CN204729667U - Lip seal structure ball valve - Google Patents
Lip seal structure ball valve Download PDFInfo
- Publication number
- CN204729667U CN204729667U CN201520464837.1U CN201520464837U CN204729667U CN 204729667 U CN204729667 U CN 204729667U CN 201520464837 U CN201520464837 U CN 201520464837U CN 204729667 U CN204729667 U CN 204729667U
- Authority
- CN
- China
- Prior art keywords
- valve
- valve body
- spheroid
- ball
- point
- 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 - Fee Related
Links
Landscapes
- Taps Or Cocks (AREA)
Abstract
The utility model provides a kind of lip seal structure ball valve, comprise valve body (1), the valve gap (2) on valve body (1) is connected to by nut, be arranged on the valve rod (7) that the spheroid (4) in valve body (1) is connected with spheroid (4) with one end, the other end of valve rod (7) stretches out valve body (1) and is connected with handle (5), sealing gasket (9) is provided with between valve body (1) and valve gap (2), filler (8) is crimped with by gland (6) between valve rod (7) and valve body (1), spheroid (4) and valve body (1) and between spheroid (4) and valve gap (2), be provided with deformable lip seal valve seat (3).The beneficial effects of the utility model: deformed by the lip of seal valve seat and ensure the sealability of valve, improve working life.
Description
Technical field
The device of a kind of main cut-out and throttling action on pipeline in pipe technology field involved by the utility model, particularly a kind of lip seal structure ball valve.
Background technique
In ball valve development, the requirement of valve high sealing and low operational torque are required that (open-close on-off is light) is two targets that product is pursued all the time, and these two targets are conflicts, opposition and the tradition of this contradiction, promote the development of ball valve further.Existing ball valve sealing valve seat construction is blocking type sealing configuration (as Fig. 2), and " blocking type " sealing is that the seal ring 3 that a ring-type is simply manufactured by PTFE material is contained between spheroid 4 and valve body 1.This structural design is difficult to control assemble magnitude of interference, and the ball valve of manufacture is not that magnitude of interference is too little and easily leak, and be exactly that magnitude of interference is too large and torque is large, product quality in applying working condition process is unstable.
Therefore, wish there is a kind of good sealing seat structure, can deform when pressed, and when replying its original shape after stress elimination.This phenomenon is also referred to as " memory characteristic " of material, and such as elastic cord can be elongated, and stress, once aobvious lose, just returns to original shape.PTFE material, its elastic range is little, and plastic range is large.When stress acquires a certain degree, just produce " cold flow " phenomenon, namely the change of form of macroscopic view.Be the thermal expansion of PTFE material in addition, its thermal expansion coefficient is 7.5 times of steel.Increase magnitude of interference owing to expanding, compressive stress increases, and exceedes the limit of " cold flow ", and material produces " cold flow " serious distortion.The magnitude of interference (pretension amount) of PTFE material disappears, and valve just easily causes leakage.Affect product working life.
Model utility content
For the defect of sealing seat structure in existing ball valve, the utility model provides a kind of lip seal structure ball valve.
To achieve these goals, technical solution adopted in the utility model is:
A kind of lip seal structure ball valve, comprise valve body, valve rod that the valve gap be connected to by nut on valve body, the spheroid be arranged in valve body are connected with spheroid with one end, the other end of valve rod stretches out valve body and is connected with handle, sealing gasket is provided with between valve body and valve gap, filler is crimped with by gland, spheroid and valve body and between spheroid and valve gap, be provided with deformable lip seal valve seat between valve rod and valve body;
Described seal valve seat is the bent limit polygon structure containing four point of contact, point of contact comprises the valve seal point contacted with valve body or valve gap, the ball seal point contacted with spheroid, the ball strong point contacted with spheroid, the valve strong point that contacts with valve body or valve gap, Qu Bianwei arc between ball seal point and the ball strong point, the bent limit between all the other adjacent contact points is L-type broken line;
The material of described seal valve seat is PTFE material.
The beneficial effects of the utility model: spheroid remains on valve pocket center, spheroid is small floating; After assembling, lip deforms, and energy storage elasticity energy of deformation, realizes the sealing of low pressure; The strong point on sealing seat, when pressure or temperature raise, balance portion acts on the medium power on sealing seat; Prevent material contingent " cold flow " dying property, thus ensure that the sealability of valve, improve product working life.
Accompanying drawing explanation
Fig. 1, overall structure schematic diagram of the present utility model;
The schematic diagram of sealing seat structure in Fig. 2, existing ball valve;
Seal valve seat structural representation in Fig. 3, the utility model before assembling;
Seal valve seat structural representation in Fig. 4, the utility model after assembling.
Embodiment
For overcoming the defect of sealing seat structure in existing ball valve, design a kind of lip seal structure ball valve (as Fig. 1, Fig. 3, Fig. 4), comprise valve body 1, valve rod 7 that the valve gap 2 be connected to by nut on valve body 1, the spheroid 4 be arranged in valve body 1 are connected with spheroid 4 with one end, the other end of valve rod 7 stretches out valve body 1 and is connected with handle 5, sealing gasket 9 is provided with between valve body 1 and valve gap 2, filler 8 is crimped with by gland 6, spheroid 4 and valve body 1 and between spheroid 4 and valve gap 2, be provided with deformable lip seal valve seat 3 between valve rod 7 and valve body 1; Described seal valve seat 3 is the bent limit polygon structure containing four point of contact, point of contact comprises the valve seal point 31 contacted with valve body 1 or valve gap 2, the ball seal point 32 contacted with spheroid 4, the ball strong point 33 contacted with spheroid 4, the valve strong point 34 that contacts with valve body 1 or valve gap 2, Qu Bianwei arc between ball seal point 32 and the ball strong point 33, the bent limit between all the other adjacent contact points is L-type broken line; The material of described seal valve seat 3 is PTFE material.
Lip seal valve seat construction overcomes " cold flow " of PTFE material and the defect of thermal expansion character, by the change in shape of antelabium before and after sealing seat assembling, stores the elastic deformation energy of material.When temperature or pressure increase, under the effect of medium power, absorb elastic deformation energy further, produce the flexural force of a reset condition; When temperature or pressure drop, medium power disappears, and release elastic deformation energy, returns to the original form, and obtains material " memory characteristic ", also referred to as flexible lip type seal valve seat.During fabrication, in order to prevent the amount of deformation of lip excessive, the permanent deformation of generation, so when lip seal seat design, has a strong point to limit the generation of its transition deformation.
The beneficial effects of the utility model: spheroid remains on valve pocket center, spheroid is small floating; After assembling, lip deforms, and energy storage elasticity energy of deformation, realizes the sealing of low pressure; The strong point on sealing seat, when pressure or temperature raise, balance portion acts on the medium power on sealing seat; Prevent material contingent " cold flow " dying property, thus ensure that the sealability of valve, improve product working life.
Those ordinary skill in the art simply replace and change is all within this patent protection domain.
Claims (3)
1. lip seal structure ball valve, comprise valve body (1), the valve gap (2) on valve body (1) is connected to by nut, be arranged on the valve rod (7) that the spheroid (4) in valve body (1) is connected with spheroid (4) with one end, the other end of valve rod (7) stretches out valve body (1) and is connected with handle (5), sealing gasket (9) is provided with between valve body (1) and valve gap (2), filler (8) is crimped with by gland (6) between valve rod (7) and valve body (1), it is characterized in that, spheroid (4) and valve body (1) and between spheroid (4) and valve gap (2), be provided with deformable lip seal valve seat (3).
2. lip seal structure ball valve according to claim 1, it is characterized in that, described seal valve seat (3) is the bent limit polygon structure containing four point of contact, point of contact comprises the valve seal point (31) contacted with valve body (1) or valve gap (2), the ball seal point (32) contacted with spheroid (4), the ball strong point (33) contacted with spheroid (4), the valve strong point (34) contacted with valve body (1) or valve gap (2), Qu Bianwei arc between ball seal point (32) and the ball strong point (33), bent limit between all the other adjacent contact points is L-type broken line.
3. lip seal structure ball valve according to claim 1 and 2, is characterized in that, the material of described seal valve seat (3) is PTFE material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520464837.1U CN204729667U (en) | 2015-06-29 | 2015-06-29 | Lip seal structure ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520464837.1U CN204729667U (en) | 2015-06-29 | 2015-06-29 | Lip seal structure ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204729667U true CN204729667U (en) | 2015-10-28 |
Family
ID=54388020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520464837.1U Expired - Fee Related CN204729667U (en) | 2015-06-29 | 2015-06-29 | Lip seal structure ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204729667U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286877A (en) * | 2016-09-08 | 2017-01-04 | 苏州纽威阀门股份有限公司 | A kind of from pressure release fire prevention floating ball valve |
-
2015
- 2015-06-29 CN CN201520464837.1U patent/CN204729667U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286877A (en) * | 2016-09-08 | 2017-01-04 | 苏州纽威阀门股份有限公司 | A kind of from pressure release fire prevention floating ball valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204729667U (en) | Lip seal structure ball valve | |
| CN202048234U (en) | High-temperature metal seal ball valve | |
| CN203517310U (en) | Sealing structure for high-pressure composite cylinder | |
| CN203286123U (en) | Valve rod sealing ring with metal spring | |
| CN202790658U (en) | Valve seat of fixed ball valve | |
| CN202469060U (en) | Sealing structure of ball valve | |
| CN202469061U (en) | Novel sealing structure of novel ball valve | |
| CN203051797U (en) | Self-adaption elastic valve seat varying with pressure | |
| CN202402681U (en) | High temperature and high pressure ball valve | |
| CN204852428U (en) | Titanium material ball valve sealed firmly | |
| CN210372100U (en) | Novel elastic sealing structure | |
| CN204213363U (en) | High pressure butterfly valve | |
| CN204493714U (en) | A kind of seal arrangement being applicable to high temperature, hyperbaric environment | |
| CN202674355U (en) | Flat gate valve | |
| CN206112214U (en) | Subassembly, water flow detection device and electric water valve prevent frostbite | |
| CN204226687U (en) | A kind of High Pressure Difference two-way hard seal butterfly valve | |
| CN204729628U (en) | A kind of cylindrical rubber Sealing carrying Seal cage | |
| CN204153214U (en) | Flange Ball Valves | |
| CN203940022U (en) | Low moment of torsion self-return ball valve | |
| CN217272059U (en) | Multi-thread sealing valve seat for ball valve | |
| CN103115164A (en) | Spring compensated type low temperature floating ball valve | |
| CN205064897U (en) | High temperature high leakproofness metal disk seat ball valve | |
| CN203363151U (en) | O-shaped seal ring used for waterway sealing | |
| CN204239805U (en) | A kind of high-temperature metal seal ball valve | |
| CN204942639U (en) | Sealing mechanism between dynamic pressure selfsealings valve body, Stuffing box |
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: 20151028 Termination date: 20190629 |