CN104421447A - Ultra-high temperature multi-seal ball valve and machining method of valve seat sealing surface thereof - Google Patents

Ultra-high temperature multi-seal ball valve and machining method of valve seat sealing surface thereof Download PDF

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Publication number
CN104421447A
CN104421447A CN201310380019.9A CN201310380019A CN104421447A CN 104421447 A CN104421447 A CN 104421447A CN 201310380019 A CN201310380019 A CN 201310380019A CN 104421447 A CN104421447 A CN 104421447A
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CN
China
Prior art keywords
valve seat
concave spherical
spheroid
spherical surface
ball
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Granted
Application number
CN201310380019.9A
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Chinese (zh)
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CN104421447B (en
Inventor
王张勇
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Shanghai Newking Valve Co ltd
Original Assignee
SHANGHAI NUWAVE INDUSTRIAL EQUIPMENT Co Ltd
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Priority to CN201310380019.9A priority Critical patent/CN104421447B/en
Publication of CN104421447A publication Critical patent/CN104421447A/en
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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B15/00—Machines or devices designed for grinding seat surfaces; Accessories therefor
    • B24B15/04—Machines or devices designed for grinding seat surfaces; Accessories therefor on valve members
    • 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
    • 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
    • F16K5/0694—Spindle sealings
    • 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 an ultra-high temperature multi-seal ball valve and a machining method of a valve seat sealing surface thereof. The Ultra-high temperature multi-seal ball valve comprises a ball body, a left valve seat and a right valve seat; the sealing surface of the left valve seat and the ball body and the sealing surface of the right valve seat and the ball body are provided with a first concave spherical surface and a second concave spherical surface respectively; each first concave spherical surface and the corresponding second concave spherical surface are connected with each other; the radius of each first concave spherical surface is equal to that of the ball body; the radius of each second concave spherical surface is larger than that of the ball body. The machining method comprises the following steps of step 1, installing the valve seat to be machined on a valve seat tooling of a tooling; step 2, installing the ball body on a ball body tooling of the tooling to grind the valve seat to be machined and the ball body; step 3, grinding the valve seat to be machined and a first process ball. The ultra-high temperature multi-seal ball valve and the machining method of the valve seat sealing surface thereof is excellent in sealing performance, suitable for size changes caused by expansion and contraction due to the temperature change of the ball body, reliable in sealing and free of leakage point.

Description

The processing method of the many seal ball-valves of superhigh temperature and sealing surface of seat thereof
Technical field
The present invention relates to the processing method of the many seal ball-valves of a kind of superhigh temperature and sealing surface of seat thereof.
Background technique
The sealing pair of the many seal ball-valves of current superhigh temperature is all through spheroid valve seat pairing grinding, is finally formed and reaches close contact, in the hope of the sealing effect of the best.But any object all can have the characteristic of expanding with heat and contract with cold along with temperature variation, and different objects, the amplitude of different size change is not identical.Therefore, the good again sealing pair of match grinding, at different temperatures because the shrinkage between spheroid and valve seat is different, also can causes surface of contact size inconsistent, make to produce micro-gap between valve seat and spheroid, and cause leaking, especially temperature raises more much more obvious.
Summary of the invention
Easily produce micro-gap and the easy defect such as leakage when the technical problem to be solved in the present invention is to overcome that in prior art, temperature variation is larger between valve seat and spheroid, the processing method of the many seal ball-valves of a kind of superhigh temperature and sealing surface of seat thereof is provided.
The present invention solves above-mentioned technical problem by following technical proposals:
The many seal ball-valves of a kind of superhigh temperature, comprise: a spheroid, a left valve seat and a right valve seat, described spheroid is located between described left valve seat and described right valve seat, its feature is, the sealing surface that described left valve seat, described right valve seat contact with described spheroid is equipped with one first concave spherical surface and one second concave spherical surface, and described first concave spherical surface and accordingly described second concave spherical surface are interconnected;
Wherein, the radius of described first concave spherical surface is equal with the radius of described spheroid, and the radius of described second concave spherical surface is greater than the radius of described spheroid.
In this programme, adopt the structural type of above-mentioned sealing surface, each second concave spherical surface when temperature is higher causes spheroid to expand still can be closely cooperated to the rear corresponding spheroid that expands, the sealability of sealing pair is higher, prevents Yin Gaowen from applying, valve seat and the interior leakage that sphere size changes or sealing pair lost efficacy and caused, in addition, under normal temperature, each described first concave spherical surface and spheroid also can closely cooperate, and the sealability of sealing pair is excellent.
Preferably, the sealing surface of described left valve seat, described right valve seat also comprises respectively one the 3rd concave spherical surface, described first concave spherical surface is arranged at accordingly between described second concave spherical surface and the 3rd concave spherical surface, and described first concave spherical surface and corresponding 3rd concave spherical surface are interconnected, the radius of described 3rd concave spherical surface is less than the radius of described spheroid.
In this programme, the sealing surface of described left valve seat and right valve seat all also comprises one the 3rd concave spherical surface, make each second concave spherical surface when temperature is lower causes spheroid to shrink still can closely cooperate to the rear corresponding spheroid that expands like this, the sealability of sealing pair is higher, avoids the danger of leakage.
Preferably, the many seal ball-valves of described superhigh temperature also comprise a left valve barrel and a right valve barrel, are respectively equipped with an elastic component between described left valve seat and described left valve barrel, between described right valve seat and described right valve barrel.
Preferably, described elastic component is a butterfly spring or a cylindrical spring.
Preferably, the many seal ball-valves of described superhigh temperature also comprise a valve rod, one end of described valve rod is rotationally connected through described right valve barrel and described spheroid, and the other end is connected with a final controlling element by a connection piece, is provided with a stuffing box packing between described valve rod and described right valve barrel.
Preferably, described stuffing box packing is teflon or graphite ring.
Present invention also offers the processing method of the sealing surface of seat of the many seal ball-valves of a kind of superhigh temperature, the many seal ball-valves of described superhigh temperature are described above, and its feature is, it comprises the following steps:
S 1, a valve seat to be processed is arranged in a valve seat frock of a frock;
S 2, by described sphere installation in a spheroid frock of described frock, make to form a relative rotary motion between described spheroid and described valve seat to be processed, thus make described spheroid and valve seat to be processed carry out grinding to form described first concave spherical surface;
S 3, one first technological ball is arranged in described spheroid frock, make to form a relative rotary motion between described first technological ball and described valve seat to be processed, thus make described first technological ball and described valve seat to be processed carry out grinding to form described second concave spherical surface.
In this programme, at machinery production manufacture field, frock and production process technology equipment: the general name referring to various instruments used in manufacture process.Comprise cutter/fixture/mould/measurer/cubing/accessory/fitter's tool/working position apparatus etc.First technological ball is ground valve seat to be processed and obtains the second concave spherical surface, the first technological ball cost is low, and without the need to using as Sealing, technique is simple, and processing cost is low.
Preferably, described step S 2with step S 3between further comprising the steps of:
S 21, one second technological ball is arranged in described spheroid frock, make to form a relative rotary motion between described second technological ball and described valve seat to be processed, thus make described second technological ball and described valve seat to be processed carry out grinding formation 1 the 3rd concave spherical surface.
In this programme, the second technological ball is ground valve seat to be processed and obtain the 3rd concave spherical surface, the second technological ball cost is low, and without the need to using as Sealing, technique is simple, and processing cost is low.
Preferably, described step S 3further comprising the steps of afterwards:
S 31, one second technological ball is arranged in described spheroid frock, make to form a relative rotary motion between described second technological ball and described valve seat to be processed, thus make described second technological ball and described valve seat to be processed carry out grinding formation 1 the 3rd concave spherical surface.
In this programme, the second technological ball is ground valve seat to be processed and obtain the 3rd concave spherical surface, the second technological ball cost is low, and without the need to using as Sealing, technique is simple, and processing cost is low.
Preferably, described step S 2specifically comprise the following steps:
S 211, by described sphere installation in a spheroid frock of described frock, drive described spheroid frock, described spheroid rotates, and drives described valve seat frock simultaneously, and described valve seat to be processed rotates, and the rotational speed of described valve seat to be processed is less than the rotational speed of described spheroid.
In this programme, the rotational speed of described valve seat to be processed is less than the rotational speed of spheroid, can ensure the better effects if that valve seat to be processed grinds.
On the basis meeting related domain general knowledge, above-mentioned each optimum condition, can combination in any, obtains the preferred embodiments of the invention.
Positive progressive effect of the present invention is:
The present invention has excellent sealability, is applicable to the dimensional changes brought of expanding with heat and contract with cold that spheroid causes in temperature variation, and sealing is reliable, No leakage point, prevents Yin Gaowen from applying, valve seat and the interior leakage that sphere size changes or sealing pair lost efficacy and caused, meanwhile, technique is simple, and processing cost is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of the preferred embodiment of the many seal ball-valves of superhigh temperature of the present invention.
Fig. 2 is A portion enlarged view in Fig. 1.
Fig. 3 is the schematic diagram of the preferred embodiment of the processing method of sealing surface of seat of the present invention.
Description of reference numerals:
Left valve barrel: 1 right valve barrel: 2 left valve seats: 3
Right valve seat: 4 spheroids: 5 valve rods: 6
Stuffing box packing: 7 links: 8 final controlling element: 9
Elastic component: 10 first concave spherical surfaces: 11 second concave spherical surfaces: 12
3rd concave spherical surface: 13 valve seats to be processed: 14 spheroid frocks: 15
First main shaft: 16 valve seat frocks: 17 second main shafts: 18
Chuck: 19 eccentric main axis: 20
Embodiment
Present pre-ferred embodiments is provided, to describe technological scheme of the present invention in detail below in conjunction with accompanying drawing.
Embodiment 1
As shown in Figure 1, the many seal ball-valves of a kind of superhigh temperature of the present invention comprise a spheroid 5, left valve seat 3, right valve seat 4, left valve barrel 1, right valve barrel 2 and a valve rod 6.
Wherein, one end of described valve rod 6 to be arranged in right valve barrel 2 and to be in transmission connection with described spheroid 5, and its other end is connected with a final controlling element 9 by a connection piece 8.A stuffing box packing 7 is provided with between described valve rod 6 and right valve barrel 2.Described stuffing box packing 7 is nonmetallic material, as PTFE(teflon) or reinforced graphite ring.
In addition, be equipped with an elastic component 10(between described left valve seat 3 and left valve barrel 1 and between described right valve seat 4 and right valve barrel 2 as shown in Figure 2), described elastic component makes to have pretightening force between left valve seat 3 and spheroid 5 and between right valve seat 4 and spheroid 5.Described elastic component is a butterfly spring or cylindrical spring.Meanwhile, the sealing between described left valve seat 3 and left valve barrel 1 and between described right valve seat 4 and right valve barrel 2 can adopt metallic hard to boldly confront a powerful opponent and seal, nonmetal sealing gasket also can be adopted to seal.
In addition, as shown in Fig. 1 ~ 2, described spheroid 5 is located between left valve seat 3 and right valve seat 4.The sealing surface that described left valve seat 3, right valve seat 4 contact with described spheroid 5 includes one first concave spherical surface 11 and one second concave spherical surface 12, described first concave spherical surface 11 and being interconnected between described second concave spherical surface 12 accordingly.Further, the first concave spherical surface 11 and the second concave spherical surface 12 are by a camber line L 1(not shown) contacts.
Wherein, the radius of the first concave spherical surface 11 is equal with the radius of spheroid 5, and the radius of the second concave spherical surface 12 is greater than the radius of spheroid 5.Make each second concave spherical surface 12 when temperature is higher causes spheroid 5 to expand still can closely cooperate to the rear corresponding spheroid 5 that expands like this, the sealability of sealing pair is higher, prevent Yin Gaowen from applying, the interior leakage that valve seat and spheroid 5 dimensional changes or sealing pair lost efficacy and caused, in addition, under normal temperature, each described first concave spherical surface 11 also can closely cooperate with spheroid 5, and the sealability of sealing pair is excellent.
Further, as shown in Figure 2, the sealing surface of described left valve seat 3 and right valve seat 4 also comprises one the 3rd concave spherical surface 13 respectively.First concave spherical surface 11 is arranged between corresponding second concave spherical surface 12 and the 3rd concave spherical surface 13.Be interconnected between described first concave spherical surface 11 and corresponding 3rd concave spherical surface 13, and the first concave spherical surface 11 and the second concave spherical surface 12 are by a camber line L 2(not shown) contacts.The radius of the 3rd concave spherical surface 13 is less than the radius of spheroid 5.
The sealing surface of described left valve seat 3 and right valve seat 4 all also comprises one the 3rd concave spherical surface 13, make each second concave spherical surface 12 when temperature is lower causes spheroid 5 to shrink still can closely cooperate to the rear corresponding spheroid 5 that expands like this, the sealability of sealing pair is higher, avoids the danger of leakage.
In the present embodiment, in order to overcome due to temperature variation bring expand with heat and contract with cold produce dimensional changes, so adopt many spheres technology on valve seat, to overcome the problems referred to above.Specifically processing on valve seat exactly, reprocessing out the sealing surface of the size being greater than spheroid 5 and the size being less than spheroid 5, to adapt to the ball seal under different conditions.The many seal ball-valves of described superhigh temperature are under temperature variation state, and when valve sealing element temperature influence produces and expands with heat and contract with cold change, valve seal pair still can keep good sealability.
As shown in Figure 3, present invention also offers the processing method of the sealing surface of seat of the many seal ball-valves of a kind of superhigh temperature, the many seal ball-valves of described superhigh temperature are described above, and it comprises the following steps:
Step 100, is arranged on a valve seat 14 to be processed in a valve seat frock 17 of a frock.
Step 101, is arranged on described spheroid 5 in a spheroid frock 15 of described frock, makes to form a relative rotary motion between described spheroid 5 and described valve seat to be processed 14, thus makes described spheroid 5 and valve seat to be processed carry out grinding to form described first concave spherical surface 11.
In the present embodiment, only need ensure to form a relative rotary motion between spheroid 5 and valve seat to be processed 14, certainly, in operation, can make in spheroid 5 and valve seat 14 to be processed that any one keeps transfixion, another rotation; In addition, also can ensure both to rotate, only ensure that spheroid 5 is different from the rotational speed of valve seat 14 to be processed.
In the present embodiment, one first main shaft 16 of spheroid frock 15 is connected with one first motor-driven, and output shaft and an eccentric main axis 20 of spheroid frock 15 are in transmission connection, and spheroid 5 is fixed on eccentric main axis 20.Therefore, in the operating process of reality, the output shaft rotation of the first driven by motor spheroid frock 15 can be started, thus drive spheroid 5 to swing around the center line of the output shaft of spheroid frock 15.
In addition, as shown in Figure 3, one end of one second main shaft 18 of valve seat frock 17 is connected with one second motor-driven, and a chuck 19 is sheathed on the second main shaft 18, and is in transmission connection with the second main shaft 18, and valve seat 14 to be processed is connected on chuck 19.Therefore, in the operating process of reality, second main shaft 18 that can start the second driven by motor valve seat frock 17 rotates, thus drives valve seat 14 to be processed to rotate around the center line of the second main shaft 18.
In this step, valve seat 14 to be processed is ground with spheroid 5, obtains ideal standard sealing pair by grinding.
Step 102, one first technological ball is arranged in described spheroid frock 15, make to form a relative rotary motion between described first technological ball and described valve seat to be processed 14, thus make described first technological ball and described valve seat to be processed 14 carry out grinding to form described second concave spherical surface 12.Wherein, the radius of the first technological ball is greater than the radius of described spheroid 5.
In the process, first technological ball is arranged in spheroid frock, before grinding, the first technological ball contacts with the sideline, one end of the sealing surface of valve seat to be processed, after grinding, the first technological ball and valve seat to be processed are that face contacts, the Line of contact of two sidelines difference the first technological balls of surface of contact and the initial grinding of valve seat to be processed and camber line L 1(not shown).
In the present embodiment, the first technological ball being ground valve seat to be processed, to obtain the second concave spherical surface 12, first technological ball cost low, and without the need to using as Sealing, technique is simple, and processing cost is low.Described sealing surface of seat adds man-hour, adopts the technological ball of different-diameter to process, makes many ball face sealings face sealing surface of seat existing simultaneously different-diameter.
Embodiment 2
The present embodiment comprises the institute of the processing method of sealing surface of seat described in embodiment 1 in steps, and its difference is:
Described step 101 specifically comprises the following steps:
Step 101 ', by described sphere installation in a spheroid frock of described frock, drive described spheroid frock, described spheroid rotates, drive described valve seat frock, described valve seat to be processed rotates, and the rotational speed of described valve seat to be processed is less than the rotational speed of described spheroid simultaneously.
In the present embodiment, the rotational speed of described valve seat to be processed is less than the rotational speed of spheroid, can ensure the better effects if that valve seat to be processed grinds.Certainly, in the application of reality, also can make valve seat transfixion to be processed, spheroid rotates; Or make spheroid transfixion, valve seat to be processed rotates, and only need ensure there is relative rotary motion between valve seat to be processed and spheroid.
Embodiment 3
The present embodiment comprises the institute of the processing method of sealing surface of seat described in embodiment 1 in steps, and its difference is:
The sealing surface of described left valve seat, described right valve seat all also comprises one the 3rd concave spherical surface, comprises the following steps between described step 101 and step 102:
Step 101 ' ', one second technological ball is arranged in described spheroid frock, make to form a relative rotary motion between described second technological ball and described valve seat to be processed, thus make described second technological ball and described valve seat to be processed carry out grinding formation 1 the 3rd concave spherical surface.The radius of described second technological ball is less than the radius of described spheroid.
In this process, the second technological ball is arranged in spheroid frock, the camber line L of the sealing surface of the second technological ball and valve seat to be processed before grinding 2(not shown) contacts, and after grinding, the second technological ball and valve seat to be processed are that face contacts.
In this programme, the second technological ball is ground valve seat to be processed and obtain the 3rd concave spherical surface, the second technological ball cost is low, and without the need to using as Sealing, technique is simple, and processing cost is low.
Embodiment 4
The present embodiment comprises the institute of the processing method of sealing surface of seat described in embodiment 1 in steps, and its difference is:
Further comprising the steps of after described step 102:
Step 102 ', one second technological ball is arranged in described spheroid frock, make to form a relative rotary motion between described second technological ball and described valve seat to be processed, thus making described second technological ball and described valve seat to be processed carry out grinding formation 1 the 3rd concave spherical surface, the radius of described second technological ball is less than the radius of described spheroid.
In this programme, the second technological ball is ground valve seat to be processed and obtain the 3rd concave spherical surface, the second technological ball cost is low, and without the need to using as Sealing, technique is simple, and processing cost is low.
In sum, the present invention has excellent sealability, be applicable to the dimensional changes brought of expanding with heat and contract with cold that spheroid causes in temperature variation, sealing is reliable, and No leakage point, prevents Yin Gaowen from applying, valve seat and the interior leakage that sphere size changes or sealing pair lost efficacy and caused, meanwhile, technique is simple, and processing cost is low.
Although the foregoing describe the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is defined by the appended claims.Those skilled in the art, under the prerequisite not deviating from principle of the present invention and essence, can make various changes or modifications to these mode of executions, but these change and amendment all falls into protection scope of the present invention.

Claims (10)

1. the many seal ball-valves of superhigh temperature, comprise a spheroid, a left valve seat and a right valve seat, described spheroid is located between described left valve seat and described right valve seat, it is characterized in that, the sealing surface that described left valve seat, described right valve seat contact with described spheroid is equipped with one first concave spherical surface and one second concave spherical surface, and described first concave spherical surface and accordingly described second concave spherical surface are interconnected;
Wherein, the radius of described first concave spherical surface is equal with the radius of described spheroid, and the radius of described second concave spherical surface is greater than the radius of described spheroid.
2. the many seal ball-valves of superhigh temperature as claimed in claim 1, it is characterized in that, the sealing surface of described left valve seat, described right valve seat also comprises respectively one the 3rd concave spherical surface, described first concave spherical surface is arranged at accordingly between described second concave spherical surface and the 3rd concave spherical surface, and described first concave spherical surface and corresponding 3rd concave spherical surface are interconnected, the radius of described 3rd concave spherical surface is less than the radius of described spheroid.
3. the many seal ball-valves of superhigh temperature as claimed in claim 1, it is characterized in that, the many seal ball-valves of described superhigh temperature also comprise a left valve barrel and a right valve barrel, are respectively equipped with an elastic component between described left valve seat and described left valve barrel, between described right valve seat and described right valve barrel.
4. the many seal ball-valves of superhigh temperature as claimed in claim 3, it is characterized in that, described elastic component is a butterfly spring or a cylindrical spring.
5. the many seal ball-valves of superhigh temperature as claimed in claim 3, it is characterized in that, the many seal ball-valves of described superhigh temperature also comprise a valve rod, one end of described valve rod is rotationally connected through described right valve barrel and described spheroid, the other end is connected with a final controlling element by a connection piece, is provided with a stuffing box packing between described valve rod and described right valve barrel.
6. the many seal ball-valves of superhigh temperature as claimed in claim 5, it is characterized in that, described stuffing box packing is teflon or graphite ring.
7. a processing method for the sealing surface of seat of the many seal ball-valves of superhigh temperature, the many seal ball-valves of described superhigh temperature are according to any one of claim 1 ~ 6, and it is characterized in that, it comprises the following steps:
S 1, a valve seat to be processed is arranged in a valve seat frock of a frock;
S 2, by described sphere installation in a spheroid frock of described frock, make to form a relative rotary motion between described spheroid and described valve seat to be processed, thus make described spheroid and valve seat to be processed carry out grinding to form described first concave spherical surface;
S 3, one first technological ball is arranged in described spheroid frock, make to form a relative rotary motion between described first technological ball and described valve seat to be processed, thus make described first technological ball and described valve seat to be processed carry out grinding to form described second concave spherical surface.
8. the processing method of sealing surface of seat as claimed in claim 7, is characterized in that, described step S 2with step S 3between further comprising the steps of:
S 21, one second technological ball is arranged in described spheroid frock, make to form a relative rotary motion between described second technological ball and described valve seat to be processed, thus make described second technological ball and described valve seat to be processed carry out grinding formation 1 the 3rd concave spherical surface.
9. the processing method of sealing surface of seat as claimed in claim 7, is characterized in that, described step S 3further comprising the steps of afterwards:
S 31, one second technological ball is arranged in described spheroid frock, make to form a relative rotary motion between described second technological ball and described valve seat to be processed, thus make described second technological ball and described valve seat to be processed carry out grinding formation 1 the 3rd concave spherical surface.
10. the processing method of sealing surface of seat as claimed in claim 7, is characterized in that, described step S 2specifically comprise the following steps: S 211, by described sphere installation in a spheroid frock of described frock, drive described spheroid frock, described spheroid rotates, and drives described valve seat frock simultaneously, and described valve seat to be processed rotates, and the rotational speed of described valve seat to be processed is less than the rotational speed of described spheroid.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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CN202132539U (en) * 2011-07-07 2012-02-01 保一集团有限公司 Air inlet ball valve special for tank container
CN103032599A (en) * 2012-11-09 2013-04-10 浙江理工大学 Ball valve with circular arc transition-type anti-erosion seal valve seat

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US4236691A (en) * 1978-11-29 1980-12-02 Jamesbury Corporation Ball valve to relieve cavity pressure
US4795133A (en) * 1986-12-06 1989-01-03 B + S Metalpraecis Gesellschaft Fur Metallformgebung M.B.H. Ball valve with a ceramic valve ball and ceramic seat rings
CN201318469Y (en) * 2008-12-10 2009-09-30 福建菲达阀门有限公司 Valve seat of ball valve
CN201723765U (en) * 2010-07-06 2011-01-26 浙江精嘉阀门有限公司 Double seal floating-type ball valve
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CN102155553A (en) * 2011-04-22 2011-08-17 浙江中南阀门有限公司 High-temperature and high-pressure resistant metallic sealing ball valve
CN202132539U (en) * 2011-07-07 2012-02-01 保一集团有限公司 Air inlet ball valve special for tank container
CN103032599A (en) * 2012-11-09 2013-04-10 浙江理工大学 Ball valve with circular arc transition-type anti-erosion seal valve seat

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Publication number Priority date Publication date Assignee Title
CN110319229A (en) * 2019-07-04 2019-10-11 浙江石化阀门有限公司 The processing technology of hard seal ball valve and double spherical surface valve seats with double spherical surface valve seats
CN110319229B (en) * 2019-07-04 2020-04-24 浙江石化阀门有限公司 Hard sealing ball valve with double-spherical-surface valve seat and machining process of double-spherical-surface valve seat

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