CN2663752Y - Double seal structure of ball-fixed ball valve - Google Patents
Double seal structure of ball-fixed ball valve Download PDFInfo
- Publication number
- CN2663752Y CN2663752Y CN 200320108655 CN200320108655U CN2663752Y CN 2663752 Y CN2663752 Y CN 2663752Y CN 200320108655 CN200320108655 CN 200320108655 CN 200320108655 U CN200320108655 U CN 200320108655U CN 2663752 Y CN2663752 Y CN 2663752Y
- Authority
- CN
- China
- Prior art keywords
- valve
- valve seat
- ball
- floating
- double sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Taps Or Cocks (AREA)
- Check Valves (AREA)
Abstract
A double seal structure of ball-fixed ball valve is characterized by comprising a floating valve base and a rubber seal part fixed on the floating valve base by a valve base plunger ring; the floating valve base is provided with a step outer annulus surface corresponding to a step valve base hole of the valve body; a chamber is arranged between the floating valve base and a step valve base hole; the chamber is provided with an O-shaped obturating ring which can be moved axially. The utility model solves the problem that front and rear seals can seal together and the rear seal still can keep sealing when the front seal fails.
Description
Technical field:
The utility model is about sealing, particularly about the sealing configuration of ball valve.
Background technique:
Ball valve is because it is simple in structure, easily manufactured; Especially its operation light and fast does not have specific direction requirement during installation, can adapt to the characteristics of the antikinesis of fluid, is adopted by the piping design personnel day by day.Ball valve can be divided into floating ball and fixing spherical ball valve two big classes again by its structure.In fixing spherical ball valve, valve body is provided with upper and lower stationary axle, and valve ball is bearing on this upper and lower stationary axle with bearing fixing.Therefore, under fluid pressure action, this valve ball is fixed, and the seal ring that is arranged on these valve ball both sides floats, and the seal ring that promptly is positioned at upstream side is pushed to valve ball and produces the prime sealing under fluid pressure action.If the seal ring of upstream side is in use impaired, hydrodynamic pressure acts on the seal ring in downstream side by the valve pocket of valve body, and it is pushed away valve ball, destroys sealing, produces and leak.So fixedly spherical ball valve in use has only a seal ring reinstating, another seal ring just just seals when the FLUID TRANSPORTATION direction is opposite.As seen, in case fixedly the spherical ball valve upstream seal is damaged, must dismantle the ball valve place under repair, this certainly will influence production.How making fixedly spherical ball valve downstream side seal circle also can bring into play its seal action, is that the valve industry is wanted the technical problem that solves always to prolong the ball valve maintenance interval.
Summary of the invention:
The purpose of this utility model is to provide a kind of fixedly spherical ball valve double sealing structure, solves that former and later two sealings can seal simultaneously and when the prime seal failure, and final-stage seal still keeps the technical problem that seals.
The technological scheme that the utility model solves the problems of the technologies described above is as follows:
A kind of fixedly spherical ball valve double sealing structure is characterized in that: this double sealing structure comprises floating valve seat and is fixed on rubber seal on this floating valve seat with the valve seat trim ring; This floating valve seat has and the corresponding stepped shaft outer peripheral surface of valve body stepped shaft valve seat orifice, is formed with cavity between this floating valve seat and stepped shaft valve seat orifice, and being provided with in this cavity can axially movable O-ring seals.
Described fixedly spherical ball valve double sealing structure is characterized in that: this floating valve seat one end has the cambered surface of leaning on mutually with valve ball.
Described fixedly spherical ball valve double sealing structure is characterized in that: this valve seat trim ring outer peripheral surface is provided with the relief hole that communicates with the Sealing flute.
Described fixedly spherical ball valve double sealing structure is characterized in that: be provided with the circlip that valve seat trim ring and floating valve seat are locked together.
Described fixedly spherical ball valve double sealing structure, it is characterized in that: valve body is provided with the spring of this double sealing structure being pressed to valve ball.
Advantage of the present utility model is as follows:
1. in the work, forward and backward level sealing realizes simultaneously.
2. because the valve seat orifice on floating valve seat and the valve body is a kind of stair-stepping shrink-fit structure, be equipped with axially displaceable O-ring seals therebetween again, after the sealing (being the prime sealing) of upstream side was lost efficacy, the pressure of upstream side reaches in the valve ball valve pocket on every side, and infiltrate in the cavity that forms to the above-mentioned terrace structure of downstream side seal, with O-ring seals side direction passing downstream, block the path that this cavity leads to downstream line, cause pressure in this cavity to promote floating valve seat conversely and press to valve ball, realize the sealing (being final-stage seal) in downstream side, make ball valve still keep sealing not lose efficacy, both prolong the working life of ball valve, improved its reliability of operation and Security again.
3. the cambered surface of the floating valve seat one end of metal is leaned on mutually with valve ball, can prevent the wearing and tearing of solid particle to rubber seal effectively, has prolonged the working life of rubber seal.
4. the rubber seal of replaceable rapid wear keeps in repair.
5. relief hole can guarantee that the utility model under the condition of high-voltage operation, still keeps excellent sealing performance.
Description of drawings:
Fig. 1 is the utility model structural representation.
Fig. 2 is the local enlarged diagram of A among Fig. 1.
Fig. 3 is final-stage seal action principle figure.
Embodiment:
See also shown in Fig. 1,2, the utility model 2 is arranged on fixedly valve ball 12 both sides of spherical ball valve 1, and it comprises floating valve seat 21, valve seat trim ring 25, rubber seal 26.These floating valve seat 21 1 ends are provided with the cambered surface 211 leaned on mutually with valve ball 12 and the groove 212 of ccontaining rubber seal 26, form a cavity 3 between the step-like valve seat orifice 111 on its stepped shaft outer peripheral surface and the side valve body 11 that matches, being provided with in this cavity 3 can axially movable O-ring seals 22.Rubber seal 26 by the fluorine rubber manufacturing is fastened in the groove 212 of floating valve seat 21 by valve seat trim ring 25.Valve seat trim ring 25 mat circlips 24 are consolidated into one with floating valve seat 21.In addition, still can be provided with pin, in order to pin circlip 24.Also be provided with spring 23 on side valve body 11, these spring 23 1 ends are resisted against on the side valve body 11, and the other end is resisted against on the valve seat trim ring 25, and the utility model 2 is pressed to valve ball 12; This spring 23 also can be arranged on step-like valve seat orifice 111 bottoms, and these spring 23 two ends are resisted against respectively on side valve body 11 and the floating valve seat 21 like this, just the utility model 2 can be pressed to valve ball 12 equally.
In-line pressure reduction is less or do not have under the situation of pressure reduction, spring 23 is pressed to valve ball 12 with the utility model 2 from the fixing valve seat orifice 111 of two side valve bodies 11 of spherical ball valve 1, make the cambered surface 211 of floating valve seat 21 press valve ball 12, carry out metallic seal, prevent of the wearing and tearing of the solid particle of conveyance fluid effectively to rubber seal 26, rubber seal 26 simultaneously closely is pressed against valve ball 12 surfaces, seals.When the discharge pressure of pipeline middle and upper reaches increases, be in the cavity 3 of the utility model 2 of upstream side O-ring seals 22 by to valve ball 12 axis of orientations to passing, the leakage passage that this cavity 3 is led to valve pocket 13 stops up (referring to Fig. 2), 2 of the utility model of this upstream side are pressed to valve ball 12 surfaces under discharge pressure and spring 23 double actions, the sealing of implementation prime, be in the utility model 2 in downstream side, because valve pocket 13 is not obvious with the pressure difference in the downstream line, still realize final-stage seal by spring 23.When in case the sealing of the prime of upstream side was lost efficacy owing to the damage of rubber seal 26, high discharge pressure in the upstream line reaches in the valve pocket 13, and infiltrate to the cavity 3 between the stepped shaft valve seat orifice 111 of the floating valve seat 21 in downstream side and this side side valve body 11, and the position that the utility model 2 in this downstream side is in the valve pocket 13 suspends, the both sides, position that this suspends area that is stressed is almost equal, so suffered two opposite axial pressure balances, but the O-ring seals 22 in this cavity 3 is done move axially (referring to shown in Figure 3) away from valve ball 12 directions under this high pressure, blocked the path of this cavity 3 with the downstream side pipeline, cause the pressure in this cavity 3 that floating valve seat 21 is pressed to valve ball 12, thereby still kept the existence of final-stage seal.
For prevent under the high-pressure situations when valve ball 12 opens and closes, rubber seal 26 is deviate from from the groove 212 of floating valve seat 21 or is ground bad by valve ball 12, offers the relief hole radially 251 that leads to groove 212 at the circumferential surface of valve seat trim ring 25.
Claims (7)
1, a kind of fixedly spherical ball valve double sealing structure is characterized in that: this double sealing structure comprises floating valve seat and is fixed on rubber seal on this floating valve seat with the valve seat trim ring; This floating valve seat has and the corresponding stepped shaft outer peripheral surface of valve body stepped shaft valve seat orifice, is formed with cavity between this floating valve seat and stepped shaft valve seat orifice, and being provided with in this cavity can axially movable O-ring seals.
2, fixedly spherical ball valve double sealing structure according to claim 1 is characterized in that: this floating valve seat one end has the cambered surface of leaning on mutually with valve ball.
3, fixedly spherical ball valve double sealing structure according to claim 1 is characterized in that: this valve seat trim ring outer peripheral surface is provided with the relief hole that communicates with its inner ring Sealing flute.
4, fixedly spherical ball valve double sealing structure according to claim 2 is characterized in that: this valve seat trim ring outer peripheral surface is provided with the relief hole that communicates with its inner ring Sealing flute.
5, according to claim 1,2,3 or 4 described fixedly spherical ball valve double sealing structures, it is characterized in that: be provided with the circlip that valve seat trim ring and floating valve seat are locked together.
6, according to claim 1,2,3 or 4 described fixedly spherical ball valve double sealing structures, it is characterized in that: valve body is provided with the spring of this double sealing structure being pressed to valve ball.
7, fixedly spherical ball valve double sealing structure according to claim 5, it is characterized in that: valve body is provided with the spring of this double sealing structure being pressed to valve ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320108655 CN2663752Y (en) | 2003-12-05 | 2003-12-05 | Double seal structure of ball-fixed ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320108655 CN2663752Y (en) | 2003-12-05 | 2003-12-05 | Double seal structure of ball-fixed ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2663752Y true CN2663752Y (en) | 2004-12-15 |
Family
ID=34342790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320108655 Expired - Lifetime CN2663752Y (en) | 2003-12-05 | 2003-12-05 | Double seal structure of ball-fixed ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2663752Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338229A (en) * | 2010-07-16 | 2012-02-01 | 天特阀门集团有限责任公司 | Ball valve seat and manufacturing method thereof |
| CN105221785A (en) * | 2015-09-28 | 2016-01-06 | 伯特利阀门集团有限公司 | Novel self sealing fixing ball valve |
| CN108547963A (en) * | 2018-04-28 | 2018-09-18 | 上海华托阀门自动化有限公司 | A kind of primary and secondary sealing device for pipeline ball-valve |
-
2003
- 2003-12-05 CN CN 200320108655 patent/CN2663752Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338229A (en) * | 2010-07-16 | 2012-02-01 | 天特阀门集团有限责任公司 | Ball valve seat and manufacturing method thereof |
| CN102338229B (en) * | 2010-07-16 | 2014-12-03 | 天特阀门集团有限责任公司 | Ball valve seat and manufacturing method thereof |
| CN105221785A (en) * | 2015-09-28 | 2016-01-06 | 伯特利阀门集团有限公司 | Novel self sealing fixing ball valve |
| CN108547963A (en) * | 2018-04-28 | 2018-09-18 | 上海华托阀门自动化有限公司 | A kind of primary and secondary sealing device for pipeline ball-valve |
| CN108547963B (en) * | 2018-04-28 | 2024-03-19 | 上海华托阀门自动化有限公司 | Primary and secondary sealing device for pipeline ball valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5165595B2 (en) | Sealing device between two mutually moving components for sealing the high pressure side with respect to the low pressure side | |
| CN102927002B (en) | High-pressure gear pump | |
| US5201872A (en) | Gate valve improvement | |
| KR102180853B1 (en) | Radial shaft seal | |
| US20090108542A1 (en) | Seal Assembly for Relieving Pressure | |
| CN201050598Y (en) | Mechanical seal | |
| CN201184434Y (en) | Monomer axial flow type back valve with sealing ring arranged at front | |
| CN101614285B (en) | Ball valve | |
| CN2663752Y (en) | Double seal structure of ball-fixed ball valve | |
| CN101532523A (en) | Novel hydraulic cylinder | |
| CN211474940U (en) | Spherical bidirectional high-performance rotary valve | |
| CN102303827A (en) | Post-positioned disk brake for mine hoister | |
| CN211039005U (en) | Wear-resistant split plunger for high-pressure plunger pump | |
| CN201568596U (en) | Ball valve | |
| CN110067783B (en) | Engineering machinery hydraulic cylinder piston structure with secondary throttling buffer function | |
| CN1280562C (en) | Annular seal, especially for a ball valve | |
| CN115750361A (en) | Axial pressure balancing device | |
| CN213419544U (en) | Two-way hydraulic control one-way valve | |
| CN210687019U (en) | Two-way hard seal butterfly valve | |
| CN210715379U (en) | Integral type conical surface sealing pressure measuring joint | |
| CN211624528U (en) | Quick-release self-sealing valve | |
| CN110500355B (en) | Thrust washer | |
| CN202118024U (en) | Cylinder bottom oil-way shutoff valve | |
| CN218030564U (en) | Hydraulic pump | |
| CN100362268C (en) | Back pressure type high pressure shaft seal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20131205 Granted publication date: 20041215 |