CN211352470U

CN211352470U - Electrothermal tube with built-in thermal fuse

Info

Publication number: CN211352470U
Application number: CN202020005835.7U
Authority: CN
Inventors: 董翔祺
Original assignee: Fuzhou Gaoke New Technology Development Co ltd
Current assignee: Fuzhou Gaoke New Technology Development Co ltd
Priority date: 2020-01-03
Filing date: 2020-01-03
Publication date: 2020-08-25
Anticipated expiration: 2030-01-03

Abstract

The utility model discloses an electrothermal tube with an internally embedded thermal fuse, which comprises a metal protective sleeve and resistance wires, wherein the resistance wires are arranged in the horizontal direction of the inner center of the metal protective sleeve, the resistance wires are provided with two groups, the thermal fuse is fixedly connected between the two groups of resistance wires, the two ends of the thermal fuse are respectively and fixedly connected with the ends of the two groups of resistance wires, one side of the ends of the two groups of resistance wires, which is far away from the thermal fuse, is fixedly provided with a leading-out bar, and the two sides of the metal protective sleeve are fixedly provided; the utility model arranges the thermal fuse between the resistance wires, when the power-on time is longer and the temperature is higher, the thermal fuse is disconnected, and the circuit is protected; through the high temperature resistant insulating cover of surface heating at the thermal fuse, the life of extension hot melt ware sets up the connecting piece at the both ends of resistance wire, when the thermal fuse disconnection, can change the thermal fuse alone, reduces the waste of resistance wire.

Description

Electrothermal tube with built-in thermal fuse

Technical Field

The utility model relates to a heating pipe correlation technique field specifically is an electrothermal tube of inside embedding thermal fuse.

Background

The electrothermal tube is an electrical element specially used for converting electric energy into heat energy. The metal armored electric heating element is characterized in that a metal tube is used as a shell (comprising stainless steel and copper tubes), spiral electric heating alloy wires (nickel-chromium and iron-chromium alloy) are uniformly distributed along the axial direction of the center in the metal tube, gaps of the spiral electric heating alloy wires are filled and compacted with magnesia sand with good insulation and heat conductivity, two ends of a tube opening are sealed by silica gel, and the metal armored electric heating element can heat air, metal molds and various liquids. The resistance wire in the existing electric heating tube is generally in a continuous spiral shape, and when the electric heating tube is electrified for a long time, the electric heating tube is easy to damage a circuit and influence the use. Therefore, the utility model provides an inside electrothermal tube that imbeds thermal fuse is used for solving above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an inside electrothermal tube that imbeds thermal fuse to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: an electrothermal tube with a thermal fuse embedded inside comprises a metal protective sleeve and resistance wires, wherein the resistance wires are arranged in the horizontal direction in the center of the interior of the metal protective sleeve, the resistance wires are arranged in two groups, the thermal fuse is fixedly connected between the two groups of resistance wires, and the two ends of the thermal fuse are respectively and fixedly connected with the tail ends of the two groups of resistance wires, the leading-out bars are fixedly arranged on the sides of the tail ends of the two groups of resistance wires far away from the thermal fuse, sealing materials are fixedly arranged on the two sides of the metal protective sleeve, and the left and right ends of the metal protective sleeve are fixedly provided with four groups of nuts at the outer side of the sealing material, each side is provided with two groups of nuts, a gasket is arranged between the two groups of nuts, the center of the outer end of each nut is fixedly connected with a wiring terminal in the horizontal direction, and the wiring end is fixedly connected with the lead-out bar, the wiring end is electrically connected with an external power supply, and the inner part of the metal protective sleeve is filled with a filling layer on the outer surface of the resistance wire.

Preferably, the two ends of the thermal fuse are fixedly connected with leads, the ends, close to the thermal fuse, of the outer surfaces of the two groups of resistance wires are fixedly provided with connecting pieces, and the leads are fixedly connected with the resistance wires through the connecting pieces.

Preferably, the connecting piece is arranged in a circular tube, internal threads are arranged on the inner wall of one side, close to the resistance wire, of the outer surface of the connecting piece, and the connecting piece is fixedly connected with the resistance wire through threads.

Preferably, two sets of clamping grooves are formed in one side, close to the lead, of the outer surface of the connecting piece, annular grooves are formed in the lower end, located at the clamping grooves, of the inner wall of the connecting piece, two sets of bulges corresponding to the clamping grooves are fixedly arranged on the outer surface of the lead, and the lead is fixedly connected with the connecting piece in a clamped mode.

Preferably, the outer surface of the thermal fuse is provided with a high temperature resistant insulating sleeve, the diameter of the high temperature resistant insulating sleeve is twice the diameter of the thermal fuse, the length of the high temperature resistant insulating sleeve is greater than that of the thermal fuse, and the two ends of the high temperature resistant insulating sleeve are located in the middle of the lead.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the thermal fuse is arranged between the resistance wires, and when the power-on time is long and the temperature is high, the thermal fuse is disconnected, so that the circuit is protected;

2. through the high temperature resistant insulating cover of surface heating at the thermal fuse, the life of extension hot melt ware sets up the connecting piece at the both ends of resistance wire, when the thermal fuse disconnection, can change the thermal fuse alone, reduces the waste of resistance wire.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of area A of FIG. 1;

FIG. 3 is a right side view of the connecting member of the present invention;

fig. 4 is a left side view of the connecting piece of the present invention.

In the figure: the structure comprises a metal protective sleeve 1, a resistance wire 2, a lead-out rod 3, a filling layer 4, a sealing material 5, a nut 6, a gasket 7, a wiring terminal 8, a thermal fuse 9, a high-temperature-resistant insulating sleeve 10, a lead wire 11 and a connecting piece 12.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 4, the present invention provides a technical solution: an electrothermal tube with a thermal fuse embedded inside is disclosed, as shown in figure 1, comprising a metal protective sleeve 1 and resistance wires 2, wherein the resistance wires 2 are arranged in the horizontal direction of the inner center of the metal protective sleeve 1, two groups of resistance wires 2 are arranged, the thermal fuse 9 is fixedly connected between the two groups of resistance wires 2, the two ends of the thermal fuse 9 are respectively fixedly connected with the tail ends of the two groups of resistance wires 2, one side of the tail ends of the two groups of resistance wires 2 away from the thermal fuse 9 is fixedly provided with a leading-out bar 3, the two sides of the metal protective sleeve 1 are fixedly provided with sealing materials 5, the left and right ends of the metal protective sleeve 1 are fixedly provided with four groups of nuts 6 at the outer side of the sealing materials 5, each side is provided with two groups of nuts 6, a gasket 7 is arranged between the two groups of nuts 6, the outer, the wiring end 8 is electrically connected with an external power supply, and the filling layer 4 is filled on the outer surface of the resistance wire 2 in the metal protection sleeve 1.

Further, both ends fixedly connected with lead wire 11 of thermal fuse 9, the equal fixed mounting in one end that the surface of two sets of resistance wire 2 is close to thermal fuse 9 has connecting piece 12, and lead wire 11 passes through connecting piece 12 and resistance wire 2 fixed connection, can dismantle between connecting piece 12 and the lead wire 11.

Furthermore, the connecting piece 12 is a circular tube, an internal thread is arranged on the inner wall of one side, close to the resistance wire 2, of the outer surface of the connecting piece 12, the connecting piece 12 is fixedly connected with the resistance wire 2 through the thread, and the connecting piece 12 and the resistance wire 2 can be detached.

Furthermore, two sets of clamping grooves are formed in one side, close to the lead 11, of the outer surface of the connecting piece 12, annular grooves are formed in the lower end, located at the clamping grooves, of the inner wall of the connecting piece 12, two sets of protrusions corresponding to the clamping grooves are fixedly arranged on the outer surface of the lead 11, the lead 11 is fixedly connected with the connecting piece 12 in a clamping mode, and the depth of each clamping groove is the same as that of each annular groove.

Further, the outer surface of the thermal fuse 9 is provided with a high temperature resistant insulating sheath 10, the diameter of the high temperature resistant insulating sheath 10 is twice the diameter of the thermal fuse 9, and the length of the high temperature resistant insulating sheath 10 is greater than that of the thermal fuse 9, both ends of the high temperature resistant insulating sheath 10 are located in the middle of the lead wire 11, and the connecting member 12 is a high temperature resistant conductor.

The working principle is as follows: one end of the two groups of resistance wires 2 is screwed with a connecting piece 12 and is clamped with the leads 11 at the two ends of the thermal fuse 9 through the connecting piece 12, the other end of the resistance wire 2 is connected with a leading-out rod 3 and is electrically connected with an external power supply through a terminal 8, the whole stroke is closed, when liquid or air needs to be heated, the power supply is switched on, the resistance wire 2 is switched on to generate heat, the filling layer 4 plays a role in insulating and conducting heat for magnesium oxide powder (or aluminum oxide), the heat is transferred to the metal protective sleeve 1 and is transferred to the outside, when the heating time reaches a certain temperature for a long time, the thermal fuse 9 is disconnected, the circuit is cut off, the effect of protecting the circuit is achieved, the power supply is turned off, the nut 6 and the sealing material 5 are disconnected, the resistance wire 2 and the thermal fuse 9 are taken out, and the thermal fuse 9 can be replaced independently due to the fact that the connecting piece 12 and the lead 11 are of a detachable structure, so that the cost is saved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an inside embedding thermal fuse's electrothermal tube, includes metal protecting cover (1) and resistance wire (2), the inside center horizontal direction of metal protecting cover (1) is provided with resistance wire (2), its characterized in that: the welding wire comprises resistance wires (2), wherein two groups of resistance wires (2) are fixedly connected with a thermal fuse (9), two ends of the thermal fuse (9) are respectively fixedly connected with the tail ends of the two groups of resistance wires (2), one side, far away from the thermal fuse (9), of the tail ends of the two groups of resistance wires (2) is fixedly provided with a leading-out rod (3), two sides of a metal protective sleeve (1) are fixedly provided with sealing materials (5), the left end and the right end of the metal protective sleeve (1) are positioned on the outer side of the sealing materials (5) and fixedly provided with four groups of nuts (6), each side is provided with two groups of nuts (6), a gasket (7) is arranged between the two groups of nuts (6), the outer end of each nut (6) is fixedly connected with a wiring end (8) in the horizontal direction, the wiring end (8) is fixedly connected with the leading-out rod, the inner part of the metal protective sleeve (1) is positioned on the outer surface of the resistance wire (2) and is filled with a filling layer (4).

2. An electrothermal tube having a thermal fuse embedded therein according to claim 1, wherein: both ends of the thermal fuse (9) are fixedly connected with leads (11), one end of the outer surface of the two groups of resistance wires (2) close to the thermal fuse (9) is fixedly provided with a connecting piece (12), and the leads (11) are fixedly connected with the resistance wires (2) through the connecting piece (12).

3. An electrothermal tube having a thermal fuse embedded therein according to claim 2, wherein: the connecting piece (12) is arranged in a circular tube, an internal thread is arranged on the inner wall of one side, close to the resistance wire (2), of the outer surface of the connecting piece (12), and the connecting piece (12) is fixedly connected with the resistance wire (2) through the thread.

4. An electrothermal tube having a thermal fuse embedded therein according to claim 2, wherein: two sets of draw-in grooves have been seted up to the surface of connecting piece (12) one side that is close to lead wire (11), and the inner wall of connecting piece (12) is located the lower extreme of draw-in groove and has seted up the ring channel, and the fixed surface of lead wire (11) installs two sets of archs that correspond with the draw-in groove, and lead wire (11) are fixed with connecting piece (12) joint.

5. An electrothermal tube having a thermal fuse embedded therein according to claim 1, wherein: the outer surface of the thermal fuse (9) is provided with a high-temperature-resistant insulating sleeve (10), the diameter of the high-temperature-resistant insulating sleeve (10) is twice the diameter of the thermal fuse (9), the length of the high-temperature-resistant insulating sleeve (10) is larger than that of the thermal fuse (9), and two ends of the high-temperature-resistant insulating sleeve (10) are located in the middle of the lead (11).