CN201162894Y

CN201162894Y - Screw connection type winding glass fibre reinforced plastic composite heat-insulation directly buried pipe

Info

Publication number: CN201162894Y
Application number: CNU2007200995975U
Authority: CN
Inventors: 张春来; 齐金生; 张宝城; 张月芹
Original assignee: HUANGHUA KANGHUA FRP CO Ltd
Current assignee: HUANGHUA KANGHUA FRP CO Ltd
Priority date: 2007-12-28
Filing date: 2007-12-28
Publication date: 2008-12-10
Anticipated expiration: 2017-12-28

Abstract

The utility model discloses a threaded connection type winding glass reinforced plastic composite heat preservation straight embedded pipe, which belongs to a combined rigid embedded pipe. The utility model comprises a glass reinforced plastic base pipe and a socket that respectively form an internal thread and an external thread, a heat preservation material layer that is enclosed around the circumstance of the base pipe and the socket, an external protection layer and a swell that is distributed around the external circumstance wall of the base pipe. A top groove that is parallel with the axial line of the base pipe is respectively formed in certain distance interval at the top of the internal thread and the external thread of a base pipe faucet and the socket; a root groove that is parallel with the axial line of the base pipe is formed at the root of the internal thread and the external thread. With such a design, the utility model not only ensures more solid combination of the winding glass reinforced plastic base pipe and the heat preservation layer, but also makes a solidified resin adhesive into a self-locking structure between the faucets as the groove is fully filled with the resin adhesive, thus preventing the occurrence of leakage, fracture and disengagement of the pipe faucet due to geological deformation.

Description

Screw connected fw frp complex heat-preservation direct buried pipe

Technical field

The utility model relates to combination rigidity underground pipe, is a kind of screw connected fw frp complex heat-preservation direct buried pipe with intensity height, corrosion-resistant and polyurethane as thermal insulating material specifically.

Background technique

Usually, when carrying underground heat to supply water and being corrosive fluid, adopt joint socket to connect the fw frp thermal insulation pipe as conveyance conduit.

Chinese patent 2514200 discloses a kind of " fiber reinforced plastic pipe ", bellmouth, straight length and columniform socket by expansion shape are formed, be characterized in: pipe material is a glass fibre reinforced plastics, the bellmouth of one end is expansion shape, with the pipe shaft straight length one changeover portion is arranged, the bellmouth port is a chamfering, the other end is a socket, it is shaped as hollow cylinder, with the pipe shaft straight length one changeover portion is also arranged, its periphery is provided with 1-2 bar groove, in order to be nested with rubber seal, rubber seal is the seal ring of water-swellable, and its expansivity is 1.5-2 a times of volume.

Chinese patent 1067952 discloses a kind of " glass fibre reinforced plastics jacketed heat insulating pipeline and forming method thereof "; this insulation pipe with glass fibre reinforced plastics jacketed as protecting sheathing; between protecting sheathing and steel pipeline, fill diffusing shape thermoinsulation materials such as perlite, rock wool, uniformly-spaced fill bearing ring simultaneously vertically.Its forming method mainly is first employing " mold method " or " rolling method " prefabricated glass fibre reinforced plastics shell, then steel pipeline is inserted in the glass fibre reinforced plastics shell, and filling heat insulator and bearing ring between the two are installed end socket and support device at last again.The present invention has sealing and good heat insulating, and is cheap, and the serviceability temperature height is difficult for advantages such as aging, is comparatively ideal built on stilts gathering lines such as chemical plant, oil field.

Chinese patent 2426057 discloses a kind of " heat-insulation and heat-preservation Glass Steel Tube ", is to coat the foamed plastics that one deck plays the heat-insulation and heat-preservation effect, its outer fw frp again outside glass fibre reinforced plastics is responsible for.The utility model be responsible for to adopt glass fibre reinforced plastics, and is corrosion-resistant, flow resistance is little, is responsible for the frp layer of outer cladding foam thermal insulation thermal insulation layer and protection foamed plastics, good heat-insulation effect, long service life, easily installs.As transport pipe the time, the heating station standoff distance that can extend, flow is big simultaneously.The utility model can be used as the pipeline of oil transportation, defeated hot water, uses at cold area, can prevent condensing of wax class high-melting-point composition in the crude oil, saves the energy, also can prevent water freezing and the pipe explosion accident that freezes and cause.

But, traditional joint socket connects the Placement of fw frp insulation pipe, having caused in conveying has in the engineering practice of temperature and temperature guarantee requirement, because of throwing off phenomenon in a large amount of pipeline breaks, joint socket joint that geological deformation occurs, cause engineering normally not move, to such an extent as to people have lost the confidence of using the fw frp insulation pipe.And because normally used fw frp thermal insulation pipe is to cover to cover thermal insulating material outside smooth parent tube, it is not firm to cause parent tube to combine with thermal insulating material.Once had joint socket to form the fw frp insulation pipe of internal and external threads respectively, also because of internal and external threads in conjunction with not firm, cause joint socket loosening and the seepage phenomenon takes place,

Summary of the invention

The utility model is exactly to connect not firm for the joint socket that solves the fw frp thermal insulation pipe, caused in conveying has the engineering practice of temperature and temperature guarantee requirement, to have a large amount of pipe leakages, fracture, joint socket joint and throw off problem, and a kind of screw connected fw frp complex heat-preservation direct buried pipe is provided.

The utility model designs by following technological scheme.

A kind of screw connected fw frp complex heat-preservation direct buried pipe, comprise the fw frp parent tube and be formed with the joint socket of internal and external threads respectively, parent tube and bellmouth periphery thereof are covered adiabator layer, the external protection that covers successively, and are formed with the projection of distribution at the periphery wall of fw frp parent tube; The internal and external screw thread top of the socket of fw frp parent tube and bellmouth keeps at a certain distance away and is formed with top groove with the parent tube parallel to an axis respectively; The internal and external screw thread root of the socket of fw frp parent tube and bellmouth keeps at a certain distance away and is formed with the root groove parallel with the parent tube axial direction respectively.

She Ji the utility model because fw frp parent tube periphery wall is formed with the projection of distribution, and does not clad smooth polyester film like this, makes it more firm with combining of adiabator layer; Because internal and external screw thread top and root at socket and bellmouth are formed with top groove and the root groove that is full of resin binder respectively, make resin binder after the curing become self-locking structure between the joint socket, pipeline joint socket seepage, fracture and disengagement phenomenon have been avoided because of geological deformation occurs, it has the characteristics of direct-burried, uses as conveyance conduit in the engineering of carrying underground heat to supply water and to be corrosive fluid and to have insulation to require.

Description of drawings

Fig. 1 is the utility model vertical profile structural representation;

Fig. 2 a is the utility model jack part vertical profile structural representation;

Fig. 2 b is that the A of Fig. 2 a is to partial view;

Fig. 3 is the utility model bonding state vertical profile structural representation.

Among the figure: 1. fw frp parent tube 2. bellmouths

3. socket 4. adiabator layers

5. external protection 6. internal threads

7. outside thread 8. projectioies

9. 10. grooves of top groove

11. sealant tape 12. butt joints

13.14. resin binder.

Embodiment

Below in conjunction with drawings and Examples the utility model is described in detail.

A kind of screw connected fw frp complex heat-preservation direct buried pipe, comprise fw frp parent tube 1 and

joint socket

2,3 thereof, be formed with internal and

external threads

6,7 respectively, parent tube and bellmouth 2 peripheries thereof are covered adiabator layer 4 external protections 5 that cover successively, and are formed with the projection 8 of distribution at the periphery wall of fw frp parent tube 1; The socket 3 of fw frp parent tube 1 and the internal and external screw thread of bellmouth 26,7 tops keep at a certain distance away and are formed with top groove 9 with the parent tube parallel to an axis respectively, and the socket 3 of fw frp base 1 keeps at a certain distance away with the internal and external screw thread of bellmouth 26,7 roots and is formed with the root groove 10 parallel with the parent tube axial direction respectively.

Fig. 2 a is the vertical profile structural representation that the utility model jack part amplifies, and the utility model bellmouth 2 parts are not given diagram, but its top groove 9 is identical with socket 3 with root groove 10 structures.

Described screw connected fw frp complex heat-preservation direct buried pipe, when the projection 8 that its parent tube 1 periphery wall scatters is making, unsaturated polyester resin and the mixed solidfied material of dicalcium powder extruded when twining glass fiber.Projection is uneven because the parent tube outer circumferential face no longer clads smooth polyester film, thereby makes fw frp parent tube 1 more firm with combining of adiabator layer 4.The solidfied material projection diameter 3-6mm that forms, high 1-2mm.

Described screw connected fw frp complex heat-preservation direct buried pipe, its top groove 9, root groove 10 cross sections are square.Top groove 9 forms dark, wide each 1-2mm; Root groove 10 forms dark, wide each 1-2.5mm.And can form the different groove of depth width according to the pitch of internal and

external screw thread

6,7.

Described screw connected fw frp complex heat-preservation direct buried pipe, its top groove 9, root groove 10 cross sections are concave arc shape (not shown).Thereby strengthened the bearing capacity of pipeline bellmouth 2.

Described screw connected fw frp complex heat-preservation direct buried pipe, the top groove 9 at its internal and

external screw thread

6,7 tops is identical with root groove 10 spacings of internal and external screw thread root.

During on-the-spot the installation, respectively resin binder 14 is coated on the internal thread 6 and outside thread 7 of the socket 3 of 2 fw frp parent tubes 1 and bellmouth 2, and make top groove 9, root groove be full of resin binder 13 for 10 li, socket 3 and bellmouth 2 are spirally connected, make the butt joint 12 of two fw frp parent tubes 1 tight, at last, use sealant tape 11 to hold along butt joint 12.After the resin binder 13 that top groove 9, root groove are 10 li solidifies, promptly become the self-locking structure between the joint socket, the jail is inseparable.Because fw frp parent tube 1 and bellmouth 2 peripheries thereof are covered and are covered with adiabator layer and external protection, make that pipeline after the connection is complete to have a heat insulation function.

Claims

1. screw connected fw frp complex heat-preservation direct buried pipe comprises the fw frp parent tube and is formed with the joint socket of internal and external threads respectively, and parent tube and bellmouth periphery thereof are covered adiabator layer, the external protection that covers successively, it is characterized in that:

A. the periphery wall of fw frp parent tube is formed with the projection of distribution;

B. the internal and external screw thread top of the socket of fw frp parent tube and bellmouth keeps at a certain distance away and is formed with top groove with the parent tube parallel to an axis respectively; The internal and external screw thread root of the socket of fw frp parent tube and bellmouth keeps at a certain distance away and is formed with the root groove parallel with the parent tube axial direction respectively.

2. screw connected fw frp complex heat-preservation direct buried pipe according to claim 1 is characterized in that top groove, root trench cross section are square.

3. screw connected fw frp complex heat-preservation direct buried pipe according to claim 1 is characterized in that top groove, root trench cross section are concave arc shape.

4. screw connected fw frp complex heat-preservation direct buried pipe according to claim 1 is characterized in that the top groove at internal and external screw thread top is identical with the root groove pitch of root.