阅读说明：本技术 一种改型的钢管加热器 (Modified steel pipe heater ) 是由 佘宏广 石杰毅 阮红星 范文甫 彭浩 徐陈华 张道胜 屈万清 于 2019-09-10 设计创作，主要内容包括：本发明提出的一种改型的钢管加热器,其中,发热线第一端引出部位与第一引出棒的第二端固定连接,第一引出棒的第一端与第一引出线固定连接,钢管第一端与发热线第一端引出部位相对应的对应处和第一引出棒之间设有第一绝缘密封层,第一绝缘密封层向远离钢管的方向延伸形成第一延伸部以使第一延伸部包覆第一引出线外表面,钢管第一端、第一绝缘密封层和第二引出线的表面设有第二绝缘密封层,第二绝缘密封层上与钢管第一端相对应的对应处外周开设有第一环形槽体,第一环形槽体内设有第一卡箍。本发明可有效避免钢管加热器引出线部位因密封不严受潮后绝缘降低的问题,有效延长了加热管使用寿命。(The invention provides a modified steel tube heater, wherein a leading-out part of a first end of a heating wire is fixedly connected with a second end of a first leading-out rod, a first end of the first leading-out rod is fixedly connected with a first leading-out wire, a first insulating sealing layer is arranged between a corresponding part of the first end of the steel tube, which corresponds to the leading-out part of the first end of the heating wire, and the first leading-out rod, the first insulating sealing layer extends towards a direction far away from the steel tube to form a first extending part so that the first extending part covers the outer surface of the first leading-out wire, a second insulating sealing layer is arranged on the surfaces of the first end of the steel tube, the first insulating sealing layer and the second leading-out wire, a first annular groove body is arranged on the periphery of the corresponding part, which corresponds to the first end. The invention can effectively avoid the problem of insulation reduction of the outgoing line part of the steel tube heater after being affected with damp due to untight sealing, and effectively prolongs the service life of the heating tube.)

1. The improved steel tube heater is characterized by comprising a steel tube (1), a heating wire (2), a first lead-out rod (3), a second lead-out rod, a first lead-out wire (7) and a second lead-out wire, wherein the heating wire (2) is arranged in the steel tube (1), and magnesium oxide powder is filled between the heating wire (2) and the steel tube (1);

A leading-out part of the first end of the heating wire (2) is fixedly connected with the second end of the first leading-out rod (3), the first end of the first leading-out rod (3) is fixedly connected with the first leading-out wire (7), a first insulating sealing layer (4) is arranged between the first end of the steel pipe (1) and the first leading-out rod (3) and a corresponding part of the first end of the heating wire (2) corresponding to the leading-out part, and the first insulating sealing layer (4) extends towards the direction far away from the steel pipe (1) to form a first extending part so that the first extending part covers the outer surface of the first leading-out wire (7);

a second insulating sealing layer (5) is arranged on the surfaces of the first end of the steel pipe (1), the first insulating sealing layer (4) and the second outgoing line, a first annular groove body is arranged on the periphery of the corresponding part of the second insulating sealing layer (5) corresponding to the first end of the steel pipe (1), and a first clamp (6) is arranged in the first annular groove body;

a leading-out part of the second end of the heating wire (2) is fixedly connected with the first end of a second leading-out rod, the second end of the second leading-out rod is fixedly connected with a second leading-out wire, a third insulating sealing layer is arranged between the corresponding part of the second end of the steel pipe (1) and the leading-out part of the second end of the heating wire (2) and the second leading-out rod, and the third insulating sealing layer extends towards the direction far away from the steel pipe (1) to form a second extending part so that the second extending part covers the outer surface of the second leading-out wire;

The surfaces of the second end of the steel pipe (1), the second insulating sealing layer (5) and the second outgoing line are provided with a fourth insulating sealing layer, a second annular groove body is formed in the periphery of the corresponding position, corresponding to the second end of the steel pipe (1), on the fourth insulating sealing layer, and a second clamp is arranged in the second annular groove body.

2. A modified steel tube (1) heater as claimed in claim 1, wherein the outer surface of the first end of the steel tube (1) is provided with one or more third annular grooves along the axial direction, one or more first annular protrusions are arranged at the positions of the inner periphery of the second insulating sealing layer (5) corresponding to the first annular grooves, and the first annular protrusions and the third annular grooves are in interference connection in a one-to-one correspondence manner;

One or more fourth annular grooves are axially formed in the outer surface of the second end of the steel pipe (1), one or more second annular bulges are arranged on the inner periphery of the fourth insulating sealing layer and correspond to the second annular grooves, and the second annular bulges are in interference connection with the fourth annular grooves in a one-to-one correspondence mode.

3. a modified steel tube (1) heater according to claim 1, wherein the outer surfaces of the first lead-out wire (7) and the second lead-out wire are coated with an insulating layer.

4. a modified steel tube (1) heater according to claim 3, wherein the first extension is sealed integrally with the insulation layer of the first lead-out wire (7), and the second extension is sealed integrally with the insulation layer of the second lead-out wire.

Technical Field

The invention relates to the technical field of heaters, in particular to a modified steel tube heater.

Background

Commercial refrigerators or freezers with large refrigerating capacity are usually defrosted by electric heaters. However, the leading-out wire of the electric heating tube is easily affected with moisture, which affects the service life of the electric heating tube or reduces the insulation of the electric heating tube to cause the power breaker to trip, thereby affecting the normal use of the refrigerator.

Disclosure of Invention

Based on the technical problems in the prior art, the improved steel tube heater provided by the invention can effectively avoid the problem of insulation reduction of the outgoing line part of the steel tube heater after being affected with damp due to poor sealing, and effectively prolongs the service life of the heating tube.

The invention provides a modified steel tube heater, which comprises a steel tube, a heating wire, a first lead-out rod, a second lead-out rod, a first lead-out wire and a second lead-out wire, wherein the heating wire is arranged in the steel tube, and magnesium oxide powder is filled between the heating wire and the steel tube;

a leading-out part of the first end of the heating wire is fixedly connected with the second end of the first leading-out rod, the first end of the first leading-out rod is fixedly connected with the first leading-out wire, a first insulating sealing layer is arranged between the first end of the steel pipe and the first leading-out rod and the corresponding part of the leading-out part of the first end of the heating wire, and the first insulating sealing layer extends towards the direction far away from the steel pipe to form a first extending part so that the first extending part covers the outer surface of the first leading-out wire;

a second insulating sealing layer is arranged on the surfaces of the first end of the steel pipe, the first insulating sealing layer and the second outgoing line, a first annular groove body is arranged on the periphery of a corresponding position, corresponding to the first end of the steel pipe, on the second insulating sealing layer, and a first clamp is arranged in the first annular groove body;

The leading-out part of the second end of the heating wire is fixedly connected with the first end of the second leading-out rod, the second end of the second leading-out rod is fixedly connected with the second leading-out wire, a third insulating sealing layer is arranged between the corresponding part of the second end of the steel pipe, which corresponds to the leading-out part of the second end of the heating wire, and the second leading-out rod, and the third insulating sealing layer extends towards the direction far away from the steel pipe to form a second extending part so that the second extending part covers the outer surface of the second leading-out wire;

The surfaces of the second end of the steel pipe, the second insulating sealing layer and the second outgoing line are provided with a fourth insulating sealing layer, a second annular groove body is arranged on the periphery of the corresponding position, corresponding to the second end of the steel pipe, on the fourth insulating sealing layer, and a second clamp is arranged in the second annular groove body.

preferably, one or more third annular groove bodies are axially arranged on the outer surface of the first end of the steel pipe, one or more first annular bulges are arranged on the inner periphery of the second insulating sealing layer corresponding to the first annular groove bodies, and the first annular bulges are in one-to-one interference connection with the third annular groove bodies;

one or more fourth annular groove bodies are axially arranged on the outer surface of the second end of the steel pipe, one or more second annular bulges are arranged on the inner periphery of the fourth insulating sealing layer and correspond to the second annular groove bodies, and the second annular bulges are in interference connection with the fourth annular groove bodies in one-to-one correspondence.

preferably, the outer surfaces of the first and second outgoing lines are coated with an insulating layer.

preferably, the first extension is sealed integrally with the insulating layer of the first lead-out wire, and the second extension is sealed integrally with the insulating layer of the second lead-out wire.

Compared with the prior art, the invention has the following beneficial effects:

(1) The first end of the steel pipe, the first leading-out rod and the first leading-out wire are sealed through the first insulating sealing layer and the second insulating sealing layer, the second end of the steel pipe, the second leading-out rod and the second leading-out wire are sealed through the third insulating sealing layer and the fourth insulating sealing layer, the problem that the leading-out wire of the steel pipe heater is not tightly damped due to sealing and then is reduced in insulation can be avoided, and the service life of the heating pipe is effectively prolonged.

(2) Strengthen the sealed effect of second insulating seal layer and steel pipe first end through first clamp, strengthen the sealed effect of fourth insulating seal layer and steel pipe second end through the second clamp.

Drawings

Fig. 1 is a schematic structural diagram of a modified steel tube heater provided by the invention.

Detailed Description

Referring to fig. 1, the modified steel tube heater provided by the invention comprises a steel tube 1, a heating wire 2, a first lead-out rod 3, a second lead-out rod, a first lead-out wire 7 and a second lead-out wire, wherein the heating wire 2 is arranged in the steel tube 1, and magnesium oxide powder is filled between the heating wire 2 and the steel tube 1;

A leading-out part of a first end of the heating wire 2 is fixedly connected with a second end of a first leading-out rod 3, a first end of the first leading-out rod 3 is fixedly connected with a first leading-out wire 7, a first insulating sealing layer 4 is arranged between a corresponding part of the first end of the steel pipe 1 corresponding to the leading-out part of the first end of the heating wire 2 and the first leading-out rod 3, and the first insulating sealing layer 4 extends towards a direction far away from the steel pipe 1 to form a first extending part so that the first extending part covers the outer surface of the first leading-out wire 7;

a second insulating sealing layer 5 is arranged on the surfaces of the first end of the steel pipe 1, the first insulating sealing layer 4 and the second outgoing line, a first annular groove body is arranged on the periphery of the corresponding position, corresponding to the first end of the steel pipe 1, of the second insulating sealing layer 5, and a first clamp 6 is arranged in the first annular groove body;

A leading-out part of the second end of the heating wire 2 is fixedly connected with the first end of a second leading-out rod, the second end of the second leading-out rod is fixedly connected with a second leading-out wire, a third insulating sealing layer is arranged between the corresponding part of the second end of the steel pipe 1 corresponding to the leading-out part of the second end of the heating wire 2 and the second leading-out rod, and the third insulating sealing layer extends towards the direction far away from the steel pipe 1 to form a second extending part so that the second extending part covers the outer surface of the second leading-out wire;

the surfaces of the second end of the steel pipe 1, the second insulating and sealing layer 5 and the second outgoing line are provided with a fourth insulating and sealing layer, a second annular groove body is formed in the periphery of the corresponding position, corresponding to the second end of the steel pipe 1, on the fourth insulating and sealing layer, and a second clamp is arranged in the second annular groove body.

According to the invention, the first end of the steel pipe 1, the first leading-out rod 3 and the first leading-out wire 7 are sealed through the first insulating sealing layer and the second insulating sealing layer, and the second end of the steel pipe 2, the second leading-out rod and the second leading-out wire are sealed through the third insulating sealing layer and the fourth insulating sealing layer, so that the problem of insulation reduction of the leading-out wire part of the steel pipe heater after being not tightly sealed and damped can be avoided, and the service life of the heating pipe is effectively prolonged. And the sealing effect of the second insulating and sealing layer 5 and the first end of the steel pipe 1 is enhanced through the first hoop 6, and the sealing effect of the fourth insulating and sealing layer and the second end of the steel pipe 1 is enhanced through the second hoop.

in the embodiment, one or more third annular grooves are axially formed in the outer surface of the first end of the steel pipe 1, one or more first annular protrusions are arranged on the inner periphery of the second insulating and sealing layer 5 at positions corresponding to the first annular grooves, and the first annular protrusions and the third annular grooves are in one-to-one interference connection to further enhance the insulating and sealing performance between the second insulating and sealing layer 5 and the steel pipe 1 and prevent the lead-out part of the steel pipe heater from being affected with damp;

The outer surface of the second end of the steel pipe 1 is provided with one or more fourth annular groove bodies along the axial direction, one or more second annular bulges are arranged on the inner periphery of the fourth insulating sealing layer corresponding to the second annular groove bodies, the second annular bulges are in one-to-one correspondence with the fourth annular groove bodies, and the second annular bulges are in interference connection with the corresponding fourth annular groove bodies to further enhance the insulating sealing performance between the fourth insulating sealing layer and the steel pipe 1, so that the lead-out part of the steel pipe heater is prevented from being affected with damp.

in the present embodiment, the outer surfaces of the first lead wire 7 and the second lead wire are each covered with an insulating layer to ensure the insulation of the first lead wire 7 and the second lead wire.

in the present embodiment, the first extension is sealed integrally with the insulating layer of the first lead wire 7 to ensure the insulating sealing property at the junction of the first lead bar 3 and the first lead wire 7, and the second extension is sealed integrally with the insulating layer of the second lead wire to ensure the insulating sealing property at the junction of the second lead bar and the second lead wire.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.