KR102325487B1 - Siege heater with double tube for improved durability - Google Patents

Abstract

The present invention is invented to improve an external pipe of a sheath heater with a double tube to improve durability to prevent damage to the external pipe even from an electric shock or external shock inside the sheath heater. In the configuration of the present invention, a magnesium oxide (MgO) powder 21 is filled inside the exterior pipe (20). A heating wire (22) is connected to the inside of the magnesium oxide powder (21). An insulator (30) is coupled to the end of an exterior pipe (20). A terminal (31) is exposed to the outside of the insulator (30). A terminal (31) is connected to a first cold pin (28). The first cold pin (28) and a second cold pin (23) are respectively connected to both ends of a thermal fuse (26). The second cold pin (23) and the thermal fuse (26) are fixed in a socket (25). A cap (24) is inserted and fixed between a packing (27) and the magnesium oxide powder (21). The socket (25) is integrally fixed inside the cap (24), an insulator (32) is filled inside the cap (24), and the insulator (29) is filled between the insulator (30) and the packing (27).

Description

Siege heater with double tube for improved durability}

The present invention relates to a sheath heater equipped with a double tube for improving durability, and more particularly, by improving the sheath heater's outer pipe with a double tube, it prevents damage to the outer pipe even from an electric shock or external shock inside the sheath heater to improve safety. It was invented to be reassured.

In general, a sheath heater embeds a heating wire in a metal protection tube in a coil shape, and fills and compresses it with magnesium oxide (MgO), which has high thermal conductivity and insulation, so that it is strong against external physical impact and has electrical thermal energy. It can be properly processed according to the use in various shapes while increasing the thermal efficiency of the product.

These sheath heaters have strong durability against vibration and shock, and have been widely used not only for industrial purposes such as electric furnaces, dryers, bathtubs, half baths, casting machines, ovens, foot warmers, etc., but also as heating heaters for heating products for the general public.

As a conventional sheath heater, referring to FIG. 1 , magnesium oxide (MgO) powder 3 is filled inside the outer pipe 1, and the second cold fin 4 is connected to the inside of the magnesium oxide powder 3 The heating wire 2 is continuously connected, the second cold pin 4 is connected through the stopper 5 to which the primary sealing material 6 is bonded, and the thermal fuse 7 is connected to the second cold pin 4 . ) is connected, the second cold pin 4 and the thermal fuse 7 are screwed into the socket 8, and a cap 9 for protecting the thermal fuse 7 from the primary sealing material 6 is built-in. The first cold pin 12 is connected to the thermal fuse 7 by a spring 13 , and the first cold pin 12 is fixed to the insulator 11 .

Then, the secondary sealing material 10 is filled between the primary sealing material 6 and the insulating insulator (11).

Such a structure of the conventional sheath heater is a structure manufactured through a rather complicated process such as connection of a thermal fuse and a spring or screw coupling of a socket.

However, in the prior art, the conventional sheath heater is difficult to fix the thermal fuse, along with cumbersome problems due to processing and assembling, increased processing cost and reduced productivity. There was a problem in that the sheath heater had a structure that was weak in airtight maintenance due to the penetration of moisture into it.

As a configuration for solving the above problems, as shown in FIG. 2 , magnesium oxide (MgO) powder 21 is filled inside the exterior pipe 20 , and the second cold fin 23 is inside the magnesium oxide powder 21 . ) is connected to the heating wire 22 is continuously connected, the insulator 30 is coupled to the end of the outer pipe 20, the terminal 31 is exposed to the outside of the insulator 30, and the terminal 31 is connected to the first cold pin 28 penetrating the packing 27 built into the outer pipe 20 and the insulating insulator 30 , and the first cold pin protruding through the packing 27 . 28 and the second cold pin 23 are respectively connected to both ends of the thermal fuse 26, the second cold pin 23 and the thermal fuse 26 are fixed in the socket 25, and the packing 27 ) and the magnesium oxide powder 21, the cap 24 is inserted and fixed, the socket 25 is integrally fixed inside the cap 24, and the insulator 32 is filled inside the cap 24, , a sheath heater structure in which an insulator 29 is filled between the insulator 30 and the packing 27 has been proposed and registered by the present applicant.

The sheath heater structure has been proposed to solve the risk of insulation breakdown and short circuit as an integral type of thermal fuse and socket type, but there is still a problem in that the outer pipe is ruptured due to electric shock and external shock.

Therefore, there was a problem that caused a risk to the safety of the heating heater for industrial and general use to which the sheath heater is applied, thereby hindering the competitiveness of the product.

Republic of Korea Patent Publication No. 10-1005619 Thermal fuse integrated sheath heater structure (Registration date: December 27, 2010)

In order to solve the problems of the prior art as described above, the present invention makes it possible to improve durability while securing thermal conductivity of a heating heater by double molding an outer pipe into an inner tube and an outer tube with different materials. There is this.

Another object of the present invention is to improve the production and processing assembly of the outer pipe having the configuration of the inner tube and the outer tube to improve the safety and marketability of the product.

According to the present invention for solving such a technical problem,

Magnesium oxide (MgO) powder 21 is filled inside the exterior pipe 20, and the heating wire 22 to which the second cold pin 23 is connected is continuously connected to the inside of the magnesium oxide powder 21, An insulating insulator 30 is coupled to an end of the external pipe 20 , a terminal 31 is exposed to the outside of the insulating insulator 30 , and the terminal 31 is a packing 27 built into the external pipe 20 . ) and the first cold pin 28 penetrating the insulating insulator 30 , and the first cold pin 28 and the second cold pin 23 protruding through the packing 27 are thermal fuses. (26) respectively connected to both ends, a second cold pin 23 and a thermal fuse 26 are fixed in the socket 25, and a cap 24 is formed between the packing 27 and the magnesium oxide powder 21 It is inserted and fixed, the socket 25 is integrally fixed inside the cap 24, an insulator 32 is filled inside the cap 24, and an insulator ( 29) in the filled sheath heater,

The outer pipe 20 is an inner tube 20a having any one or two or more metal materials selected from among stainless steel, copper, aluminum, iron, and magnesium, and an outer tube made of a non-metal material selected from plastic and ceramic ( 20b) is integrally formed to configure the insulating insulator 30 to be coupled to both ends.

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In addition, a groove 33 for limiting the insertion of the cap 24 is formed at the end of the inner tube 20a of the outer pipe 20, and the inner tube 20a of the outer pipe 20 is connected to the cap ( The grooves 33 limiting the insertion of 24) are formed at both ends, and the outer tube 20b is formed only between the grooves 33 and the grooves 33 provided at both ends of the inner tube 20a. .

And, the outer tube 20b of the outer pipe 20 is formed with an extension 20c that extends beyond the end of the inner tube 20a, and the insulation insulator 30 facing the outer pipe 20 is formed. An extension fitting protrusion 30a is formed on the inner surface of the extension portion 20c to be fitted and supported.

In addition, the outer tube 20b of the outer pipe 20 is formed with an extension 20c extending from the end of the inner tube 20a, and the insulator 30 facing the outer pipe 20 is formed. The inner surface is achieved by forming a concave-shaped extension fitting groove 30b into which the end of the extension portion 20c is fitted.

According to the present invention, since the outer pipe has a different material and is double molded into an inner tube and an outer tube, the durability is improved along with the thermal conductivity of the heating heater to prevent rupture of the sheath heater even from electric shocks and external shocks. can increase

In addition, the effect of improving the production and processing assembly by diversifying the combination configuration of the inner and outer tubes of the outer pipe, and securing the outer pipe of the outer pipe more stably to increase the commercial quality and safety of the product to have competitiveness there is also

1 is a cross-sectional view of a sheath heater structure according to the prior art.
Figure 2 is a cross-sectional view of the thermal fuse-integrated sheath heater structure according to the prior art.
Figure 3 is a cross-sectional view of a sheath heater equipped with a double tube for improving durability of the present invention.
Figure 4 is an embodiment of a sheath heater equipped with a double tube for improving durability of the present invention.
5A and 5B are enlarged cross-sectional views of the main part of the sheath heater according to the present invention.

In the sheath heater equipped with a double tube for improving durability, the present inventor improved the outer pipe of the sheath heater with a double tube to prevent damage to the outer pipe even from an electric shock or external impact inside the sheath heater to ensure safety. .

Hereinafter, the characteristics of the sheath heater having a double tube for improving durability according to the present invention will be understood by the embodiments described in detail with reference to the accompanying drawings.

Since the present invention can have various changes and can have various forms, embodiments will be described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

First, the sheath heater of the present invention is a sheath heater in which the thermal fuse 26 is integrally configured in the sheath heater's outer pipe 20, and processing or assembly is simple and sealing and insulation are excellent.

The outer pipe 20 is a cylindrical pipe, and an outer tube 20b having durability is integrally formed with an inner tube 20a having a thermally conductive metal material, and the inner tube 20a has thermal conductivity. It is molded with a metal material selected from any one or two or more of stainless steel, copper, aluminum, iron, and magnesium, and the outer tube 20b is a non-metal outer tube 20b selected from any one of plastics and ceramics. integrally molded

In addition, the outer pipe 20 can be freely bent or bent according to the range to which the sheath heater is applied, and the inner tube 20a has a coil-shaped heating wire 22 continuously arranged therein. .

And, the inside of the inner tube 20a is filled with magnesium oxide (MgO, magnesia, 96% or more high purity) powder 21, which is an insulating material, and the magnesium oxide powder 21 has excellent thermal conductivity and high heat resistance. It is an insulating material.

In addition, the heating wire 22 converts the electrical energy applied through the second cold fin 23 into thermal energy, and ceramic insulators ( 30 is fixedly coupled, a first cold pin 28 is coupled through the insulating insulator 30, a terminal 31 is coupled to the first cold pin 28, and the terminal 31 is exposed and connected to the power supply.

In addition, an insulator 29 such as epoxy is filled between the first cold pin 28 and the insulating insulator 30 of the inner tube 20a, and a silicone material is applied to the packing 27, and the first cold One end of the pin 28 is connected to the thermal fuse 26 through the terminal 31 exposed to the outside of the outer pipe 20 and the built-in packing 27 .

As described above, the sheath heater has a coil-shaped heating wire 22 built into the outer pipe 20 having different materials as the basis of the electric heater, and is filled with magnesium oxide, which is heat transfer powder, so that it can withstand external physical shocks. It is a heater that is sturdy and can be bent and processed to fit the user's use, shape and shape in various shapes while increasing the efficiency of electric thermal energy.

In addition, the first cold pin 28 and the second cold pin 23 are connected to both ends of the thermal fuse 26 of the sheath heater to make an electrical connection, and the thermal fuse 26 has an operating range of 120 to 250 ° C. However, those that may vary depending on the subject of application are also included in the present invention.

One side of the thermal fuse 26 and the second cold pin 23 is fixedly connected to a cylindrical socket 25 made of copper, and one side of the socket 25 is fixed to the cap 24 .

The cap 24 has a cylindrical shape and a polycarbonate (PC) material is applied, and a second cold pin 23 is fixedly coupled to the inside of the socket 25 through the cap 24 .

In addition, the cap 24 is closely fixed up to the groove 33 formed on the outer periphery of the exterior pipe 20 , and the groove 33 limits the insertion of the cap 24 into the exterior pipe 20 . , the groove 33 is in the shape of a groove on the exterior of the exterior pipe 20, but protrudes inwardly.

Accordingly, the cap 24 to which the socket 25 in which the thermal fuse 26 is built is fixed is coupled up to the groove 33 to be separated and separated from the magnesium oxide powder 21 , and to the inside of the cap 24 . is filled with an insulator 32 such as epoxy.

In such a sheath heater, the heating wire 22 connected to the second cold pin 23 is disposed in the central portion of the inner tube 20a constituting the outer pipe 20 and the magnesium oxide powder 21 is filled. Both sides of the outer pipe 20 are sealed and insulated, and at this time, the cap 24 in which the socket 25 with the thermal fuse 26 is embedded is pushed to the groove 33 formed in the inner tube 20a and fixed. make it

In addition, the second cold pin 23 and the thermal fuse 26 are electrically connected. When the cap 24 is fixed, the insulator 32 is filled inside the cap 24 to achieve sealing and insulation, , is connected so that the first cold pin 28 is connected to the thermal fuse 26 .

And, after the cap 24 is inserted and fixed, the packing 27 is inserted and fixed, and the packing 27 is filled with the insulator 29 together with the connection of the first cold pin 28, and finally An insulating insulator 30 is fixedly coupled to an end of the outer pipe 20 , and a terminal 31 is connected to the first cold pin 28 on the outside of the insulating insulator 30 .

As described above, the sheath heater with a double tube has an outer pipe 20 of a different material than the conventional sheath heater structure and integrally formed to have an inner tube 20a and an outer tube 20b to have durability. By preventing the pipe 20 from being damaged, assembly is simple and safety can be improved.

In addition, the external pipe 20 with improved durability is provided so that the thermal fuse 26 is fixed to the socket 25, and the electrical coupling of the cold pins at both ends of the thermal fuse 26 is safely made, so that the external pipe is protected against an impact caused by electrical connection. (20) to prevent breakage and improve the reliability of the sheath heater.

In another embodiment of the present invention, as shown in Fig. 4, the exterior pipe 20 has grooves 33 that limit the insertion of the cap 24 to the inner tube 20a having a thermally conductive metal material are formed at both ends, The outer tube 20b is formed only between the grooves 33 and the grooves 33 provided at both ends of the inner tube 20a, and the end of the inner tube 20a is coupled to the insulating insulator 30. Included.

That is, by forming the outer tube 20b shorter than the inner tube 20a, the existing outer diameter pipe and the insulating insulator 30 can be combined, and the inner tube 20a with the heating wire 22 is provided. By making the outer pipe 20b have the configuration of the outer pipe 20 surrounding it, durability can be improved.

And, in another embodiment of the present invention as shown in Fig. 5a, the outer tube 20b of the outer pipe 20 is molded with an extension portion 20c that is longer than the end of the inner tube 20a, and the It is also possible to form an extended fitting protrusion 30a that is fitted and supported by the inner diameter of the extension 20c on the inner surface of the insulating insulator 30 facing the exterior pipe 20 .

Accordingly, the exterior pipe 20 is molded to have a concave shape by the inner tube 20a, and the exterior pipe 20 and the exterior pipe 20 and The insulator 30 is coupled.

In addition, as shown in FIG. 5b , the outer tube 20b of the outer pipe 20 allows an extension 20c that is longer than the end of the inner tube 20a to be molded, and faces the outer pipe 20 On the inner surface of the insulating insulator 30, an extended fitting groove 30b of a concave shape into which the end of the extension 20c is fitted is formed, so that the exterior pipe 20 and the insulator 30 can be more easily It is also possible to couple or insert the outer pipe 20 into the extended fitting groove 30b of the insulating insulator 30 .

As described above, the above-described embodiment has been described with respect to the most preferred example of the present invention, but is not limited to the above embodiment, and it is apparent to those skilled in the art that various modifications are possible within the scope without departing from the technical spirit of the present invention. .

20. Outer pipe 20a. inner tube
20b. outer tube 20c. extension
21. Magnesium Oxide Powder 22. Heating Wire
23. Second cold pin 24. Cap
25. Socket 26. Thermal Fuse
27. Packing 28. First cold pin
29. Insulator 30. Insulator
30a. Extended jaw 30b. extension fitting groove
31. Terminal 32. Insulator
33. Home

Claims (6)

Magnesium oxide (MgO) powder 21 is filled inside the exterior pipe 20, and the heating wire 22 to which the second cold pin 23 is connected is continuously connected to the inside of the magnesium oxide powder 21, An insulating insulator 30 is coupled to an end of the outer pipe 20 , a terminal 31 is exposed to the outside of the insulator 30 , and the terminal 31 is a packing built into the outer pipe 20 . The first cold pin 28 and the second cold pin 23 that are connected to the 27 and the first cold pin 28 penetrating the insulating insulator 30 and protrude through the packing 27 have a temperature A cap 24 is connected to both ends of the fuse 26 , and a second cold pin 23 and a thermal fuse 26 are fixed in the socket 25 , and between the packing 27 and the magnesium oxide powder 21 . This is inserted and fixed, the socket 25 is integrally fixed inside the cap 24 , the insulator 32 is filled inside the cap 24 , and the insulator is between the insulator 30 and the packing 27 . (29) In the filled sheath heater,
The outer pipe 20 is an inner tube 20a having any one or two or more metal materials selected from among stainless steel, copper, aluminum, iron, and magnesium, and an outer tube made of a non-metal material selected from plastic and ceramic ( 20b) is integrally formed and the insulation insulator 30 is configured to be coupled to both ends. A sheath heater with a double tube for improving durability.
delete The method of claim 1,
In the inner tube (20a) of the outer pipe (20), a sheath heater equipped with a double tube for improving durability, characterized in that the groove (33) for restricting the insertion of the cap (24) is formed at the end.
4. The method of claim 3,
The inner tube 20a of the outer pipe 20 has grooves 33 for limiting insertion of the cap 24 formed at both ends thereof, and the outer tube 20b has grooves provided at both ends of the inner tube 20a. A sheath heater with a double tube for improving durability, characterized in that it is formed only between the (33) and the groove (33).
The method of claim 1,
The outer tube 20b of the outer pipe 20 is formed with an extension 20c extending from the end of the inner tube 20a, and the inner surface of the insulating insulator 30 facing the outer pipe 20 Sheath heater with a double tube for improving durability, characterized in that the extended fitting jaw (30a) supported by being fitted to the inner diameter of the extension (20c) is formed.
The method of claim 1,
The outer tube 20b of the outer pipe 20 is formed with an extension 20c extending from the end of the inner tube 20a, and the inner surface of the insulating insulator 30 facing the outer pipe 20 Sheath heater with a double tube for improving durability, characterized in that the extended fitting groove (30b) of a concave shape into which the end of the extension portion (20c) is fitted is formed.

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