CN2644803Y - Polyethylene ball valve used for fuel gas - Google Patents
Polyethylene ball valve used for fuel gas Download PDFInfo
- Publication number
- CN2644803Y CN2644803Y CN 03210660 CN03210660U CN2644803Y CN 2644803 Y CN2644803 Y CN 2644803Y CN 03210660 CN03210660 CN 03210660 CN 03210660 U CN03210660 U CN 03210660U CN 2644803 Y CN2644803 Y CN 2644803Y
- Authority
- CN
- China
- Prior art keywords
- ball
- valve body
- valve
- ball valve
- socket
- 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
Abstract
The utility model relates to a polyethylene ball valve in the medium and low pressure gas pipe network to control the gas conveying capacity. The main body of the prior product is butt jointed with hot melting so that the sealing performance is very poor and the defective index is high. The utility model comprises a valve body, a ball core positioned in the valve body, a stem matching the ball core, an end pipe and an adaptor which are connected with the valve body; the utility model is characterized in that a socket electrically molten and plugged on the inner wall of the valve body is arranged on the head of the end pipe. The socket is provided with a limiting bench used for socket joint. The main components (valve body and end pipe) of the utility model are electrically molten and socket jointed so that the interconnecting piece is firm, the bearing capacity is strong and the ball valve is provided with high safety. The limiting bench is used for limiting in the socket joint so that the depth of engagement is quite accurate and the product acceptability is high so as to realize the through diameter of the ball valve and bring the ventilation capacity of the ball valve to be obviously improved.
Description
[technical field]
The valve of control combustion gas quantity delivered during the utility model relates to, in the low-pressure fuel gas pipe network, the polyethylene ball valve that specifically a kind of combustion gas is used.
[background technique]
There are the U.S., France, Germany, Japan, Korea S etc. in the country that produces polyethylene (PE) ball valve at present in the world.The mid-90 along with the PE gas pipeline the applying of China, people recognize the superiority of PE ball valve aspect P/C gradually, and bring into use the PE ball valve to replace metal ball-valve gradually.Chinese patent ZL 00258196.5 discloses a kind of fuel gas polyethylene pipeline directly buried type ball valve, the main body of this ball valve (valve body and reducer union) is connected to hot melt and docks, there is following defective in it: 1) reducer union need be cut milling flat with valve body when hot melt docks, this cuts the difficult control of the amount of milling, be difficult to guarantee that the gap between valve body and end pipe is a definite value, can cause the relatively poor even gas leakage of sealing of product, the reject rate height; 2) concentricity that cannot say for sure to demonstrate,prove reducer union and valve body makes ball valve local wall thickness inequality on an axis, and the influence that is stressed is big, influences the working life of ball valve; 3) cross section of the seal ring of main body employing is " D " shape, and less relatively, thin, the area that contacts with the ball core is little, and the adjustable compression surplus is little, is subjected to the influence of temperature and manual operation factor big, and sealability is relatively poor.
In addition, the PE ball valve is basic on latus rectum to be semi-latus rectum (radius that is spool is half of reducer union), and this can have influence on the ventilation capacity of whole pipeline, causes the localized stress of pipeline relatively large, more easily cause in long-term using process and break, Security is lower.
[model utility content]
The technical assignment of technical problem to be solved in the utility model and proposition is to overcome above-mentioned prior art defective, the combustion gas polyethylene ball valve that provides a kind of main body to connect with the electric smelting socket joint, good seal performance, the up-to-standard rate height of product, the connection part of main body is abundant, and is safe.
The technical solution of the utility model is such: combustion gas polyethylene ball valve, comprise valve body, place valve body interior ball core, the stem stem that cooperates with the ball core, be connected end pipe and joint on the valve body, it is characterized in that described end tube head have one with the socket of valve interior wall electric smelting socket joint, this socket is provided with the limited step that socket joint connects usefulness.The electric smelting socket joint that is connected to of main body (valve body and end pipe) is connected, and intensity height, good airproof performance have been avoided issuable leakage between the metal valve mechanical connection.Carry out in being connected spacingly at the valve body and the socket joint of end pipe with limited step, make socket joint depth accuracy height, can guarantee the ball core and hold the gap between pipe is definite value (seal ring with unified specification is sealed, and has guaranteed sealability), the up-to-standard rate height of product.The connection part of main body abundant (existing relatively hot melt butt joint), it is strong to bear pressure capability, the Security that has improved ball valve.
Described combustion gas polyethylene ball valve has the ball seat seal ring between ball core and end pipe, and its section is
Shape, an end of ball seat seal ring cooperates with ball outer core face, and the other end is fixed on the end inner tube wall, in the ball seat seal ring trim ring is arranged.Trim ring is used for fixing the ball seat seal ring, makes ball seat seal ring unlikely coming off in the rotation process of ball valve.The ball seat seal ring is close to the ball core in the using process of ball valve, guarantee under the situation that ball valve is closed air tight.Ball seat seal ring of the present utility model and ball core area of contact are big, make the good airproof performance of main body.
Described combustion gas polyethylene ball valve, the step surface of stem stem and the bottom surface of valve body are provided with first road " O " shape seal ring.In present ball valve product, there is not seal ring between the step surface of stem stem and the inwall of valve body.The utility model is set up seal ring herein, has improved the step surface of stem stem and the sealability between valve body.
Described combustion gas polyethylene ball valve is provided with second and third and four roads " O " shape seal ring between the side of stem stem and side of valve body, be provided with the 5th road " O " shape seal ring between the inwall of joint and the outer wall of valve body.Five road seal rings make the better tightness between transmission part (stem stem) and valve body.
Described combustion gas polyethylene ball valve, the internal diameter of end pipe is suitable with the internal diameter of ball core, has realized the all-pass footpath of ball valve, and ball valve is significantly improved on ventilation capacity, and the defective of having avoided semi-latus rectum may exist stress to concentrate, makes product safer.
The beneficial effects of the utility model: 1) valve body is connected with the electric smelting socket joint between pipe with end, and connection part is abundant, and it is strong to bear pressure capability, ball valve safe; 2) carry out spacingly during socket joint connects with limited step, make to guarantee that the ball core is a definite value with holding the gap between pipe, the up-to-standard rate height of product by socket joint depth accuracy height; 3) ball seat seal ring and ball core area of contact are big, the good airproof performance of main body connection part; 4) five road seal rings make the better tightness between stem stem and valve body; 5) realized the all-pass footpath of ball valve, ball valve is significantly improved on ventilation capacity.
[description of drawings]
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the schematic representation of ball seat seal ring.
[embodiment]
As shown in the figure, combustion gas polyethylene ball valve, comprise valve body 1, place valve body interior ball core 2, the stem stem 3 that cooperates with ball core 2, be connected end pipe 4 and joint 5 on the valve body, the head of end pipe 4 have one with the socket 6 of valve body 1 inwall electric smelting socket joint, this socket 6 is provided with the limited step 7 that socket joint connects usefulness.Ball core 2 and 4 of end pipes have ball seat seal ring 8, and its section is
Shape, an end of ball seat seal ring 8 cooperates with ball core 2 outer wall, and the other end is fixed on end pipe 4 inwalls, and trim ring 9 is arranged in the ball seat seal ring 8.The inwall of the step surface of stem stem 3 and valve body 1 is provided with first road " O " shape seal ring 10.Be provided with second and third and four roads " O " shape seal ring 11,12,13 between the inwall of the outer wall of stem stem 3 and valve body 1, be provided with the 5th road " O " shape seal ring 14 between the outer wall of the inwall of joint 5 and valve body 1.The internal diameter of end pipe 4 equates with the internal diameter of ball core 2.
The production procedure of the utility model polyethylene ball valve is as follows: after 1) connecting up with resistance wire in valve body, with second and third, four and five road " O " shape seal rings put into the seal groove of corresponding valve body, obtain assembly 1; 2) first road " O " shape seal ring is put into seal groove on the stem stem step surface, will be put into stem stem, the ball core of seal ring again and put into assembly 1 successively, again joint is compressed into the valve body top and obtained assembly 2; 3) with trim ring the ball seat seal ring is pressed onto the position, at this moment, trim ring must be depressed into the end, not so deviates from easily, obtains assembly 3 like this; 4) repeating step 3 obtains second assembly 3; 5) assembly 2 is threaded to unlatching, in two assemblies, 3 plug-in packages 2.To the resistance wire energising of exposing, after waiting to reach the stipulated time, after cooling reaches the stipulated time, product is taken out from press.After the resistance wire that exposes disposed, can obtain assembling the product of finishing.
Claims (5)
1, combustion gas polyethylene ball valve, comprise valve body (1), place valve body interior ball core (2), the stem stem (3) that cooperates with the ball core, be connected end pipe (4) and joint (5) on the valve body, it is characterized in that described end pipe (4) head have one with the socket (6) of valve body (1) inwall electric smelting socket joint, this socket (6) is provided with the limited step (7) that socket joint connects usefulness.
2, combustion gas according to claim 1 polyethylene ball valve, it is characterized in that between described ball core (2) and end pipe (4) ball seat seal ring (8) being arranged, its section is " " shape, one end of ball seat seal ring (8) cooperates with ball core (2) outer wall, the other end is fixed on end pipe (4) inwall, and trim ring (9) is arranged in the ball seat seal ring (8).
3, combustion gas according to claim 1 and 2 polyethylene ball valve is characterized in that the step surface of described stem stem (3) and the inwall of valve body (1) are provided with first road " O " shape seal ring (1 0).
4, combustion gas according to claim 3 polyethylene ball valve, it is characterized in that being provided with between the inwall of the outer wall of described stem stem (3) and valve body (1) second and third and four roads " O " shape seal rings (11,12,13), be provided with the 5th road " O " shape seal ring (14) between the outer wall of the inwall of joint (5) and valve body (1).
5, combustion gas according to claim 1 polyethylene ball valve is characterized in that the internal diameter of the internal diameter of described end pipe (4) and ball core (2) is suitable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03210660 CN2644803Y (en) | 2003-09-12 | 2003-09-12 | Polyethylene ball valve used for fuel gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03210660 CN2644803Y (en) | 2003-09-12 | 2003-09-12 | Polyethylene ball valve used for fuel gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2644803Y true CN2644803Y (en) | 2004-09-29 |
Family
ID=34289455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03210660 Expired - Fee Related CN2644803Y (en) | 2003-09-12 | 2003-09-12 | Polyethylene ball valve used for fuel gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2644803Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010148583A1 (en) * | 2009-06-23 | 2010-12-29 | 广东联塑科技实业有限公司 | Top entry plastic ball valve |
| WO2010148585A1 (en) * | 2009-06-23 | 2010-12-29 | 广东联塑科技实业有限公司 | Bottom entry plastic ball valve |
| CN102147021A (en) * | 2010-06-01 | 2011-08-10 | 广东联塑科技实业有限公司 | PE (Poly Ethylene) gas ball valve structure |
| CN102345745A (en) * | 2011-07-26 | 2012-02-08 | 广东联塑科技实业有限公司 | Method for manufacturing fuel gas ball valve with steel and plastic composite structure |
-
2003
- 2003-09-12 CN CN 03210660 patent/CN2644803Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010148583A1 (en) * | 2009-06-23 | 2010-12-29 | 广东联塑科技实业有限公司 | Top entry plastic ball valve |
| WO2010148585A1 (en) * | 2009-06-23 | 2010-12-29 | 广东联塑科技实业有限公司 | Bottom entry plastic ball valve |
| US8783657B2 (en) | 2009-06-23 | 2014-07-22 | Guangdong Liansu Technology Industrial Co., Ltd. | Top entry plastic ball valve |
| US8807530B2 (en) | 2009-06-23 | 2014-08-19 | Guangdon Liansu Technology Industrial Co., Ltd. | Bottom entry plastic ball valve |
| CN102147021A (en) * | 2010-06-01 | 2011-08-10 | 广东联塑科技实业有限公司 | PE (Poly Ethylene) gas ball valve structure |
| CN102147021B (en) * | 2010-06-01 | 2013-06-12 | 广东联塑科技实业有限公司 | PE (Poly Ethylene) gas ball valve structure |
| CN102345745A (en) * | 2011-07-26 | 2012-02-08 | 广东联塑科技实业有限公司 | Method for manufacturing fuel gas ball valve with steel and plastic composite structure |
| CN102345745B (en) * | 2011-07-26 | 2013-06-12 | 广东联塑科技实业有限公司 | Method for manufacturing fuel gas ball valve with steel and plastic composite structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040929 |