window is not limited thereto, and the flow in any existing structure, which adjusts window, may be applicable to this Shen
In ball valve please.
It further include the valve rod being connected with the core, the boss of stem exterior setting annular, further includes being set on valve rod
Valve deck, the boss is pressed on main valve body by the valve deck.The valve rod is stretched out from the upper end of main valve body, and valve deck is located at boss
Top, be bolted between valve rod and main valve body.In the prior art, ball-valve valve rod is directly mounted in core, valve rod
Weight increases the frictional force of core rotation process, accelerates the abrasion of core.Boss is arranged in this programme on valve rod thus, leads to
Crossing boss carries valve rod self weight by main valve body, and the boss of valve rod can be prevented by valve deck mechanical position limitation due to high pressure
Valve rod is caused to fly out, it is ensured that the work that valve rod can be safe and reliable.
Third sliding bearing is set between the valve rod and valve deck, the upper surface of the lower surface of valve rod boss and main valve body it
Between be arranged third thrust bearing, between the upper surface and bonnet lower surface of valve rod boss be arranged the 4th thrust bearing.Valve rod and valve
Third sliding bearing is set between lid, for improving the service life of valve rod.Third thrust bearing, the 4th thrust bearing are used for
Bear the stable rotation for ensuring valve rod while xial feed.
It further include being installed on the intracorporal top bearing shell of main valve, lower bearing, the top bearing shell, lower bearing are located at the phase of core
Be arranged to both ends, between one end and lower bearing of core first sliding axle hold, the first thrust bearing, the other end of core and upper axis
Between watt be arranged second sliding axle hold, the second thrust bearing；The first sliding axle is held, second sliding axle is held along valve body axial direction side
To distribution, first thrust bearing, the second thrust bearing are distributed along valve body radial direction.Using top bearing shell, lower axle tile structure
Fixed core, it is ensured that core will not shift in total travel movement.Top bearing shell, lower bearing and auxiliary valve body fix the axis of core jointly
To movement, the influence that pressure medium and core Gravitative Loads power can be made to generate valve seat is smaller, can eliminate and act on valve rod
Out-of-balance force avoids valve rod from causing torque to increase because being generated amount of deflection by axial thrust.First sliding axle is held, second sliding axle is held
For reducing frictional resistance, the first thrust bearing, the second thrust bearing are used to ensure while bearing xial feed the stabilization of core
Rotation.
The top bearing shell, lower bearing left and right sides be all made of the auxiliary valve bodies of stop pin and two sides and connect.
Compared with prior art, the present invention having the following advantages and benefits:
1, a kind of double-valve-seat regulation ball valve of the present invention can avoid trim under high pressure operating condition using double-valve-seat sealing structure
Valve locking caused by deformation improves valve two way seal performance；
2, the axial movement of a kind of double-valve-seat regulation ball valve of the present invention, the fixed core of top bearing shell, lower bearing and auxiliary valve body can
The influence for generating pressure medium and core Gravitative Loads power to valve seat is smaller, can eliminate the out-of-balance force acted on valve rod,
Valve rod is avoided to cause torque to increase because being generated amount of deflection by axial thrust；
3, a kind of double-valve-seat regulation ball valve of the present invention, valve rod and core are fitted close, and can be reduced since driving member gap is made
At return difference it is excessive, improve degree of regulation；The boss structure of valve rod can prevent the abrasion of the weight acceleration core because of valve rod, simultaneously
It prevents from causing valve rod to fly out due to high pressure, guarantees that valve rod can safely and reliably work；Each sliding bearing and thrust bearing structure
The service life that frictional force can be effectively reduced, reduce driving torque, improve valve inner member.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the cross-sectional view of the specific embodiment of the invention；
Fig. 2 is the partial enlarged view in Fig. 1 at A；
Fig. 3 is the main view of spool in the specific embodiment of the invention.
Label and corresponding parts title in attached drawing:
1- main valve body, 2- nut, 3- bolt, 4- gasket seal, 5- lower bearing, 6- stop pin, 7- first sliding axle are held, 8-
First thrust bearing, 9- valve seat, 10- core, 11- flow adjust window, 12- auxiliary valve body, 13- spring base, 14- spring, 15- valve
Seat support, 16- sealing ring, 17- built-up welding nickel-base alloy, the second thrust bearing of 18-, 19- second sliding axle are held, 20- top bearing shell,
21- third thrust bearing, the 4th thrust bearing of 22-, 23- third sliding bearing, 24- valve rod, 25- valve deck.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment 1:
A kind of double-valve-seat regulation ball valve as shown in Figures 1 and 2, including valve body, valve seat, spool, the valve body include master
Valve body 1, two auxiliary valve bodies 12 for being separately fixed at 1 two sides of main valve body；The valve seat 9 totally two, valve seat 9 is located at two auxiliary valve bodies
Between 12, and two valve seats 9 are located at the opposite sides of valve body radial direction；The spool is located between two valve seats 9.This implementation
Example uses bivalve holder structure, suitable for high temperature and pressure and use occasion that operating condition often changes, can be avoided high temperature and high pressure condition
Valve locking caused by lower trim deformation, significantly improves valve two way seal performance.
Embodiment 2:
A kind of double-valve-seat regulation ball valve as shown in Figure 1 to Figure 3, including valve body, valve seat, spool, the valve body include master
Valve body 1, two auxiliary valve bodies 12 for being separately fixed at 1 two sides of main valve body；The valve seat 9 totally two, valve seat 9 is located at two auxiliary valve bodies
Between 12, and two valve seats 9 are located at the opposite sides of valve body radial direction；The spool is located between two valve seats 9.
It is fixedly connected between the main valve body 1 and auxiliary valve body 12 by bolt 3, is arranged between main valve body 1 and auxiliary valve body 12
Gasket seal 4.The valve seat 9 is installed in auxiliary valve body 12 by valve seat bracket 15；Along week between the valve seat 9 and auxiliary valve body 12
To uniformly distributed several groups spring 14,14 both ends of spring are abutted with valve seat bracket 15 and auxiliary valve body 12 respectively.The valve seat 9 connects with spool
The sealing surfaces built-up welding nickel-base alloy 17 of touching；It is close using sealing ring 16 between 9 lateral wall of valve seat and 12 inner sidewall of auxiliary valve body
Envelope.
The spool includes that core 10, flow adjust window 11, and the core 10 opens up through-hole in core 10 in spherical；
The flow adjusts window 11 and is installed on core 10 in the through-hole of valve inlet side, and flow adjusts window 11 and core 10 is solid
Fixed connection.
The valve body of the present embodiment is three-body type structure, including a main valve body and two auxiliary valve bodies, main valve body and auxiliary valve body
Between using covering soft graphite metal serrated gasket sealing, using high-strength bolt, nut fasten, be suitable for high temperature and pressure
And the use occasion that operating condition often changes.To avoid valve locking caused by trim deformation under high temperature and high pressure condition, valve is improved
Door two way seal performance, the valve seat use double-valve-seat metal hard sealing structure, including two valve seats.The spool includes core
Window is adjusted with flow.
Preferably, the valve seat is installed in auxiliary valve body by valve seat bracket.The enclosed watch that the valve seat is contacted with core
Surface build-up welding nickel-base alloy.Circumference uniform distribution multiple groups preloading spring between the valve seat and auxiliary valve body, so that valve seat and core surface shape
At uniform axial force, it is ensured that the good seal performance of valve seat and valve core chamber.It is adopted between the valve seat outer circle and auxiliary valve body inner circle
It is sealed with graphite-seal ring.
Preferably, the core uses integral ball, and core opens hole.The flow adjusts window and is installed on close to valve
In the through-hole of door entrance side, it is spherical surface that flow, which adjusts window outboard face, and spherical radius is greater than core radius, avoids in ball
The spherical surface that flow adjusts window in core rotation process is contacted with valve seat.The flow adjusts window installation outer circle and matches with through-hole
Processing is closed, is welded and fixed.
Preferably, the gasket seal 4 is the metal serrated gasket for covering soft graphite.
Preferably, the shape that the flow adjusts window 11 is U-shaped, and flow-adjusting characteristics are equal percentage.Flow is adjusted
The part that window 11 extend out to 10 outer surface of core is spherical surface.
Embodiment 3:
A kind of double-valve-seat regulation ball valve as shown in Figure 1 to Figure 3, including valve body, valve seat, spool, the valve body include master
Valve body 1, two auxiliary valve bodies 12 for being separately fixed at 1 two sides of main valve body；
The valve seat 9 totally two, valve seat 9 is located between two auxiliary valve bodies 12, and two valve seats 9 are located at valve body radial direction
Opposite sides；The spool is located between two valve seats 9.Connect between the main valve body 1 and auxiliary valve body 12 by the way that bolt 3 is fixed
It connects, gasket seal 4 is set between main valve body 1 and auxiliary valve body 12.The valve seat 9 is installed on auxiliary valve body 12 by valve seat bracket 15
It is interior；Be evenly distributed several groups spring 14 between the valve seat 9 and auxiliary valve body 12,14 both ends of spring respectively with valve seat bracket 15 and
Auxiliary valve body 12 abuts.The sealing surfaces built-up welding nickel-base alloy 17 that the valve seat 9 is contacted with spool；9 lateral wall of valve seat and pair
It is sealed between 12 inner sidewall of valve body using sealing ring 16.
The spool includes that core 10, flow adjust window 11, and the core 10 opens up through-hole in core 10 in spherical；
The flow adjusts window 11 and is installed on core 10 in the through-hole of valve inlet side, and flow adjusts window 11 and core 10 is solid
Fixed connection.Further include the valve rod 24 being connected with the core 10, the boss of annular is set outside valve rod 24, further includes being set in valve
The boss is pressed on main valve body 1 by the valve deck 25 on bar 24, the valve deck 25.
The valve rod 24 is stretched out from the upper end of main valve body 1, and valve deck 25 is located at the top of boss, valve rod 25 and main valve body 1 it
Between be bolted.Between the valve rod 24 and valve deck 25 be arranged third sliding bearing 23, the lower surface of 24 boss of valve rod with
Third thrust bearing 21 is set between the upper surface of main valve body 1, is set between 25 lower surface of upper surface and valve deck of 24 boss of valve rod
Set the 4th thrust bearing 22.
It further include the top bearing shell 20 being installed in main valve body 1, lower bearing 5, the top bearing shell 20, lower bearing 5 are located at
The opposite end of core 10 is arranged first sliding axle and holds the 7, first thrust bearing 8, ball between one end and lower bearing 5 of core 10
Second sliding axle is set between the other end and top bearing shell 20 of core 10 and holds the 19, second thrust bearing 18；The first sliding axle is held
7, second sliding axle holds 19 along valve body axial directional distribution, and first thrust bearing 8, the second thrust bearing 18 are along valve body radial direction
Directional spreding.The top bearing shell 20, lower bearing 5 left and right sides be all made of stop pin 6 and connect with the auxiliary valve body 12 of two sides.
Valve rod and core are fitted close in the present embodiment, and it is excessive to reduce the return difference as caused by driving member gap, are improved
Degree of regulation；The boss structure of valve rod can prevent the weight because of valve rod from accelerating the abrasion of core, while prevent from causing due to high pressure
Valve rod flies out, and guarantees that valve rod can safely and reliably work；And then it solves ball-valve valve rod in the prior art and is directly mounted at ball
On core, valve rod weight increases the frictional force of core rotation process, accelerates the problem of abrasion of core.
Using top bearing shell, the fixed core of lower axle tile structure, it is ensured that core will not shift in total travel movement.Top bearing shell,
Lower bearing and auxiliary valve body fix the axial movement of core jointly, and pressure medium and core Gravitative Loads power can be made to generate valve seat
Influence is smaller, can eliminate the out-of-balance force acted on valve rod, and valve rod is avoided to lead to torque because being generated amount of deflection by axial thrust
Increase.First sliding axle is held, second sliding axle is held for reducing frictional resistance, and the first thrust bearing, the second thrust bearing are for holding
Ensure the stable rotation of core while by xial feed；Each sliding bearing and thrust bearing structure can effectively reduce friction
Power, the service life for reducing driving torque, improving valve inner member.
Embodiment 4:
A kind of double-valve-seat regulation ball valve as shown in Figure 1 to Figure 3, comprising: valve body, valve seat 9, spool, top bearing shell 20, lower axle
Watt 5, valve rod 24, valve deck 25.
The valve body uses three-body type structure, including a main valve body 1 and two auxiliary valve bodies 12, main valve body 1 and auxiliary valve body
Using the metal serrated gasket sealing of covering soft graphite between 12, is fastened using high-intensitive bolt 3, nut 2, be suitable for height
The use occasion that warm high pressure and operating condition often change.
The valve seat 9 is double-valve-seat metal hard sealing structure, including two valve seats 9.
The valve seat 9 is installed in auxiliary valve body 12 by valve seat bracket 15.The enclosed watch that the valve seat 9 is contacted with core 10
Surface build-up welding nickel-base alloy 17.Circumference uniform distribution multiple groups preloading spring 14 between the valve seat 9 and auxiliary valve body 12, so that valve seat 9 and ball
10 surface of core forms uniform axial force, it is ensured that the good seal performance of valve seat 9 and valve core chamber.The spring 14 is installed on spring
In seat 13,14 both ends of spring are abutted with valve seat bracket 15 and auxiliary valve body 12 respectively.9 outer circle of valve seat and 12 inner circle of auxiliary valve body it
Between using graphite-seal ring seal.
The spool includes that core 10 and flow adjust window 11.The core 10 uses integral ball, and core 10 opens O
The through-hole of type.The flow adjusts window 11 and is installed in the O-shaped hole of valve inlet side, and flow adjusts 11 outer surface of window
For spherical surface, spherical radius is greater than 10 radius of core, and the flow in the rotation process of core 10 is avoided to adjust window 11
Spherical surface is contacted with valve seat 9.The flow adjusts the installation outside diameter of window 11 and the internal diameter in O-shaped hole cooperates processing, weldering
Connect fixation.The shape that the flow adjusts window 11 is U-shaped, and flow-adjusting characteristics are equal percentage.It is that flow adjusts window
11 are partially submerged into the O-shaped hole of core, and flow, which adjusts window and is located at part outside O-shaped hole, has spherical surface, the spherical surface
Diameter be greater than core diameter, avoid in core rotation process with valve seat interfere.
To ensure that core 10 will not shift in total travel movement, using top bearing shell 20, the fixed core of 5 structure of lower bearing
10.First sliding axle is set between the lower end and lower bearing 5 of the core 10 and holds the 7, first thrust bearing 8, the upper end of core 10
Second sliding axle is set between top bearing shell 20 and holds the 19, second thrust bearing 18.
The top bearing shell 20, lower bearing 5 are installed in main valve body 1, the left and right sides difference of top bearing shell 20, lower bearing 5
It is connect using stop pin 6 with the auxiliary valve body 12 of the left and right sides.The fixed core 10 of the top bearing shell 20, lower bearing 5 and auxiliary valve body 12
Axial movement, the influence that pressure medium and 10 Gravitative Loads power of core can be made to generate valve seat 9 is smaller, can eliminate and act on valve
Out-of-balance force on bar 24 avoids valve rod 24 from causing torque to increase because being generated amount of deflection by axial thrust.
The lower end of the valve rod 24 is plum blossom-shaped structure, cooperates with the plum blossom-shaped close structure of 10 upper end of core, can reduce
The return difference as caused by driving member gap is excessive, improves degree of regulation.Boss structure is arranged in the middle and lower part outer circle of the valve rod 24,
Its self weight is carried by main valve body 1.The boss upper surface of the valve rod 24 can prevent from making due to high pressure by 25 mechanical position limitation of valve deck
It flies out at valve rod 24, it is ensured that valve rod 24 being capable of work reliably and with long-term.Third is arranged between the valve rod 24 and valve deck 25 to slide
Bearing 23, the lower surface of 24 boss of valve rod and 1 groove upper surface of main valve body are arranged third thrust bearing 21,24 boss of valve rod it is upper
4th thrust bearing 22 is set between 25 lower surface of surface and valve deck.
The present embodiment is bimetallic valve base sealing structure, can avoid valve caused by trim deformation under high pressure operating condition and embraces
Extremely, valve two way seal performance is improved；The axial movement of top bearing shell, the fixed core of lower bearing and auxiliary valve body can make pressure medium and
The influence that core Gravitative Loads power generates valve seat is smaller, can eliminate the out-of-balance force acted on valve rod, avoid valve rod because by
Axial thrust generates amount of deflection and torque is caused to increase；Valve rod is cooperated with core by plum blossom-shaped close structure, can be reduced due to passing
Return difference caused by moving part gap is excessive, improves degree of regulation；The boss structure of valve rod can prevent the weight because of valve rod from accelerating core
Abrasion, while preventing from causing valve rod to fly out due to high pressure, guarantee that valve rod can safely and reliably work；Sliding bearing and thrust
The service life that bearing arrangement can effectively reduce frictional force, reduce driving torque, improve valve inner member.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of double-valve-seat regulation ball valve, including valve body, valve seat, spool, which is characterized in that the valve body include main valve body (1),
It is separately fixed at two auxiliary valve bodies (12) of main valve body (1) two sides；The valve seat (9) totally two, valve seat (9) are located at two secondary valves
Between body (12), and two valve seats (9) are located at the opposite sides of valve body radial direction；The spool be located at two valve seats (9) it
Between.
2. a kind of double-valve-seat regulation ball valve according to claim 1, which is characterized in that the main valve body (1) and auxiliary valve body
(12) it is fixedly connected between by bolt (3), gasket seal (4) is set between main valve body (1) and auxiliary valve body (12).
3. a kind of double-valve-seat regulation ball valve according to claim 1, which is characterized in that the valve seat (9) passes through valve seat branch
Frame (15) is installed in auxiliary valve body (12)；Several groups spring (14) are evenly distributed between the valve seat (9) and auxiliary valve body (12),
Spring (14) both ends are abutted with valve seat bracket (15) and auxiliary valve body (12) respectively.
4. a kind of double-valve-seat regulation ball valve according to claim 3, which is characterized in that the valve seat (9) contacts with spool
Sealing surfaces built-up welding nickel-base alloy (17)；Sealing ring is used between valve seat (9) lateral wall and auxiliary valve body (12) inner sidewall
(16) it seals.
5. a kind of double-valve-seat regulation ball valve according to claim 1, which is characterized in that the spool include core (10),
Flow adjusts window (11), and for the core (10) in spherical, core opens up through-hole on (10)；The flow adjusts window (11) peace
Loaded on core (10) in the through-hole of valve inlet side, flow adjusts window (11) and is fixedly connected with core (10).
6. a kind of double-valve-seat regulation ball valve according to claim 5, which is characterized in that further include and the core (10) phase
Valve rod (24) even, the boss of the external setting annular of valve rod (24), further includes the valve deck (25) being set on valve rod (24), described
The boss is pressed on main valve body (1) by valve deck (25).
7. a kind of double-valve-seat regulation ball valve according to claim 6, which is characterized in that the valve rod (24) is from main valve body
(1) upper end is stretched out, and valve deck (25) is located at the top of boss, is bolted between valve rod (25) and main valve body (1).
8. a kind of double-valve-seat regulation ball valve according to claim 7, which is characterized in that the valve rod (24) and valve deck (25)
Between be arranged third sliding bearing (23), third is set between the lower surface of valve rod (24) boss and the upper surface of main valve body (1)
The 4th thrust bearing (22) is arranged in thrust bearing (21) between the upper surface and valve deck (25) lower surface of valve rod (24) boss.
9. a kind of double-valve-seat regulation ball valve according to claim 1, which is characterized in that further include being installed on main valve body (1)
Interior top bearing shell (20), lower bearing (5), the top bearing shell (20), lower bearing (5) are located at the opposite end of core (10),
First sliding axle is set between one end and lower bearing (5) of core (10) and holds (7), the first thrust bearing (8), core (10) it is another
Second sliding axle is set between one end and top bearing shell (20) and holds (19), the second thrust bearing (18)；The first sliding axle is held
(7), second sliding axle holds (19) along valve body axial directional distribution, first thrust bearing (8), the second thrust bearing (18) edge
The distribution of valve body radial direction.
10. a kind of double-valve-seat regulation ball valve according to claim 9, which is characterized in that the top bearing shell (20), lower bearing
(5) left and right sides are all made of stop pin (6) and connect with the auxiliary valve body (12) of two sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910270359.3A CN109973678A (en) | 2019-04-04 | 2019-04-04 | A kind of double-valve-seat regulation ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910270359.3A CN109973678A (en) | 2019-04-04 | 2019-04-04 | A kind of double-valve-seat regulation ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109973678A true CN109973678A (en) | 2019-07-05 |
Family
ID=67082957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910270359.3A Pending CN109973678A (en) | 2019-04-04 | 2019-04-04 | A kind of double-valve-seat regulation ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109973678A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI807439B (en) * | 2020-10-02 | 2023-07-01 | 英商克蘭流程技術有限公司 | Ball valve adaptor assembly |
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| CN205745405U (en) * | 2015-11-27 | 2016-11-30 | 中国空气动力研究与发展中心超高速空气动力研究所 | The quick ball valve of a kind of hard sealing |
| CN207864677U (en) * | 2018-01-05 | 2018-09-14 | 浙江中德自控科技股份有限公司 | A kind of ball valve |
| CN208519258U (en) * | 2018-08-01 | 2019-02-19 | 上海阀特流体控制阀门有限公司 | Ball valve |
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| CN201844052U (en) * | 2010-06-13 | 2011-05-25 | 无锡智能自控工程有限公司 | Rotating sphere adjusting valve |
| FR3007490A1 (en) * | 2013-06-25 | 2014-12-26 | Sainte Lizaigne Sa | SPHERICAL BALL VALVE WITH LOW MANOEUVRE TORQUE AND ADAPTED SEAT CERTIONING PIECE |
| CN203627875U (en) * | 2013-11-28 | 2014-06-04 | 克里特集团有限公司 | Ball valve with all-welded valve body |
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|---|---|---|---|---|
| TWI807439B (en) * | 2020-10-02 | 2023-07-01 | 英商克蘭流程技術有限公司 | Ball valve adaptor assembly |
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Application publication date: 20190705 |