CN203548978U - Ball valve with single-valve-seat bidirectional sealing structure - Google Patents
Ball valve with single-valve-seat bidirectional sealing structure Download PDFInfo
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- CN203548978U CN203548978U CN201320767439.8U CN201320767439U CN203548978U CN 203548978 U CN203548978 U CN 203548978U CN 201320767439 U CN201320767439 U CN 201320767439U CN 203548978 U CN203548978 U CN 203548978U
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- valve seat
- valve
- step body
- spheroid
- left body
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- 238000007789 sealing Methods 0.000 title claims abstract description 57
- 230000002457 bidirectional effect Effects 0.000 title abstract 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 25
- 238000005520 cutting process Methods 0.000 claims description 16
- 238000001125 extrusion Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 9
- 238000010276 construction Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 239000007790 solid phase Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model discloses a ball valve with a single-valve-seat bidirectional sealing structure. Based on the structural design of the single-valve-seat bidirectional sealing structure, the whole ball valve is only provided with one valve seat, a ball is not eccentric, and the downstream portion of the valve is not provided with a valve seat structure. Therefore, the problem of valve core locking caused by a delivered medium accumulated in a middle cavity is solved, and the problem that an eccentric rotating valve is poor in sealing accuracy and very easily causes leakage is also solved.
Description
Technical field
The utility model relates to valve, specifically single valve seat two-way sealing structure ball valve.
Background technique
In the industry production processes such as oil, petrochemical industry, chemical industry, the energy, mineral products, be accompanied by the conveying of a lot of solid phases, gas-solid phase, liquid-solid phase medium, domestic for this operating mode, to requiring the domestic manufacturing firm of valve of tight seal to adopt double-valve-seat form, to the less demanding valve of blow-by, domestic manufacturing firm generally adopts camflex valve.But the valve of domestic manufacturing firm in use embodies two kinds of situations: one, the repair cycle of the valve of employing double-valve-seat sealing is too short, in use easily cause valve cavity to block, cannot switch and cause valve stem crack and downstream valve seat washes away damage; Two, in use, medium is easily bonded on ball valve the valve of employing eccentric rotary ball valve, makes the sealability of valve worse and worse, and causes finally stuck.The sealing configuration of being badly in need of now the valve to being applied in this operating mode is made necessary architecture advances and could be met the needs of production completely, realizes non-maintainingly, falls the management tactics of cost.
Model utility content
The purpose of this utility model is to provide a kind of single valve seat two-way sealing structure ball valve, can solve between valve seat and valve body static seal and leak, the problem of the valves leakage causing.
The purpose of this utility model is achieved through the following technical solutions: single valve seat two-way sealing structure ball valve, comprise valve body and left body, valve body and left body are oppositely arranged rear formation lumen, in lumen, be provided with spheroid, spheroid is connected with upper stem seal portion, upper stem seal portion, from spheroid extends to lumen, is wherein provided with valve base sealing portion between left body and spheroid, valve base sealing portion comprises valve seat and at the seal ring between valve seat and left body and the spring between valve seat and left body, at medium upstream, point in the direction in medium downstream, described left body comprises the left body first step body of integrated connection successively, left body second step body, left body the 3rd step body, left body the 4th step body, and described valve seat comprises valve seat first step body, valve seat second step body, valve seat the 3rd step body of integrated connection successively, the internal diameter that the internal diameter that the internal diameter of left body first step body is less than left body second step body is less than left body the 3rd step body is less than the internal diameter of left body the 4th step body, the external diameter that the external diameter of valve seat first step body is less than valve seat second step body is less than the external diameter of valve seat the 3rd step body, wherein, the internal diameter of left body second step body equals the external diameter of valve seat first step body, the internal diameter of left body the 4th step body equals the external diameter of valve seat the 3rd step body, seal ring is positioned at left body second step body, left body the 3rd step body, valve seat first step body, in the cavity that valve seat second step body forms, spring is between left body the 3rd step body and valve seat the 3rd step body, and the axis of spring is parallel with the direction that medium upstream points to medium downstream, one end of spring and valve seat the 3rd step body is abutted against towards medium upstream one side, the other end of spring extends into left body the 3rd step body inside.
The utility model improves from the valve seat construction of valve, need to solve two large problems.
1, in the process of fed sheet of a media, avoid medium to pile up at valve cavity as far as possible, avoid valve ball in switching process, medium to be pushed, prevent that medium is residual.
2, make as far as possible valve realize two way sealed, avoid downstream media to be back in upstream line.
After this kind of architecture advances, through comparison, use the maintenance period of this kind of valve consistent with the cycle of device parking general overhaul, financial cost is 4/5 of double-valve-seat sealed valve, make pipeline fed sheet of a media more stable, permanent, both improved productivity effect, also saved financial cost.
Existing ball valve adopts double-valve-seat sealing configuration ball valve, because the lumen bore of valve is greater than valve flowing channel bore, in switching process, have dielectrically inhibitedly at valve seat place, downstream, cause medium constantly to pile up at valve middle part, valve ball locking cannot be moved the most at last, makes valve lose cutting function.Adopt the valve of eccentric rotary ball valve in use, because valve downstream is without valve seat, can not cause valve lumen media accumulation, but due in spheroid rotary course, spheroid can depart from valve seat, medium is easily bonded on ball valve surface and sealing surface of seat, at spheroid, again after rotary closing, medium can remain between valve seat and the sealing of spheroid, makes the sealability of valve worse and worse, and causing spheroid to rotate, spheroid is stuck the most at last.
The present invention adopts the design of single valve seat two-way sealing valve seat construction, and based on said structure design, whole ball valve only has a valve seat, and spheroid adopts not eccentric scheme, and valve downstream is without valve seat construction.So both solved carry medium lumen pile up cause spool locking problem, also solved camflex valve sealed precision poor, very easily leak problem.
Sealing direction one: medium upstream pressure is during higher than medium downstream pressure, normally sealing, when medium upstream inlet end pressure is greater than lower exit end pressure, medium upstream inlet end pressure promotion valve seat and spheroid sphere tight seal.Sealing principle: when medium upstream pressure is greater than medium downstream pressure: upstream pressure medium F1+spring-compensating pretightening force-downstream media realizes the sealing of spheroid and valve seat to the deboost F2 of valve seat.
Sealing direction two: medium downstream pressure is during higher than medium upstream pressure, oppositely sealing, when medium downstream pressure is greater than medium upstream pressure, medium downstream pressure promotion valve seat and spheroid sphere tight seal.Sealing principle: medium downstream pressure is greater than while going on a tour: pressure F1+spring-compensating pretightening force-downstream media that downstream media enters valve seat back realizes the sealing of spheroid and valve seat to the forward thrust F2 of valve seat.
Between valve seat the 3rd step body and spheroid, be provided with cutting edge body, cutting edge bulk-growth contacts in valve seat the 3rd step body and with spherome surface extruding.Prevent that the bonding processing mode of spherome surface from utilizing cutting edge body to carry out, spheroid adopts not eccentric design, and in sealing surface of seat, outside is all designed with cutting edge, and spheroid fits tightly with valve seat all the time in rotary course.If there is medium to be bonded on spherome surface, outer edge mouth will automated cleaning spheroid in spheroid rotary course in valve seat, guarantees all the time the sealability of valve seat and spheroid.
In spheroid, be provided with through hole and form spheroid runner, the diameter of spheroid runner equals left body minimum diameter.
In order to guarantee the assembling of spring, between valve seat the 3rd step body and left body the 3rd step body, there is gap.
In order to guarantee the assembling of seal ring, between valve seat second step body and left body second step body, there is gap.Left body the 3rd step body is 45 degree towards the one side angle of inclination of spheroid, and left body the 3rd step body is extrusion ball dignity towards the one side of spheroid, and cutting edge bulk-growth is in extrusion ball dignity.
Spheroid is also provided with lower stem seal portion away from upper stem seal portion one side, and lower stem seal portion is positioned between valve body and left body.Lower stem seal portion and upper stem seal portion form the support to spheroid.
The utility model has the advantage of: valve seat construction form is two way sealed, there is two-way blocking function, inside and outside sealing surface of seat, all there is Cutting Edge Design, can be in spheroid rotation process cleaning ball surface.
Accompanying drawing explanation
Fig. 1 is embodiment 1 structural drawing.
Fig. 2 is the structural drawing of valve base sealing portion.
Fig. 3 is the sealing direction one force structure figure of valve base sealing portion.
Fig. 4 is the sealing direction two force structure figure of valve base sealing portion.
Reference character in figure is expressed as: 1, upper stem seal portion; 2, valve body; 3, left body; 4, valve base sealing portion; 5, spheroid; 6, lower stem seal portion; 7, lumen; 8, valve seat; 9, spring; 10, seal ring; 11, cutting edge body, 51, spheroid runner; 31, left body first step body, 32, left body second step body; 33, left body the 3rd step body; 34, left body the 4th step body; 81, valve seat first step body; 82, valve seat second step body; 83, valve seat the 3rd step body.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but mode of execution of the present utility model is not limited to this.
Embodiment 1:
As shown in Figure 1.
As Fig. 1 and Fig. 2
Single valve seat two-way sealing structure ball valve, comprise valve body 2 and left body 3, valve body 2 and left body 3 are oppositely arranged rear formation lumen 7, in lumen 7, be provided with spheroid 5, spheroid is connected with upper stem seal portion 1, upper stem seal portion 1, from spheroid 5 extends to lumen 7, is wherein provided with valve base sealing portion 4 between left body 3 and spheroid, and valve base sealing portion 4 comprises valve seat 8 and at the seal ring 10 between valve seat and left body 3 and the spring 9 between valve seat and left body 3, at medium upstream, point in the direction in medium downstream, described left body 3 comprises the left body first step body 31 of integrated connection successively, left body second step body 32, left body the 3rd step body 33, left body the 4th step body 34, and described valve seat 8 comprises valve seat first step body 81, valve seat second step body 82, valve seat the 3rd step body 83 of integrated connection successively, the internal diameter that the internal diameter that the internal diameter of left body first step body 31 is less than left body second step body 32 is less than left body the 3rd step body 33 is less than the internal diameter of left body the 4th step body 34, the external diameter that the external diameter of valve seat first step body 81 is less than valve seat second step body 82 is less than the external diameter of valve seat the 3rd step body 83, wherein, the internal diameter of left body second step body 32 equals the external diameter of valve seat first step body 81, the internal diameter of left body the 4th step body 34 equals the external diameter of valve seat the 3rd step body 83, seal ring 10 is positioned at left body second step body 32, left body the 3rd step body 33, valve seat first step body 81, in the cavity that valve seat second step body 82 forms, spring 9 is between left body the 3rd step body 33 and valve seat the 3rd step body 83, and the axis of spring 9 is parallel with the direction that medium upstream points to medium downstream, one end of spring 9 and valve seat the 3rd step body 83 is abutted against towards medium upstream one side, the other end of spring 9 extends into left body the 3rd step body 33 inside.
The utility model improves from the valve seat construction of valve, need to solve two large problems.
1, in the process of fed sheet of a media, avoid medium to pile up at valve cavity as far as possible, avoid valve ball in switching process, medium to be pushed, prevent that medium is residual.
2, make as far as possible valve realize two way sealed, avoid downstream media to be back in upstream line.
After this kind of architecture advances, through comparison, use the maintenance period of this kind of valve consistent with the cycle of device parking general overhaul, financial cost is 4/5 of double-valve-seat sealed valve, make pipeline fed sheet of a media more stable, permanent, both improved productivity effect, also saved financial cost.
Existing ball valve adopts double-valve-seat sealing configuration ball valve, because the lumen bore of valve is greater than valve flowing channel bore, in switching process, have dielectrically inhibitedly at valve seat place, downstream, cause medium constantly to pile up at valve middle part, valve ball locking cannot be moved the most at last, makes valve lose cutting function.Adopt the valve of eccentric rotary ball valve in use, because valve downstream is without valve seat, can not cause valve lumen media accumulation, but due in spheroid rotary course, spheroid can depart from valve seat, medium is easily bonded on ball valve surface and sealing surface of seat, at spheroid, again after rotary closing, medium can remain between valve seat and the sealing of spheroid, makes the sealability of valve worse and worse, and causing spheroid to rotate, spheroid is stuck the most at last.
The present invention adopts the design of single valve seat two-way sealing valve seat construction, and based on said structure design, whole ball valve only has a valve seat, and spheroid adopts not eccentric scheme, and valve downstream is without valve seat construction.So both solved carry medium lumen pile up cause spool locking problem, also solved camflex valve sealed precision poor, very easily leak problem.
As Fig. 3, sealing direction one: medium upstream pressure is during higher than medium downstream pressure, normally sealing, when medium upstream inlet end pressure is greater than lower exit end pressure, medium upstream inlet end pressure promotion valve seat and spheroid sphere tight seal.Sealing principle: when medium upstream pressure is greater than medium downstream pressure: upstream pressure medium F1+spring-compensating pretightening force-downstream media realizes the sealing of spheroid and valve seat to the deboost F2 of valve seat.
As Fig. 4, sealing direction two: medium downstream pressure is during higher than medium upstream pressure, oppositely sealing, when medium downstream pressure is greater than medium upstream pressure, medium downstream pressure promotion valve seat and spheroid sphere tight seal.Sealing principle: medium downstream pressure is greater than while going on a tour: pressure F1+spring-compensating pretightening force-downstream media that downstream media enters valve seat back realizes the sealing of spheroid and valve seat to the forward thrust F2 of valve seat.
Between valve seat the 3rd step body 83 and spheroid, be provided with cutting edge body 11, cutting edge body 11 grows in valve seat the 3rd step body 83 and contacts with spherome surface extruding.Prevent that the bonding processing mode of spherome surface from utilizing cutting edge body to carry out, spheroid adopts not eccentric design, and in sealing surface of seat, outside is all designed with cutting edge, and spheroid fits tightly with valve seat all the time in rotary course.If there is medium to be bonded on spherome surface, outer edge mouth will automated cleaning spheroid in spheroid rotary course in valve seat, guarantees all the time the sealability of valve seat and spheroid.Left body the 3rd step body 33 is 45 degree towards the one side angle of inclination of spheroid 5, and left body the 3rd step body 33 is extrusion ball dignity towards the one side of spheroid 5, and cutting edge body 11 grows in extrusion ball dignity.
In spheroid, be provided with through hole and form spheroid runner 51, the diameter of spheroid runner 51 equals left body 3 minimum diameters.
In order to guarantee the assembling of spring, between valve seat the 3rd step body 83 and left body the 3rd step body 33, there is gap.
In order to guarantee the assembling of seal ring, between valve seat second step body 82 and left body second step body 32, there is gap.
Parts machining concrete steps are: the thick fine finishing valve body of form, left body, valve seat, the spheroid that adopt machining; Require processing rear valve body and valve seat to be not less than Ra1.6 in the degree of finish of seal ring rigging position, the cooperation position degree of finish between valve seat and spheroid is not less than Ra0.8; All the other position degree of finish of each part are not less than Ra3.2.
Component assembling concrete steps are.1, part parts to be assembled after machining are repaiied to burr, all metal partss are cleaned up, dry up with pressurized air, guarantee surperficial noresidue.
2, spring is put into left body inside.
3, seal ring is put into valve seat cylindrical sealed department.
4, the valve seat assembling is put into left body inside, noted protecting seal ring.
5, pack spheroid into valve inner, pack successively lower stem seal portion part and upper valve rod portion part into, and pack gasket seal in valve body connecting part.
6, by the left body part assembling and the combination of valve body part.
7, according to the Assembly process specification of ordinary ball valve, assemble all the other component.
As mentioned above, can well realize the utility model.
Claims (7)
1. single valve seat two-way sealing structure ball valve, it is characterized in that: comprise valve body (2) and left body (3), valve body (2) and left body (3) are oppositely arranged rear formation lumen (7), in lumen (7), be provided with spheroid (5), spheroid is connected with upper stem seal portion (1), upper stem seal portion (1) is from spheroid (5) extends to lumen (7), wherein between left body (3) and spheroid, be provided with valve base sealing portion (4), valve base sealing portion (4) comprise valve seat (8) and be positioned at valve seat and left body (3) between seal ring (10) and be positioned at valve seat and left body (3) between spring (9), at medium upstream, point in the direction in medium downstream, described left body (3) comprises left body first step body (31), left body second step body (32), left body the 3rd step body (33), left body the 4th step body (34) of integrated connection successively, and described valve seat (8) comprises valve seat first step body (81), valve seat second step body (82), valve seat the 3rd step body (83) of integrated connection successively, the internal diameter that the internal diameter that the internal diameter of left body first step body (31) is less than left body second step body (32) is less than left body the 3rd step body (33) is less than the internal diameter of left body the 4th step body (34), the external diameter that the external diameter of valve seat first step body (81) is less than valve seat second step body (82) is less than the external diameter of valve seat the 3rd step body (83), wherein, the internal diameter of left body second step body (32) equals the external diameter of valve seat first step body (81), the internal diameter of left body the 4th step body (34) equals the external diameter of valve seat the 3rd step body (83), seal ring (10) is positioned at left body second step body (32), left body the 3rd step body (33), valve seat first step body (81), in the cavity that valve seat second step body (82) forms, spring (9) is positioned between left body the 3rd step body (33) and valve seat the 3rd step body (83), and the axis of spring (9) is parallel with the direction that medium upstream points to medium downstream, one end of spring (9) and valve seat the 3rd step body (83) are abutted against towards medium upstream one side, the other end of spring (9) extends into left body the 3rd step body (33) inside.
2. single valve seat two-way sealing structure ball valve according to claim 1, it is characterized in that: between valve seat the 3rd step body (83) and spheroid, be provided with cutting edge body (11), cutting edge body (11) grows in valve seat the 3rd step body (83) and contacts with spherome surface extruding.
3. single valve seat two-way sealing structure ball valve according to claim 1, is characterized in that: in spheroid, be provided with through hole and form spheroid runner (51), the diameter of spheroid runner (51) equals left body (3) minimum diameter.
4. single valve seat two-way sealing structure ball valve according to claim 1, is characterized in that: between valve seat the 3rd step body (83) and left body the 3rd step body (33), have gap.
5. single valve seat two-way sealing structure ball valve according to claim 1, is characterized in that: between valve seat second step body (82) and left body second step body (32), have gap.
6. single valve seat two-way sealing structure ball valve according to claim 1, it is characterized in that: spheroid (5) is also provided with lower stem seal portion (6) away from upper stem seal portion (1) one side, lower stem seal portion (6) is positioned between valve body (2) and left body (3).
7. single valve seat two-way sealing structure ball valve according to claim 2, it is characterized in that: left body the 3rd step body (33) is 45 degree towards the one side angle of inclination of spheroid (5), left body the 3rd step body (33) is extrusion ball dignity towards the one side of spheroid (5), and cutting edge body (11) grows in extrusion ball dignity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320767439.8U CN203548978U (en) | 2013-11-29 | 2013-11-29 | Ball valve with single-valve-seat bidirectional sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320767439.8U CN203548978U (en) | 2013-11-29 | 2013-11-29 | Ball valve with single-valve-seat bidirectional sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203548978U true CN203548978U (en) | 2014-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320767439.8U Expired - Lifetime CN203548978U (en) | 2013-11-29 | 2013-11-29 | Ball valve with single-valve-seat bidirectional sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203548978U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105090590A (en) * | 2015-09-15 | 2015-11-25 | 上海电气阀门有限公司 | Top-mounted fixed ball valve free of valve seat avoiding |
-
2013
- 2013-11-29 CN CN201320767439.8U patent/CN203548978U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105090590A (en) * | 2015-09-15 | 2015-11-25 | 上海电气阀门有限公司 | Top-mounted fixed ball valve free of valve seat avoiding |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No. 3281, HANGGANG 4th Road, xihanggang, Shuangliu District, Chengdu, Sichuan 610200 Patentee after: Sichuan Suke Fluid Control Equipment Co.,Ltd. Address before: Building 1, Lidu Road, Shuangliu Park, Chengdu Jiaolong Industrial Port, Shuangliu County, Chengdu City, Sichuan Province, 610000 Patentee before: SICHUAN SUC FLOW CONTROL EQUIPMENT Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |