CN2763672Y

CN2763672Y - Electric smelting joint pipe piece

Info

Publication number: CN2763672Y
Application number: CN 200520001212
Authority: CN
Inventors: 孙兆儿
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-01-20
Filing date: 2005-01-20
Publication date: 2006-03-08
Anticipated expiration: 2015-01-20

Abstract

The utility model discloses a novel electric smelting connecting pipe piece which is a hollow element with an opening, which is made of thermoplastic material. The utility model comprises a main body of the connecting pipe piece, a resistance wire, a power supply interface and a binding post, wherein the resistance wire is buried in the surface of the inner wall of the main body of the connecting pipe piece, and is connected with the binding post; the power supply interface is arranged between the side surfaces on both ends of the connecting pipe piece, and the binding post is arranged in the power supply interface; the specific value of a length L of the smelting area of the connecting pipe piece and an inner diameter Dn of the connecting pipe piece is larger than 0.7. The novel electric smelting connecting pipe piece of the utility model has the advantages of regular, complete and beautiful appearance and good mechanical properties, such as good pressure resistance, good impact resistance, etc.

Description

A kind of new electrically heating melts connection pipe fitting

Technical field

The utility model relates to a kind of plastic union pipe spare, specifically, relates to a kind of molten connection pipe fitting of new electrically heating that the thermoplastic pipe is coupled together.

Background technique

It is that the hot melt butt joint connects that traditional plastic pipe connects the originating party formula, but this Placement is not suitable for the plastic pipe of bore less than 110mm; The quality that hot melt butt joint simultaneously connects is subjected to working environment and artificial factor bigger.

At present, advanced plastic pipe connects the molten connection pipe fitting of originating party formula employing electric heating.The molten connection pipe fitting of described electric heating by the thermoplastic body, be arranged on the wiring terminal on the body, the high value of resistance electric heating wire that is coiled on the inboard wall of tube body is made.In order to guarantee welding quality, the practice in the practical application is that electric heating wire is embedded within the inner wall surface of plastic union pipe spare.The plastics electric heating wire connection pipe fitting of being put down in writing among the model utility CN99205468.0 for example.When connection pipe fitting welded, a small amount of flowing took place because of fusing in thermoplastic, and at this moment the electric heating wire of fixed-site can not be subjected to displacement, thereby can avoid being short-circuited between the electric heating wire; In addition, when connection pipe fitting and pipeline were pegged graft, electric heating wire was because of the fixed-site difficult drop-off, thereby guaranteed welding quality and safety reliability.

But hot melt connection pipe fitting of the prior art, its power interface and wiring terminal generally all are arranged on the outer wall of body, adopt the vertical type with the connection pipe fitting axis normal.The defective of two aspects below this structure exists:

The one, the electric heating of this structure melts connection pipe fitting, regularity, integrity that its boundary dimension is big, destroyed connection pipe fitting outer wall shape, not only influence attractive in appearance, and especially be not suitable for situation about need reprocess the connection pipe fitting outer wall, thereby limited the using scope of the molten connection pipe fitting of electric heating.

The 2nd, existing electric heating melts connection pipe fitting, and its welding area is shorter, and the ratio of welding area length and connection pipe fitting internal diameter is less, so the mechanical property after connection pipe fitting and the tubing welding is relatively poor.When fields such as being used for combustion gas, feedwater, oil, chemical industry, mining, irrigation and drainage, sewage treatment needs the purposes of high mechanical properties, the pipeline that is connected by this connection pipe fitting is because voltage endurance capability and impact resistance are relatively poor, might break or rupture, therefore existing problems aspect safety reliability.

The model utility content

The purpose of this utility model is to overcome the defective that exists in the above-mentioned prior art, and provide a kind of and have mechanical propertys such as good resistance to pressure, impact resistance, and profile rule, the molten connection pipe fitting of new electrically heating complete, attractive in appearance.

The utility model is achieved in that

The molten connection pipe fitting of new electrically heating of the present utility model is the opening hollow component that thermoplastic material constitutes, comprise the connection pipe fitting body, power interface, wiring terminal, the resistance wire that be embedded within the connection pipe fitting inner body wall surface, links to each other with wiring terminal, it is characterized in that: power interface is arranged within the side, two ends of connection pipe fitting, and wiring terminal is arranged in the power interface; The ratio of the welding area length L of connection pipe fitting and connection pipe fitting inside diameter D n is greater than 0.7.The centre distance of weld length L=resistance wire * (number of turns of welding area internal resistance wire+1) wherein.Above said " centre distance of resistance wire " refer to the distance that is embedded in the helically wound adjacent two resistance wire centers of inner disc, connection pipe fitting body welding area.

Above-mentioned electric heating wire can be selected different metallic material for use as required for the exposed plain conductor or the plain conductor of coated insulation layer.Described electric heating wire can be arranged to one section, also can be arranged to separate two sections.

The molten connection pipe fitting of electric heating of the present utility model can comprise two logical type connection pipe fittings, three-way type connection pipe fitting, four-way type connection pipe fitting or plug type connection pipe fitting; The shape of its connecting tube can comprise straight tube or the swan neck of several angle is arranged.

But each connecting tube of above-mentioned connection pipe fitting can comprise same footpath, Different Diameter or reducing.

The utility model is because electric heating wire is embedded within the connection pipe fitting inner body wall surface, so fixed-site can not produce the danger that electric heating wire moves and the possibility of local superheating, and welding quality is good, good reliability.

As mentioned above, tenminal block of the present utility model comprises power interface and wiring terminal.Because power interface of the present utility model is arranged on the several end side surface of connection pipe fitting body and buried within the side, does not establish locating stud in the pipe fitting inner body wall.Wiring terminal places in the power interface, is connected with resistance wire.Therefore, place the structure of connection pipe fitting body outer wall to compare with common tenminal block, the molten connection pipe fitting boundary dimension of electric heating of the present utility model is little, outer wall regular shape, complete, there is not indicator hole on the utility model pipe fitting body outer wall in addition, be particularly suitable for to carry out the situation of various forms of reprocessing to outer wall, thereby enlarged the using scope of the molten connection pipe fitting of electric heating.

In the utility model, described welding area is meant that connection pipe fitting and tubing are heated and the zone of fusion weld by resistance wire.When electric melting pipe fittings is the straight tube of two logical types the or when swan neck of several angle was arranged, the welding area can become one or two according to the situation that is provided with of resistance wire.In the utility model, the welding area is meant that pipe fitting and tubing are heated and the zone of fusion weld by resistance wire.When being coiled into spiral helicine resistance wire and being arranged to one section, welding area as a whole (Fig. 1); In the times of be arranged to separate when resistance wire two sections, the welding area also becomes two (Fig. 2).When the welding area was arranged to two, the length L of two welding areas can be identical or different.The utility model is by being set at the length L of welding area and the ratio L/Dn of pipe fitting inside diameter D n greater than 0.7, can improve the mechanical strength such as resistance to pressure, impact resistance of pipe fitting.

The molten connection pipe fitting of new electrically heating of the present utility model can be applicable to the sweat soldering of thermoplastic plastic pipe, and the pipe-line system that obtains after the welding can be widely used in fields such as combustion gas, feedwater, oil, chemical industry, mining, irrigation and drainage, sewage treatment.

Description of drawings

Fig. 1 is a kind of structure of the present utility model (analysing and observe) figure

Fig. 2 is another kind of structure of the present utility model (analysing and observe) figure

Fig. 3 is the side view of Fig. 1

Fig. 4 is the side view of Fig. 2

Embodiment

Describe the utility model in detail below in conjunction with accompanying drawing

Fig. 1 is a kind of structure (analysing and observe) figure of special type electric melting pipe fittings of the present utility model, it is an opening hollow component that is made of thermoplastic material, comprise pipe fitting body 1, resistance wire 2, interface 3 and wiring terminal 4, resistance wire 2 is embedded within the pipe fitting inner body wall surface, link to each other with wiring terminal 4, interface 3 is arranged within the side, two ends of pipe fitting, and wiring terminal 4 places in the interface 3, resistance wire 2 is arranged to one section, so the welding area is whole one.The ratio of the length L of this welding area and pipe fitting inside diameter D n is greater than 0.7.

Fig. 2 is another kind of structure (analysing and observe) figure of special type electric melting pipe fittings of the present utility model, and resistance wire 2 is arranged to two sections of symmetry, so the welding area be two of symmetry, and the length L of two welding areas is equal, and with the ratio of pipe fitting inside diameter D n greater than 0.7.In addition, other structures are identical with Fig. 1.

Fig. 3 and Fig. 4 are respectively the side views of Fig. 1 and Fig. 2, and tenminal block comprises interface 3 and wiring terminal 4, and interface 3 is arranged on side, pipe fitting body two ends and buried within the side, and wiring terminal 4 places in the interface 3.The plastic pipe of needs welding is inserted in the pipe fitting from the two-port of pipe fitting respectively, connect power supply, make resistance wire 2 heating, the resin melted by heat of pipe fitting in the welding area and tubing junction surface, interruptive current behind the energising certain hour, the resin cooling curing of fusion, thus arrival is with the purpose of plastic pipe and the welding of tubing high quality.

Claims

1. a new electrically heating melts connection pipe fitting, the molten connection pipe fitting of this electric heating is the opening hollow component that thermoplastic material constitutes, comprise connection pipe fitting body (1), power interface (3), wiring terminal (4), be embedded in the resistance wire (2) that links to each other within connection pipe fitting body (1) inner wall surface, with wiring terminal (4), it is characterized in that:

Power interface (3) is arranged within the side, two ends of connection pipe fitting (1), and wiring terminal (4) is arranged in the power interface (3); The ratio of the welding area length L of connection pipe fitting and connection pipe fitting inside diameter D n is greater than 0.7.

2. new electrically heating melts connection pipe fitting according to claim 1, it is characterized in that, described electric heating wire (2) is the exposed plain conductor or the plain conductor of coated insulation layer.

3. as the molten connection pipe fitting of new electrically heating as described in the claim 2, it is characterized in that described electric heating wire (2) is arranged to one section.

4. as the molten connection pipe fitting of new electrically heating as described in the claim 2, it is characterized in that two sections of being arranged to separate of described electric heating wire (2).

5. new electrically heating melts connection pipe fitting according to claim 1, it is characterized in that, the molten connection pipe fitting of described electric heating is straight tube or the swan neck that several angle is arranged.

6. new electrically heating melts connection pipe fitting according to claim 1, it is characterized in that, the molten connection pipe fitting of described electric heating is two logical type connection pipe fittings, three-way type connection pipe fitting, four-way type connection pipe fitting or plug type connection pipe fitting.

7. as the molten connection pipe fitting of the described new electrically heating of one of claim 1-6, it is characterized in that, but the molten connection pipe fitting of described electric heating is same footpath, Different Diameter or reducing.