CN203239987U - Combined-type ball valve hard sealing structure - Google Patents
Combined-type ball valve hard sealing structure Download PDFInfo
- Publication number
- CN203239987U CN203239987U CN 201320252824 CN201320252824U CN203239987U CN 203239987 U CN203239987 U CN 203239987U CN 201320252824 CN201320252824 CN 201320252824 CN 201320252824 U CN201320252824 U CN 201320252824U CN 203239987 U CN203239987 U CN 203239987U
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- valve
- belleville spring
- annular groove
- hard sealing
- sealing structure
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Abstract
The utility model discloses a combined-type ball valve hard sealing structure which comprises a valve base. The front surface of the valve base is an arced face matched with a valve ball. The arced face is provided with an annular groove, wherein a belleville spring is arranged in the annular groove. The belleville spring is provided with a composite graphite sealing pad. The arced face of the valve base is provided with the annular groove, the belleville spring is arranged in the annular groove and is provided with the composite graphite sealing pad, so that the composite graphite sealing pad is tightly contacted with the valve ball under the action of the belleville spring. After being abraded, the composite graphite sealing pad on the lower portion of the hard sealing structure can be ejected out to be tightly contacted with the valve ball under the action of the belleville spring. When the composite graphite sealing pad is abraded to the degree that the belleville spring is completely spread, due to the fact that the arced face of the front surface of the valve body is consistent with the ball surface of the valve ball, a hard sealing function is achieved again. The hard sealing structure is simple in structure, good in anti-abrasion performance, good in sealing performance and capable of bearing high temperature and high pressure, and fully plays practical value to the largest extent under the condition of equal resources.
Description
Technical field
The utility model belongs to the ball valve sealing technical field, is specifically related to a kind of combined type ball valve hard sealing structure.
Background technique
Ball valve is widely used in petroleum refining, long-distance transport pipes, chemical industry, papermaking, pharmacy, water conservancy, electric power, municipal administration, the industries such as iron and steel, its main feature is effective throttling, the wire drawing phenomenon is minimized thereby reduce the soaking of valve and valve seat (punching) erosion, and simple in structure, good seal performance, fluid resistance is little, yet under the High Temperature High Pressure situation, adopt now hard sealing means more, a kind of Novel compound mechanical seal ring is disclosed in CN 201916490 U, comprise the primary seal alloy hoop, secondary sealed graphite ring, seal ring, metal pressure pad and butterfly spring, described primary seal alloy hoop is circular, its inner circle is provided with internal spline, and secondary sealed graphite ring is circular, which is provided with seal groove, external splines; Secondary sealed graphite ring is in external splines embeds the internal spline of primary seal alloy hoop, and the metal pressure pad is located at the end face of secondary sealed graphite ring boss, and butterfly spring is located at the end face of metal pressure pad, and seal ring is located between the seal groove and metal pressure pad of boss.The utility model is by changing the structure of friction pair, improved seal ring wear resistance, alleviated the damaged condition of impurity to friction pair, have advantages of simple in structure, easy for installation, good sealing effect, long working life.Yet it can not solve the sealing of ball valve, a kind of soft or hard dual-seal fixed ball valve is disclosed in CN 102278491 A, comprise valve body, valve seat and spherical valve core, valve seat is fixed between the runner mouth and spherical valve core of valve body, valve body, valve seat and spherical valve core are all metal material, valve seat has hard sealing surface, hard sealing surface be on the valve seat with contacted of spherical valve core, hard sealing surface shape is consistent with the arc surface of its corresponding spherical valve core, hard sealing surface contacts with spherical valve core and consists of elementary hard sealing, be fixed with the O shape circle of quality of rubber materials on the valve seat, the one O shape circle contacts with spherical valve core and consists of secondary soft seal, the soft or hard double-sealing combined sealing structure that adopts elementary hard sealing and secondary soft seal to combine, make the sealability of ball valve more reliable, substantially reach " zero leakage " seal request, the one O shape circle outer surface of quality of rubber materials has polytetrafluoroethylene floor, not only guarantee elasticity and the toughness of sealing surface, also reduced friction, improved wear resistance, the switching access times of ball valve are brought up to more than ten times.It is provided with rubber seal at hard seal valve seat, yet its seal ring sealing effect after wearing and tearing is not good, and bearing temperature is not high, so need a kind of can wear resistance good, good airproof performance, combined type ball valve hard sealing structure that bearing temperature is high.
The model utility content
The purpose of this utility model is to provide that a kind of wear resistance is good, good airproof performance, combined type ball valve hard sealing structure that bearing temperature is high.
Realize that the technological scheme that the purpose of this utility model adopts is: a kind of combined type ball valve hard sealing structure, comprise valve seat, described valve seat front surface is the cambered surface that cooperates with valve ball, on the described cambered surface annular groove is set, in the described annular groove belleville spring is set, the graphite composite gland bush is set on the described belleville spring.
Described annular groove is concentric circles to be arranged, and the quantity of described annular groove is two.
The quantity of described belleville spring is four.
The quantity of described graphite composite gland bush is two.
The utility model arranges annular groove in the arc-shaped surface of valve seat, belleville spring is set in annular groove, the graphite composite gland bush is set thereon, make the graphite composite gland bush under the effect of belleville spring with the valve ball close contact, and under effect that can be at belleville spring after the wearing and tearing, the graphite composite gland bush of below ejected make itself and valve ball close contact; Because the graphite composite gland bush is high temperature resistant, high pressure resistant, corrosion-resistant, greasy property is good, and makes its sealability better, more stable under the effect of two graphite composite gland bush, rotates lighter; And the cambered surface owing to the valve body front surface after the graphite composite gland bush wears up to belleville spring and unfolds fully is consistent with the valve ball sphere, so played again the effect of hard sealing; The utility model is simple in structure, wear resistance good, good airproof performance, can bear High Temperature High Pressure, is bringing into play to greatest extent its use value under equal resources supplIes.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described:
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1: a kind of combined type ball valve hard sealing structure, comprise valve seat 1, described valve seat 1 front surface is the cambered surface that cooperates with valve ball 3, and annular groove 2 is set on the described cambered surface, the described annular groove 2 interior belleville springs 5 that arrange arrange graphite composite gland bush 4 on the described belleville spring 5.
Described annular groove 2 is concentric circles to be arranged, and the quantity of described annular groove 2 is two.
The quantity of described belleville spring 5 is four.
The quantity of described graphite composite gland bush 4 is two.
The utility model arranges annular groove in the arc-shaped surface of valve seat, belleville spring is set in annular groove, the graphite composite gland bush is set thereon, make the graphite composite gland bush under the effect of belleville spring with the valve ball close contact, and under effect that can be at belleville spring after the wearing and tearing, the graphite composite gland bush of below ejected make itself and valve ball close contact; Because the graphite composite gland bush is high temperature resistant, high pressure resistant, corrosion-resistant, greasy property is good, and makes its sealability better, more stable under the effect of two graphite composite gland bush, rotates lighter; And the cambered surface owing to the valve body front surface after the graphite composite gland bush wears up to belleville spring and unfolds fully is consistent with the valve ball sphere, so played again the effect of hard sealing; The utility model is simple in structure, wear resistance good, good airproof performance, can bear High Temperature High Pressure, is bringing into play to greatest extent its use value under equal resources supplIes.
Claims (4)
1. combined type ball valve hard sealing structure, comprise valve seat, it is characterized in that: the cambered surface of described valve seat front surface for cooperating with valve ball arranges annular groove on the described cambered surface, in the described annular groove belleville spring is set, the graphite composite gland bush is set on the described belleville spring.
2. combined type ball valve hard sealing structure according to claim 1 is characterized in that: described annular groove is concentric circles to be arranged, and the quantity of described annular groove is two.
3. combined type ball valve hard sealing structure according to claim 1, it is characterized in that: the quantity of described belleville spring is four.
4. combined type ball valve hard sealing structure according to claim 1, it is characterized in that: the quantity of described graphite composite gland bush is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320252824 CN203239987U (en) | 2013-05-11 | 2013-05-11 | Combined-type ball valve hard sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320252824 CN203239987U (en) | 2013-05-11 | 2013-05-11 | Combined-type ball valve hard sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203239987U true CN203239987U (en) | 2013-10-16 |
Family
ID=49317285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320252824 Expired - Fee Related CN203239987U (en) | 2013-05-11 | 2013-05-11 | Combined-type ball valve hard sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203239987U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458469A (en) * | 2018-12-29 | 2019-03-12 | 苏州道森阀门有限公司 | A kind of carbon graphite sealing structure of ball seat |
-
2013
- 2013-05-11 CN CN 201320252824 patent/CN203239987U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458469A (en) * | 2018-12-29 | 2019-03-12 | 苏州道森阀门有限公司 | A kind of carbon graphite sealing structure of ball seat |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131016 Termination date: 20170511 |