CN207920544U - Bi-metal double-pipe composite structure - Google Patents

Abstract

The utility model discloses a kind of bi-metal double-pipe composite structures comprising a tube body, tube body are composed of inner tube and an outer tube, are respectively arranged with expander end in the left and right ends of tube body, connection screw thread is processed on expander end；There are one locating pieces for setting on the left and right ends face of tube body；Connection screw thread connection on expander end is jointing, the left and right ends of jointing are provided with internal thread, there are one positioning convex platforms for setting at internal thread, gasket fixing groove is provided on positioning convex platform, it is fixed in gasket fixing groove that there are one the gaskets of annular, the utility model by designing above, the production efficiency of this bimetal tube can effectively be improved, its functional and intensity can be effectively ensured again, when being connected with jointing, directly the connection screw thread at tube body both ends can be threadedly coupled with it, and it can also regard seal nipple and use after the utility model assembles jointing.

Description

Bi-metal double-pipe composite structure

Technical field

The utility model is related to petroleum casing pipe technical field more particularly to a kind of bi-metal double-pipe composite structures.

Background technology

In petroleum casing pipe technical field, the petroleum casing pipe being typically used at present is mostly two metal tubes interference fit realization group Dress, after use, because outer tube aging and inner tube for a long time by impact force the reason of, between being susceptible between inner tube and outer tube Gap causes inner and outer tubes to loosen, and influences the service life of bi-metal double-pipe.

Improved by the prior art, the applicant is realized by being combined with inner tube after heating outer tube by external tube shrank The combination of inner and outer pipes, but such processing technology must have large-scale heating and feed apparatus that can just complete, and influence product Production efficiency.

The purpose of this utility model is to be effectively improved the speed of production of metal sleeve by new bi-metal double-pipe structure, Improve packaging efficiency when bi-metal double-pipe uses.

Invention content

The purpose of this utility model is to provide a kind of bi-metal double-pipe composite structures, to solve to exist in the prior art Foregoing problems.

To achieve the goals above, the technical solution adopted in the utility model is as follows：A kind of bi-metal double-pipe composite structure, It includes a tube body, and the tube body is composed of inner tube and an outer tube, and the left and right ends of the outer tube are machined with Connection screw thread；Inner and outer tubes are interference fitted to one, and expander end, the connection are respectively arranged in the left and right ends of tube body Screw thread process is on expander end；At least two locating slots are machined on the left and right ends face of the tube body respectively, in locating slot There are one locating pieces for interference fit；It is jointing to be connected with the connection screw thread on expander end, a left side for the jointing The right side is provided at both ends with internal thread, the positioning convex platform there are one settings at internal thread, and sealing is provided on the positioning convex platform Fixing groove is padded, is fixed in the gasket fixing groove there are one the gasket of annular, gasket is fixed on positioning convex platform and pipe Between body end portion.

On the gasket, the end at left and right sides of tube body is seal line.

Force slot and two force holes, the force there are two being uniformly arranged on the jointing, on outer diameter Slot and force Kong Juncheng 180 degrees are arranged on jointing outer wall, and the angle between adjacent force slot and force hole is 90 degree.

The utility model has the beneficial effects that：The utility model is interference fitted by designing above using inner and outer tubes Mode pipe inner and outer tubes are combined, two pipes combine after, to avoid inner and outer tubes part from axial dipole field occur, respectively in tube body Both ends expander, so that tube body both ends expander end is occurred prevents it from axial dipole field occur, by the way that locating piece is arranged at tube body both ends, prevents There is radial deflection in inner and outer tubes；Again by being threadedly coupled jointing in tube body end and being set between tube body and jointing Gasket is set, seal line is set in one end that gasket and tube body contact, designs through the above structure, it is double can effectively to improve this The production efficiency of metal tube, but its functional and intensity can be effectively ensured can be directly by tube body two when being connected with jointing The connection screw thread at end is threadedly coupled with it, and the utility model jointing is assembled after its can also regard seal nipple It uses, to sum up, the utility model is a kind of ideal bi-metal double-pipe composite structure.

Description of the drawings

Fig. 1 is the utility model dimensional structure diagram；

Fig. 2 is the utility model internal cross section structural schematic diagram；

Fig. 3 is the utility model locating piece assembly structure diagram；

Fig. 4 be in Fig. 2 A to structure enlargement diagram；

Fig. 5 be in Fig. 3 B to structure enlargement diagram；

Reference numeral：1- tube bodies, 2- expanders end, 3- connection screw threads, 4- jointings, 5- plastic cement seal nipples, 6- forces Slot, 7- forces hole, 8- outer tubes, 9- inner tubes, 10- positioning convex platforms, 11- gasket fixing grooves, 12- gaskets, 13- seal lines, 14- locating pieces, 15- locating slots.

Specific implementation mode

In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing, to this reality It is further elaborated with novel.It should be appreciated that the specific embodiments described herein are only used to explain this practicality It is novel, it is not used to limit the utility model.

A kind of bi-metal double-pipe composite structure a comprising tube body 1, the tube body 1 is by inner tube 9 and an outer tube 8 It is composed, the left and right ends of the outer tube 8 are machined with connection screw thread 3；Inner tube 9 and outer tube 8 are interference fitted to one, inner tube 9 and outer tube 8 combine after, expander end 2, the connection screw thread 3 are processed by pipe expanding device respectively in the left and right ends of tube body 1 Processing prevents inner and outer tubes from axial dipole field occur on expander end 2 by the expander end at both ends.

At least two locating slots 15 are machined on the left and right ends face of tube body 1 respectively, interference fit has one in locating slot 15 A locating piece 14 prevents inner tube 9 and outer tube 8 from radial deflection occur by locating piece 14.

It is jointing 4 on the expander end 2 of tube body 1, the left and right ends of jointing 4 are provided with internal thread, such as Fig. 4 It is shown, at the internal thread setting be provided with gasket fixing groove 11 on the positioning convex platform 10 there are one positioning convex platform 10, Fixed there are one the gasket 12 of annular in the gasket fixing groove 11, the gasket 12 is fixed on positioning convex platform 10 Between 1 end of tube body, the effect of gasket 12 herein is that leakage phenomenon occur after preventing tube body 1 and jointing 4 from fixing, Meanwhile the effect of positioning convex platform 10 is after jointing 4 and tube body 1 fully screw connection, positioning convex platform is by inner tube 9 and outer tube 8 stop simultaneously, further prevent 8 axial dipole field of inner tube 9 and outer tube.

Further to improve the sealability of gasket 12, spy is on gasket 12, close to the left and right sides of tube body 1 End position on be arranged seal line 13.

The jointing 4 is to play screw thread protective action by jointing 4, together when 1 shipment of tube body is transported When be also convenient for the joint connection in site of multistage tube body 1, connected with tube body 1 when for convenience of jointing 4 at the construction field (site), such as Fig. 1 and Fig. 3 It is shown, it is uniformly arranged on outer diameter there are two force slot 6 and two force holes 7, the force slot 6 and force hole 7 are in 180 Degree is arranged on the outer wall of jointing 4, and the angle between adjacent force slot 6 and force hole 7 is 90 degree；For preferably to even Internal thread on connector 4 is protected, and there are one plastic cement seal nipples 5 for bolt fixation on the jointing, most Protection of the realization to jointing 4 under the premise of reducing cost of limits.

To sum up, it designs through the above structure, the utility model can effectively improve production efficiency, and its work(can be effectively ensured The connection screw thread 3 at 1 both ends of tube body can be directly threadedly coupled by energy property and intensity when being connected with jointing 4 with it, And it can also regard seal nipple and use after the utility model assembles jointing 4, and to sum up, the utility model is a kind of reason The bi-metal double-pipe composite structure thought.

Claims (3)

1. a kind of bi-metal double-pipe composite structure comprising a tube body, the tube body combined by inner tube and an outer tube and At the left and right ends of the outer tube are machined with connection screw thread；It is characterized in that：Inner and outer tubes are interference fitted to one, The left and right ends of tube body are respectively arranged with expander end, and the connection screw thread is processed on expander end；The left and right of the tube body At least two locating slots are machined in both ends of the surface respectively, there are one locating pieces for the interior interference fit of locating slot；With the company on expander end It is jointing to connect threaded connection, and the left and right ends of the jointing are provided with internal thread, is arranged at internal thread There are one positioning convex platform, it is provided with gasket fixing groove on the positioning convex platform, is fixed in the gasket fixing groove One annular gasket, gasket are fixed between positioning convex platform and tube body end.

2. bi-metal double-pipe composite structure according to claim 1, it is characterised in that：On the gasket, close to pipe End at left and right sides of body is seal line.

3. bi-metal double-pipe composite structure according to claim 1, it is characterised in that：On the jointing, outside It is uniformly arranged on diameter there are two force slot and two force holes, the force slot and force Kong Juncheng 180 degrees setting are connecting On connector outer wall, the angle between adjacent force slot and force hole is 90 degree.