CN201937860U - Anti-explosion single-end lead-out wire electric heater - Google Patents

Anti-explosion single-end lead-out wire electric heater Download PDF

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Publication number
CN201937860U
CN201937860U CN2010206578953U CN201020657895U CN201937860U CN 201937860 U CN201937860 U CN 201937860U CN 2010206578953 U CN2010206578953 U CN 2010206578953U CN 201020657895 U CN201020657895 U CN 201020657895U CN 201937860 U CN201937860 U CN 201937860U
Authority
CN
China
Prior art keywords
explosion
proof
electric heater
metal body
out wire
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.)
Expired - Lifetime
Application number
CN2010206578953U
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Chinese (zh)
Inventor
董国俊
王建萍
薛宇飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZHENJIANG DONGFANG ELECTRIC HEATING CO Ltd
Original Assignee
ZHENJIANG DONGFANG ELECTRIC HEATING CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ZHENJIANG DONGFANG ELECTRIC HEATING CO Ltd filed Critical ZHENJIANG DONGFANG ELECTRIC HEATING CO Ltd
Priority to CN2010206578953U priority Critical patent/CN201937860U/en
Application granted granted Critical
Publication of CN201937860U publication Critical patent/CN201937860U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to an electric heating device, in particular to an anti-explosion single-end lead-out wire electric heater, which comprises a metal pipe body, wherein one end of the metal pipe body is encapsulated, a pair of metal electricity conduction and heat conduction bodies in a semi-cylindrical shape are inserted into the metal pipe body, a plurality of positive temperature coefficient (PTC) heating sheets which are arranged at intervals are clamped between opposite planes of the two semi-cylindrical metal electricity conduction and heat conduction bodies, an insulation film is covered on the outer cylinder surfaces of one pair of metal electricity conduction and heat conduction bodies, heat conduction insulation media are filled between the insulation film and the inner wall of the metal pipe body, the two metal electricity conduction bodies are respectively connected with one lead-out electrode rod, a grounding rod is connected onto the metal pipe body, and the two lead-out electrode rods and one grounding rod are respectively connected with a power supply core wire at the opening end of the metal pipe body. The electric heater has the advantages of compact structure, good heat radiation effect and strong anti-explosion capability, and the automatic temperature control can be realized.

Description

Explosion-proof single-ended lead-out wire electric heater
Technical field
The utility model relates to a kind of electric heater unit, specifically is a kind of explosion-proof single-ended lead-out wire electric heater.
Background technology
Usually, the tubular electric heating of single-ended outlet (single-ended electric heating tube) is used to be installed in the position or structure is not easy to the occasion that the electric heating tube two ends go between, and its design feature is the sealing of electric heating tube one end, and the other end is drawn positive and negative the two poles of the earth power supply wiring simultaneously.Because this design feature, single-ended tubular electric heating is suitable for the medium heating under can only the particular restriction structural condition of an end power supply wiring, as close join to be positioned in the blind hole metal solid is heated.Simultaneously, because this design feature, the one, make to be difficult to design blast resistance construction, can not be used for the explosive gas atmosphere place; The 2nd, there is not the radiator structure that strengthens, be not suitable for gas (as air) heating; The 3rd, pipe internal heat generation element is the electric resistance silk, can not A.T.C.For safety, heating reliably, single-ended tubular electric heating must dispose temperature control circuitry and temperature control device.This has just restricted the application of single-ended tubular electric heating in suitable place greatly.
Summary of the invention
Technical problem to be solved in the utility model is, provide a kind of compact conformation, good heat dissipation effect, flame proof ability strong, can realize the temperature explosion-proof single-ended lead-out wire electric heater of control automatically.
Single-ended lead-out wire electric heating tube of the present utility model includes the metal body of one one end encapsulation, metal body interpolation has a pair of semi-cylindrical metallic conduction heat carrier that is, clamping has the PTC heating sheet of spaced a plurality of positive temperature coefficients between the relative plane of two half-cylindrical metallic conduction heat carriers, the external cylindrical surface of pair of metal conductive and heat-conductive body is enclosed with dielectric film, is filled with the heat conductive insulating medium between dielectric film and the metal inboard wall of tube body; Two metallic conduction heat carriers respectively connect an extraction electrode rod, are connected with an earth rod on the metal body, and two extraction electrode rods are connected the power supply heart yearn with an earth rod respectively at the openend of metal body.
Have elongated slot longitudinally on the face of cylinder at the described metallic conduction heat carrier back side, described extraction electrode rod is embedded in the elongated slot.
Described metal body is installed in the installing hole on the housing, and housing is provided with the radiator with the housing integrative-structure, and radiator is provided with a plurality of heat radiation ribs.
Described power supply heart yearn has one section and is wrapped in the insulating barrier, the insertion end of the installing hole on the described housing is inserted and is fixed with an explosion-proof cylindrical shell, one section internal thread is set on the explosion-proof cylinder inboard wall, there is a swivel nut to be connected with screw-internal thread fit on the explosion-proof cylindrical shell by external screw thread, the power supply heart yearn of described tape insulation layer passes from the centre bore of swivel nut, be pressed with elasticity or flexible obturator around the power supply heart yearn of tape insulation layer between the limited step in the inner side end of described swivel nut and the explosion-proof cylindrical shell endoporus, this obturator tightly encases the power supply heart yearn of tape insulation layer.
The utility model has the advantages that:
1, adopt the PTC with ptc characteristics to generate heat sheet as heater element, when being warming up to uniform temperature, resistance sharply increases, and power significantly reduces, and realizes A.T.C, and energy efficient is safe and reliable.
2, under the steady operation condition, utilize the heat generation characteristic of ptc material, improve wind speed, heater power increases automatically, strengthens heating efficiency.
3, the radiator of band heat radiation rib is set on housing, and good heat dissipation effect is fit to the heating to gaseous medium, particularly is fit to the heating to the gaseous medium of certain flowing velocity (wind speed).
4, have the easy blast resistance construction of adjustment, heater is applicable to the occasion of explosive gas atmosphere.
5, easy for installation, structure is light and handy, and is with low cost.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the end face structure for amplifying schematic diagram of a metallic conduction heat carrier of the present utility model and extraction electrode rod;
Fig. 3 is the example structure schematic diagram that the utility model has housing;
Fig. 4 is the plan structure schematic diagram of Fig. 3;
Fig. 5 be the A of Fig. 3 local anti-(every) quick-fried structure enlarged diagram.
Embodiment
As shown in Figure 1, this single-ended lead-out wire electric heating tube includes the metal body 1 of one one end encapsulation, metal body interpolation has a pair of metallic conduction heat carrier 2 that is the semicircular cylindricality, clamping has the PTC heating sheet 3 of a plurality of positive temperature coefficients of arranged in series at interval between the relative plane of two half-cylindrical metallic conduction heat carriers, the external cylindrical surface of metallic conduction heat carrier 2 is enclosed with dielectric film 5, is filled with heat conductive insulating medium 4 between dielectric film 5 and metallic conduction heat carrier 2 and metal body 1 inwall; Two metallic conductors respectively connect an extraction electrode rod 6, are connected with 7, two extraction electrode rods of an earth rod on the metal body and are connected power supply heart yearn 8 with an earth rod respectively at the openend of metal body.The connected mode of extraction electrode rod 6 and metallic conductor 2 promptly, has elongated slot 17 longitudinally as shown in Figure 2 on the face of cylinder at metallic conductor 2 back sides, extraction electrode rod 5 is embedded in the elongated slot, and can make that the extraction electrode rod is fixing by the riveting trough rim.
As shown in Figure 3, Figure 4, metal body 1 is installed in the installing hole 10 on the housing 9, and housing is provided with the radiator 11 with the housing integrative-structure, and radiator is provided with a plurality of heat radiation ribs 12.
Power supply heart yearn 7 has one section and is wrapped in the insulating barrier 13, the insertion end of the installing hole 10 on the housing is embedded with or is threaded into an explosion-proof cylindrical shell 14, one section internal thread is set on the explosion-proof cylinder inboard wall, there is a swivel nut 15 to be connected with screw-internal thread fit on the explosion-proof cylindrical shell by external screw thread, insulated tube 13 passes from the centre bore of swivel nut 15, is pressed with elasticity or flexible obturator 16 around insulating barrier between the limited step in the inner side end of swivel nut 15 and explosion-proof cylindrical shell 14 endoporus.When swivel nut inwardly screws in, its end extruding elasticity or flexible obturator make obturator to inside and outside expansion, with insulated tube outer wall and explosion-proof vent inwall fluid-tight engagement, thereby can prevent that the arc spark that inner conductive tie point place produces from leaking, reach anti-(every) quick-fried effect.

Claims (5)

1. explosion-proof single-ended lead-out wire electric heater, include the metal body (1) of one one end encapsulation, it is characterized in that: metal body interpolation has a pair of semi-cylindrical metallic conduction heat carrier (2) that is, clamping has the PTC heating sheet (3) of spaced a plurality of positive temperature coefficients between the relative plane of two half-cylindrical metallic conduction heat carriers, the external cylindrical surface of metallic conduction heat carrier (2) is enclosed with dielectric film (5), be filled with heat conductive insulating medium (4) between dielectric film (5) and metal body (1) inwall, two metallic conductors respectively connect an extraction electrode rod (6), be connected with an earth rod (7) on the metal body, two extraction electrode rods are connected power supply heart yearn (8) with an earth rod respectively at the openend of metal body.
2. explosion-proof single-ended lead-out wire electric heater according to claim 1 is characterized in that: have elongated slot (17) longitudinally on the face of cylinder at metallic conduction heat carrier (2) back side, extraction electrode rod (6) is embedded in the elongated slot.
3. explosion-proof single-ended lead-out wire electric heater according to claim 1 and 2 is characterized in that: metal body (1) is installed in the installing hole (10) on the housing (9).
4. explosion-proof single-ended lead-out wire electric heater according to claim 3 is characterized in that: housing (9) is provided with the radiator (11) with the housing integrative-structure, and radiator is provided with a plurality of heat radiation ribs (12).
5. explosion-proof single-ended lead-out wire electric heater according to claim 3, it is characterized in that: power supply heart yearn (7) has one section and is wrapped in the insulating barrier (13), the insertion end of the installing hole on the housing (10) is embedded with an explosion-proof cylindrical shell (14), one section internal thread is set on the explosion-proof cylinder inboard wall, there is a swivel nut (15) to be connected with screw-internal thread fit on the explosion-proof cylindrical shell by external screw thread, the power supply heart yearn of tape insulation layer (13) passes from the centre bore of swivel nut (15), is pressed with elasticity or flexible obturator (16) around insulating barrier between the limited step in the inner side end of swivel nut (15) and explosion-proof cylindrical shell (14) endoporus.
CN2010206578953U 2010-12-14 2010-12-14 Anti-explosion single-end lead-out wire electric heater Expired - Lifetime CN201937860U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010206578953U CN201937860U (en) 2010-12-14 2010-12-14 Anti-explosion single-end lead-out wire electric heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010206578953U CN201937860U (en) 2010-12-14 2010-12-14 Anti-explosion single-end lead-out wire electric heater

Publications (1)

Publication Number Publication Date
CN201937860U true CN201937860U (en) 2011-08-17

Family

ID=44449361

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010206578953U Expired - Lifetime CN201937860U (en) 2010-12-14 2010-12-14 Anti-explosion single-end lead-out wire electric heater

Country Status (1)

Country Link
CN (1) CN201937860U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103369748A (en) * 2013-07-25 2013-10-23 吴让攀 Electric heating pipe for heating liquid
WO2015184766A1 (en) * 2014-06-03 2015-12-10 上海帕克热敏陶瓷有限公司 Ventilation-type ptc heater

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103369748A (en) * 2013-07-25 2013-10-23 吴让攀 Electric heating pipe for heating liquid
CN103369748B (en) * 2013-07-25 2016-09-07 吴让攀 A kind of electrothermal tube for adding hot liquid
WO2015184766A1 (en) * 2014-06-03 2015-12-10 上海帕克热敏陶瓷有限公司 Ventilation-type ptc heater

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GR01 Patent grant
CX01 Expiry of patent term

Granted publication date: 20110817

CX01 Expiry of patent term