CN2826888Y - Frame type electric heater - Google Patents
Frame type electric heater Download PDFInfo
- Publication number
- CN2826888Y CN2826888Y CN 200520127404 CN200520127404U CN2826888Y CN 2826888 Y CN2826888 Y CN 2826888Y CN 200520127404 CN200520127404 CN 200520127404 CN 200520127404 U CN200520127404 U CN 200520127404U CN 2826888 Y CN2826888 Y CN 2826888Y
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- CN
- China
- Prior art keywords
- porcelain tube
- porcelain
- connecting rod
- external diameter
- ceramic
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- Expired - Fee Related
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Abstract
The utility model relates to a frame type electric heater, which is mainly used for metal heat treatment. The utility model comprises edge frames, connecting rods which are penetrated and filled with ceramic components on the edge frames by a transverse frame, and an electric heating body which is isolated and insulated by the ceramic components. The utility model is characterized in that the connecting rods are penetrated and filled with two-port joints of ceramic pipes, ceramic pipes, and middle joints of the ceramic pipes which exist according to the specific condition; resistor threads which are used as the electric heating body on each connecting rod are wound and penetrated out of the ceramic components in a helical shape; the helical resistor threads among the ceramic components of the contiguous connecting rods are respectively connected in series in a continuous S shape; lengths of the ceramic pipes are one time larger than the lengths of the two-port joints of the ceramic pipes and the middle joints of the ceramic pipes; the middle joints among the ceramic pipes are respectively and alternately connected among the two-port joints of the ceramic pipes in series, and sleeve frames of the ceramic pipes can form larger cavities on the end portions of thin external diameters of the two-port joints of the ceramic pipes or the middle joints of the ceramic pipes and among the ceramic pipes and the connecting rods. The frame type electric heater has high usage temperature; stress of each connecting rod is uniform, and occurrence of the insulation failure condition can be efficiently prevented. The utility model has the advantages of simple structure and easy assembly and maintenance.
Description
Technical field
The utility model belongs to heater, and particularly a kind of postwelding stress relief annealing that is used for all kinds of large pressurized vessels and hardware and various electric heating drying plant and heat treatment furnace are made the frame electric heater of thermal source.
Background technology
The application mode that the frame electric heater is used for all kinds of large pressurized vessels and hardware heating has two kinds: a kind of is to be used for the assembly type resistance furnace, and it is hung on the furnace wall as heat source body; Another kind is the external stove integral annealing that is used for ghost class containers such as spherical tank, jar for sleeping in, is placed on and does heat source body in the container casing, and shell of tank coats insulation with the light-weight refractory heat-insulating material.In addition, the frame electric heater also is used as the thermal source of various electric heating drying plants and heat treatment furnace.
Common in the market frame electric heater is that resistive band is done electric heating element, do not see the frame heater of doing electric heating element with resistance wire as yet, it (sees Fig. 5, hereinafter to be referred as A type heater) be that the channel-section steel of suppressing with carbon steel sheet is a frame, between frame, laterally set up four T font porcelain spare connecting rods and nine porcelain tube connecting rods and constituting ladder shape framework jointly, be connected in series various porcelain spares on the connecting rod, in the groove that resistive band forms around bunchiness T font porcelain spare, and every circle is walked around all T shape porcelain spare connecting rods and is twined.T font porcelain spare is with resistive band and frame, connecting rod and respectively enclose and all keep apart effectively between the resistive band to realize insulation each other when the time comes.Nine porcelain tube connecting rods of the full porcelain tube of outside cover are divided into three rows, three of every rows in order to isolate and compress on the heater before and after two-layerly be close to parallel resistive band, promptly prevented the contact short circuit of two-layer resistive band, do not cause loosening from the groove that T font porcelain spare forms, the jumping out of resistive band to produce short circuit and burn again, in order to normal use.
Yet, but there is following defective in practice in the design of A type heater structure: the one failure of insulation, main cause: (1) high temperature down resistive band of work relax because of the heat expansion elongation, jumps out from the groove of bunchiness T font porcelain spare formation easily, causes the resistive band short circuit and is burnt out.(2) for prevent that resistive band from jumping out from the groove that bunchiness T font porcelain spare forms, it is darker that general groove is done, the external diameter of porcelain spare is bigger, so just increased the weight of porcelain spare, increased the load of porcelain spare connecting rod, when heater is the suspension status use, be positioned on the heater, under the two connecting rods weight that when bearing bunchiness T font porcelain spare weight, also will bear whole resistive bands, thereby be positioned on the heater, under two connecting rods very easily produce flexural deformation, the bending of connecting rod has aggravated the lax of resistive band again conversely, short its spins off from groove, causes vicious circle.(3) nine porcelain tube connecting rods are because of being subjected to the restriction in space, connecting rod is very little with the gap of porcelain tube, porcelain tube is longer relatively again, the bulk oxide skin that swells that produces owing to high-temperature oxydation of the connecting rod of carbon steel manufacturing is difficult in time get rid of the slit between porcelain tube like this, cause the oxidized iron sheet of porcelain tube to burst, thereby cause the frame heater insulation to destroy.Its two weight is big, and serviceability temperature is low, and the life-span is short, poor reliability.
The patent No. is the utility model patent of ZL 02243533.6, disclose a kind of novel frame formula resistive band heater and (seen Fig. 6, hereinafter to be referred as the Type B heater), it is by the rectangular frame of sealing, laterally equidistantly set up several connecting rods in the rectangular frame, and two connecting rods are resistant to bending special-shaped connecting rods wherein, bunchiness connects the porcelain spare that resistive band is sealed in locking respectively on each connecting rod, described porcelain spare is that a middle part has the body that coincide and be connected with connecting rod, body up and down two ends correspondence is provided with the groove of locking sealing resistive band, and the size of groove be porcelain spare with porcelain spare to adorning the groove frame that the is connected in series resistive band of packing into just.
Though the displacement and each other the contact short circuit of resistive band are locked and stoped to the Type B heater effectively, improved the security performance in insulation property, unfailing performance and the use of heater self, alleviated the weight of heater self, but there is following defective in practice: the one complex structure, the manufacturing cost height, main performance: (1) upper and lower two connecting rods are special-shaped connecting rod, and manufacture difficulty is big, the cost height.(2) it is complicated to be through the structure of the porcelain spare that can lock the sealing resistive band on the connecting rod, and intensity is low, and is fragile.The assembling of its two heater and maintenance difficult, the resistive band because the groove size of locking sealing resistive band is packed into just, thereby groove and resistive band some " other strength " during the heater assembling cause the difficulty of assembling.The porcelain spare of its three locking sealing resistive band is broken easily, and reason also is groove and resistive band " other strength ", and the column that leans on rib and body to link together on the porcelain spare produces brittle fracture along root easily.
Above-mentioned technical problem is perplexing the people in the industry, needs to be resolved hurrily.
Summary of the invention
The purpose of this utility model is to overcome the deficiency that exists in the above-mentioned technology, and provide a kind of frame electric heater, it can stop the contact short circuit between the electric heating element effectively, prevent the connecting rod unbalance stress, the situation of stopping failure of insulation takes place, and simple in structure, easy to assembly, make easily and keep in repair.
For achieving the above object, the utility model is realized with following technical scheme: a kind of frame electric heater, by frame, transverse strands is located at some between the frame connecting rods that are arranged in parallel and has constituted it and be the framework of ladder shape, wear full porcelain spare on the connecting rod in order to isolate, the insulated electro hot body, it is characterized in that: wear full on the connecting rod by porcelain tube two end connectors, the combination porcelain spare that the porcelain tube transition joint that porcelain tube exists with looking concrete condition is formed, on each connecting rod as the resistance wire of electric heating element in the shape of a spiral shape twine the outside that is set on the combination porcelain spare between porcelain tube two end connectors, and spiral resistance wire is continuous S shape and is connected in series successively between the porcelain spare of adjacent connecting rod; Described porcelain tube two end connectors are ring bodies of the stepped variation of a kind of external diameter, it has two external diameters of thickness, its thick external diameter is equivalent to the formed spirochetal external diameter of spiral resistance wire to stop resistance wire and frame contact short circuit effectively, the internal diameter of its thin external diameter and porcelain tube matches so that easily insert in the porcelain tube hole thin external diameter end, and its endoporus and connecting rod match and make porcelain tube two ends fitting sleeve on connecting rod; Described porcelain tube transition joint is a kind of endoporus and the identical ring bodies of porcelain tube two end connector endoporus, symmetry was step-like in the middle of the variation of its external diameter was, the middle part external diameter slightly and with the porcelain tube external diameter equates, the two ends external diameter is thin and identical with the thin external diameter of porcelain tube two end connectors, in the time only a porcelain tube need being arranged on the connecting rod, do not use the porcelain tube transition joint, when two and plural porcelain tube are arranged on the connecting rod, just use supporting porcelain tube transition joint; The length of described porcelain tube is twice above than the length of porcelain tube two end connectors and porcelain tube transition joint, porcelain tube two end connectors are distributed in two ends, porcelain tube and look concrete condition and alternate successively being serially connected between two porcelain tube two end connectors of porcelain tube transition joint that exist, the porcelain tube stock forms a bigger cavity on the thin external diameter end of porcelain tube two end connectors or porcelain tube transition joint and between porcelain tube and connecting rod.
Preferably, the connecting rod cross section is circular.
Preferably, porcelain tube two end connector profiles generally are the T font.
Preferably, porcelain tube transition joint profile generally is cross.
Preferably, frame, connecting rod and other all metal parts are all made by heat resisting steel or heat-resisting alloy.
By the utility model, improved in non-oxidizability, insulation property, reliability and the use of heater self the security appliance performance of self, reduced failure rate, prolonged useful life.Change the shape of electric heating element, improved the serviceability temperature of heater.Improved the structure of insulating porcelain piece, connecting rod and electric heating element, fundamentally overcome the connecting rod unbalance stress, gone up the stressed excessive defective of (descend) connecting rod, make the heater manufacturing, use and maintenance is more convenient, easy.Further alleviate the weight of various parts, make heater lighter, flexible, energy-conservation.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the end view of Fig. 1;
Fig. 3 is the A-A cutaway view of Fig. 1;
Fig. 4 is the partial enlarged drawing of Fig. 3;
Fig. 5 is the structural representation of A type heater;
Fig. 6 is the structural representation of Type B heater.
Among the figure: 5 bundle silks, 6 diplopore porcelain spares, 7 porcelain tubes, two end connectors, 8 porcelain tube transition joints, 9 porcelain tubes, 10 resistance wires, 11 frames, 13 connecting rods, 16 nuts, 18 cavitys.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, embodiment, structure, feature and effect thereof that foundation the utility model is provided further specify the utility model, but the utility model is not limited to this.
See also shown in Fig. 1～4, a kind of frame electric heater laterally parallelly in the frame 11 that 2mm heat resisting steel is made sets up cross section that several heat resisting steel make for circular connecting rod 13, has constituted it by frame 11 and connecting rod 13 and has been the framework of ladder shape.Wear the full combination porcelain spare of forming by porcelain tube two end connectors 7, porcelain tube 9 and porcelain tube transition joint 8 on the connecting rod 13, the resistance wire 10 shape outside of twining the combination porcelain spare be set on 7 of porcelain tube two end connectors in the shape of a spiral on each connecting rod, and spiral resistance wire 10 is continuous S shape and is connected in series successively between the porcelain spare of adjacent connecting rod, and resistance wire is fixed by the bundle silk 5 on the diplopore porcelain spare 6.Described porcelain tube two end connectors 7 profiles generally are the T font, it is the ring bodies of the stepped variation of a kind of external diameter, it has two external diameters of thickness, its thick external diameter is equivalent to spiral resistance wire 10 formed spirochetal external diameters to stop resistance wire and frame 11 contact short circuits effectively, the internal diameter of its thin external diameter and porcelain tube 9 matches so that easily insert in porcelain tube 9 holes thin external diameter end, and its endoporus and connecting rod 13 match and make porcelain tube two ends fitting sleeve on connecting rod.Described porcelain tube transition joint 8 profiles generally are cross, be a kind of endoporus and the identical ring bodies of porcelain tube two end connectors, 7 endoporus, symmetry was step-like in the middle of the variation of its external diameter was, and the middle part external diameter equates that slightly and with porcelain tube 9 external diameters the two ends external diameter is thin and identical with the thin external diameter of porcelain tube two end connectors 7.More than the big twice of length of the length of described porcelain tube 9 than porcelain tube two end connectors 7 and porcelain tube transition joint 8, porcelain tube two end connectors 7 are distributed in two ends, porcelain tube 9 and porcelain tube transition joint 8 are alternate successively to be serially connected between two porcelain tubes, two end connectors 7, and porcelain tube 9 stocks form a bigger cavity 18 on the thin external diameter end of porcelain tube two end connectors 7 or porcelain tube transition joint 8 and between porcelain tube and connecting rod.Connecting rod 13 is the turret head stay bolt, and is equipped with nut 16 by frame 11.
Compared with prior art, the utility model is producing following beneficial effect under the structural arrangements of excellence: since porcelain tube two end connectors 7 and porcelain tube transition joint 8 with 9 of porcelain tubes get up to make between tubulose combination porcelain spare and the connecting rod and formed a bigger cavity 18, this cavity is enough to hold the oxide skin that connecting rod produces because of high-temperature oxydation, make porcelain tube avoid the danger of being burst, improved insulating properties, reliability and the useful life of heater; The shape of spiral resistance wire, structure and fixed form change A type heater and the stressed big state of upper and lower two connecting rods of Type B heater bent, make the simple in structure, unified, stressed even of all connecting rods, and assembling easily, for ease of maintenaince, fundamentally guaranteed the good insulation and the operate as normal of electric heating element; Because frame 11 and connecting rod 13 all use the heat resisting steel high temperature resistant, anti-oxidant, that calorific intensity is high to replace ordinary carbon steel, not only improved heater high-temperature oxidation resistance, improved serviceability temperature and life-span but also can reduce the consumption of metal material significantly; All porcelain spares have carried out significant improvement on planform and specification in addition, and are simpler than the porcelain spare structure of A, B amphitypy heater, and volume weight is reduced, thus make that the heater overall structure is more firm, light, flexible and convenient to use, the life-span prolongs.
The above, it only is preferred embodiment of the present utility model, be not that shape of the present utility model and structure are done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.
Claims (4)
1, a kind of frame electric heater, by frame, transverse strands is located at some between the frame connecting rods that are arranged in parallel and has constituted it and be the framework of ladder shape, wear full porcelain spare on the connecting rod in order to isolate, the insulated electro hot body, it is characterized in that: wear full on the connecting rod by porcelain tube two end connectors, the combination porcelain spare that the porcelain tube transition joint that porcelain tube exists with looking concrete condition is formed, on each connecting rod as the resistance wire of electric heating element in the shape of a spiral shape twine the outside that is set on the combination porcelain spare between porcelain tube two end connectors, and spiral resistance wire is continuous S shape and is connected in series successively between the porcelain spare of adjacent connecting rod; Described porcelain tube two end connectors are ring bodies of the stepped variation of a kind of external diameter, it has two external diameters of thickness, its thick external diameter is equivalent to the formed spirochetal external diameter of spiral resistance wire to stop resistance wire and frame contact short circuit effectively, the internal diameter of its thin external diameter and porcelain tube matches so that easily insert in the porcelain tube hole thin external diameter end, and its endoporus and connecting rod match and make porcelain tube two ends fitting sleeve on connecting rod; Described porcelain tube transition joint is a kind of endoporus and the identical ring bodies of porcelain tube two end connector endoporus, symmetry was step-like in the middle of the variation of its external diameter was, the middle part external diameter slightly and with the porcelain tube external diameter equates, the two ends external diameter is thin and identical with the thin external diameter of porcelain tube two end connectors, in the time only a porcelain tube need being arranged on the connecting rod, do not use the porcelain tube transition joint, when two and plural porcelain tube are arranged on the connecting rod, just use supporting porcelain tube transition joint; The length of described porcelain tube is twice above than the length of porcelain tube two end connectors and porcelain tube transition joint, porcelain tube two end connectors are distributed in two ends, porcelain tube and look concrete condition and alternate successively being serially connected between two porcelain tube two end connectors of porcelain tube transition joint that exist, the porcelain tube stock forms a bigger cavity on the thin external diameter end of porcelain tube two end connectors or porcelain tube transition joint and between porcelain tube and connecting rod.
2, according to claim 1 described frame electric heater, it is characterized in that: described porcelain tube two end connector profiles generally are the T font.
3, according to claim 1 described frame electric heater, it is characterized in that: described porcelain tube transition joint profile generally is cross.
4, according to claim 1 described frame electric heater, it is characterized in that: frame, connecting rod and other all metal parts are all made by heat resisting steel or heat-resisting alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520127404 CN2826888Y (en) | 2005-10-12 | 2005-10-12 | Frame type electric heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520127404 CN2826888Y (en) | 2005-10-12 | 2005-10-12 | Frame type electric heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2826888Y true CN2826888Y (en) | 2006-10-11 |
Family
ID=37067072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520127404 Expired - Fee Related CN2826888Y (en) | 2005-10-12 | 2005-10-12 | Frame type electric heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2826888Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102300342A (en) * | 2010-06-24 | 2011-12-28 | 北京北方微电子基地设备工艺研究中心有限责任公司 | Support plate heating device and plasma processor using same |
| CN102419101A (en) * | 2011-08-18 | 2012-04-18 | 西安奥杰电热设备工程有限责任公司 | Optimized ternary aviation resistance furnace heater |
-
2005
- 2005-10-12 CN CN 200520127404 patent/CN2826888Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102300342A (en) * | 2010-06-24 | 2011-12-28 | 北京北方微电子基地设备工艺研究中心有限责任公司 | Support plate heating device and plasma processor using same |
| CN102419101A (en) * | 2011-08-18 | 2012-04-18 | 西安奥杰电热设备工程有限责任公司 | Optimized ternary aviation resistance furnace heater |
| CN102419101B (en) * | 2011-08-18 | 2016-06-15 | 西安奥杰电热设备工程有限责任公司 | A kind of ternary aviation resistance furnace heater of optimization |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061011 Termination date: 20131012 |