CN214064177U

CN214064177U - Plastic-lined composite pipe quick-connecting elbow

Info

Publication number: CN214064177U
Application number: CN202023172878.3U
Authority: CN
Inventors: 滕蓓
Original assignee: Shanghai Milan Pipe System Develop Co ltd
Current assignee: Shanghai Milan Pipe System Develop Co ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-08-27
Anticipated expiration: 2030-12-24

Abstract

The plastic-lined composite pipe quick-connection elbow comprises an outer elbow (3) and an inner elbow (4); the inner bent pipe (4) is connected with the inner bent pipe (3) in an inner lining way; a cavity is arranged between the inner wall of the outer bent pipe (3) and the outer wall of the inner bent pipe (4); the outer wall of the outer bent pipe (3) is provided with a glue injection hole (31), the inner wall of the inner bent pipe (4) is provided with a pressure reduction exhaust hole (32), and the glue injection hole (31) and the pressure reduction exhaust hole (32) are communicated with a cavity between the outer bent pipe (3) and the inner bent pipe (4). The method is suitable for working conditions and scenes with strict working conditions.

Description

Plastic-lined composite pipe quick-connecting elbow

Technical Field

The utility model relates to a structure improvement technique that the elbow of compound pipe is moulded to steel is connected to and the end structure of compound pipe is moulded to the steel of optimizing, especially the lining is moulded compound pipe and is connect the elbow soon.

Background

The steel-plastic composite pipe is produced with seamless steel pipe and welded steel pipe as base pipe and has inner wall coated with polyethylene powder paint or epoxy resin paint with high adhesion, high corrosion resistance and food level hygiene. The water-supply galvanized internal plastic-coated composite steel pipe manufactured by adopting the processes of pretreatment, preheating, internal coating, leveling and post-treatment is an upgraded product of the traditional galvanized pipe, and the steel-plastic composite pipe is generally connected by screw threads, grooves and flanges.

There are many classifications of steel-plastic composite pipes, which can be classified according to the structure of the pipe: steel-band reinforced steel-plastic composite pipe, seamless steel-tube reinforced steel-plastic composite pipe, mesh steel-band steel-plastic composite pipe and steel-wire mesh skeleton steel-plastic composite pipe. At present, the most popular steel-plastic composite pipe in the market is a steel-plastic composite pipe, namely a steel-plastic composite pressure pipe which is often called, the middle layer of the pipe is a steel belt layer formed by welding a high-carbon steel belt in a butt joint mode through curling, and the inner layer and the outer layer are both high-density polyethylene (HDPE). The middle layer of the pipe is a steel belt, so the pressure-bearing performance of the pipe is very good, different from the situation that the pressure-bearing capacity of an aluminum belt is not high, the maximum caliber of the pipe can only be 63mm, and the maximum caliber of a steel-plastic pipe can be 200mm or even larger; because the steel band in the middle layer of the pipe is closed, the steel-plastic pipe has the function of oxygen resistance at the same time, can be directly used for direct drinking water engineering, and has very good corrosion resistance because the inner layer and the outer layer are made of plastic materials. The excellent performance makes the steel-plastic composite pipe have wide application, and the body shadow of the pipe can be seen in various fields such as petroleum and natural gas transportation, industrial and mining pipes, drinking water pipes, drainage pipes and the like.

The traditional metal pipe threaded connection structure is selected for use at the connection position infrequently to current steel-plastic pipe, and this kind of connected mode is comparatively loaded down with trivial details when the pipeline installation, and is higher to the precision requirement of production link in addition, and in use, because the bulging deformation is big when cold and hot change, easily takes place the creep in the use, takes place to line even and moulds the pipeline and removes the easy corrosion scale deposit of metal pipe, and the plastic tubing is anti ultraviolet radiation not, influences life.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a compound pipe meets the elbow soon is moulded to the lining, and the structural advantage is moulded to the performance lining, realizes the high-speed joint installation, solves above prior art problem.

The purpose of the utility model is realized by the following technical measures: a lining plastic composite pipe quick-connecting elbow comprises an outer elbow and an inner elbow; the inner bent pipe is lined in the outer bent pipe; a cavity is arranged between the inner wall of the outer bent pipe and the outer wall of the inner bent pipe; the outer wall of the outer bent pipe is provided with a glue injection hole, the outer wall of the inner bent pipe is provided with a pressure reduction exhaust hole, and the glue injection hole and the pressure reduction exhaust hole are communicated with a cavity between the outer bent pipe and the inner bent pipe.

Particularly, a supporting net is arranged between the inner wall of the outer bent pipe and the outer wall of the inner bent pipe. The supporting net is of a spiral structure; the supporting net is an elastic structure.

In particular, the pressure reducing exhaust hole is of a cone opening structure with a small outside and a large inside.

In particular, the inner edge of the outer elbow port and the outer edge of the inner elbow port are provided with inclined plane guide tapers.

Particularly, a glue injection nozzle is inserted in the glue injection hole; the outer wall of the glue injection nozzle is provided with a surrounding ring-shaped cutting groove.

The utility model discloses an advantage and effect: the pipe joint is sealed once, is completely isolated by a conveyed medium and a metal structure, avoids the phenomenon that a traditional metal pipeline is polluted by the conveyed medium, is free of scaling, small in flow choking, sanitary, non-toxic, high in compressive strength, strong in ultraviolet resistance tolerance function, excellent in outdoor application effect, good in impact resistance, high in rigidity, small in deformation, safe, reliable and long in service life, and is particularly suitable for working conditions and scenes with strict working conditions.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

The reference numerals include:

a-steel-plastic composite pipe, B-malleable steel pipe fitting, 1-steel outer pipe, 2-inner lining plastic pipe, 3-outer bent pipe, 4-inner bent pipe, 5-injection molding inner connecting sleeve, 6-support net and 7-glue injection nozzle; 21-outward turning and rolling port, 31-glue injection hole, 32-decompression exhaust hole and 71-ring cut groove.

Detailed Description

The utility model discloses the principle lies in, and the design is to inserting and combining inner chamber injecting glue fixed knot structure, accomplishes pipe connector and sealed simultaneously.

The utility model discloses application scope includes the cold and hot water supply system of the house of civilian water supply and commercial building, the civilian drinking water and the industrial pure water supply pipe system of water purification supply, and the chemical liquid and the industrial water supply pipe system are carried as being used as to industrial water supply to and the house heating and the solar energy facility pipe network of heating pipe, mineral affairs and municipal works and agriculture, boats and ships pipeline and air conditioning system.

The present invention will be further explained with reference to the drawings and examples.

Example 1: when the steel-plastic composite pipe A is connected with the malleable steel pipe fitting B of the steel-plastic composite elbow joint structure, the steel-plastic composite pipe A comprises a steel outer pipe 1 and a lining plastic pipe 2; as shown in the attached figure 1, the malleable cast iron pipe fitting B serving as a plastic-lined composite pipe quick-connection elbow comprises an outer elbow 3 and an inner elbow 4; the inner bent pipe 4 is connected with the inner bent pipe 3 in an inner lining way; a cavity is arranged between the inner wall of the outer elbow 3 and the outer wall of the inner elbow 4; the outer wall of the outer bent pipe 3 is provided with a glue injection hole 31, the inner wall of the inner bent pipe 4 is provided with a pressure reduction exhaust hole 32, and the glue injection hole 31 and the pressure reduction exhaust hole 32 are communicated with a cavity between the outer bent pipe 3 and the inner bent pipe 4.

In the foregoing, a support net 6 is arranged between the inner wall of the outer bend 3 and the outer wall of the inner bend 4. The supporting net 6 is of a spiral structure; the supporting net 6 is of an elastic structure.

In the above description, the decompression exhaust hole 32 has a tapered structure with a small outside and a large inside.

In the above, the inner edge of the end of the outer bend 3 and the outer edge of the end of the inner bend 4 are provided with inclined guide tapers.

In the foregoing, the glue injection nozzle 7 is inserted into the glue injection hole 31; the outer wall of the glue injection nozzle 7 is provided with a surrounding ring-shaped cut groove 71.

The embodiment of the utility model provides an in, compound pipe A is moulded to the steel, malleable cast iron pipe spare B is to inserting, and compound pipe A outer wall is moulded to the steel cup joints the silica gel sealing washer, and the metal pipe end border of 3 outer return bends of protection with the pipe end inarching of malleable cast iron pipe spare B's outer return bend 3.

In the embodiment of the utility model, the outer elbow 3 and the inner elbow 4 are respectively made of the same material as the outer steel pipe 1 and the inner plastic lining pipe 2; the glue injection nozzle 7 is preferably made of metal or ceramic material with corrosion resistance and ultraviolet resistance not lower than those of the steel outer pipe 1.

In the embodiment of the utility model, when the connection is applied, the steel-plastic composite pipe A and the malleable cast iron pipe fitting B are inserted and connected, in the process, the taper structures of the inner walls of the ports of the steel-plastic composite pipe A and the malleable cast iron pipe fitting B play a role in guiding, moreover, the support net 6 provides deformation with certain tension for matching, the outer edge of the port of the steel outer pipe 1 is tightly attached to the outer bent pipe 3 and inserted along the inner wall, and the inner edge of the port of the inner lining plastic pipe 2 is tightly attached to the inner edge of the port of the inner bent pipe 4 and inserted along the outer wall; after the inserting is in place, inserting an adhesive injection nozzle 7 into an adhesive injection hole 31 formed in the outer bent wall of the outer bent pipe 3 of the malleable cast iron pipe fitting B, injecting a colloid filling material such as polyurethane into a cavity between the metal outer bent pipe 3 and the plastic-lined inner bent pipe 4, enabling the filling material to flow to a decompression exhaust hole 32 on the inward bent side quickly after being pressed, and quickly filling the cavity and pressurizing and impact-extruding the filling material into an insertion joint of the inner wall of the port of the steel-plastic composite pipe A and the malleable cast iron pipe fitting B after being exhausted by the decompression exhaust hole 32 under the throttling effect of a conical opening structure of the decompression exhaust hole 32, wherein the insertion joint is filled with an embedding rubber groove formed by an outward-turned coil opening 21 to form a firm and sealed undetermined embedding and fixing structure, and at the moment, a filler possibly slightly overflows the decompression exhaust hole 32; the glue injection is stopped, and after the glue is shaped into the injection molding inner connecting sleeve 5, the glue injection nozzle 7 is broken along the ring-shaped groove 71 to reduce the exposed area of the glue filling material and protect the edge of the glue injection hole 31.

The embodiment of the utility model provides an in, the 5 backs of stereotyping of plug bush in the injection moulding, inside supporting network 6 turns into elasticity strengthening rib structure in step, make compound pipe A is moulded to the steel, among the malleable cast iron pipe fitting B connection structure, really form the steel and mould and be the macroscopical composite system that combines to form the not components of a whole that can function independently of layering through middle one deck adhesive, obtain ideal resistance to pressure and resist the thermal stress ability, because molecular structure's difference, metal material's coefficient of expansion is great with macromolecular material's coefficient of expansion difference, make compound pipe is moulded to the steel under ambient temperature's change, there is the tendency of shearing displacement at the composite bed interface, when adhesive force is greater than the effect of thermal stress, the steel is with moulding and just controls the composite system that does not function independently of a layering all the time, thereby have the advantage of steel pipe and mould the pipe concurrently.

In the embodiment of the utility model provides an in, 5 colloid filling materials of plug in injection moulding have high molecular polymer's characteristic. In the using process, the temperature of a cold water system is more than or equal to 60 ℃ and the temperature of a hot water system is less than or equal to 95 ℃ need to be distinguished.

The embodiment of the utility model provides an in, to the operating mode that can't rotate threaded connection, overcome prior art defect completely. Convenient, quick, economical, practical and safe. In addition, the method is also an effective first choice for the pipeline connection of the steel-plastic composite pipe with small space of the connection part. Even in the prior art, the A pipe end of the steel-plastic composite pipe can be well applied without obvious outward flanging 21.

Claims

1. The plastic-lined composite pipe quick-connection elbow comprises an outer elbow (3) and an inner elbow (4); it is characterized in that the inner lining of the outer elbow (3) is connected with the inner elbow (4); a cavity is arranged between the inner wall of the outer bent pipe (3) and the outer wall of the inner bent pipe (4); the outer wall of the outer bent pipe (3) is provided with a glue injection hole (31), the inner wall of the inner bent pipe (4) is provided with a pressure reduction exhaust hole (32), and the glue injection hole (31) and the pressure reduction exhaust hole (32) are communicated with a cavity between the outer bent pipe (3) and the inner bent pipe (4).

2. The plastic-lined composite pipe quick-connecting elbow as claimed in claim 1, wherein a support net (6) is arranged between the inner wall of the outer bend (3) and the outer wall of the inner bend (4).

3. The plastic-lined composite pipe quick-connecting elbow as claimed in claim 1, wherein the pressure-reducing vent hole (32) is of a tapered structure with a small outside and a large inside.

4. The plastic-lined composite pipe quick-connecting elbow as claimed in claim 1, wherein the inner edge of the port of the outer bend (3) and the outer edge of the port of the inner bend (4) are provided with inclined guide tapers.

5. The plastic-lined composite pipe quick-connecting elbow as claimed in claim 1, wherein the glue injection hole (31) is plugged with a glue injection nozzle (7).

6. The plastic-lined composite pipe quick-connect elbow as claimed in claim 2, wherein the support net (6) is of a helical structure.

7. The plastic-lined composite pipe quick-connect elbow as claimed in claim 2, wherein the support net (6) is of a resilient construction.

8. The plastic-lined composite pipe quick-connecting elbow as claimed in claim 5, characterized in that the outer wall of the glue injection nozzle (7) is provided with a circumferential ring-cut groove (71).