CN201434104Y - Plastic ball valve structure - Google Patents
Plastic ball valve structure Download PDFInfo
- Publication number
- CN201434104Y CN201434104Y CN2009200589966U CN200920058996U CN201434104Y CN 201434104 Y CN201434104 Y CN 201434104Y CN 2009200589966 U CN2009200589966 U CN 2009200589966U CN 200920058996 U CN200920058996 U CN 200920058996U CN 201434104 Y CN201434104 Y CN 201434104Y
- Authority
- CN
- China
- Prior art keywords
- valve
- ball
- seal ring
- stub
- valve body
- 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
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Abstract
The utility model relates to the field of pipeline cut-off valves, in particular to a plastic ball valve structure which comprises a valve stem, a valve body, a valve ball, stubtubes, a first valve ball seal ring and a second valve ball seal ring; the valve ball is arranged in the valve body, and provided with the valve stem for rotating the valve ball; the first valve ball seal ring and the second valve ball seal ring are respectively symmetrically arranged on both ends of the valve ball in the valve body through seal ring supporting rings; and both sides of the valve body are connected withthe stubtubes by hot melt insertion. The insertion depth of the valve body and the stubtubes has no impact on the axial spacing of two seal surfaces, and the processing and positioning structures of the seal rings are arranged in the same part of the valve body, so that the error of the axial distance of the positioning surfaces is small.
Description
Technical field
The utility model relates to the pipeline cut-off valve field, and particularly a kind of valve body two ends socket joint hot melt connects the ball-valve structure of taking over.
Background technique
Polyethylene (PE) all-plastic ball valve is not corroded, and anti-aging, 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.
On the valve mechanism of existing ball valve made of plastic sweat soldering, generally adopt the one-piece side assembling structure at present, promptly spheroid, valve rod, a side sealing circle are packed into from valve body one end, and the diameter of this end is more than or equal to the diameter of valve ball chamber; Another seal ring is contained on the stub (tube), and valve body and stub (tube) rely on pack into the larger-diameter inner cylindrical surface of spheroid one side and the external cylindrical surface hot melt or the electric fusion welding of stub (tube) of valve body to be connected into integral ball valve.Valve rod relies on button bit and the valve thimble snapping on it, and valve thimble is by button bit and valve body snapping.Two seal rings are separately fixed on valve body and the stub (tube).During assembling, earlier with valve thimble by button bit and valve body snapping, again with a seal ring and support ring thereof by pack into seal ring and support annular groove of the bigger end of valve diameter, then from the bigger end of the valve diameter valve rod of packing into, make the button bit mouth on the valve rod go in the button bit of valve thimble the valve ball of packing into then again; Seal ring is installed on valve seals installing ring and the stub (tube) seal ring, next on hot-melting machine, heat 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.The deficiencies in the prior art are: the socket joint degree of depth of (1) valve body and stub (tube) directly influences the axial spacing of two sealing surfaces, influences impacting force in advance.The socket joint degree of depth is big, and pretightening force is big, and 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.And be difficult to guarantee the central lines of valve body and stub (tube) in the socket joint process, regular phenomenon is that these two center lines do not overlap, and angled, make the impacting force of seal ring and spheroid inhomogeneous on whole sealing strip.(2) from making angle, because two seal rings lay respectively on valve body and the stub (tube), the technology locating face of processing seal ring installing ring lays respectively on these two parts, therefore, just there is certain error in axial distance after the assembling of two seal ring installing rings because make locating face.
The model utility content
The purpose of this utility model is to overcome the deficiencies in the prior art, designs a kind of socket joint degree of depth of valve body and stub (tube) that makes and can not have influence on the axial spacing of sealing surface, thereby have no way of influencing the ball valve made of plastic structure of impacting force in advance.
In order to realize above-mentioned technical purpose, the utility model comprises following technical characteristics: a kind of ball valve made of plastic structure comprises valve rod, valve body, valve ball, stub (tube) and the first valve ball seal ring, the second valve ball seal ring; Described valve body both sides are respectively equipped with the welding end, and this welding end is connected with stub (tube) by thermofusible spigot, and the described first valve ball seal ring and the second valve ball seal ring then are symmetrically set in valve ball two ends in the valve body by the seal ring support ring respectively.
Described stub (tube) be provided with to the seal ring support ring carry out axial limiting bracing ring axially locating end face, with valve body fit into conduct to spacing radially spacing cylndrical surface, with the melting welding end face of valve body sweat soldering.Described melting welding end face be perpendicular to the planar annular of stub (tube) axis or with the round platform outer surface of stub (tube) dead in line.The stub (tube) outer surface is provided with glue groove, and glue groove is a circular groove of being located at the stub (tube) outer surface.Described glue groove cross section is square or circumferential notch.
Compared with prior art, the utility model is owing to be symmetrically set in valve ball two ends in the valve body by the seal ring support ring respectively with the first valve ball seal ring and the second valve ball seal ring; Valve body both sides thermofusible spigot respectively are connected with stub (tube).Therefore the socket joint degree of depth of valve body and stub (tube) does not influence the axial spacing of two sealing surfaces, and the processing position structure of seal ring all is positioned at these same parts of valve body, so the error of locating face axial distance is less.
Description of drawings
Fig. 1 is an assembling schematic representation of the present utility model;
Fig. 2 is a joint pipe structure schematic representation of the present utility model.
Embodiment
As shown in Figure 1, a kind of ball valve made of plastic structure comprises valve rod 2, valve body 4, valve ball 7, stub (tube) 8 and the first valve ball seal ring 11, the second valve ball seal ring 5; Valve ball 7 is located in the valve body 4, and valve ball 4 is provided with the valve rod 2 that rotates valve ball 7; The described first valve ball seal ring 11 and the second valve ball sealer 5 are symmetrically set in valve ball 7 two ends in the valve body 4 by seal ring support ring 6 respectively; Valve body 4 both sides thermofusible spigot respectively are connected with stub (tube) 8.
Fig. 2 is an adapter structural scheme of mechanism of the present utility model.Take over 8 on the whole for the cross section is circular solid of rotation, comprise pipe shaft 85, valve ball seal ring support ring 6 is carried out the bracing ring axially locating end face 83 of axial limiting, radially spacing cylndrical surface 82, melting welding end face 81, glue groove 84.Described bracing ring axially locating end face 83 contacts with the annular end face of valve ball seal ring support ring 6, and valve ball seal ring support ring 6 is carried out axial limiting.Described melting welding face 81 be perpendicular to the planar annular of pipe shaft 85 axis or with the round platform outer surface of pipe shaft 85 deads in line, be used for valve body 4 on the melten gel face by sweat soldering together.Described glue groove 84 is a circular groove, and its shape of cross section can be square, rectangular, circle or other shape breach, is used for holding melt plastics unnecessary in the thermofusible spigot process.
Because the first valve ball seal ring and the second valve ball seal ring are symmetrically set in valve ball two ends in the valve body by the seal ring support ring respectively; Valve body both sides thermofusible spigot respectively are connected with stub (tube).Therefore the socket joint degree of depth of valve body and stub (tube) does not influence the axial spacing of two sealing surfaces, and the processing position structure of seal ring all is positioned at these same parts of valve body, so the error of locating face axial distance is less.
Claims (5)
1, a kind of ball valve made of plastic structure comprises valve rod (2), valve body (4), valve ball (7), stub (tube) (8) and the first valve ball seal ring (11), the second valve ball seal ring (5); It is characterized in that: described valve body (4) both sides are respectively equipped with the welding end, and this welding end is connected with stub (tube) (8) by thermofusible spigot, and the described first valve ball seal ring (11) and the second valve ball seal ring (5) then are symmetrically set in interior valve ball (7) two ends of valve body (4) by the seal ring support ring respectively.
2, ball valve made of plastic structure according to claim 1, it is characterized in that described stub (tube) (8) be provided with to the seal ring support ring carry out axial limiting bracing ring axially locating end face (83), with valve body (4) fit into conduct to spacing radially spacing cylndrical surface (82), with the melting welding end face (81) of valve body (4) sweat soldering.
3, ball valve made of plastic structure according to claim 2, it is characterized in that described melting welding end face (81) for perpendicular to the planar annular of stub (tube) axis or with the round platform outer surface of stub (tube) dead in line.
4, ball valve made of plastic structure according to claim 3 is characterized in that stub (tube) (8) outer surface is provided with glue groove (84), and glue groove (84) is for being located at the circular groove of stub (tube) (8) outer surface.
5, ball valve made of plastic structure according to claim 4 is characterized in that described glue groove (84) cross section is square or circumferential notch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200589966U CN201434104Y (en) | 2009-06-23 | 2009-06-23 | Plastic ball valve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200589966U CN201434104Y (en) | 2009-06-23 | 2009-06-23 | Plastic ball valve structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201434104Y true CN201434104Y (en) | 2010-03-31 |
Family
ID=42052912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200589966U Expired - Lifetime CN201434104Y (en) | 2009-06-23 | 2009-06-23 | Plastic ball valve structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201434104Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776248A (en) * | 2014-01-11 | 2015-07-15 | 陈荣 | Three-way plastic ball valve |
| CN114645954A (en) * | 2022-04-15 | 2022-06-21 | 天津三御流体控制科技有限公司 | Non-metal fixed ball valve |
-
2009
- 2009-06-23 CN CN2009200589966U patent/CN201434104Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776248A (en) * | 2014-01-11 | 2015-07-15 | 陈荣 | Three-way plastic ball valve |
| CN114645954A (en) * | 2022-04-15 | 2022-06-21 | 天津三御流体控制科技有限公司 | Non-metal fixed ball valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100331 |