CN209960077U

CN209960077U - Electric melting pipe fitting

Info

Publication number: CN209960077U
Application number: CN201920789807.6U
Authority: CN
Inventors: 童增耀
Original assignee: Ningbo Lianda Plastic Pipe Co Ltd
Current assignee: Ningbo Lianda Plastic Pipe Co Ltd
Priority date: 2019-05-29
Filing date: 2019-05-29
Publication date: 2020-01-17
Anticipated expiration: 2029-05-29

Abstract

The utility model discloses an electric smelting pipe fitting, including a hollow pipe fitting main part, both ends in the pipe wall outside of pipe fitting main part respectively are equipped with one and have the observation post and observe the hole, one side that is located the observation post is provided with and has fenestrate electrode sheath, it is equipped with the electrode post to interpolate in the perforation, the resistance wire has been coiled in pipe fitting main part inboard, two of resistance wire draw forth the end through perforate and with the electrode column connection, observe the post including the base that enlarges and the cylinder of being connected with the base, observe the hole including the tip that narrows down, the afterbody and the transition portion of connecting tip and afterbody of enlarging, transition portion can make the base of observing the post blocked.

Description

Electric melting pipe fitting

Technical Field

The utility model relates to an electric smelting pipe fitting.

Background

After more than ten years of practice and development, the welding construction technology of domestic plastic pipelines is mature day by day, in the plastic pipeline connection method, the electric hot melt connection is one of important connection modes, and the electric hot wire electric hot melt pipe fittings are mainly used for realizing the connection between the pipelines. The electric melting pipe fitting is made of a polyethylene pipe body, a binding post arranged on the pipe body and a high-resistance electric heating wire coiled on the inner wall of the pipe body, the electric heating wire is a bare wire and is arranged in a wiring groove on the inner wall of the pipe body through a wiring machine, and a melting protective layer is injected on the inner wall of the pipe body corresponding to a wire part. When the electric melting pipe fitting with the structure is welded, the short circuit of the lead is easily caused due to different distances between the electric heating wires and different depths in the pipe wall, and meanwhile, the pipe fitting and the pipe fitting are not uniformly heated, so that the welding quality cannot be guaranteed.

Based on the above problems, the invention patent with the patent application number of "cn201811110364. x" and the name of "a rear wire-laying type electric melting pipe" discloses an electric melting pipe, which comprises a hollow pipe main body, wherein two ends of the outer side of the pipe wall of the pipe main body are respectively provided with an observation hole, the observation holes are arranged on the inner side of an electrode sheath, and an observation column is arranged in each observation hole. The condition of electric heat fusion welding process resin melting inflation can directly be observed through the observation hole on the electric smelting body outer wall, and is concrete, and the electric smelting pipe fitting is in welding process, and the interior material of observation hole that sets up on the outer wall of electric smelting body can slowly jack-up, stops until the welding is accomplished after, and the material of the jack-up on observation hole surface helps carrying out the auxiliary identification to the welding butt fusion condition with the method of range finding, and is very convenient effective.

However, in the above structure, under some circumstances, the material in the observation hole is easily ejected to be separated from the observation hole, thereby forming a phenomenon of "material turnover", and the material ejected to the outside of the observation hole easily affects the aesthetic property of the whole electrofusion pipe fitting.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a to the not enough of existence among the prior art, provide an electric smelting pipe fitting.

The utility model discloses a realize through following technical scheme: the utility model provides an electric smelting pipe fitting, includes a hollow pipe fitting main part, respectively is equipped with an observation hole at the both ends in the pipe wall outside of pipe fitting main part be provided with the observation post on the diapire of observation hole, be located one side of observation post is provided with the electrode sheath, is provided with in the electrode sheath and link up the perforation of pipe fitting main part it is equipped with the electrode column to perforate the interpolation, has coiled the resistance wire in pipe fitting main part inboard, and two of resistance wire are drawn forth the end and are passed through the perforation and with the electrode column is connected, the observation post is including base that enlarges and the cylinder of being connected with the base, the observation hole includes the tip of narrow contraction, the afterbody of expansion and the transition portion of connecting end portion and afterbody, transition portion can make the base of observation post is.

In the technical scheme, a circle of flange is arranged on the electrode column, a copper gasket is compressed between the flange and the bottom of the electrode sheath, and the leading-out end of the resistance wire is compressed between the copper gasket and the flange.

In the technical scheme, the bottom end of the electrode column is provided with the anti-disengaging hook.

The utility model discloses following beneficial effect has: the utility model discloses the stirring phenomenon in the observation hole has been avoided.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic sectional view of the present invention.

Fig. 3 is a partially enlarged view of a portion a in fig. 2.

Detailed Description

The invention will be described in further detail with reference to the following detailed description and accompanying drawings: referring to fig. 1 to 3, an electric melting pipe fitting comprises a hollow pipe fitting main body 1, two ends of the outer side of the pipe wall of the pipe fitting main body 1 are respectively provided with an observation hole 2, an observation column 3 is arranged on the bottom wall of the observation hole 2, an electrode sheath 4 is arranged on one side of the observation column 3, and a through hole penetrating through the pipe fitting main body 1 is arranged in the electrode sheath 4. The observation post 3 comprises an enlarged base 30 and a column 31 connected with the base 30, the observation hole 2 comprises a narrowed end part 20, an enlarged tail part 21 and a transition part 22 connecting the end part 20 and the tail part 21, and the transition part 22 can block the base 30 of the observation post 3; therefore, when the materials in the observation column expand by heating to the extent that the base 30 is blocked by the transition part 22, the materials cannot turn outwards continuously towards the observation hole, so that the quantity of the hot materials flowing out of the observation hole is further controlled, the cavity pressure in the electric smelting pipe is increased, and finally the welding quality of the electric smelting pipe is improved.

A circle of flange 50 is arranged on the electrode column 5, and a copper gasket 6 is compressed between the flange 50 and the bottom of the electrode sheath 4. A resistance wire (not shown in the figures) is coiled on the inner side of the pipe fitting main body 1, and two leading-out ends of the resistance wire pass through the through holes and are connected with the electrode column 5. And the leading-out end of the resistance wire is pressed between the copper gasket and the flange. Due to the arrangement of the copper gasket, the resistance wire is not buried into the pipe fitting main body when heating.

The bottom end of the electrode column 5 is provided with a slip-off preventing hook 51 for preventing the electrode column from slipping out of the through hole.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The foregoing embodiments and description of the invention have been provided in the present application for the purpose of illustrating the principles of the invention and is subject to various changes and modifications without departing from the spirit and scope of the invention. All such variations and modifications are intended to be within the scope of the claimed invention.

Claims

1. The utility model provides an electric smelting pipe fitting, includes a hollow pipe fitting main part (1), respectively is equipped with one at the both ends in the pipe wall outside of pipe fitting main part (1) and observes hole (2) be provided with on the diapire of observing hole (2) and observe post (3), be located one side of observing post (3) is provided with electrode sheath (4), is provided with in electrode sheath (4) and link up the perforation of pipe fitting main part (1) the perforation interpolation is equipped with electrode column (5), has coiled the resistance wire in pipe fitting main part (1) inboard, and two of resistance wire are drawn forth the end and are passed through the perforation just with electrode column (5) are connected, its characterized in that: the observation column (3) comprises an enlarged base (30) and a column body (31) connected with the base (30), the observation hole (2) comprises a narrowed end part (20), an enlarged tail part (21) and a transition part (22) connecting the end part (20) and the tail part (21), and the transition part (22) can enable the base (30) of the observation column (3) to be blocked.

2. An electrofusion pipe fitting as recited in claim 1, wherein: a circle of flange (50) is arranged on the electrode column (5), a copper gasket (6) is compressed between the flange (50) and the bottom of the electrode sheath (4), and the leading-out end of the resistance wire is compressed between the copper gasket and the flange.

3. An electrofusion pipe fitting as recited in claim 2, wherein: an anti-disengaging hook (51) is arranged at the bottom end of the electrode column (5).