CN112020162A - Single-head electric heating tube structure with built-in temperature probe and manufacturing method thereof - Google Patents
Single-head electric heating tube structure with built-in temperature probe and manufacturing method thereof Download PDFInfo
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- CN112020162A CN112020162A CN202010973891.4A CN202010973891A CN112020162A CN 112020162 A CN112020162 A CN 112020162A CN 202010973891 A CN202010973891 A CN 202010973891A CN 112020162 A CN112020162 A CN 112020162A
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- tube
- temperature probe
- electric heating
- sheath
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
- H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/017—Manufacturing methods or apparatus for heaters
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Resistance Heating (AREA)
Abstract
The invention belongs to the technical field of heaters, and particularly relates to a single-head electric heating tube structure with a built-in temperature probe and a manufacturing method thereof. The stainless steel tube comprises a stainless steel tube subjected to diameter shrinkage treatment, wherein a resistance wire is arranged in the tube body and filled with magnesium oxide powder, two ends of the resistance wire are respectively connected with an upper lead rod and a lower lead rod, and the upper lead rod is connected with a thermal fuse and an NTC temperature probe; four down-leading rods are provided, wherein two of the four down-leading rods are respectively welded with two ends of the thermal fuse to form a U-shaped loop; the other two are welded with two ends of the NTC temperature probe to form another U-shaped loop, and the two U-shaped loops are arranged in the PE sheath, are mutually connected in parallel and are not mutually contacted. The invention also provides a method for manufacturing the single-head electric heating tube structure. The invention has the advantages of good consistency, simple manufacturing process, low rejection rate, better performance, cost saving, large temperature detection range, uniform heating and the like.
Description
Technical Field
The invention belongs to the technical field of heaters, and particularly relates to a single-head electric heating tube structure with a built-in temperature probe and a manufacturing method thereof.
Background
Along with the increasing living standard, the electric heating equipment is more and more popularized in the non-collective heating areas, the types of heating elements on the electric heating equipment are more and more, particularly, the market demand of the electric heating pipe is rapidly increased, and the existing products in the market with the same functions as the electric heating pipe have the following defects:
1. the product of this structure uses the mode production of magnesium oxide stick equipment resistance wire with filling powder, and the equipment is wasted time and energy, especially the long product of pipe length, and the magnesium oxide stick equipment is difficult more and more, and it is big to receive the artificial influence in the equipment process, poor stability, and the disability rate is high, and production efficiency is very low, neither is fit for large-scale production, also makes manufacturing cost too high.
2. The thermal fuse is connected with the lower fuse rod, the upper fuse rod is connected with the power line and the NTC connecting wire, and the NTC temperature probe is connected with the resistance wire in a riveting mode.
3. The soft sleeve is used for fixing the thermal fuse and the NTC temperature probe, so that magnesium oxide powder falls into a gap between the soft sleeve and the stainless steel tube in the powder filling process, and the internal part of the sleeve can be crushed in the diameter reducing process.
4. Because of the adoption riveting is connected between leading stick and the power cord and the NTC connecting wire, the riveting point is inside the heating tube, and power cord and NTC connecting wire are softer, and easy coiling is in the same place in the assembly process, and the easy damage that leads to the disability rate is higher by tensile in the undergauge process.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art and provides a single-head electric heating tube structure with a built-in temperature probe and a manufacturing method thereof.
In order to solve the technical problems, the invention adopts the following solution:
the single-end electric heating tube structure with the built-in temperature probe comprises a stainless steel tube subjected to diameter reduction treatment, wherein a bottom cover is arranged at one end of a tube body, a flange is arranged outside the other end of the tube body, and a sealing material is arranged at a tube opening at the end of the flange; a resistance wire is arranged in the tube body and filled with magnesia powder, two ends of the resistance wire are respectively connected with an upper lead rod and a lower lead rod, the upper lead rod is connected with a power line and one end of an NTC connecting line, and the other ends of the power line and the NTC connecting line extend out of the tube; the PE protective sleeve and the PE protective ring are also included; four down-leading rods are provided, wherein two of the four down-leading rods are respectively welded with two ends of the thermal fuse to form a U-shaped loop; the other two are welded with two ends of the NTC temperature probe to form another U-shaped loop, and the two U-shaped loops are arranged in the PE sheath, are mutually connected in parallel and are not mutually contacted; the PE sheath is a tube sleeve structure with one end open, the PE protection ring comprises a lantern ring, the lantern ring is arranged in the open end of the PE sheath, the four tube sleeves with parallel axes are jointly arranged in the lantern ring, and the middle parts of the four down-leading rods are respectively sleeved in the four tube sleeves.
As an improvement, the thermal fuse and the NTC temperature probe are connected with the down-lead rod through terminal welding.
As an improvement, the outer diameter of the PE sheath is smaller than the inner diameter of the stainless steel pipe after the diameter reduction treatment.
As an improvement, still the cover is equipped with breakable steatite porcelain fixed bead on the part that the stick that draws down worn out the pipe box, and breakable steatite porcelain fixed bead is used for guaranteeing to draw down and has the interval between the stick and draw down between stick and the pipe wall down.
As an improvement, the power line and the connecting line extend out of the outer end of the stainless steel tube and are connected with a quick-connection plug; the structure of the single-head electric heating pipe is also provided with a grounding wire.
As an improvement, the diameter of the PE environment-friendly lantern ring is larger than the inner diameter of the stainless steel pipe after the diameter reduction treatment.
As an improvement, the inner wall of the opening end of the PE sheath is provided with a groove, the PE sheath ring is horn-shaped, the outside of the PE sheath ring is provided with a step structure, and the step structure can be matched with the groove of the opening of the PE sheath; the four pipe sleeves in the PE centering ring are arranged in a cross shape and are different in length, so that the situation that gaps of the four guide rods are too small due to welding spots is avoided.
A method for manufacturing the single-head electric heating tube structure comprises the following steps:
(1) the joint of the thermal fuse and the NTC temperature probe is riveted with an upper terminal, then is respectively welded with four down-leading rods, and then the thermal fuse and the NTC temperature probe are arranged in a PE protective ring and a PE protective sleeve;
(2) one end of the resistance wire is welded with the upper leading bar, the other end of the resistance wire is welded with the lower leading bar, then the assembly is hung on the automatic powder filling machine through a hook on the upper leading bar, a stainless steel pipe with a welded bottom cover is sleeved, and magnesium oxide powder is filled;
(3) and after powder filling, sealing the pipe orifice by using a silicon rubber plug, reducing the diameter of the pipe body by using a pipe reducing machine, welding a power line and an NTC connecting wire on the exposed upward leading rod, and finally riveting and pressing a flange and sealing by using a sealing material.
The principle of the invention is as follows:
between hot fuse and NTC temperature probe and the welding formula down draw the stick, all through welded connection between welding formula up draw the stick and power cord and the NTC connecting wire, can effectively strengthen joint strength, ensure that the tie point is not broken at the undergauge in-process. The welding process of the power line, the NTC connecting line and the welding type upward-leading rod is performed after the diameter is reduced, and the welding is performed outside the orifice of the heating pipe, so that the problem that the welding area and the wire are twisted together to damage the wire due to the diameter reduction is completely avoided.
The PE sheath and the PE protection ring which are designed independently can meet the requirements of insulation and production processes, meanwhile, the PE protection ring can effectively prevent magnesium oxide powder from entering a gap between the PE sheath and the stainless steel pipe, and the outer diameter of the PE sheath is smaller than the inner diameter of the stainless steel pipe after the diameter is reduced, so that the thermal fuse and the NTC temperature probe are not extruded in the diameter reducing process, and the rejection rate is effectively reduced.
Compared with the prior art, the invention has the beneficial effects that:
the invention has the advantages of good consistency, simple manufacturing process, low rejection rate, better performance, cost saving, large temperature detection range, uniform heating and the like.
Drawings
Fig. 1 is a schematic structural view of a conventional electric heating tube;
FIG. 2 is a schematic structural view of an electric heating tube of the present invention (the connection mode exposed outside the tube is a flexible wire);
fig. 3 is a right side view of the electric heating tube of the present invention (the connection mode outside the exposed tube is a flexible wire);
fig. 4 is a schematic structural view of an electric heating tube of the present invention (the connection mode exposed outside the tube is a quick-connect plug);
fig. 5 is a right side view of the electric heating tube of the present invention (the connection mode outside the exposed tube is a quick-connect plug);
FIG. 6 is a schematic diagram of the assembly of the PE protective ring, the PE protective sleeve, the thermal fuse, the NTC temperature probe and the down-lead rod according to the present invention.
FIG. 7 is a schematic view of the PE sheath according to the present invention;
FIG. 8 is a schematic diagram of the PE protection ring according to the present invention.
Description of reference numerals:
1-bottom cover, 2-stainless steel tube, 3-thermal fuse, 4-NTC temperature probe, 5-terminal, 6-magnesia powder, 7-resistance wire, 8-silica gel plug, 9-grounding wire, 10-flange, 11-epoxy resin glue, 12-power line, 13-NTC connecting wire, 14-quick-connection plug, 15-PE sheath, 16-PE protective ring, 17-fragile steatite porcelain fixing bead, 18-down rod, 19-up rod, 20-thermal shrinkage sheath, 21-magnesia rod, 22-grounding pin, 23-NTC pin and 24-power line pin.
Detailed Description
The invention is described in further detail below with reference to the following detailed description and accompanying drawings:
as shown in fig. 1, a single-end electric heating tube structure with a built-in temperature probe in the prior art includes a stainless steel tube 2 subjected to diameter reduction treatment, wherein a bottom cover 1 is arranged at one end of the stainless steel tube 2, and a flange 10 is arranged outside the other end. The upward rod 19 and the downward rod 18 are connected through the resistance wire 7 in a riveting mode and are arranged in the stainless steel tube 2 together, the upward rod 19 is connected with the power line 12 and the NTC connecting line 13 in a riveting mode, the power line 12 and the NTC connecting line 13 are led out of the stainless steel tube 2, and the tube opening is sealed through epoxy resin glue 11. The thermal fuse 3 and the NTC temperature probe 4 which are riveted with the terminals are respectively welded with a welding type down-leading rod 18, then a plurality of four-hole magnesium oxide rods 21 are penetrated, the parts of the thermal fuse 3 and the NTC temperature probe 4 exposed outside the magnesium oxide rods are insulated with the appearance by a thermal shrinkage sheath 20, and the rest space in the stainless steel pipe 2 is filled with magnesium oxide powder 6.
Example 1
Referring to fig. 2, a single-end electric heating tube structure with a built-in temperature probe comprises a stainless steel tube 2 subjected to diameter reduction treatment, wherein a bottom cover 1 is arranged at one end of the stainless steel tube 2, and a flange 10 is arranged outside the other end of the stainless steel tube. The upward-leading rod 19 and the downward-leading rod 18 are connected through a resistance wire 7 in a welding mode and are arranged in the stainless steel tube 2 together, the upward-leading rod 19 is connected with one end of a power line 12 and one end of an NTC connecting wire 13 in a welding mode, the other end of the power line 12 and the other end of the NTC connecting wire 13 are connected with a contact pin of a quick-connection plug 14, five contact pins of the quick-connection plug 14 are led out of the stainless steel tube 2, a grounding wire 9 is arranged on a tube opening and is sealed through epoxy resin.
The thermal fuse 3 and the NTC temperature probe 4, which are riveted with the terminals, are welded to a welding type down-lead bar, respectively, and then are loaded into a PE sheath 16 and a PE sheath 15. The number of the down-draw bars 18 is 4. Four down-leading rods are provided, wherein two of the four down-leading rods are respectively welded with two ends of the thermal fuse 3 to form a U-shaped loop; the other two are welded with two ends of the NTC temperature probe 4 to form another U-shaped loop, and the two U-shaped loops are arranged in the PE sheath 15, are mutually connected in parallel and are not mutually contacted; the PE sheath 15 is of a tube sleeve structure, one end of the PE sheath is open, the PE protection ring 16 comprises a sleeve ring, the sleeve ring is arranged in the open end of the PE sheath 15, the four tube sleeves with parallel axes are jointly arranged in the sleeve ring, and the middle parts of the four downward leading rods 18 are respectively sleeved in the four tube sleeves. The down-leading rods 18 outside the sleeve are also sleeved with fragile steatite porcelain fixing beads 17 for ensuring the distance between the down-leading rods 18 and the pipe wall so as to ensure the electrical property of the product. The inner wall of the opening end of the PE sheath 15 is provided with a groove, the ring 16 of the PE sheath is horn-shaped, the outer part of the ring is provided with a step structure, and the step structure can be matched with the groove of the opening end of the PE sheath 15; the four pipe sleeves in the PE protective ring 16 are arranged in a cross shape and have different lengths, so that the situation that gaps among the four guide rods are too small due to welding spots is avoided. The outer diameter of the PE sheath 15 is smaller than the inner diameter of the stainless steel pipe 2 after diameter reduction. The electric heating pipe is also connected with a grounding wire 9.
The NTC temperature probe 4 in the invention is a thermistor. Conventional commercially available products can be used. The automatic powder filling machine used with the device of the invention can adopt products of models 1CTDZ310Q series, 1CTDZ406Q series, 1CTDZ709Q series, 1CTDZ729Q series, 1CTDZ845Q series, 1CTDZ900Q series, 1CTDZ951Q series and 1CTDZ956Q series, which are produced by Hangzhou Zong Pax industry Co.
The invention also provides a method for manufacturing the single-head electric heating tube structure, which comprises the following steps:
(1) the joints of the thermal fuse 3 and the NTC temperature probe 4 are firstly riveted with an upper terminal 5 and then respectively welded with four down-leading rods 18, and then the thermal fuse 3, the NTC temperature probe 4 and the welded down-leading rods 18 are arranged in a PE protective ring 16 and a PE protective ring 15;
(2) one end of the resistance wire 7 is welded with the upper leading rod 19, the other end is welded with the lower leading rod 18, then the assembly is hung on the automatic powder filling machine through a hook on the upper leading rod 19, the stainless steel pipe 2 welded with the bottom cover 1 is sleeved, and the magnesium oxide powder 6 is filled;
(3) after powder filling, the silicon rubber plug 8 is used for sealing the pipe opening, the pipe reducing machine is used for reducing the diameter of the stainless steel pipe 2, then the power line 12 and the NTC connecting line 13 are welded on the exposed upward leading rod 19, and finally the flange 10 is riveted and sealed by epoxy resin glue 11.
Finally, it should be noted that the above-mentioned list is only a specific embodiment of the present invention. It is obvious that the present invention is not limited to the above embodiments, but many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (8)
1. A single-end electric heating tube structure with a built-in temperature probe comprises a stainless steel tube subjected to diameter reduction treatment, wherein a bottom cover is arranged at one end of a tube body, a flange is arranged outside the other end of the tube body, and a sealing material is arranged at a tube opening at the end of the flange; a resistance wire is arranged in the tube body and filled with magnesia powder, two ends of the resistance wire are respectively connected with an upper lead rod and a lower lead rod, the upper lead rod is connected with a power line and one end of an NTC connecting line, and the other ends of the power line and the NTC connecting line extend out of the tube; it is characterized by also comprising a PE sheath and a PE protection ring; four down-leading rods are arranged, wherein two of the four down-leading rods are respectively welded with two ends of the thermal fuse to form a U-shaped loop; the other two are welded with two ends of the NTC temperature probe to form another U-shaped loop, and the two U-shaped loops are arranged in the PE sheath, are mutually connected in parallel and are not mutually contacted; the PE sheath is a tube sleeve structure, one end of the PE sheath is open, the PE sheath ring comprises a lantern ring, the lantern ring is arranged in the open end of the PE sheath, the four tube sleeves with parallel axes are jointly arranged in the lantern ring, and the middle parts of the four downward leading rods are respectively sleeved in the four tube sleeves.
2. The structure of a single-ended electric heating tube with a built-in temperature probe as claimed in claim 1, wherein the thermal fuse and the NTC temperature probe are connected with the down-lead rod by welding via terminals.
3. The structure of the single-ended electric heating tube with a built-in temperature probe as claimed in claim 1, wherein the outer diameter of the PE sheath is smaller than the inner diameter of the stainless steel tube after diameter reduction.
4. The structure of the single-head electric heating tube with the built-in temperature probe as claimed in claim 1, wherein the part of the down-leading rod, which penetrates out of the tube sleeve, is further sleeved with a fragile steatite porcelain fixing bead, and the fragile steatite porcelain fixing bead is used for ensuring that a space exists between the down-leading rods and the tube wall.
5. The structure of a single-ended electric heating tube with a built-in temperature probe as claimed in claim 1, wherein the power line and the connecting line extend out of the stainless steel tube and are connected with a quick-connect plug; and the structure of the single-head electric heating pipe is also provided with a grounding wire.
6. The structure of a single-ended electric heating tube with a built-in temperature probe as claimed in claim 1, wherein the diameter of the PE protective ring is larger than the inner diameter of the stainless steel tube after diameter reduction.
7. The structure of a single-head electric heating tube with a built-in temperature probe as claimed in claim 1, wherein the inner wall of the opening end of the PE sheath is provided with a groove, the PE sheath ring is horn-shaped and is externally provided with a step structure, and the step structure can be matched with the groove of the opening of the PE sheath; the four pipe sleeves in the PE centering ring are arranged in a cross shape and are different in length, so that the situation that gaps of the four guide rods are too small due to welding spots is avoided.
8. A method of manufacturing a single-ended electric heating tube structure according to claims 1-7, characterized by the steps of:
(1) the joint of the thermal fuse and the NTC temperature probe is riveted with an upper terminal, then is respectively welded with four down-leading rods, and then the thermal fuse and the NTC temperature probe are arranged in a PE protective ring and a PE protective sleeve;
(2) one end of the resistance wire is welded with the upper leading bar, the other end of the resistance wire is welded with the lower leading bar, then the assembly is hung on the automatic powder filling machine through a hook on the upper leading bar, a stainless steel pipe with a welded bottom cover is sleeved, and magnesium oxide powder is filled;
(3) and after powder filling, sealing the pipe orifice by using a silicon rubber plug, reducing the diameter of the pipe body by using a pipe reducing machine, welding a power line and an NTC connecting wire on the exposed upward leading rod, and finally riveting and pressing a flange and sealing by using a sealing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010973891.4A CN112020162A (en) | 2020-09-16 | 2020-09-16 | Single-head electric heating tube structure with built-in temperature probe and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010973891.4A CN112020162A (en) | 2020-09-16 | 2020-09-16 | Single-head electric heating tube structure with built-in temperature probe and manufacturing method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112020162A true CN112020162A (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010973891.4A Pending CN112020162A (en) | 2020-09-16 | 2020-09-16 | Single-head electric heating tube structure with built-in temperature probe and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113916274A (en) * | 2021-10-14 | 2022-01-11 | 深圳市深思泰电子科技有限公司 | Waterproof high temperature resistant sensor |
-
2020
- 2020-09-16 CN CN202010973891.4A patent/CN112020162A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113916274A (en) * | 2021-10-14 | 2022-01-11 | 深圳市深思泰电子科技有限公司 | Waterproof high temperature resistant sensor |
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