CN219718502U - Single-ended electric heating tube - Google Patents
Single-ended electric heating tube Download PDFInfo
- Publication number
- CN219718502U CN219718502U CN202321051863.2U CN202321051863U CN219718502U CN 219718502 U CN219718502 U CN 219718502U CN 202321051863 U CN202321051863 U CN 202321051863U CN 219718502 U CN219718502 U CN 219718502U
- Authority
- CN
- China
- Prior art keywords
- heating tube
- tube
- magnesium
- electric heating
- ended
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005485 electric heating Methods 0.000 title claims abstract description 40
- 238000010438 heat treatment Methods 0.000 claims abstract description 68
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 43
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 19
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 15
- 230000000149 penetrating effect Effects 0.000 claims abstract description 14
- 238000000605 extraction Methods 0.000 claims abstract description 9
- 229910001120 nichrome Inorganic materials 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 8
- 229910052749 magnesium Inorganic materials 0.000 abstract description 8
- 239000011777 magnesium Substances 0.000 abstract description 8
- 230000017525 heat dissipation Effects 0.000 abstract description 6
- 238000013021 overheating Methods 0.000 abstract description 6
- 238000012546 transfer Methods 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000002184 metal Substances 0.000 description 11
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010339 medical test Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Landscapes
- Resistance Heating (AREA)
Abstract
The utility model discloses a single-ended electric heating tube, which comprises an extraction electrode, an outer tube, a magnesium rod and a heating element; the magnesium stick sets up in the outer tube, and the one end of magnesium stick is provided with a plurality of wire holes along length direction. According to the utility model, by using the technical means of arranging the magnesium rods with the wire penetrating holes and the heating elements (such as nichrome wires) penetrating the corresponding wire penetrating holes on the magnesium rods, filling the magnesium oxide powder and the like, the heating uniformity inside the electric heating pipe is improved, the magnesium oxide powder with higher compactness between the outer pipe and the magnesium rods is improved, the heat transfer performance is improved, the heat dissipation capability of the electric heating pipe is improved, the risk of local overheating of the heating elements is reduced, and the service life of the heating pipe is prolonged.
Description
Technical Field
The utility model relates to a single-ended electric heating tube.
Background
The single-end heating pipe structure is a heating element with one end being outgoing and the other end being closed. Compared with the heating element with two outgoing lines at two ends, the single-end heating pipe has lower requirement on the installation space of the heated element, and is suitable for heating a die, preheating a compressor, heat treatment of medical test equipment and special components and the like. The heating equipment has the characteristics of simple structure, convenient use, high heating speed, convenient installation and the like.
However, when the single-ended electric heating tube is used, the single-ended electric heating tube is inserted into an object to be heated, so that a fit clearance exists between the single-ended electric heating tube and the object, and the heat dissipation condition is poor. This can lead to scorching, oxidation, deformation of the stainless steel tube outside the cartridge and further to melting of the internal heating element (the electrical heating alloy wire) due to high temperature idle firing. These problems can shorten the service life of single-ended electrical heating tubes. Therefore, the high-quality single-end electric heating tube not only needs to have high product quality, but also needs to have good matching between the material of the die and the processing aperture (the closer the aperture and the tube diameter are), so as to be beneficial to heat energy conduction and prolong the service life of the electric heating tube. But the closer the aperture is to the pipe diameter, the greater the installation difficulty is, and the replacement is not facilitated.
Disclosure of Invention
The main purpose of the utility model is to provide a single-end electric heating tube, which improves the heat dissipation capacity of the single-end electric heating tube by improving the internal structure of the single-end electric heating tube.
The aim of the utility model can be achieved by adopting the following technical scheme:
a single-ended electric heating tube comprises an extraction electrode, an outer tube, a magnesium rod and a heating element; the magnesium rod is arranged in the outer tube, one end of the magnesium rod is provided with a plurality of wire penetrating holes along the length direction, a part of heating elements or each wire penetrating hole are penetrated in each wire penetrating hole, the plurality of heating elements are uniformly distributed along the circumferential direction, and the heating elements are connected with the extraction electrodes so as to be connected to an external power supply; the magnesium oxide powder is tightly filled between the outer tube and the magnesium rod.
Preferably, a hole is formed in the center of the magnesium rod along the length direction, a temperature measuring sleeve is arranged in the hole, a temperature measuring element is arranged in the temperature measuring sleeve, and the temperature measuring element is a temperature control switch, an adjustable temperature controller or a temperature sensor.
Preferably, a plurality of the heating elements are arranged around the temperature measuring sleeve.
Preferably, one end of the single-ended electric heating tube is provided with a flange or a threaded fastener.
Preferably, the lead-out electrode of the single-ended electric heating tube is directly extended from one end of the outer tube through a wire and connected to an external power source, or the lead-out electrode of the single-ended electric heating tube is connected to a junction box installed at an upper portion of the flange and then connected to the external power source from the junction box.
Preferably, the other end of the outer tube is provided with a sealing head, so that the other end of the outer tube is in a closed state to protect the internal components.
Preferably, the heating element is a nichrome wire.
Preferably, the magnesia powder fills the gap between the magnesium rod and the outer tube, and the gap rate is lower than 5%.
The beneficial technical effects of the utility model are as follows:
1. according to the utility model, by using the technical means of arranging the magnesium rods with the wire penetrating holes and the heating elements (such as nichrome wires) penetrating the corresponding wire penetrating holes on the magnesium rods, filling the magnesium oxide powder and the like, the heating uniformity inside the electric heating pipe is improved, the magnesium oxide powder with higher compactness between the outer pipe and the magnesium rods is improved, the heat transfer performance is improved, the heat dissipation capability of the electric heating pipe is improved, the risk of local overheating of the heating elements is reduced, and the service life of the heating pipe is prolonged.
2. According to the utility model, the center of the magnesium rod is provided with the hole, and the temperature measuring sleeve is placed in the hole, so that the temperature inside the heating pipe can be detected in real time, the overheating and burning of the heating pipe are prevented, the working temperature of the electric heating pipe can be better controlled, and the damage of the electric heating pipe caused by overhigh temperature is avoided.
Drawings
FIG. 1 is a schematic cross-sectional view of a single-ended electrical heating tube in accordance with an embodiment of the utility model;
FIG. 2 is a schematic end view of a two-hole magnesium rod according to an embodiment of the utility model;
FIG. 3 is a schematic end view of a three-hole magnesium rod according to an embodiment of the utility model;
FIG. 4 is a schematic diagram of a temperature sensing sleeve with an adjustable temperature controller in accordance with an embodiment of the present utility model;
FIG. 5 is a schematic diagram of a temperature sensing sleeve with a temperature sensor according to an embodiment of the present utility model;
FIG. 6 is a schematic diagram of a temperature sensing sleeve with a temperature controlled switch according to an embodiment of the present utility model.
In the figure: 2-leading-out electrode, 3-outer tube, 4-magnesium rod, 401-threading hole, 5-heating element, 6-temperature measuring sleeve and 7-sealing head.
Detailed Description
In order to make the technical solution of the present utility model more clear and obvious to those skilled in the art, the present utility model will be described in further detail with reference to examples and drawings, but the embodiments of the present utility model are not limited thereto.
As shown in fig. 1 to 6, the single-ended electric heating tube structure provided in this embodiment includes an extraction electrode 2, a metal outer tube 3, a magnesium rod 4, a heating element 5, a temperature measuring sleeve 6 and an end enclosure 7;
the metal outer tube 3 is a shell of a single-ended heating tube and is used for bearing all internal components, the lead-out electrode 2 is led out outwards at one end of the metal outer tube 3, and the other end of the metal outer tube 3 is provided with a sealing head 7, so that the other end of the metal outer tube 3 is in a closed state to protect the internal components, and insulating sealing materials are filled between the sealing head 7 and the metal outer tube 3 to ensure the insulation and sealing between the interior and the exterior of the heating tube;
the insulating magnesium rod 4 is positioned in the metal outer tube 3 and is of a porous structure, the insulating magnesium rod 4 has the functions of fixing and insulating the heating element 5, the porous holes are two or more wire penetrating holes 401 formed in one end face of the insulating magnesium rod 4 along the length direction, the wire penetrating holes 401 are uniformly distributed along the circumferential direction, the porous holes can be two holes, three holes, four holes or six holes and the like, the heating element 5 is inserted into each wire penetrating hole 401, when the position of the temperature measuring sleeve 6 is a round point, the heating elements 5 are uniformly arranged (uniformly spaced), the heating elements 5 are nickel-chromium alloy wires, the alloy wires penetrate through the porous magnesium rod, the uniformly distributed alloy wires enable heating to be more uniform, and the heat dissipation of the single-end electric heating tube is facilitated by matching with magnesium oxide powder (by improving the heating uniformity inside the electric heating tube and the heat transfer performance, the heat can be more uniformly distributed in the whole heating tube, so that the risk of local overheating of the heating element is avoided), the medium (an object needing heating) is heated uniformly, and the service life of the heating tube is prolonged;
the end part of the heating element 5 can be connected in series, in parallel, in star shape or in triangle shape according to the power and voltage requirements, the heating element 5 is connected with the extraction electrode 2 and then is connected with an external power supply, and magnesia powder is filled in the insulating magnesium rod 4 and outside (namely, the magnesia powder is tightly filled in the gap between the magnesium rod 4 and the metal outer tube 3) so as to improve the heat transfer performance;
a hole is formed in the center of the magnesium rod 4 along the length direction, a temperature measuring sleeve 6 is arranged in the hole, a plurality of heating elements 5 are arranged around the temperature measuring sleeve 6, and the temperature measuring elements are arranged in the temperature measuring sleeve 6 and are temperature control switches, adjustable temperature controllers or temperature sensors and are used for detecting the temperature inside the heating pipe in real time and performing corresponding control;
when the heating pipe works, heat generated by the heating element 5 can be conducted to the magnesium rod 4 and surrounding magnesium oxide powder, and the heat can be further conducted to the temperature measuring sleeve 6, so that the temperature measuring element can sense the change of temperature;
the temperature measuring element can well protect the electric heating tube when the single-end electric heating tube works, prevent overheat, and prolong the service life of the single-end electric heating tube.
In this embodiment, the single-ended electric heating tube may be provided with a flange or a threaded fastener at an end portion thereof, and the front portion may be a junction box in which the lead-out electrode 2 is directly extended from one end of the metal outer tube 3 through a wire and connected to an external power source or a controller, or may be a junction flange mounted on an upper portion of the connection flange of the lead-out electrode 2, and then connected from the junction box to the external power source, depending on the use.
In this embodiment, the lead-out electrode 2 of the single-ended electric heating tube is directly extended out through a wire, so that the lead-out electrode is convenient to connect with an external power supply, and the method is simple and economical and is suitable for occasions without additional protection or sealing.
In this embodiment, the lead-out electrode 2 of the single-ended electric heating tube is connected to a junction box mounted on the upper portion of the flange, and the junction box provides a safe and sealed environment for electric connection, can prevent the influence of moisture, dust, corrosive substances and the like on the electric connection, and is suitable for occasions with high requirements on safety and sealing performance.
In this embodiment, the magnesium oxide powder fills the gaps between the magnesium rod 4 and the metal outer tube 3 sufficiently during the filling process, so that the gap rate is lower than 5% or other (or lower than 3% or other), thereby realizing high-compactness magnesium oxide powder filling, and when the gap rate is lower than 5%, the magnesium oxide powder fills the gaps between the magnesium rod 4 and the metal outer tube 3, 95% or more of available space is occupied, so that only little air or other material (proportion lower than 5%) exists in the gaps, which means that the magnesium oxide powder filling is very tight, and is beneficial to improving the heat conductivity.
In this embodiment, alumina powder or other filler material capable of insulating and conducting heat inside the electric heating tube can be used instead of magnesia powder.
In this embodiment, as shown in the drawing, three wire-passing holes 401 are arranged in an equilateral triangle, that is, three wire-passing holes 401 are used as three points to form an equilateral triangle, and four wire-passing holes 401 are arranged in a regular quadrilateral, which is the same.
In this embodiment, when the temperature measuring element is a temperature control switch (-50 ℃ -200 ℃), and when the temperature reaches a set threshold, the temperature control switch will be automatically turned on or turned off, so as to control the operation of the heating pipe, which helps to prevent the heating pipe from overheating or burning out.
In this embodiment, when the temperature measuring element is an adjustable temperature controller (0 ℃ to 500 ℃), the adjustable temperature controller allows a user to set a temperature range according to needs, and when the temperature exceeds the set range, the adjustable temperature controller automatically adjusts the power of the heating pipe to control the temperature.
In this embodiment, when the temperature measuring element is a temperature sensor, the temperature sensor converts temperature information into electrical signals, which are transmitted to a temperature control system of the single-ended electric heating tube for temperature monitoring and adjustment.
In summary, in this embodiment, by using the technical means of arranging the magnesium rod with the plurality of wire holes and the heating element (such as nichrome wire) through the corresponding wire holes on the magnesium rod, filling the magnesium oxide powder, etc., the heating uniformity inside the electric heating tube is improved, and the magnesium oxide powder with higher compactness between the outer tube and the magnesium rod improves the heat transfer performance, which is helpful for improving the heat dissipation capability of the electric heating tube, reducing the risk of local overheating of the heating element, and thus prolonging the service life of the heating tube.
The above description is merely a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto, and any person skilled in the art will be able to apply equivalents and modifications according to the technical solution and the concept of the present utility model within the scope of the present utility model disclosed in the present utility model.
Claims (8)
1. A single-ended electric heating tube, characterized in that: comprises an extraction electrode (2), an outer tube (3), a magnesium rod (4) and a heating element (5); the magnesium rod (4) is arranged in the outer tube (3), one end of the magnesium rod (4) is provided with a plurality of wire penetrating holes (401) along the length direction, heating elements (5) are inserted into part or each wire penetrating hole (401), the plurality of heating elements (5) are uniformly distributed along the circumferential direction, and the heating elements (5) are connected with the extraction electrode (2) so as to be connected to an external power supply; the magnesium oxide powder is tightly filled between the outer tube (3) and the magnesium rod (4).
2. The single-ended electrical heating tube of claim 1, wherein: a hole is formed in the center of the magnesium rod (4) along the length direction, a temperature measuring sleeve (6) is arranged in the hole, a temperature measuring element is arranged in the temperature measuring sleeve (6), and the temperature measuring element is a temperature control switch, an adjustable temperature controller or a temperature sensor.
3. The single-ended electrical heating tube of claim 2, wherein: a plurality of heating elements (5) are arranged around the temperature measuring sleeve (6).
4. The single-ended electrical heating tube of claim 1, wherein: one end of the single-end electric heating tube is provided with a flange or a threaded fastener.
5. The single-ended electrical heating tube of claim 4, wherein: the extraction electrode (2) of the single-ended electric heating tube is directly extended from one end of the outer tube (3) through a wire and connected with an external power supply, or the extraction electrode (2) of the single-ended electric heating tube is connected to a junction box installed at the upper part of the flange and then connected to the external power supply from the junction box.
6. The single-ended electric heating tube of claim 5, wherein: the other end of the outer tube (3) is provided with a sealing head (7) so that the other end of the outer tube (3) is in a closed state to protect internal components.
7. The single-ended electrical heating tube of claim 1, wherein: the heating element (5) is a nichrome wire.
8. The single-ended electrical heating tube of claim 1, wherein: the magnesium oxide powder fills the gap between the magnesium rod (4) and the outer tube (3) and enables the gap rate to be lower than 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321051863.2U CN219718502U (en) | 2023-05-05 | 2023-05-05 | Single-ended electric heating tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321051863.2U CN219718502U (en) | 2023-05-05 | 2023-05-05 | Single-ended electric heating tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219718502U true CN219718502U (en) | 2023-09-19 |
Family
ID=87999064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321051863.2U Active CN219718502U (en) | 2023-05-05 | 2023-05-05 | Single-ended electric heating tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219718502U (en) |
-
2023
- 2023-05-05 CN CN202321051863.2U patent/CN219718502U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3105133A (en) | Electrically heated roll | |
| CN219718502U (en) | Single-ended electric heating tube | |
| CN110736560A (en) | Multi-point thermocouple probe tube for parallel connection of negative pole hot end of heating furnace | |
| CN205452979U (en) | Electric heat wire stripping pliers | |
| CN208238987U (en) | Thermocouple vacuum calibrating installation | |
| CN217115817U (en) | Intelligent monitoring device for overheat insulation and moisture prevention of high-voltage motor | |
| CN203668460U (en) | Sectional type heating device | |
| CN206546217U (en) | Temperature sensor and electrical equipment | |
| CN202839898U (en) | Lithium battery heating device | |
| CN219718513U (en) | Multitube type electric heating pipe structure | |
| CN113447524A (en) | Portable semiconductor material thermal conductivity detection device and use method | |
| CN206905258U (en) | Boundling short-circuit type electric heater | |
| KR101282493B1 (en) | Leverl switch sensor apparatus of electrode type | |
| CN208598152U (en) | A kind of liquid level detecting device and its kettle | |
| CN212576322U (en) | Novel heating device | |
| CN210328011U (en) | Temperature-controllable quick-connection thermal belt | |
| CN218972895U (en) | Electric heating device for methylamine production | |
| CN210896826U (en) | Protective resistor of power frequency transformer | |
| CN209657875U (en) | A kind of high temperature-resistant cable that can voluntarily adjust temperature | |
| CN108811198A (en) | A kind of novel electric heating circle | |
| CN216310634U (en) | Variable-frequency constant-temperature control system of aging room | |
| CN106196591A (en) | High-temperature gas electric heating tube | |
| CN210016647U (en) | Electric heating device | |
| CN220139752U (en) | Single-head electric heating pipe and magnesium rod structure | |
| CN108934086A (en) | A kind of oil immersion-type distribution transformer winding end conducting rod heating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |