Heating pipe with good sealing performance

Abstract

The heating pipe with the good sealing performance comprises a steel pipe, an electric heating wire is arranged in the steel pipe, a plugging seat is embedded in the end of the steel pipe, the end of the electric heating wire penetrates through a through hole preset in the middle of the plugging seat, and the end of the steel pipe is sleeved with a connecting sleeve and a mounting sleeve; a first brazing ring is arranged between the lower end of the connecting sleeve and the steel pipe, and a second brazing ring is arranged between the mounting sleeve and the connecting sleeve. Through the first brazing ring, the second brazing ring, the tin block, the plugging seat and the like, the sealing of the end part of the steel pipe is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric heating tube, in particular to a heating tube with good sealing performance. BACKGROUND

[0002] Electric heating tube is a tubular electric heating element which is composed of metal tube, spiral resistance wire and crystalline magnesium oxide powder, etc. The electric heating tube product is generally made of high-quality stainless steel tube, high-temperature magnesium oxide powder and high-quality electric heating wire as the heating element, and other structural parts made of stainless steel, which has excellent overall performance, super-long service life and easy maintenance.

[0003] The end of the existing electric heating tube is mostly filled with glue or directly matched with ceramic parts, which has limited sealing performance, or the sealing is easy to fail at high temperature. SUMMARY

[0004] To solve the above problems, the present application discloses a heating tube with good sealing performance, which comprises a steel pipe, the inside of the steel pipe is provided with an electric heating wire, the end of the steel pipe is embedded with a plugging seat, and the end of the electric heating wire passes through the through hole preset in the middle of the plugging seat. The electric heating wire generates heat when electrified.

[0005] The end of the steel pipe is sleeved with a connecting sleeve and a mounting sleeve, a first brazing ring is arranged between the lower end of the connecting sleeve and the steel pipe, and a second brazing ring is arranged between the mounting sleeve and the connecting sleeve. The first brazing ring and the second brazing ring not only realize the fixed connection of each component, but also realize the sealing of the steel pipe, without the need to use sealing members made of rubber and other materials, and the brazing is more stable, without worrying about the problems of temperature resistance and aging.

[0006] Preferably, the inside of the mounting sleeve is provided with a mounting seat, a copper column is inserted in the middle of the mounting seat, and the lower end of the copper column extends into the plugging seat. That is, the copper column and the electric heating wire are in contact and conduct electricity, realizing the electrical connection with the external power supply.

[0007] Preferably, the lower end of the copper column is provided with a tin block, and the tin block is hot-melted, realizing the fixed connection between the copper column and the electric heating wire. During assembly, the copper column is heated to make the tin block melt, ensuring the electrical stability between the electric heating wire and the copper column.

[0008] Preferably, the inside of the steel pipe is filled with magnesium oxide. Magnesium oxide is a common filler in the production of electric heating tubes.

[0009] The beneficial effects of the present application are as follows: the sealing seat is arranged, the sealing of the end of the steel pipe is realized, the electrically heated wire and the copper column are electrically connected through the hot melt tin block, the through hole in the sealing seat is not only blocked, but also the stability of the connection between the electrically heated wire and the copper column is improved, and in addition, the steel pipe, the connecting sleeve and the mounting sleeve are provided with the first brazing ring and the second brazing ring, the sealing of the steel pipe is further improved, and the fixed connection of the parts is realized. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 is a perspective view of the present application;

[0011] Fig. 2 is an end explosion schematic view of the present application;

[0012] Fig. 3 is an end sectional view schematic view of the present application.

[0013] LIST OF REFERENCE NUMBERS:

[0014] 1, steel pipe; 2, connecting sleeve; 3, mounting sleeve; 4, sealing seat; 5, tin block; 6, mounting seat; 7, copper column; 8, first brazing ring; 9, electrically heated wire; 10, second brazing ring. DETAILED DESCRIPTION

[0015] The present application will be further illustrated below in conjunction with the drawings and specific embodiments, and it should be understood that the following specific embodiments are only used to illustrate the present application and are not used to limit the scope of the present application. It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "in" and "out" refer to the directions towards or away from the geometric center of a particular component.

[0016] As shown in Figs. 1 to 3 , a heating pipe with good sealing performance includes a steel pipe 1, which is a stainless steel seamless type. The inside of the steel pipe 1 is provided with an electrically heated wire 9, which generates heat when electrified. The end of the steel pipe 1 is embedded with a sealing seat 4. The sealing seat 4 and the steel pipe 1 are connected in an interference fit. The side wall of the sealing seat 4 is coated with sealant. The end of the electrically heated wire 9 passes through a pre-set through hole in the middle of the sealing seat 4, which facilitates the electrical connection between the electrically heated wire 9 and the external power source.

[0017] The end of the steel pipe 1 is sleeved with a connecting sleeve 2 and a mounting sleeve 3. The side wall of the connecting sleeve 2 is provided with threads, which facilitates the fixed connection of the connecting sleeve 2 to a support member through a nut. The lower end of the connecting sleeve 2 and the steel pipe 1 are provided with a first brazing ring 8. The mounting sleeve 3 and the connecting sleeve 2 are provided with a second brazing ring 10. The first brazing ring 8 and the second brazing ring 10 are both brazing materials left through brazing. The brazing ensures the sealing of the end of the steel pipe 1.

[0018] The first soldering ring 8 is used to connect the connecting sleeve 2 and the steel pipe 1, and the second soldering ring 10 is used to fixedly connect the connecting sleeve 2 and the mounting sleeve 3.

[0019] The mounting sleeve 3 is internally provided with a mounting seat 6 made of ceramic material and used to support insulation, and a copper column 7 is inserted in the middle of the mounting seat 6, and the upper sidewall of the copper column 7 is provided with threads, which is beneficial to the external cable sleeve to be fixed on the copper column 7, and ensures stable power supply, and the lower end of the copper column 7 extends into the plugging seat 4, that is, the lower end of the copper column 7 is in contact with the electric heating wire 9 to supply power.

[0020] The lower end of the copper column 7 is provided with a tin block 5, and the tin block 5 is hot-melted to realize the fixed connection between the copper column 7 and the electric heating wire 9, in the assembling process, the mounting sleeve 3, the mounting seat 6 and the copper column 7 are integrated into an integral structure, which is sleeved on the end of the steel pipe 1, and a pre-tightening force is set, then the copper column 7 is heated, the tin block 5 is melted through the heat transfer of the copper column 7, the electric connection between the electric heating wire 9 and the copper column 7 is stable, and finally the soldering is carried out to obtain the second soldering ring 10.

[0021] The inside of the steel pipe 1 is filled with magnesium oxide, which is a common material in the production of electric heating pipes, and the use of the plugging seat 4 can not only seal the end of the steel pipe 1, but also avoid the spilling of magnesium oxide in the subsequent production.

[0022] The technical means disclosed in the scheme of the present application is not limited to the technical means disclosed in the above-mentioned embodiments, and also includes the technical scheme composed of any combination of the above technical features.

Claims

1. A heat pipe having a good sealing property, characterized by comprising: The utility model relates to a steel pipe (1) is internally provided with electric heating wire (9), the end of steel pipe (1) is embedded and is provided with the blocking seat (4), and the end of electric heating wire (9) passes through the through -hole of the middle part of blocking seat (4) from the preset hole, The end of steel pipe (1) is sleeved with connecting sleeve (2) and mounting sleeve (3), the lower end between connecting sleeve (2) and steel pipe (1) is provided with first brazing ring (8), and the second brazing ring (10) is arranged between mounting sleeve (3) and connecting sleeve (2).

2. The hermetically sealed heating tube according to claim 1, wherein: The inside of mounting sleeve (3) is provided with mounting seat (6), the middle part of mounting seat (6) is inserted and is provided with copper column (7), and the lower end of copper column (7) extends into blocking seat (4).

3. A heat pipe with good sealing according to claim 2, characterized in that: The lower end of copper column (7) is provided with tin block (5), and tin block (5) is hot melting, realizes the fixed connection between copper column (7) and electric heating wire (9).

4. The hermetically sealed heating tube of claim 1, wherein: The inside of steel pipe (1) is filled and is provided with magnesium oxide.

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