CN204852742U

CN204852742U - Double slit hot melt board reinforced weld plastics elbow

Info

Publication number: CN204852742U
Application number: CN201520514058.8U
Authority: CN
Inventors: 齐克先
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-09-23
Filing date: 2015-09-23
Publication date: 2015-12-09
Anticipated expiration: 2025-09-23

Abstract

The utility model provides a double slit hot melt board reinforced weld plastics elbow, is formed by two plastics arc and sweat solderings of two electrothermal welding reinforcing plates of hot briquetting in advance, the electrothermal welding reinforcing plate ride pressing two arcs fold the seam and rather than fusing, when the same and symmetrical arrangement of two arc shapes, extrados and cambered surface that the welding seam lies in the elbow are respectively strengthened to its twice hot melt board, when two arc shapes not not simultaneously, welding seam symmetric position in well branchs of elbow is strengthened to its twice hot melt board. Double slit hot melt board reinforced weld plastics elbow compares with multisection butt welding type knee bend, has realized slick and sly bending, can use with various heavy -calibre plastic tubings are supporting, and the plastics that especially are used as prefabricated polyurethane foam heat preservation elbow protect the elbow outward, and welding strength is high, and is high -efficient convenient, and just can effectively eliminate the insulation layer thickness deviation has high practical value.

Description

A kind of double slit hot-melt plate strengthens welding plastic elbow

One, technical field:

The invention belongs to plastic pipe manufacture field.

Two, background technique:

At present, injection molding process can be adopted for small-bore plastic elbow, but for bigbore plastic elbow, particularly thin-walled/large-bore plastics elbow, prior art adopts welding procedure, is welded into dried shrimp waist structure.Such as, according to GB/T29047-2012 " high-density polyethylene external protective pipe RPUF prefabricated direct-buried thermal insulation pipe and pipe fitting " standard, when manufacturing heat insulation elbow, protecting elbow outside polyvinyl plastics used is all be welded into knee bend with vinyl tube, it is large to there is welding job amount in knee bend, manufacturing efficiency is low, the shortcoming that its polyurethane foam insulation layer thickness deviation of made heat insulation elbow is large.

Three, summary of the invention:

Not enough for solving prior art, the utility model provides a kind of double slit hot-melt plate to strengthen welding plastic elbow, it can support the use with various heavy-caliber plastic pipe, more has using value in particular for protecting elbow outside plastics that making " the prefabricated direct-buried heat insulation elbow of high-density polyethylene external protective pipe RPUF " is used.

Described double slit hot-melt plate strengthens welding plastic elbow, formed by two pieces of hot-forming in advance plastics arc plates and the melting welding of two electric heating melting stiffening plates, electric heating melting stiffening plate is ridden and be press against closing up seam and forming twice hot-melt plate reinforcement of weld with its fusion of two pieces of plastics arc plates.

Described double slit hot-melt plate strengthens welding plastic elbow, and when two pieces, plastics arc plate shape is identical and when being arranged symmetrically with, its twice hot-melt plate reinforcement of weld lays respectively at outer arced surface and the intrados of elbow.

Described double slit hot-melt plate strengthens welding plastic elbow, and when two pieces of plastics arc plate shapes are different, its twice hot-melt plate reinforcement of weld symmetry is positioned at the split of elbow.

Described double slit hot-melt plate strengthens welding plastic elbow, rides the electric heating melting stiffening plate that press against two pieces of arc plate butt joints, 0.5 times that is that width is greater than 40mm, thickness is greater than arc plate thickness, one side is with the plastic slat of one deck heating wire net.

four, accompanying drawing illustrates:

Below in conjunction with drawings and Examples, the present invention will be further described.

Fig. 1 is that described double slit hot-melt plate strengthens welding plastic elbow cross-section profile.

Fig. 2 is that twice hot-melt plate reinforcement of weld lays respectively at elbow outer arced surface and intrados schematic diagram.

Fig. 3 is the split structural representation that twice hot-melt plate reinforcement of weld symmetry is positioned at elbow.

Fig. 4 is electric heating melting stiffening plate sectional view.

Fig. 5 is that plastics arc plate and electric heating melting stiffening plate fuse the reinforcement of weld section amplification figure formed.

In figure: 1 is plastics arc plates; 2 is that plastics arc plate and electric heating melting plate fuse the hot-melt plate reinforcement of weld formed; 3 is plastic slats; 4 is metal electric heating silk screens.

Five, embodiment

(1), the implementation process of double slit hot-melt plate reinforcement welding plastic elbow described in the utility model is: (1) hot pressing bends plastics arc plate; (2) prefabricated electric heating melting stiffening plate; (3) at least with three snap rings corresponding with elbow specification, two pieces of plastics arc plates are closed up docking; (4) arc plate is closed up the portable plastic extrusion welder of seam, require that weld reinforcement is no more than mother metal; (5) ride and press against two pieces of plastics arc plates and close up seam and lay electric heating melting stiffening plate; (6) for electric heating, the plastic slat of electric heating melting stiffening plate and plastics arc plate are fused into and be integrally formed hot-melt plate reinforcement of weld; (7) after weld seam cooling, snap ring is removed, trimming elbow outward appearance and size.

(2), double slit hot-melt plate described in the utility model strengthens welding plastic elbow, when protecting elbow outside the plastics for making " the prefabricated direct-buried heat insulation elbow of high-density polyethylene external protective pipe RPUF ", because steel elbow is usually with straight length, if in advance arc plate is closed up welding by above-mentioned implementing process process to make plastic elbow, then steel elbow cannot penetrate, therefore following implementation process need be taked: (1) steel elbow eliminates rust and bundlees support block, and the thickness of support block is slightly less than thermal insulation layer theoretic throat; (2) by two pieces of plastics arc plate parcel steel elbows, arc plate port one 50mm ~ 200mm is exposed at steel elbow two ends; (3) at least with three snap rings corresponding with elbow specification or device of tying tight, two pieces of plastics arc plates are closed up; (4) two arc plates close up the portable plastic extrusion welder of seam, require that weld reinforcement is no more than mother metal; (5) ride and press against two pieces of plastics arc plates and close up seam and lay electric heating melting stiffening plate; (6) electrified regulation makes electric heating melting plate and plastics arc plate fuse, and forms double slit hot-melt plate and strengthens protecting elbow outside welding plastic; (7) treat that weld seam cools in the annular gap that to protect outside backward steel elbow and plastics between elbow and inject polyurethane; (8) after polyurethane foam solidification, remove snap ring, formed outside plastics and protect polyurethane foam insulation elbow.

Double slit hot-melt plate provided by the invention strengthens welding plastic elbow, and compared with knee bend, achieve round and smooth bending, weld strength is high, and weld seam total length is only 1/7 ~ 1/10 of knee bend weld seam, and manufacturing efficiency increases substantially.

Claims

1. a double slit hot-melt plate strengthens welding plastic elbow, be characterised in that: described double slit hot-melt plate strengthens welding plastic elbow, fused by two pieces of hot-forming in advance plastics arc plates and two electric heating melting stiffening plates and form, electric heating melting stiffening plate is ridden and be press against closing up seam and forming twice hot-melt plate reinforcement of weld with its fusion of two pieces of plastics arc plates.

2. double slit hot-melt plate strengthens welding plastic elbow according to claim 1, is further characterized in that: described two pieces of plastics arc plate shapes are identical and when being arranged symmetrically with, its twice hot-melt plate reinforcement of weld lays respectively at outer arced surface and the intrados of elbow.

3. double slit hot-melt plate strengthens welding plastic elbow according to claim 1, is further characterized in that: when described two pieces of plastics arc plate shapes are different, and its twice hot-melt plate reinforcement of weld symmetry is positioned at the split of elbow.

4. double slit hot-melt plate strengthens welding plastic elbow according to claim 1, be further characterized in that: described in ride the electric heating melting stiffening plate that press against two pieces of arc plates and close up seam, 0.5 times that is that width is greater than 40mm, thickness is greater than arc plate thickness, one side is with the plastic slat of one deck heating wire net.