CN207421571U - A kind of interior NPTF thread conicals sealing transit joint - Google Patents
A kind of interior NPTF thread conicals sealing transit joint Download PDFInfo
- Publication number
- CN207421571U CN207421571U CN201721385391.9U CN201721385391U CN207421571U CN 207421571 U CN207421571 U CN 207421571U CN 201721385391 U CN201721385391 U CN 201721385391U CN 207421571 U CN207421571 U CN 207421571U
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- CN
- China
- Prior art keywords
- thread
- connecting tube
- conicals
- interior
- nptf
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- 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
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Abstract
The utility model is related to Tube jointer fields, more particularly to a kind of interior NPTF thread conicals sealing transit joint, including connecting tube and fixing piece, fixing piece is arranged on the middle part lateral wall of connecting tube, the inner wall of connecting tube is equipped with internal thread, fixing piece includes being integrally formed the fixing nut in the middle part of the connecting tube on lateral wall, internal thread is the slope screw thread extended from the middle part of connecting tube to both ends, a kind of interior NPTF thread conicals sealing transit joint of the utility model can reach good oil circuit sealing effect without complicated sealing process, and a connecting tube can connect two oil pipes, it is easy to use.
Description
Technical field
The utility model is related to Tube jointer field, more particularly to a kind of interior NPTF thread conicals sealing transit joint.
Background technology
Conduit coupling is a kind of building, industrial production part, for connecting various pipelines, such as water pipe, oil pipe, combustion gas
The pipe fittings such as pipe, wherein the connection of many pipe fittings needs reliable leakproofness, and in practical engineering application, many connectors
Sealing problem causes situations such as oil leak to happen occasionally, and the conversion of port connection is very inconvenient.
The content of the invention
The purpose of this utility model is that in view of the deficiencies of the prior art, a kind of interior NPTF thread conicals sealing transition is provided and is connect
Head.
To solve the above problems, the utility model provides following technical scheme：
A kind of interior NPTF thread conicals sealing transit joint, including connecting tube and fixing piece, the fixing piece is arranged on connection
On the middle part lateral wall of pipe, the inner wall of connecting tube is equipped with internal thread, and the fixing piece includes being integrally formed outer in the middle part of connecting tube
Fixing nut on side wall, the internal thread are the slope screw thread extended from the middle part of connecting tube to both ends.
Preferably, the middle part of the outer connecting tube without leave of the slope screw thread is gradually reduced to connecting tube axial direction both ends.
Preferably, the depth of thread of at least 4 times slope screw threads of the wall thickness of the connecting tube.
Preferably, the ramp angles of the slope screw thread are between 1 degree to 5 degree.
Preferably, the ramp angles of the slope screw thread are 3 degree.
Preferably, the width of the connecting tube is at least 4 times of the width of fixing nut.
Preferably, the angle of the form of thread two sides in the internal thread axial cross section is 60 degree.
Preferably, the fixing nut is hex nut.
Advantageous effect：A kind of interior NPTF thread conicals sealing transit joint of the utility model, using NPTF thread gages made in U.S.A
Lattice in connected pipes, the internal thread at the both ends that oil pipe passes through connecting tube are connected, fixing nut is clamped with spanner, by oil
It manages and is tightened with the both ends of connecting tube, when tightening, due to the presence of slope screw thread, oil pipe is more stubborn tighter with connecting tube, without volume
Outer addition sealing process can reach very strong sealed connection effect, and the interior NPTF thread conicals sealing transit joint is without complexity
Sealing process can reach good oil circuit sealing effect, and a connecting tube can connect two oil pipes, easy to use.
Description of the drawings
Fig. 1 show the dimensional structure diagram of the utility model；
Fig. 2 show the partial sectional view of the utility model；
Reference sign：Connecting tube 1, fixing nut 2, slope screw thread 3.
Specific embodiment
With reference to Figure of description and embodiment, specific embodiment of the utility model is described in further detail：
Referring to figs. 1 to a kind of interior NPTF thread conicals sealing transit joint shown in Fig. 2, including connecting tube 1 and fixing piece, institute
It states fixing piece to be arranged on the middle part lateral wall of connecting tube 1, the inner wall of connecting tube 1 is equipped with internal thread, and the fixing piece includes one
The body formed fixing nut 2 on 1 middle part lateral wall of connecting tube, the internal thread are to extend from the middle part of connecting tube 1 to both ends
Slope screw thread 3.
The middle part of the outer connecting tube without leave 1 of the slope screw thread 3 is gradually reduced to the axial both ends of connecting tube 1, with
When the external screw thread of oil pipe is tightened, due to the presence of slope screw thread 3, connection can be more and more tighter, more and more securely, sealing effect pole
It is good.
The depths of thread of at least 4 times slope screw threads 3 of wall thickness of the connecting tube 1, screw thread are unlikely to too deep and are tightening
In the process rupture connecting tube 1.
For the ramp angles of the slope screw thread 3 between 1 degree to 5 degree, ramp angles, which cross conference, produces oil pipe and connecting tube 1
Life is rocked, and angle too small can make the big heavy discount of sealing effect.
The ramp angles of the slope screw thread 3 are 3 degree, and connecting tube 1 uses angle to take into account sealing for 3 degree of slope screw thread 3
Effect and stable connection.
The width of the connecting tube 1 is at least 4 times of the width of fixing nut 2, ensure that the jail of 1 middle part of connecting tube
Solidity.
The angle of form of thread two sides in the internal thread axial cross section is 60 degree, and the standard of U.S. standard screw thread is tooth
Type angle is equal to 60 degree, can be adapted to the pipe fitting for using U.S. standard screw thread specification on the market.
The fixing nut 2 is hex nut, and convenient wrench is fixedly connected with pipe 1 and is connected with pipe fitting.
Operation principle：Using NPTF screw threads specification made in U.S.A, in connected pipes, both ends that oil pipe is passed through into connecting tube 1
Internal thread connects, and clamps fixing nut 2 with spanner, oil pipe and the both ends of connecting tube 1 are tightened, when tightening, due to slope
The presence of screw thread 3, oil pipe is more stubborn tighter with connecting tube 1, and very strong sealed connection is can reach without additionally adding sealing process
Effect.
The above descriptions are merely preferred embodiments of the present invention, and not the technical scope of the utility model is made
Go out any restrictions, thus it is every any trickle amendment made according to the technical essence of the utility model to above example, equivalent
Variation and modification, in the range of still falling within the technical solution of the utility model.
Claims (8)
1. a kind of interior NPTF thread conicals sealing transit joint, it is characterised in that：Including connecting tube（1）And fixing piece, the fixation
Part is arranged on connecting tube（1）Middle part lateral wall on, connecting tube（1）Inner wall be equipped with internal thread, the fixing piece include one
It is molded over connecting tube（1）Fixing nut on the lateral wall of middle part（2）, the internal thread is from connecting tube（1）Middle part to both ends
The slope screw thread of extension（3）.
2. a kind of interior NPTF thread conicals sealing transit joint according to claim 1, it is characterised in that：The slope screw thread
（3）Outer connecting tube without leave（1）Middle part to connecting tube（1）Axial both ends are gradually reduced.
3. a kind of interior NPTF thread conicals sealing transit joint according to claim 2, it is characterised in that：The connecting tube
（1）Wall thickness at least 4 times of slope screw threads（3）The depth of thread.
4. a kind of interior NPTF thread conicals sealing transit joint according to claim 3, it is characterised in that：The slope screw thread
（3）Ramp angles between 1 degree to 5 degree.
5. a kind of interior NPTF thread conicals sealing transit joint according to claim 4, it is characterised in that：The slope screw thread
（3）Ramp angles be 3 degree.
6. a kind of interior NPTF thread conicals sealing transit joint as claimed in any of claims 1 to 5, feature exist
In：The connecting tube（1）Width be at least fixing nut（2）4 times of width.
7. a kind of interior NPTF thread conicals sealing transit joint as claimed in any of claims 1 to 5, feature exist
In：The angle of form of thread two sides in the internal thread axial cross section is 60 degree.
8. a kind of interior NPTF thread conicals sealing transit joint as claimed in any of claims 1 to 5, feature exist
In：The fixing nut（2）For hex nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721385391.9U CN207421571U (en) | 2017-10-25 | 2017-10-25 | A kind of interior NPTF thread conicals sealing transit joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721385391.9U CN207421571U (en) | 2017-10-25 | 2017-10-25 | A kind of interior NPTF thread conicals sealing transit joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207421571U true CN207421571U (en) | 2018-05-29 |
Family
ID=62308774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721385391.9U Expired - Fee Related CN207421571U (en) | 2017-10-25 | 2017-10-25 | A kind of interior NPTF thread conicals sealing transit joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207421571U (en) |
-
2017
- 2017-10-25 CN CN201721385391.9U patent/CN207421571U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20180529 Termination date: 20201025 |