Anti-corrosion electric heating tube assembly with built-in hot melting section fuse

Abstract

An anti-corrosion electric heating tube assembly with a built-in hot melting section fuse comprises an electric heating tube and a heating resistance wire installed in the electric heating tube. A fusing assembly connected with the heating resistance wire is installed in the electric heating tube, and a lug plate connected with the fusing assembly is arranged at the end of the electric heating tube. A nano zirconium-infiltrated alloy coating for improving the corrosion resistance and high temperature resistance of the electric heating tube is formed on the outer surface of the electric heating tube; compared with the prior art, the electric heating tube has the advantages that the nano zirconium-permeating alloy coating is arranged on the outer surface of the electric heating tube, so that heating liquid is in contact with the nano zirconium-permeating alloy coating in the heating process of the electric heating tube, the electric heating tube is prevented from being in direct contact with the heating liquid, the corrosion resistance of the electric heating tube is improved, and the service life of the electric heating tube is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to heating pipe technical field, concretely relates to a kind of anticorrosion electric heating tube assembly of built-in hot melt section fuse. BACKGROUND

[0002] With the improvement of consumption level, consumers' demand for washing machine is no longer satisfied with basic washing function, in order to more effectively remove grease, sweat stains and other stubborn stains on clothes, and realize the effect of disinfection and sterilization, modern washing machine is generally equipped with heating function.

[0003] By heating washing water to produce hot water for washing, hot water plays a crucial role in the washing process, it not only can dissolve the material that is difficult to clean with cold water, but also can activate the enzyme in detergent, so as to enhance its decontamination ability, in addition, hot water can effectively kill bacteria and microorganisms in clothes, reduce allergens and pathogens, which is particularly important for families with children or pets, at the same time, hot water can also accelerate the dissolution rate of stain, shorten the washing cycle, save valuable time for consumers.

[0004] However, the heating pipe equipped in washing machine faces many challenges after long-term work, first, the mineral in water can form scale on the surface of heating pipe, which can isolate the direct contact between heating pipe and water, resulting in reduced heating efficiency.

[0005] In extreme cases, the accumulation of scale may even cause the heating pipe to overheat and dry out, which poses a serious safety hazard, secondly, chloride ions in water can damage the passivation film of electric heating pipe material, resulting in pitting and stress corrosion, which not only reduces the performance of heating pipe, but also may cause electric leakage accident.

[0006] In addition, the traditional electric heating pipe is easy to overheat during use due to long-term work or high external environment temperature, which not only damages the electric heating pipe, but also may cause fire and other serious consequences, at the same time, the surface of electric heating pipe is more susceptible to corrosion when working in harsh environment, thereby shortening the service life.

[0007] Chinese publication number CN101400194A discloses an internal double safety washing machine heating pipe and its processing method, which comprises a stainless steel pipe with resistance wire inside, the resistance wire is connected with internal lead, fuse, external lead, electrode terminal piece in turn, the electrode terminal piece is sealed with sealing glue and stainless steel pipe, and the resistance wire is fixed between two levels of stainless steel pipe through steel flange and connecting sleeve.

[0008] The above heating pipe does not protect the heating pipe itself, after a period of use, there is a hidden danger that scale is formed on the surface of heating pipe, which affects the heating efficiency of heating pipe, at the same time, there is also a hidden danger that corrosion and electric leakage of heating pipe affect the service life of heating pipe. Utility model content

[0009] The utility model discloses in order to overcome the defect in the prior art, provide a good anticorrosive performance, long service life, safe and reliable built-in hot melt section fuse's anticorrosive electric heating tube assembly.

[0010] In order to realize the utility model purposes, the utility model adopts following technical scheme: a built-in hot melt section fuse's anticorrosive electric heating tube assembly, including electric heating tube and install in the heating resistance wire of electric heating tube, the electric heating tube is installed with the fusing assembly that connects with heating resistance wire, and the electric heating tube end is equipped with the terminal lug that connects with fusing assembly, the electric heating tube outer surface forms with the nanometer zirconium infiltrated alloy coating for improving the corrosion resistance and high temperature performance of electric heating tube.

[0011] As a preferred scheme of the utility model, the electric heating tube outer surface is also covered with the zirconium nitride coating for improving the surface strength of electric heating tube.

[0012] As a preferred scheme of the utility model, the zirconium nitride coating covers the surface of nanometer zirconium infiltrated alloy coating.

[0013] As a preferred scheme of the utility model, the electric heating tube includes the pipe body that is hollowly arranged, and the heating resistance wire is arranged along the length direction of pipe body, and the fusing assembly is arranged at the pipe body end.

[0014] As a preferred scheme of the utility model, the fusing assembly includes the inner electrode, hot fusing type fuse and outer electrode that are connected, the inner electrode is connected with heating resistance wire, and the outer electrode is connected with terminal lug.

[0015] As a preferred scheme of the utility model, the pipe body is equipped with the insulating sheath for ensuring the electrical isolation between inner electrode, hot fusing type fuse and outer electrode, and the inner electrode and outer electrode are arranged through the insulating sheath.

[0016] As a preferred scheme of the utility model, the pipe body is filled with the insulating heat conducting layer for ensuring the stable setting of heating resistance wire and inner electrode.

[0017] As a preferred scheme of the utility model, the pipe mouth position of pipe body is equipped with the sealing glue for preventing water, and the pipe body end is installed with the insulating bead for improving the insulation performance of electric heating tube, and the outer electrode is connected with terminal lug through sealing glue and insulating bead.

[0018] As a preferred scheme of the utility model, the electric heating tube end is equipped with the bolt pressure plate assembly and flange for fixing electric heating tube, and the bolt pressure plate assembly is equipped with the threaded head that is arranged through flange, and the threaded head is installed with the nut for locking the installation position of flange.

[0019] As a preferred scheme of the utility model, the bolt pressing plate assembly and the flange are equipped with a sealing rubber pad for improving the sealing performance.

[0020] Compared with the prior art, the utility model has the advantages that: the nano zirconium alloy coating is arranged on the outer surface of the electric heating tube, so that the heating liquid contacts the nano zirconium alloy coating during the heating process of the electric heating tube, the electric heating tube is prevented from directly contacting the heating liquid, and the corrosion resistance and service life of the electric heating tube are improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the structural schematic view of the utility model;

[0022] Figure 2 is the structural schematic view of the heating tube;

[0023] Figure 3 is Figure 2 is the local method view of A in the figure

[0024] Fig. 1 is an electric heating tube, Fig. 2 is a bolt pressing plate assembly, Fig. 3 is a sealing rubber pad, Fig. 4 is a flange, Fig. 5 is a nut, Fig. 6 is a nano zirconium alloy coating, Fig. 7 is a zirconium nitride coating, Fig. 8 is an insulating bead, and Fig. 9 is a terminal lug. DETAILED DESCRIPTION

[0025] The utility model embodiment is described in detail below with reference to the drawings.

[0026] As Figures 1-3 shown, an anticorrosion electric heating tube assembly with a built-in hot-melt section fuse includes an electric heating tube 1 and a heating resistance wire 12 installed in the electric heating tube 1; a fuse assembly connected to the heating resistance wire 12 is installed in the electric heating tube 1, and the electric heating tube 1 is provided with a terminal lug 9 connected to the fuse assembly at the end; a nano zirconium alloy coating 6 for improving the corrosion resistance and high-temperature resistance of the electric heating tube 1 is formed on the outer surface of the electric heating tube 1.

[0027] The heating resistance wire 12 is installed in the electric heating tube 1, and the heating resistance wire 12 generates heat under the action of electricity, thereby heating the electric heating tube 1; the heating resistance wire 12 is connected to the terminal lug 9 through the fuse assembly, thereby realizing the communication between the heating resistance wire 12 and an external circuit and the electrification of the heating resistance wire 12.

[0028] When the heating resistance wire 12 or the electric heating tube 1 is disconnected, the fuse assembly can realize instant disconnection, thereby disconnecting the heating resistance wire 12 from the external circuit and protecting the external circuit.

[0029] The nano-zirconium alloy coating 6 is formed on the outer surface of the electric heating tube 1, and under the action of the nano-zirconium alloy coating 6, the outer surface of the electric heating tube 1 contacts with the liquid to be heated during use of the electric heating tube 1.

[0030] The electric heating tube 1 is initially made of stainless steel, and the nano-zirconium alloy coating 6 comprises nano-zirconium for permeating the surface of the stainless steel, so that the nano-zirconium alloy coating 6 is formed on the surface of the electric heating tube 1, and the nano-zirconium alloy coating 6 is used to improve the corrosion resistance and high-temperature resistance of the electric heating tube, and to protect the inside of the electric heating tube 1 from corrosion by corrosive substances.

[0031] The outer surface of the electric heating tube 1 is further covered with a zirconium nitride coating 7 for improving the surface strength of the electric heating tube 1, the zirconium nitride coating 7 is covered on the surface of the nano-zirconium alloy coating 6, the zirconium nitride coating 7 is arranged on the surface of the nano-zirconium alloy coating 6 by smearing, and the zirconium nitride coating 7 is a hardening layer formed on the surface of the nano-zirconium alloy coating 6, so that the surface hardness and wear resistance of the electric heating tube are improved under the action of the zirconium nitride coating 7, thereby prolonging the service life of the electric heating tube 1.

[0032] The electric heating tube 1 comprises a hollow tube body 11, a heating resistance wire 12 is arranged along the length direction of the tube body 11, and a fuse assembly is arranged at the end of the tube body 11, the heating resistance wire 12 generates heat under the action of electricity, the generated heat can be dissipated outside through the tube body 11, and the fuse assembly arranged at the end of the tube body 11 can immediately disconnect the heating resistance wire 12 from the external circuit, thereby preventing the continuous electrification of the heating resistance wire 12.

[0033] The fuse assembly comprises an inner electrode 14, a thermal fuse type fuse 15 and an outer electrode 17 connected in series, the inner electrode 14 is connected with the heating resistance wire 12, the outer electrode 17 is connected with the tab 9, and the heating resistance wire 12 is connected with the external circuit through the inner electrode 14, the thermal fuse type fuse 15 and the outer electrode 17, when a large current passes through the thermal fuse type fuse 15, the thermal fuse type fuse 15 will be fused under its own action, thereby realizing the disconnection between the heating resistance wire 12 and the external circuit.

[0034] The tube body 11 is provided with an insulating sheath 16 for ensuring electrical isolation between the inner electrode 14, the thermal fuse type fuse 15 and the outer electrode 17, the inner electrode 14 and the outer electrode 17 pass through the insulating sheath 16, the insulating sheath 16 is sleeved on the thermal fuse type fuse 15, and the two ends of the insulating sheath 16 correspond to the connection positions of the inner electrode 14 and the thermal fuse type fuse 15 and the connection positions of the outer electrode 17 and the thermal fuse type fuse 15, respectively.

[0035] Under the action of the insulating sheath 16, the electrical isolation between the inner electrode 14, the thermal fuse type fuse 15 and the outer electrode 17 is realized, and the synchronous installation of the inner electrode 14, the thermal fuse type fuse 15 and the outer electrode 17 under the action of the insulating sheath 16 is also facilitated.

[0036] The pipe body 11 is filled with the insulating heat conducting layer 13 for ensuring the stable arrangement of the heating resistance wire 12 and the inner electrode 14, the insulating heat conducting layer 13 can be magnesia sand or magnesia powder, under the action of the insulating heat conducting layer 13, the filling of the gap in the pipe body 11 is realized, so that the stable arrangement of the inner electrode 14 and the heating resistance wire 12 in the pipe body 11 is realized, meanwhile, the insulating heat conducting layer 13 can also realize the effective conduction of the heat generated by the heating resistance wire 12 and prevent the electrical short circuit.

[0037] The pipe body 11 is filled with the insulating heat conducting layer 13 for ensuring the stable arrangement of the heating resistance wire 12 and the inner electrode 14, the insulating heat conducting layer 13 can be magnesia sand or magnesia powder, under the action of the insulating heat conducting layer 13, the filling of the gap in the pipe body 11 is realized, so that the stable arrangement of the inner electrode 14 and the heating resistance wire 12 in the pipe body 11 is realized, meanwhile, the insulating heat conducting layer 13 can also realize the effective conduction of the heat generated by the heating resistance wire 12 and prevent the electrical short circuit.

[0038] The sealing glue 18 is used for sealing the pipe opening position of the pipe body 11, so as to prevent the liquid from flowing into the pipe opening position of the pipe body 11 during the heating process of the circuit pipe 1.

[0039] The sealing rubber pad 3 between the bolt pressure plate assembly 2 and the flange 4 is used for improving the sealing performance.

[0040] The above description of disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application; therefore, the present application shall not be limited to the embodiments shown herein, but shall accord with the widest scope consistent with the principles and novel features disclosed herein.

[0041] Although the present application uses the following terms: electric heating tube 1, tube body 11, heating resistance wire 12, insulating heat-conducting layer 13, inner electrode 14, thermal fuse type fuse 15, insulating sheath 16, outer electrode 17, sealing rubber 18, bolt pressing plate assembly 2, threaded head 21, sealing rubber pad 3, flange 4, nut 5, nano zirconium alloy coating 6, zirconium nitride coating 7, insulating bead 8, lug 9, etc. in the drawings, the possibility of using other terms is not excluded. The use of these terms is only for the convenience of describing and explaining the essence of the present application; any additional limitation resulting from the interpretation of these terms is contrary to the spirit of the present application.

Claims

1. A corrosion-resistant electric heating tube assembly with a built-in hot-melt fuse, comprising an electric heating tube (1) and a heating resistance wire (12) installed inside the electric heating tube (1); characterized in that, The heating tube (1) is equipped with a fuse assembly connected to the heating resistance wire (12), and the end of the heating tube (1) is provided with a connecting piece (9) connected to the fuse assembly; the outer surface of the heating tube (1) is formed with a nano-zirconium-infiltrated alloy coating (6) for improving the corrosion resistance and high temperature resistance of the heating tube (1).

2. The corrosion-resistant electric heating tube assembly with a built-in hot-melt fuse according to claim 1, characterized in that, The outer surface of the heating element (1) is also covered with a zirconium nitride coating (7) to improve the surface strength of the heating element (1).

3. The corrosion-resistant electric heating tube assembly with a built-in hot-melt fuse according to claim 2, characterized in that, The zirconium nitride coating (7) covers the surface of the nano-zirconium-infiltrated alloy coating (6).

4. The corrosion-resistant electric heating tube assembly with a built-in hot-melt fuse according to claim 1, characterized in that, The electric heating tube (1) includes a hollow tube body (11), a heating resistance wire (12) arranged along the length of the tube body (11), and a fuse assembly arranged at the end of the tube body (11).

5. The corrosion-resistant electric heating tube assembly with a built-in hot-melt fuse according to claim 4, characterized in that, The fuse assembly includes an inner electrode (14), a thermal fuse (15), and an outer electrode (17). The inner electrode (14) is connected to a heating resistance wire (12), and the outer electrode (17) is connected to a terminal block (9).

6. The corrosion-resistant electric heating tube assembly with a built-in hot-melt fuse according to claim 5, characterized in that, The tube body (11) is provided with an insulating sleeve (16) to ensure electrical isolation between the inner electrode (14), the thermal fuse (15) and the outer electrode (17), with the inner electrode (14) and the outer electrode (17) passing through the insulating sleeve (16).

7. A corrosion-resistant electric heating tube assembly with a built-in hot-melt fuse according to claim 5, characterized in that, The tube (11) is filled with an insulating and heat-conducting layer (13) to ensure the stable placement of the heating resistance wire (12) and the inner electrode (14).

8. A corrosion-resistant electric heating tube assembly with a built-in hot-melt fuse according to claim 6, characterized in that, The tube body (11) has a sealant (18) for waterproofing at the tube opening, and an insulating bead (8) for improving the insulation performance of the heating tube (1) is installed at the end of the tube body (11). The external electrode (17) passes through the sealant (18) and the insulating bead (8) and is connected to the terminal block (9).

9. A corrosion-resistant electric heating tube assembly with a built-in hot-melt fuse according to claim 1, characterized in that, The end of the electric heating tube (1) is provided with a bolt pressure plate assembly (2) and a flange (4) for fixing the electric heating tube (1). The bolt pressure plate assembly (2) is provided with a threaded head (21) that passes through the flange (4). A nut (5) for locking the flange (4) installation position is installed on the threaded head (21).

10. A corrosion-resistant electric heating tube assembly with a built-in hot-melt fuse according to claim 9, characterized in that, A sealing rubber gasket (3) to improve sealing performance is provided between the bolt pressure plate assembly (2) and the flange (4).

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