CN210725360U - Flexible heater - Google Patents

Abstract

The utility model discloses a flexible heater, which comprises a first spiral heating element and a second spiral heating element which are axially connected; at least one end of the first spiral heating element extends to form a first leading-out end, and at least one end of the second spiral heating element extends to form a second leading-out end; the second leading-out end penetrates through the inner ring of the first spiral heating element along the axial direction of the first spiral heating element and is parallel to the first leading-out end at intervals. The utility model discloses a flexible heater wholly is the heliciform, and flexible or compressive deformation change holistic length to be applicable to narrow and small maintenance space, operations such as easy to assemble, maintenance and change.

Description

Flexible heater

Technical Field

The utility model relates to a heater technical field especially relates to a flexible heater.

Background

The electric heater is widely used in industrial industry, and its element structure generally uses metal tube as shell, alloy heating wire as heating body, and has leading-out bar at one end or two ends, and in the metal tube the electric insulating medium with good heat conductivity is tightly filled for fixing heating body. In order to meet the requirement of higher power, the external dimension of the heating element is larger correspondingly. However, the heater is already installed in the container equipment as an accessory of the container equipment when the container equipment is delivered from a factory, and manufacturers often neglect the problem of maintenance space of the equipment. According to experience feedback of a plurality of nuclear power plants or chemical plants, maintenance space is often insufficient, and after the heater is damaged, the heater cannot be smoothly dismounted and replaced due to the fact that sufficient space is not available outside the equipment.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in providing a flexible heater suitable for maintenance space is narrow and small.

The utility model provides a technical scheme that its technical problem adopted is: providing a flexible heater, which comprises a first spiral heating element and a second spiral heating element which are axially connected;

at least one end of the first spiral heating element extends to form a first leading-out end, and at least one end of the second spiral heating element extends to form a second leading-out end; the second leading-out end penetrates through the inner ring of the first spiral heating element along the axial direction of the first spiral heating element and is parallel to the first leading-out end at intervals.

Preferably, the first helical heating element has a double helix structure.

Preferably, the first spiral heating element is formed by bending a heating strip into two heating strips side by side and winding the heating strips in the same direction; the tip of two heating strips extends respectively to be equipped with the first end of drawing forth, two the first end interval of drawing forth is located side by side the same one end of first heliciform heating member.

Preferably, the heating strip comprises a flexible metal tube, a heating wire arranged in the flexible metal tube along the axial direction of the flexible metal tube, and an insulating layer tightly filled between the heating wire and the flexible metal tube.

Preferably, the second helical heating element is of a double helix structure.

Preferably, the second spiral heating element is formed by bending a heating strip into two heating strips side by side and winding the heating strips in the same direction; the tip of two heating strips extends respectively to be equipped with the end is drawn forth to the second, two the second is drawn forth the end and is followed the same one end of second heliciform heating member is outwards extended, passes first heliciform heating member and with the end looks interval parallel is drawn forth to the first.

Preferably, the flexible heater further comprises a metal end plate; the first leading-out end and the second leading-out end are inserted on the metal end plate.

Preferably, the flexible heater further comprises a third spiral heating element axially connected with the second spiral heating element, and at least one end of the third spiral heating element extends to form a third leading-out end; the third leading-out end sequentially penetrates through the inner rings of the second spiral heating element and the first spiral heating element and is parallel to the first leading-out end and the second leading-out end at intervals.

Preferably, the third helical heating element has a double helix structure.

Preferably, the third spiral heating element is formed by bending a heating strip into two heating strips side by side and winding the heating strips in the same direction; the tip of two heating strips extends respectively to be equipped with the end is drawn forth to the third, two the third is drawn forth the end and is followed the same one end of third heliciform heating member is outwards extended, passes in proper order second heliciform heating member and first heliciform heating member and with first end, the second is drawn forth end looks interval parallel.

The utility model discloses a flexible heater wholly is the heliciform, and flexible or compressive deformation change holistic length to be applicable to narrow and small maintenance space, operations such as easy to assemble, maintenance and change.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic structural diagram of a flexible heater according to an embodiment of the present invention;

fig. 2 is a schematic view of another orientation of the flexible heater of fig. 1.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, the flexible heater according to an embodiment of the present invention includes a first helical heating element 10 and a second helical heating element 20 connected in an axial direction. At least one end of the first spiral heating element 10 extends to form a first leading-out end 11, and at least one end of the second spiral heating element 20 extends to form a second leading-out end 21; the second lead-out terminal 21 passes through the inner coil of the first helical heating member 10 in the axial direction thereof, and is parallel to the first lead-out terminal 11 at an interval. The first and second terminals 11 and 21 are located at least one end of the flexible heater for external power supply and the like.

In which the first helical heating element 10 and the second helical heating element 20 are spirally arranged so as to be stretchable and bendable like a spring. The first lead-out terminal 11 is extended and disposed at the end of the first helical heating element 10, and may be linearly disposed so as to be circumscribed. The second helical heating element 20 is contiguous to the first helical heating element 10 in the axial direction so that the length of the main body of the flexible heater can be the superposition of the lengths of the two. The second leading-out terminal 21 passes through the first spiral heating element 10 and is arranged in parallel with the first leading-out terminal 11 at intervals, and is convenient for external use with the same end of the first leading-out terminal 11 positioned on the flexible heater.

In addition, the second leading-out end 21 passes through the inner ring of the first spiral heating element 10, and also has a supporting function, so that the strength of the flexible heater is maintained, and the influence of the self-bending of the whole flexible heater on the use is prevented.

The spiral coil of the end of the second spiral heating element 20 is connected to the spiral coil of the end of the first spiral heating element 10, and a connection pad may be provided at the joint of the two to enhance the strength.

The lengths of the first helical heating element 10 and the second helical heating element 20 can both be set according to the heating power required by the flexible heater. The length of the first helical heating element 10 may or may not be the same as the length of the second helical heating element 20.

In the present embodiment, as shown in fig. 1, the first helical heating element 10 has a double helix structure.

Alternatively, the first helical heating element 10 may be formed by a heating strip bent into two heating strips side by side (e.g., U-shaped) and wound in the same direction. The end parts of the two heating strips are respectively provided with a first leading-out end 11 in an extending mode, and the two first leading-out ends 11 are arranged at the same end of the first spiral heating element 10 side by side at intervals.

The second helical heating element 20 is also of a double helix structure. Similarly to the first helical heating element 10, the second helical heating element 20 may be formed by bending a heating strip into two heating strips side by side and winding them in the same direction. The ends of the two heating strips are respectively provided with a second leading-out end 21 in an extending way, and the two second leading-out ends 21 extend outwards from the same end of the second spiral heating element 20, penetrate through the first spiral heating element 10 and are parallel to the first leading-out end 11 at intervals.

The heating strips for manufacturing the first helical heating element 10 and the second helical heating element 20 may structurally include a flexible metal tube, a heating wire axially disposed therein along the flexible metal tube, and an insulating layer closely filled between the heating wire and the flexible metal tube. The heating wire can be an alloy heating wire.

Further, the flexible heater of the present invention further comprises a metal end plate 40; the first and second terminals 11 and 21 are inserted into the metal end plate 40.

To satisfy the higher heating power, the flexible heater of the present invention may further include a third spiral heating element 30.

The third helical heating member 30 is axially contiguous with the second helical heating member 20 so that the first helical heating member 10, the second helical heating member 20, and the third helical heating member 30 are axially contiguous in sequence. At least one end of the third spiral heating element 30 extends to form a third leading-out end 31; the third lead-out terminal 31 passes through the inner turns of the second helical heating member 20 and the first helical heating member 10 in sequence, and is parallel to the first lead-out terminal 11 and the second lead-out terminal 21 at intervals. The first terminal 11, the second terminal 21 and the third terminal 31 are fixed by being inserted into the metal end plate 40.

The third helical heating element 30 is connected to the second helical heating element 20 at the end portion thereof at a helical turn, and a connection pad may be provided at the joint of the two to enhance strength.

The third helical heating element 30 may also be of a double helix construction.

Alternatively, the third helical heating element 30 may be formed by a heating strip that is bent into two side-by-side heating strips and wound in the same direction. The end parts of the two heating strips are respectively provided with a third leading-out end 31 in an extending way, the two third leading-out ends 31 extend outwards from the same end of the third spiral heating element 30, sequentially pass through the second spiral heating element 20 and the first spiral heating element 10 and are parallel to the first leading-out end 11 and the second leading-out end 21 at intervals.

The heating strip of which the third helical heating element 30 is formed may have the same structure as the heating strip of which the second helical heating element 20 and the first helical heating element 10 are formed.

The utility model discloses a flexible heater, the setting of the multiple different length of first heliciform heating member 10, second heliciform heating member 20 and third heliciform heating member 30 wherein of accessible obtains the heating power of multiple difference to be applicable to in various firing equipment.

The utility model discloses a flexible heater uses in equipment such as firing equipment, and flexible heater in firing equipment needs to maintain or more under the smooth condition, and when the maintenance space in the firing equipment outside was comparatively narrow and small, the staff can be crooked or compress flexible heater, shortens its length when the user state, takes out it again, solves the maintenance space comparatively narrow and small be not enough to keep using length with whole flexible heater and the problem that shifts out. When the new flexible heater is replaced, the flexible heater can be bent or compressed, the length is shortened and then the flexible heater is installed in the heating equipment, the original length of the flexible heater can be recovered after the external force is removed, and the operation is simple.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims (10)

1. A flexible heater is characterized by comprising a first spiral heating element and a second spiral heating element which are axially connected;

at least one end of the first spiral heating element extends to form a first leading-out end, and at least one end of the second spiral heating element extends to form a second leading-out end; the second leading-out end penetrates through the inner ring of the first spiral heating element along the axial direction of the first spiral heating element and is parallel to the first leading-out end at intervals.

2. The flexible heater according to claim 1, wherein the first helical heating element is of a double helix configuration.

3. The flexible heater according to claim 2, wherein said first helical heating element is formed by a heating strip bent into two side-by-side heating strips and wound in the same direction; the tip of two heating strips extends respectively to be equipped with the first end of drawing forth, two the first end interval of drawing forth is located side by side the same one end of first heliciform heating member.

4. The flexible heater according to claim 3, wherein the heating strip comprises a flexible metal tube, a heater disposed therein axially along the flexible metal tube, and an insulating layer closely packed between the heater and the flexible metal tube.

5. The flexible heater according to claim 1, wherein the second helical heating element is of a double helix configuration.

6. The flexible heater according to claim 5, wherein said second helical heating element is formed by a heating strip bent into two side-by-side heating strips and wound in the same direction; the tip of two heating strips extends respectively to be equipped with the end is drawn forth to the second, two the second is drawn forth the end and is followed the same one end of second heliciform heating member is outwards extended, passes first heliciform heating member and with the end looks interval parallel is drawn forth to the first.

7. The flexible heater of claim 1, further comprising a metal end plate; the first leading-out end and the second leading-out end are inserted on the metal end plate.

8. The flexible heater according to any one of claims 1-7, further comprising a third helical heating element axially connected to the second helical heating element, at least one end of the third helical heating element extending to provide a third lead-out; the third leading-out end sequentially penetrates through the inner rings of the second spiral heating element and the first spiral heating element and is parallel to the first leading-out end and the second leading-out end at intervals.

9. The flexible heater according to claim 8, wherein the third helical heating element is of a double helix construction.

10. The flexible heater according to claim 9, wherein the third helical heating element is formed by a heating strip bent into two side-by-side heating strips and wound in the same direction; the tip of two heating strips extends respectively to be equipped with the end is drawn forth to the third, two the third is drawn forth the end and is followed the same one end of third heliciform heating member is outwards extended, passes in proper order second heliciform heating member and first heliciform heating member and with first end, the second is drawn forth end looks interval parallel.

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