CN101718351B - Polyethylene all-plastic gas ball valve - Google Patents
Polyethylene all-plastic gas ball valve Download PDFInfo
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- CN101718351B CN101718351B CN2009101937129A CN200910193712A CN101718351B CN 101718351 B CN101718351 B CN 101718351B CN 2009101937129 A CN2009101937129 A CN 2009101937129A CN 200910193712 A CN200910193712 A CN 200910193712A CN 101718351 B CN101718351 B CN 101718351B
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- seal ring
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Abstract
The invention relates to a polyethylene all-plastic gas ball valve, which comprises a valve body, a valve ball, valve ball sealing rings, sealing ring support rings and stub tubes. The valve ball is arranged in the valve body; the valve ball sealing rings are supported by the sealing ring support rings and are arranged on both ends of the valve ball; two ends of the valve body are provided with the stub tubes; the polyethylene all-plastic gas ball valve also comprises a valve ball sealing ring fixed seat for positioning the valve ball sealing rings and the sealing ring support rings; the valve ball sealing ring fixed seat is arranged in the valve body; and the valve ball sealing ring fixed seat and the valve body are provided with a buckling position structure for limiting an axial position of the valve ball sealing ring fixed seat. The polyethylene all-plastic gas ball valve adopts the independent valve ball sealing ring fixed seat structure and uses the buckling position to fix the sealing ring fixed seat in the valve body, so that the problem that the axial dimension of each sealing ring is changed due to the welding process is avoided, and an axial distance between two sealing surfaces is guaranteed to ensure that a pretightening force of the sealing surfaces is consistent with a designed pretightening force.
Description
Technical field
The present invention relates to a kind of pipeline cut-off valve, particularly a kind of Ball valve of pipeline of all-plastic.
Background technique
Polyethylene (PE) is one of plastic raw material that is most widely used in the petrochemicals.Since the eighties in last century, the PE material is used to make the delivery of fuel gas pipeline in a large number.Have tangible performance and price advantage with the gas pipeline of PE made than the pipeline of other made, therefore be used widely at gas industry.Along with being extensive use of of the gas pipeline of PE material, as the needs of forming pipe-line system, the U.S. has taken the lead in development and production PE ball valve also is widely used in PE fuel gas pipeline system.There are the U.S., France, Germany, Japan, Korea S etc. in the country that produces at present the polyethylene ball valve 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.The PE all-plastic ball valve is not corroded, and is anti-aging, and the life-span can reach 50 years, and 25 years maximum life-spans of metal valve; The PE valve can be connected with the PE pipe hot melting, and joint intensity height does not leak; But and direct-burried, need not build valve well.Compare with metal ball-valve, the short construction period, the valve that are connected with pipe network are in light weight, but are easy to carrying and welding, welding quality direct observation, need not to do complicated non-destructive inspection etc.Developed country such as American-European Japan and Korea S generally uses in the world.
In the PE fuel gas ball valve, small-bore ball valve adopts thermofussion welding to be connected into integral body at present, and the heavy caliber valve adopts the welding of electric smelting technology.Sweat soldering technology is simple, and cost is low, and precision is also low relatively; Electric smelting welding complex process, the cost height, the melting welding time is longer relatively.On valve mechanism, because the fuel gas ball valve axial dimension is longer relatively, basic structure is that two adapters separate with valve body, and two valve ball seal rings and seal ring support ring are installed on the stub (tube) respectively.During assembling, earlier seal ring and support ring are contained on the seal ring installing ring of stub (tube), valve rod and valve ball are installed on the valve body, on hot-melting machine, heat then and the inner cylindrical surface at fusing valve body socket joint position and the external cylindrical surface of stub (tube), when two cylndrical surface are melted to certain thickness, stub (tube) is inserted valve body socket joint position to certain depth, and pressurize also cools off it gradually.To the heavy caliber ball valve, generally be to imbed heater element at the socket joint position, stub (tube) is inserted valve body and fixing, treat that the socket joint position is melted after, stop heating, finish fusion process.The PE fuel gas ball valve that also has a kind of end face melting welding structure, promptly stub (tube) and valve body adopt end face melting welding.
The shortcoming of said structure is that to the spigot and socket type ball valve, the socket joint degree of depth directly influences the axial spacing of two valve ball seal rings, influence the impacting force in advance of valve ball sealing surface, the socket joint degree of depth is big, and pretightening force is big, the moment of torsion of opening and closing valve is big, and is big to the wearing and tearing of sealing surface; The socket joint degree of depth is little, and the sealing surface pretightening force is little, leaks hidden danger in existing.To the ball valve of end face melting welding, because the melten gel amount that is pushed away on the face of weld is difficult to control, also just be difficult to control the axial spacing of two valve ball seal rings, the problem that the spigot and socket type ball valve occurs can take place equally.
Summary of the invention
The object of the present invention is to provide a kind of assurance seal ring axial spacing, make the pretightening force of sealing surface and the polyethylene all-plastic gas ball valve that the design pretightening force is consistent.
The present invention includes following technical characteristics: a kind of polyethylene all-plastic gas ball valve, comprise valve body, valve ball, valve ball seal ring, seal ring support ring, stub (tube), valve ball is located in the valve body, the valve ball seal ring supports and is located at the valve ball two ends by the seal ring support ring, the valve body two ends are provided with stub (tube), the present invention also comprises the valve ball seal ring fixed base that is used to locate valve ball seal ring and seal ring support ring, described valve ball seal ring fixed base is located in the valve body, and valve ball seal ring fixed base and valve body are provided with the button bit structure that is used to limit valve ball seal ring fixed base axial position.
Innovation part of the present invention is to have proposed free-standing valve ball seal ring fixed seat structure, this independently valve ball seal ring fixed base be fixed in the valve body by the button bit structure, thereby avoided the problem that causes the seal ring axial dimension to change because of fusion joining process, guarantee the axial spacing of two sealing surfaces, make the pretightening force of sealing surface and the structural type that the design pretightening force is consistent.
Further, described valve ball seal ring fixed base main body is a cylindrical body, and valve body is provided with valve ball seal ring fixed base place and is and the cylndrical surface concentric of valve ball seal ring fixed base and the inner cylindrical surface that matches; Described button bit structure is located on solid seal ring reservation external cylindrical surface of valve ball and the valve body inner cylindrical surface.The cylndrical surface of described valve ball seal ring fixed base and inner cylindrical surface interference fit, transition fit or the Spielpassung of valve body.
Be specially about button bit structure of the present invention: described button bit structure is concentric and inner groove that matches and protruding ring; Described inner groove is located on the valve ball seal ring fixed base external cylindrical surface, and protruding ring is located on the valve body inner cylindrical surface; Perhaps inner groove is located on the valve body inner cylindrical surface, and protruding ring is located on the valve ball seal ring fixed base external cylindrical surface.
Further, described inner groove is the annular groove of rectangle annular groove, right-angled triangle annular groove or rectangle and right-angled triangle combination; The annular groove of described right-angled triangle annular groove and rectangle and right-angled triangle combination has the annular groove face perpendicular with axis in the side away from the valve body center;
Described protruding ring is the projection of rectangular preiection, right-angled triangle projection or rectangle and the right-angled triangle combination that matches with inner groove, and the side of projection at close valve body center of described right-angled triangle projection and rectangle and right-angled triangle combination has the protruding end face with axis normal.
Establish valve ball seal ring installing ring and seal ring support ring installing ring in the described valve ball seal ring fixed base, valve ball seal ring installing ring and seal ring support ring installing ring are the inner groovy with valve ball seal ring fixed base; The face relative with seal ring support ring installing ring with valve ball seal ring installing ring is concentric with valve ball seal ring fixed base, is used for and the stub (tube) ring end face of welding mutually.
When valve ball seal ring fixed base and valve body by after the button bit structural orientation, the exterior edge face of valve ball seal ring fixed base and the exterior edge face of valve body are positioned at same plane, and formation and the stub (tube) end face of welding mutually.
The present invention is directed to present all-plastic sweat soldering ball valve, in fusion process, be difficult to guarantee the axial spacing of two seal rings, and and then influence the pretightening force of two sealing surfaces and the technological deficiency of valve opening and closing moment of torsion, a kind of structure that guarantees the seal ring axial spacing has been proposed.Owing to adopted button bit to limit the axial distance of seal ring, not in fusion process, but be the axial distance of two valve ball seal rings of may command in the process segment.
Description of drawings
Fig. 1 is PE ball valve overall structure figure of the present invention;
Fig. 2 is PE ball valve body structural drawing of the present invention (groove type, a rectangle annular groove);
Fig. 3 is the button bit structural drawing (groove type, the annular groove of rectangle and right-angled triangle combination) that is interlocked with the seal ring fixed base on the PE ball valve body of the present invention;
Fig. 4 is the button bit structural drawing (outer convex type, right-angled triangle projection) that is interlocked with the seal ring fixed base on the PE ball valve body of the present invention;
Fig. 5 is the structural drawing (groove type, the annular groove of rectangle and right-angled triangle combination) of PE ball valve sealing circle fixed base of the present invention;
Fig. 6 is the structural drawing (outer convex type) of PE ball valve sealing circle fixed base of the present invention;
Fig. 7 is the structural drawing of PE ball valve stub (tube) of the present invention.
Embodiment
The present invention is directed to present all-plastic sweat soldering ball valve in fusion process, be difficult to guarantee the axial spacing of two seal rings, and and then influence the pretightening force of two sealing surfaces and the technological deficiency of valve opening and closing moment of torsion, a kind of structure that guarantees the seal ring axial spacing has been proposed.
As shown in Figure 1, valve body 1, valve ball seal ring 2, seal ring support ring 3, valve ball seal ring fixed base 4, stub (tube) 5, valve rod 6, valve rod axial sealing ring 7, valve rod end-face seal ring 8, valve thimble 9, the valve ball 10 of comprising of the present invention.The axial spacing of two valve ball seal rings 2 is to rely on button bit 13 and the button bit on the valve ball seal ring fixed base 4 41 on the valve body to guarantee.
As Fig. 2 ~ shown in Figure 7, described valve body 1 is processed with the button bit 13 that matches with valve ball seal ring fixed base 4 being processed with valve ball seal ring installing ring 11 and seal ring support ring installing ring 12 near stub (tube) 5 one sides that are connected with pipeline at opposite side.The axial motion of described button bit 13 restriction valve ball seal ring fixed bases 4.Described valve body 1 also have two with the perpendicular exterior edge face 14,15 of valve axis, its exterior edge face 14 is positioned at and close on the valve body 1 valve ball seal ring installing ring 11 outsides is arranged, and is used for and stub (tube) 5 welding end face 51 weldings mutually; Its exterior edge face 15 is near button bit 13 1 sides, when the button bit 41 of valve ball seal ring fixed base 4 with after valve body button bit 13 cooperates, the exterior edge face 42 of valve ball seal ring fixed base 4 is positioned at same plane with the exterior edge face 15 of valve body 1, and formation and stub (tube) 5 welding end faces 51 end face 16 of welding mutually.It is an inner cylindrical surface 16 that cooperates with valve ball fixed base 4 cylndrical surface 42 that described valve body 1 is installed valve ball fixed base 4 places.
The body feature of described valve ball fixed base 4 is a cylindrical body, matches with the inner cylindrical surface 16 of valve body in its cylndrical surface 43, and this cooperation can be an interference fit, also can be transition fit or Spielpassung.Another feature of described valve ball fixed base 4 is that a protruding ring is arranged on cylndrical surface 43, i.e. axis and fixed base deads in line that button bit 41 should ring, be used for valve body 1 on button bit 13 be interlocked the axial position of assurance fixed base.Above-mentioned button bit 41 is the structures when the button bit on the valve body 1 13 is annular groove.Button bit 41 on the described valve ball fixed base 4 also can be the annular groove with fixed base 4 coaxial lines.This annular groove can be the rectangle annular groove, also can be the right-angled triangle annular groove, also can be the annular groove of rectangle and right-angled triangle combination.When being back two kinds of structures, the annular groove face perpendicular with valve ball fixed base 4 axis is positioned at away from the valve body center.When button bit 41 was annular groove, correspondingly the button bit on the valve body 1 13 was inside protruding ring.
Another feature of described seal ring fixed base 4 is, the valve ball seal ring 3 that processes and the installing ring 44,45 of seal ring support ring 4 are arranged on it.Valve ball seal ring installing ring 44 and seal ring support ring installing ring 45 are the inner groovy concentric with fixed base 4.
Another feature of described seal ring fixed base 4 is the face relative with valve ball seal ring installing ring 44 and seal ring support ring installing ring 45 for the ring end face 42 concentric with fixed base 4, is used for and stub (tube) 5 welding end face 51 weldings mutually.
Assembly process of the present invention is: at first with valve rod axial sealing ring 7, end-face seal ring 8, valve rod 6 valve body of from the inner cylindrical surface 16 of installation seal ring fixed base 4 one sides of valve body 1, packing into, pack in the inner cylindrical surface 16 with a valve ball seal ring 2 and valve ball seal ring support ring 3 also valve body 1 in the seal ring installing ring and seal ring bracing ring installing ring on the valve body, the seal ring fixed base 4 that a valve ball seal ring 2 and a valve ball seal ring support ring 3 will be installed then is pressed in the valve body inner cylindrical surface 16, and the button bit 13 on the valve body 1 is interlocked with button bit 41 on the seal ring fixed base 4.Next with hot melting process two stub (tube)s are welded on the valve body, load onto valve thimble then, finish the valve assembling.
Adopting button bit to limit the axial distance of seal ring, is not in fusion process, but is the axial distance of two valve ball seal rings of may command in the process segment.As the main mode that the component of PE material connect, fusion joining process can guarantee the tightness of join strength and connection part well, but cannot say for sure to demonstrate,prove the axial error of two links.Structure of the present invention can address this problem well.
Claims (3)
1. a polyethylene all-plastic gas ball valve comprises valve body (1), valve ball (10), valve ball seal ring (2), seal ring support ring (3) and stub (tube) (5); Valve ball (10) is located in the valve body (1), valve ball seal ring (2) supports and is located at valve ball (10) two ends by seal ring support ring (3), valve body (1) two ends are provided with stub (tube) (5), it is characterized in that: also comprise the valve ball seal ring fixed base (4) that is used to locate valve ball seal ring (2) and seal ring support ring (3), described valve ball seal ring fixed base (4) is located in the valve body (1), and valve ball seal ring fixed base (4) is provided with the button bit structure that is used to limit valve ball seal ring fixed base (4) axial position with valve body (1);
Described valve ball seal ring fixed base (4) main body is a cylindrical body, and valve body (1) is provided with and external cylindrical surface (43) concentric of valve ball seal ring fixed base (4) and the inner cylindrical surface (16) that matches; Described button bit structure is located on the inner cylindrical surface (16) of the external cylindrical surface (43) of valve ball seal ring fixed base (4) and valve body (1);
Described button bit structure is concentric and inner groove that matches and protruding ring; Described inner groove is located on valve ball seal ring fixed base (4) external cylindrical surface, and protruding ring is located on valve body (1) inner cylindrical surface; Perhaps inner groove is located on valve body (1) inner cylindrical surface, and protruding ring is located on valve ball seal ring fixed base (4) external cylindrical surface;
Described inner groove is the annular groove of rectangle annular groove, right-angled triangle annular groove or rectangle and right-angled triangle combination; The annular groove of described right-angled triangle annular groove and rectangle and right-angled triangle combination has the annular groove face perpendicular with axis in the side away from the valve body center;
Described protruding ring is the projection of rectangular preiection, right-angled triangle projection or rectangle and the right-angled triangle combination that matches with inner groove, and the side of projection at close valve body center of described right-angled triangle projection and rectangle and right-angled triangle combination has the protruding end face with axis normal;
Establish valve ball seal ring installing ring (44) and seal ring support ring installing ring (45) in the described valve ball seal ring fixed base (4), valve ball seal ring installing ring (44) is and the coaxial inner groovy of valve ball seal ring fixed base (4) with seal ring support ring installing ring (45); The face relative with seal ring support ring installing ring (45) with valve ball seal ring installing ring (44) is for being used for and stub (tube) (5) phase welding and the ring end face (42) concentric with valve ball seal ring fixed base (4).
2. polyethylene all-plastic gas ball valve according to claim 1 is characterized in that: the cylndrical surface (43) of described valve ball seal ring fixed base (4) is interference fit, transition fit or Spielpassung with the inner cylindrical surface (16) of valve body.
3. according to the polyethylene all-plastic gas ball valve described in claim 1 or 2, it is characterized in that: after valve ball seal ring fixed base (4) and valve body (1) pass through the button bit structural orientation, the exterior edge face (42) of valve ball seal ring fixed base (4) and the exterior edge face (15) of valve body (1) are positioned at same plane, and formation and stub (tube) (5) end face of welding (16) mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101937129A CN101718351B (en) | 2009-11-06 | 2009-11-06 | Polyethylene all-plastic gas ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101937129A CN101718351B (en) | 2009-11-06 | 2009-11-06 | Polyethylene all-plastic gas ball valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101718351A CN101718351A (en) | 2010-06-02 |
| CN101718351B true CN101718351B (en) | 2011-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101937129A Expired - Fee Related CN101718351B (en) | 2009-11-06 | 2009-11-06 | Polyethylene all-plastic gas ball valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN101718351B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154260A (en) * | 2014-07-04 | 2014-11-19 | 广东联塑科技实业有限公司 | Polyethylene ball valve |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128294A (en) * | 2010-10-29 | 2011-07-20 | 广东联塑科技实业有限公司 | PE (Poly Ethylene) ball valve and manufacturing method thereof |
| CN103363143A (en) * | 2013-06-28 | 2013-10-23 | 联塑科技发展(贵阳)有限公司 | Valve element stationary type PE fuel gas plug valve |
| CN112762191A (en) * | 2021-01-22 | 2021-05-07 | 广东联塑科技实业有限公司 | PE gas ball valve |
| CN114645954B (en) * | 2022-04-15 | 2022-11-11 | 天津三御流体控制科技有限公司 | Non-metal fixed ball valve |
-
2009
- 2009-11-06 CN CN2009101937129A patent/CN101718351B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154260A (en) * | 2014-07-04 | 2014-11-19 | 广东联塑科技实业有限公司 | Polyethylene ball valve |
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| Publication number | Publication date |
|---|---|
| CN101718351A (en) | 2010-06-02 |
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