CN206468939U - The Hermetical connecting structure of thin walled hard metal circular tube - Google Patents

The Hermetical connecting structure of thin walled hard metal circular tube Download PDF

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Publication number
CN206468939U
CN206468939U CN201720119683.1U CN201720119683U CN206468939U CN 206468939 U CN206468939 U CN 206468939U CN 201720119683 U CN201720119683 U CN 201720119683U CN 206468939 U CN206468939 U CN 206468939U
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CN
China
Prior art keywords
joint
circular tube
sub
connector
metal circular
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
Application number
CN201720119683.1U
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Chinese (zh)
Inventor
周万杰
Original Assignee
周万杰
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Filing date
Publication date
Application filed by 周万杰 filed Critical 周万杰
Priority to CN201720119683.1U priority Critical patent/CN206468939U/en
Application granted granted Critical
Publication of CN206468939U publication Critical patent/CN206468939U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of Hermetical connecting structure of thin walled hard metal circular tube, include connector, hard metal pipe and cap, the connection end of connector and the connection end of metal circular tube form sub- joint and the female joint for the smooth conical surface being mutually inserted respectively, the connection end of cap ferrule metal pipe and connector is fastenedly connected, the female joint of metal circular tube is crimped on the sub- joint of connector, the cone angle of sub- joint conical surface is more than the cone angle of female joint conical surface.The utility model Hermetical connecting structure is by setting the taper between sub- joint and female joint poor, the axial compressive force applied using cap, the taper of thin walled hard metal circular tube female joint is set to produce elastic deformation along side, a tight fit annular seal band persistently pressed is formed in the conical contact surface construction of the sub- joint of connector, from without by other seals with regard to good sealing effectiveness can be reached, realize being tightly connected without seal for thin walled hard metal circular tube, can effective extending connector service life.

Description

The Hermetical connecting structure of thin walled hard metal circular tube
Technical field
Technical field is tightly connected the present invention relates to metal tube, the sealing of the hard metal pipe such as stainless steel is referred in particular to Attachment structure.
Background technology
The conveying of the civilian conventional low voltage fluid such as medium such as running water, natural gas, has begun to using more reliable performance This hard metal pipe of thin-wall stainless steel, such as " corrugated stainless steel tubing ", " double card pressure thin-wall stainless steel ".These hard The plastically deformed performance of metal circular tube is poor, but deformation behavior is good.Sealing between thin-wall stainless steel and connector is both needed to It could be realized by rubber-like seal, and most diverse between the life-span of these seals and stainless steel life-span, once aging, Pipeline be generally it is hidden in the case of be difficult to change, therefore into " short slab " and hidden danger of stainless steel pipe-line system.
Thin metallic tubd without the direct Butt sealing mode of rubber cushion is currently limited to the soft tubing such as copper tube, its principle It is to allow the hard metal sealing surface of pipe fitting and the sealing surface of copper pipe to extrude mutually, forces the sealing surface of copper pipe to produce after plastic deformation With pipe fitting sealing surface tight connecting, so as to reach sealing purpose.But stainless steel material is larger due to hardness, what screw thread was provided squeezes Insufficient pressure can not be realized between metal covering with allowing the sealing surface of stainless steel pipe to produce plastic deformation as copper pipe Directly contact sealing, therefore can only carry out various be tightly connected by rubber-like seal at present.
The content of the invention
The technical problem to be solved in the present invention is to provide one kind hard metal pipe sealing company is achieved that without seal The structure connect.
To solve the technical scheme that above-mentioned technical problem is used:A kind of thin walled hard metal circular tube is tightly connected knot Structure, includes connector, hard metal pipe and cap, and the connection end of connector and the connection end of metal circular tube are formed respectively The connection end fastening of the sub- joint for the smooth conical surface being mutually inserted and female joint, cap ferrule metal pipe and connector connects Connect, the female joint of metal circular tube be crimped on the sub- joint of connector, it is characterised in that:The cone of the sub- joint conical surface Angle is more than the cone angle of female joint conical surface.
It may be preferred that the sub- joint and the taper of female joint difference is between 1 ° to 10 °.
More it may be preferred that the sub- joint and the taper of female joint difference are 5 °.
It may be preferred that the cap is nut.
The beneficial effect brought using the present invention:Hermetical connecting structure of the present invention by set sub- joint and female joint it Between taper it is poor, the axial compressive force applied using cap makes the taper of thin walled hard metal circular tube female joint produce elasticity along side Deformation, forms the tight fit annular seal band that persistently presses in the conical contact surface construction of the sub- joint of connector, from without Good sealing effectiveness just need to can be reached by other seals, realize that being sealed without seal for thin walled hard metal circular tube connects Connect, can effective extending connector service life.
Brief description of the drawings
Fig. 1 is the schematic diagram of the Hermetical connecting structure of thin walled hard metal circular tube of the present invention.
Embodiment
As shown in figure 1, a kind of Hermetical connecting structure of thin walled hard metal circular tube, includes connector 1, hard metal circle Pipe 2 and cap 3, the connection end of connector 1 and the connection end of metal circular tube 2 form the smooth conical surface being mutually inserted respectively Sub- joint 11 and female joint 21, the connection end of the ferrule metal pipe 2 of cap 3 and connector 1 is fastenedly connected, metal circular tube 2 Female joint 21 be crimped on the sub- joint 11 of connector 1, the cone angle of the conical surface of sub- joint 11 in the present invention connects more than mother The cone angle of first 21 conical surface.
Because the taper existed between sub- joint 11 and female joint 21 is poor, 3 couples of mothers of cap after being fastenedly connected with connector 1 Joint applies axial compressive force, and female joint 21 is tightly crimped on sub- joint 11, makes the taper of the female joint 21 of metal circular tube 2 along side Elastic deformation is produced, a close-fitting ring-type persistently pressed is formed in the conical contact surface construction of the sub- joint 11 of connector 1 Band, from without that just can reach good sealing effectiveness by other seals, realizes the nothing of thin walled hard metal circular tube Seal is tightly connected, can effective extending connector service life.
Usually, the taper difference of sub- joint 11 and female joint 21 can be set between 1 ° to 10 °.As preferably scheme, The taper difference of sub- joint 11 and female joint 21 can be set to 5 °.The taper of sub- joint 11 in such as the present embodiment is set to 65 °, mother The taper of joint 21 is then set to 60 °.
Installed for convenience of the connection of joint, the cap 3 uses nut, pass through nut and the connection end screw thread of connector 1 Connection, not only facilitates joint installation, more may be such that the crimping of sub- joint 11 and female joint 21 is even closer.

Claims (4)

1. a kind of Hermetical connecting structure of thin walled hard metal circular tube, includes connector, hard metal pipe and cap, even The connection end of fitting and the connection end of metal circular tube form sub- joint and the female joint for the smooth conical surface being mutually inserted respectively, The connection end of cap ferrule metal pipe and connector is fastenedly connected, and the son that the female joint of metal circular tube is crimped on connector connects On head, it is characterised in that:The cone angle of the sub- joint conical surface is more than the cone angle of female joint conical surface.
2. the Hermetical connecting structure of thin walled hard metal circular tube according to claim 1, it is characterised in that:The sub- joint And the taper difference of female joint is between 1 ° to 10 °.
3. the Hermetical connecting structure of thin walled hard metal circular tube according to claim 2, it is characterised in that:The sub- joint Taper difference with female joint is 5 °.
4. according to the Hermetical connecting structure of any described thin walled hard metal circular tubes of claim 1-3, it is characterised in that:It is described Cap is nut.
CN201720119683.1U 2017-02-08 2017-02-08 The Hermetical connecting structure of thin walled hard metal circular tube Expired - Fee Related CN206468939U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720119683.1U CN206468939U (en) 2017-02-08 2017-02-08 The Hermetical connecting structure of thin walled hard metal circular tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720119683.1U CN206468939U (en) 2017-02-08 2017-02-08 The Hermetical connecting structure of thin walled hard metal circular tube

Publications (1)

Publication Number Publication Date
CN206468939U true CN206468939U (en) 2017-09-05

Family

ID=59704662

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720119683.1U Expired - Fee Related CN206468939U (en) 2017-02-08 2017-02-08 The Hermetical connecting structure of thin walled hard metal circular tube

Country Status (1)

Country Link
CN (1) CN206468939U (en)

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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: 20170905

Termination date: 20200208