CN213661996U - Intermediate frequency heating device suitable for heating special-shaped thick-wall end socket - Google Patents
Intermediate frequency heating device suitable for heating special-shaped thick-wall end socket Download PDFInfo
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- CN213661996U CN213661996U CN202022201492.4U CN202022201492U CN213661996U CN 213661996 U CN213661996 U CN 213661996U CN 202022201492 U CN202022201492 U CN 202022201492U CN 213661996 U CN213661996 U CN 213661996U
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Abstract
The utility model discloses an intermediate frequency heating device suitable for take over heating for dysmorphism, this intermediate frequency heating device include cladding at outside air cooling intermediate frequency cable layer (100) of dysmorphism thick wall head and intermediate frequency power (6), air cooling intermediate frequency cable layer (100) are including tip air cooling intermediate frequency cable one (1), tip air cooling intermediate frequency cable two (2), and take over air cooling intermediate frequency cable one (3) greatly, take over air cooling intermediate frequency cable two (4) greatly, fifth air cooling intermediate frequency cable (5). This heating device can be through the unique winding method of intermediate frequency heating cable, and the temperature everywhere of special-shaped thick wall head is controlled to the accurate, not only realizes that the temperature is controllable alone, and heating efficiency is high, directly heats special-shaped thick wall head through electromagnetic induction's mode.
Description
Technical Field
The utility model belongs to the technical field of pressure vessel makes and specifically relates to china's nuclear power design institute design hualong steam generator makes the field, preheats back thermal treatment to dysmorphism thick wall head during the build-up welding of concretely relates to dysmorphism thick wall head inner wall.
Background
"Hualongyi" is an advanced million kilowatt-level pressurized water reactor nuclear power technology developed by China nuclear industry group companies (abbreviated as Zhongke and CNNC) and China Guanghui group (abbreviated as Zhongguang and CGN) of two nuclear power enterprises in China on the basis of 30 years nuclear power scientific research, design, manufacture, construction and operation experience in China and according to Fudao nuclear accident experience feedback and the latest safety requirements in China and the world.
As a main brand for Chinese nuclear power 'going away', in the aspect of design innovation, 'Hualong I' proposes a safety design concept of 'active and passive combination', adopts a reactor core of 177 fuel assemblies, a multiple redundant safety system, single-reactor arrangement and double-layer containment vessels, comprehensively and evenly implements the design principle of 'deep defense', sets perfect serious accident prevention and mitigation measures, and has safety indexes and technical performance reaching the advanced level of the international third-generation nuclear power technology and complete independent intellectual property rights.
In the manufacturing process of a pressure container, particularly a 'Hualong I' steam generator, the inner wall of a special-shaped thick-wall seal head at one side of the pressure container needs to be overlaid with a stainless steel layer. Before welding, in order to prevent the generation of welding hot cracks, a workpiece to be welded needs to be heated to above room temperature, and preheating is required before and after welding, so that heating of the special-shaped thick-wall end socket is indispensable. But because "hualong No. one" steam generator's dysmorphism thick wall head itself is very big, and the wall thickness is very thick, and the flame heating mode not only heating efficiency is low originally, and ambient temperature is high, brings the discomfort for operating personnel, and the equipment is burnt out easily to flame moreover, and flame heating forms the carbon deposit easily, causes the influence to the quality of product.
Because the large opening end of the special-shaped thick-wall end socket is arranged on the positioner in an upward mode, the inner wall of the special-shaped thick-wall end socket is welded through linkage of the welding manipulator and the positioner. If the traditional infrared heating method is adopted, the profiling tool is troublesome to manufacture, low in universality and high in manufacturing cost. Therefore, in order to solve the problem of enabling the special-shaped thick-wall end socket to be heated quickly, the special-shaped thick-wall end socket is heated directly in an electromagnetic induction mode by focusing attention on medium-frequency heating, and the heating efficiency is high. The arrangement of the medium-frequency heating cable and the form of the heating tool can be various forms according to the conventional principle, but the arrangement mode of the heating cable is very troublesome because various projections such as an outlet connecting pipe, an inlet connecting pipe, a manhole, a supporting platform, a lifting lug and the like are arranged on the special-shaped thick-wall sealing head. The inventor specially develops the heating method according to the distribution condition of the electromagnetic field generated by the medium-frequency cable through a plurality of experiments.
Because of the above reason, the utility model relates to a provide an intermediate frequency heating device suitable for heating of dysmorphism thick wall head, this kind of device is preheated the back heat and is belonged to the first application by special-shaped thick wall head inner wall build-up welding under nuclear power steam generator.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above problem, the inventor has carried out the research of keen interest, designs an intermediate frequency heating device suitable for special-shaped thick wall head heating, and this heating device can not only realize that the temperature is controllable alone through the winding method that intermediate frequency heating cable is unique, temperature everywhere of accurate control special-shaped thick wall head, and heating efficiency is high, directly heats special-shaped thick wall head through electromagnetic induction's mode, thereby accomplishes the utility model discloses a temperature control system is provided.
Particularly, the utility model aims at providing an intermediate frequency heating device suitable for heat for dysmorphism thick wall head, its characterized in that, this intermediate frequency heating device includes cladding air cooling intermediate frequency cable layer 100 and intermediate frequency power 6 outside dysmorphism thick wall head, air cooling intermediate frequency cable layer 100 includes tip air cooling intermediate frequency cable 1, tip air cooling intermediate frequency cable two 2, big takeover air cooling intermediate frequency cable one 3, big takeover air cooling intermediate frequency cable two 4 and fifth air cooling intermediate frequency cable 5;
two ends of the end part air-cooled intermediate frequency cable I1, the end part air-cooled intermediate frequency cable II 2, the large connecting pipe air-cooled intermediate frequency cable I3, the large connecting pipe air-cooled intermediate frequency cable II 4 and the fifth air-cooled intermediate frequency cable 5 are respectively connected with an intermediate frequency power supply 6;
the plurality of intermediate frequency power supplies 6 are arranged, and the power of the large opening end of the special-shaped thick-wall end socket, the power of the area around the large connecting pipe and the power of the other areas of the cable layer are respectively controlled by outputting different intermediate frequency currents, so that the temperature is controlled;
a heat insulation isolation layer 7 is further arranged between the special-shaped thick-wall end socket and the air-cooled intermediate frequency cable layer, and the air-cooled intermediate frequency cable layer is isolated from the special-shaped thick-wall end socket through the heat insulation isolation layer 7;
the intermediate frequency heating device is also provided with an auxiliary bracket 8;
the blocking device 9 is further arranged on the outer side of the large opening port of the special-shaped thick-wall end socket and used for preventing the end air-cooled intermediate frequency cable I1 and the end air-cooled intermediate frequency cable II 2 from interfering with each other during heating.
The end part air-cooled intermediate frequency cable I1 is tightly wound around the large opening port of the special-shaped thick-wall end socket in a single layer;
the end part air-cooled intermediate frequency cable II 2 is tightly wound around the surrounding area of the large opening end of the special-shaped thick-wall end socket in a single layer;
the single-layer tight winding is a winding mode that the cables are not overlapped or crossed in the winding process;
the large-connecting-pipe air-cooled medium-frequency cable I3 is wound around the single-layer mosquito-repellent incense in the large connecting pipe area of the special-shaped thick-wall end socket;
a large connecting pipe air-cooled intermediate frequency cable II 4 is wound around the single-layer mosquito-repellent incense shape of the area around the large connecting pipe of the special-shaped thick-wall end socket;
and the fifth air-cooled intermediate frequency cable 5 is uniformly wound in a single layer in other areas of the special-shaped thick-wall end socket air-cooled intermediate frequency cable layer and is not crossed or overlapped with other cables.
The number of winding turns of the end part air-cooled intermediate frequency cable I1, the end part air-cooled intermediate frequency cable II 2, the large-joint-pipe air-cooled intermediate frequency cable I3, the large-joint-pipe air-cooled intermediate frequency cable II 4 and the fifth air-cooled intermediate frequency cable 5 is 3-5.
And an auxiliary support 8 is also arranged on the intermediate frequency heating device.
The auxiliary support 8 encircles and withholds on air cooling intermediate frequency cable layer, through auxiliary support 8 will air cooling intermediate frequency cable layer is fixed on special-shaped thick wall sealing head.
And a heat insulation paste layer is arranged on one side of the auxiliary support 8 close to the air-cooled intermediate frequency cable layer.
The auxiliary support 8 comprises a non-closed, ring-like ring made of flat steel bars, or the auxiliary support 8 comprises a closed ring made of an insulating material.
The blocking device 9 is a closed conductor in the shape of a ring.
The large opening end of the special-shaped thick-wall end socket is upwards arranged on the positioner through a support frame, and the intermediate frequency power supply 6 is arranged on the table top of the positioner.
The utility model discloses the beneficial effect who has includes:
(1) according to the utility model provides an intermediate frequency heating device, through 5 intermediate frequency cable's winding mode, winding position, winding number of turns and the winding density condition, ensures that special-shaped thick wall head temperature everywhere is controllable alone, and can be accurate to within 30 ℃.
(2) According to the utility model provides an intermediate frequency heating device, the utility model discloses a flat billet passes through the cotton direct subsides of heat preservation and on intermediate frequency cable and heat preservation to consolidate through the form of electric welding, it consolidates fastly, is difficult to drop, also enables heating cable and closely laminates with special-shaped thick wall head all the time (otherwise heating temperature is uncontrollable).
(3) According to the utility model provides an intermediate frequency heating device links to each other with different intermediate frequency power through 5 different winding methods and the air cooling intermediate frequency cable of winding in the different positions of dysmorphism thick wall head, realizes the accurate control of each air cooling intermediate frequency cable's power to reach the effect of each regional temperature of accurate control dysmorphism thick wall head. The reliability of the process was verified by a series of checks.
(4) According to the utility model provides an intermediate frequency heating method, to the large-scale special-shaped thick wall head of thick wall and design, can special-shaped thick wall head big mouth end up or towards any angle, install and heat special-shaped thick wall head on the machine of shifting, with realize special-shaped thick wall head inner wall build-up welding, it is wide to have a heating temperature scope, heating temperature is even, can preheat and the afterheat, structural design is novel, simple to operate, therefore, the clothes hanger is strong, and compare with flame heating, heating efficiency is high, the very big energy can be saved, and the working environment is improved.
Drawings
Fig. 1 is a schematic diagram showing the overall structure of a medium-frequency heating device suitable for heating a special-shaped thick-wall end socket according to a preferred embodiment of the invention;
fig. 2 shows a side view of the overall structure of a medium-frequency heating device suitable for heating a special-shaped thick-wall end socket according to a preferred embodiment of the invention;
fig. 3 shows a schematic partial cross-sectional view of a profiled thick-walled end enclosure outer wall, insulation and isolation layer, air-cooled intermediate frequency cable layer and auxiliary support according to a preferred embodiment of the present invention;
the reference numbers illustrate:
100-air-cooling intermediate frequency cable layer
1-end air-cooled intermediate frequency cable 1
2-end air-cooled intermediate frequency cable II
3-large connecting pipe air cooling intermediate frequency cable one
4-large connecting pipe air cooling intermediate frequency cable II
5-fifth air cooling intermediate frequency cable
6-intermediate frequency power supply
7-insulating barrier layer
8-auxiliary support
9-blocking device
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. The features and advantages of the present invention will become more apparent from the description.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
According to the utility model provides an intermediate frequency heating device suitable for heating of dysmorphism thick wall head, as shown in fig. 1-3, this intermediate frequency heating device includes cladding at the outside air cooling intermediate frequency cable layer 100 of dysmorphism thick wall head and intermediate frequency power supply 6, air cooling intermediate frequency cable layer 100 includes tip air cooling intermediate frequency cable 1, tip air cooling intermediate frequency cable two 2, and big takeover air cooling intermediate frequency cable 3, big takeover air cooling intermediate frequency cable two 4, fifth air cooling intermediate frequency cable 5.
The end part air-cooled intermediate frequency cable I1, the end part air-cooled intermediate frequency cable II 2, the large connecting pipe air-cooled intermediate frequency cable I3, the large connecting pipe air-cooled intermediate frequency cable II 4 and the fifth air-cooled intermediate frequency cable 5 are respectively connected with the intermediate frequency power supply 6 at two ends.
In a preferred embodiment, the five cables are respectively wound on different areas of the special-shaped thick-wall end socket, and the density is moderate.
Different areas can be controllably and adjustably heated by the electromagnetic induction mode, the temperature of each area of the special-shaped thick-wall end socket is controllable at 50-350 ℃, and the temperature difference of the heating temperature is guaranteed within 30 ℃.
In a preferred embodiment, the first end air-cooled intermediate frequency cable 1 is tightly wound around the single layer of the large opening end of the special-shaped thick-wall end socket, so that the temperature of the large opening end of the special-shaped thick-wall end socket which is most difficult to heat can meet the requirement (because the deformation preventing device is located on the outermost side of the large opening end of the end socket, the temperature of the deformation preventing device is quickly dissipated, and the temperature of the joint of the deformation preventing device and the end socket is also taken into consideration).
The large opening end of the special-shaped thick-wall end socket is large in area and fast in heat dissipation, and the winding mode of single-layer tight winding can reduce electromagnetic energy loss, enhance electromagnetic force, reduce inter-turn friction of a coil caused by vibration during power-on, reduce damage of an insulating layer and prolong the service life of a cable.
The end part air-cooled intermediate frequency cable II 2 is tightly wound (separated by a blocking device in the middle) around the large opening end of the special-shaped thick-wall end socket and the air-cooled intermediate frequency cable I1 in a parallel single layer mode, and the purpose is to heat the middle part of the large opening end of the special-shaped thick-wall end socket.
The deformation prevention device for the special-shaped thick-wall end socket is a necessary device for preventing the special-shaped thick-wall end socket from deforming during heat treatment, can ensure that the heat treatment of the special-shaped thick-wall end socket is finished according to quality, and cannot influence the whole process flow.
The large-connecting-pipe air-cooled intermediate frequency cable I3 is wound around a single-layer mosquito-repellent incense shape in a large connecting pipe area of the special-shaped thick-wall end socket, and the large-connecting-pipe air-cooled intermediate frequency cable II 4 is wound around a single-layer mosquito-repellent incense shape in a surrounding area of the large connecting pipe of the special-shaped thick-wall end socket, so that the large connecting pipe area of the special-shaped thick-wall end socket and the surrounding area of the large connecting pipe close to the large.
Fifth air cooling intermediate frequency cable 5 is in the even individual layer winding of special-shaped thick wall head air cooling intermediate frequency cable layer other region, and does not intersect or overlap with other cables, and its purpose is that the other positions except that big takeover and tip on making special-shaped thick wall head surface are the even heating, including each hole site and other regions of special-shaped thick wall head to guarantee that the holistic temperature of special-shaped thick wall head reaches the requirement, can not cause equipment to damage because of subcooling or overheated.
In a preferred embodiment, the five cables in the air-cooled midrange cable layer 100 are wound for 3-5 turns.
Still be provided with heat preservation isolation layer 7 between dysmorphism thick wall head and the air cooling intermediate frequency cable layer, keep apart air cooling intermediate frequency cable layer and dysmorphism thick wall head through heat preservation isolation layer 7.
The heat preservation isolation layer 7 has the heat preservation effect and the high temperature resistant effect simultaneously to have certain solidity, can keep warm to special-shaped thick wall head outer wall well, and can keep apart air cooling intermediate frequency cable and high temperature's special-shaped thick wall head.
Preferably, the five kinds of medium-frequency air-cooled cables are wound outside the heat-insulating isolation layer 7 for 3-5 turns, so that the inductance generated by the cables is in a required range, and the resonance frequency of the cables is ensured to be in a range of 5kHz to 13kHz when the cables work together with the medium-frequency power supply 6.
Simultaneously, five kinds of intermediate frequency air cooling cables of heat preservation isolation layer 7 outside winding can reach and carry out the intermediate frequency heating to the thick special-shaped thick wall head of wall thickness ratio, guarantees that the holistic temperature of special-shaped thick wall head is between 50 ℃ to 350 ℃, and can adjust its numerical value wantonly in this temperature range, guarantees that each difference in temperature is not more than 30 ℃.
The intermediate frequency heating device is also provided with an auxiliary bracket 8,
preferably, the auxiliary bracket 8 surrounds and buckles the air-cooled intermediate frequency cable layer, and the air-cooled intermediate frequency cable layer is fixed on the special-shaped thick-wall sealing head through the auxiliary bracket 8.
A heat insulation paste layer is arranged on one side of the auxiliary bracket 8 close to the air-cooled intermediate frequency cable layer,
more preferably, the auxiliary support 8 comprises a non-closed, ring-like ring made of flat steel bars, or the auxiliary support 8 comprises a closed ring made of insulating material.
The non-closed quasi-circular ring is in an approximate circular ring shape with the head and the tail not connected, but does not form a closed structure.
The insulating material is a high-temperature-resistant insulating material, is a non-conductive solid high-temperature-resistant insulating material under a permissible voltage, is not an absolutely non-conductive material, can also generate the processes of conduction, polarization, loss, breakdown and the like under the action of a certain external electric field intensity, and can also generate aging after long-term use.
The high-temperature resistant insulating material can be one or more selected from polytetrafluoroethylene, mica, glass fiber cloth laminated board, ceramic, heat-insulating cotton and products thereof.
The auxiliary support 8 is used for rigidly fixing the intermediate frequency air-cooled cable layer and the heat insulation isolation layer 7 and preventing the intermediate frequency air-cooled cable layer from loosening and falling.
Preferably, the fixing direction of the auxiliary bracket 8 is the same as the direction of the medium-frequency air-cooled cable, and if necessary, heat-resistant materials such as heat-preservation cotton are put in to separate the medium-frequency air-cooled cable layer from the auxiliary bracket 7, so that the auxiliary bracket 7 is prevented from being damaged due to overheating;
the intermediate frequency heating device is also provided with a blocking device 9, the blocking device 9 is a section of annular closed conductor, and the connection mode can be that the intermediate frequency air cooling cable is wound for a circle and is connected end to end, and can also be closed conductors in other modes.
The blocking device 9 can prevent the adjacent two air-cooled intermediate frequency cables from interfering with each other due to different frequencies and phase sequences of currents passing through the cables when the cables are heated, so that the heating effect is poor.
According to the utility model provides an intermediate frequency heating method, this intermediate frequency heating method includes following step:
step 1, mounting a special-shaped thick-wall end socket and an air-cooled intermediate frequency power supply on a positioner, and connecting an air-cooled intermediate frequency cable layer 100 with an intermediate frequency power supply 6;
step 2, a medium-frequency power supply 6 is communicated to preheat the special-shaped thick-wall end socket;
and 4, performing post-heating operation on the special-shaped thick-wall end socket after welding is completed.
In the step 1, the method comprises the following steps of,
the end part air-cooled intermediate frequency cable 1 is tightly wound on the large opening end of the special-shaped thick-wall end socket in a single layer, and both ends of the end part air-cooled intermediate frequency cable are connected with an intermediate frequency power supply 6,
tightly winding the second 3 end part air-cooled intermediate frequency cable in a single layer around the large opening end of the special-shaped thick-wall end socket, connecting two ends of the intermediate frequency cable with an intermediate frequency power supply 6,
a 3 single-layer mosquito-repellent incense type air-cooled intermediate frequency cable with a large connecting pipe is wound in the area of the large connecting pipe, both ends of the single-layer mosquito-repellent incense are connected with an intermediate frequency power supply 6,
two 4 single-layer mosquito-repellent incense types of the large connecting pipe air-cooled intermediate frequency cable are wound around the surrounding area of the large connecting pipe, and both ends of the large connecting pipe air-cooled intermediate frequency cable are connected with an intermediate frequency power supply 6,
the fifth air-cooled intermediate frequency cable 5 is tiled and wound in other areas of the cable layer, and both ends of the fifth air-cooled intermediate frequency cable are connected with an intermediate frequency power supply 6;
preferably, the large opening end of the special-shaped thick-wall end socket is arranged on the positioner through the supporting frame in an upward mode.
The positioner has rotation function and upset function, and the linkage effect of welding equipment and positioner can be realized after installing the big mouth end of dysmorphism thick wall head through the support frame on the positioner upwards.
The intermediate frequency power supply 6 is provided with a plurality of intermediate frequency power supplies, and the temperature of the large opening end of the special-shaped thick-wall end socket, the temperature of the anti-deformation device of the special-shaped thick-wall end socket, the temperature of the large connecting pipe area, the temperature of the area around the large connecting pipe and the temperature of other areas of the cable layer are respectively controlled by outputting different intermediate frequency currents.
In a preferred embodiment, the special-shaped thick-wall end socket is integrally preheated for 8 hours to reach 160 ℃, and the heat can be continuously preserved for 24 hours;
this application intermediate frequency heating device suitable for heating of dysmorphism thick wall head is nuclear power product, not only can guarantee the build-up welding quality when the build-up welding, can guarantee simultaneously that heating temperature is even, avoids the hot crack of the high production of temperature and the cold crack of the low production of temperature, can reach the effect of strict control temperature.
The special-shaped thick-wall end socket heating device can meet the requirement of temperature on all areas uniformly, is favorable for preventing the end socket from deforming on the basis of ensuring the temperature uniformity of the special-shaped end socket, is favorable for not generating cracks during surfacing and is also favorable for ensuring that the temperature of other individual areas is higher or lower during surfacing.
The wall thickness range that intermediate frequency heating device can act on is 20-300mm, can preheat and the postheating to the special-shaped thick wall head that has the thickness inequality, has various irregular protrusion, hole or takeover.
The present invention has been described above in connection with preferred embodiments, which are merely exemplary and illustrative. On this basis, can be right the utility model discloses carry out multiple replacement and improvement, these all fall into the utility model discloses a protection scope.
Claims (8)
1. A medium-frequency heating device suitable for heating a special-shaped thick-wall end socket is characterized in that,
the medium-frequency heating device comprises an air-cooled medium-frequency cable layer (100) and a medium-frequency power supply (6) which are coated outside a special-shaped thick-wall end socket, wherein the air-cooled medium-frequency cable layer (100) comprises an end part air-cooled medium-frequency cable I (1), an end part air-cooled medium-frequency cable II (2), a large-joint-pipe air-cooled medium-frequency cable I (3), a large-joint-pipe air-cooled medium-frequency cable II (4) and a fifth air-cooled medium-;
two ends of the end part air-cooled intermediate frequency cable I (1), the end part air-cooled intermediate frequency cable II (2), the large connecting pipe air-cooled intermediate frequency cable I (3), the large connecting pipe air-cooled intermediate frequency cable II (4) and the fifth air-cooled intermediate frequency cable (5) are respectively connected with an intermediate frequency power supply (6);
the power of a large opening end of the special-shaped thick-wall end socket, the power of the area around the large connecting pipe and the power of the other areas of the cable layer are respectively controlled by outputting different intermediate-frequency currents, so that the temperature is controlled;
a heat insulation isolation layer (7) is further arranged between the special-shaped thick-wall end socket and the air-cooled intermediate frequency cable layer, and the air-cooled intermediate frequency cable layer is isolated from the special-shaped thick-wall end socket through the heat insulation isolation layer (7);
an auxiliary bracket (8) is also arranged on the intermediate frequency heating device;
the blocking device (9) is further arranged on the outer side of the large opening port of the special-shaped thick-wall end socket, and the mutual interference of the end part air-cooled medium-frequency cable I (1) and the end part air-cooled medium-frequency cable II (2) during heating is prevented through the blocking device.
2. The intermediate frequency heating apparatus according to claim 1,
the end part air-cooled intermediate frequency cable I (1) is tightly wound around a large opening port of the special-shaped thick-wall end socket in a single layer;
the second end air-cooled intermediate frequency cable (2) is tightly wound around the surrounding area of the large opening end of the special-shaped thick-wall end socket in a single layer;
the single-layer tight winding is a winding mode that the cables are not overlapped or crossed in the winding process;
the large-connecting-pipe air-cooled medium-frequency cable I (3) is wound around the single-layer mosquito-repellent incense shape in the large connecting pipe area of the special-shaped thick-wall end socket;
a large connecting pipe air-cooled intermediate frequency cable II (4) is wound around the single-layer mosquito-repellent incense shape of the area around the large connecting pipe of the special-shaped thick-wall end socket;
and the fifth air-cooled intermediate frequency cable (5) is uniformly and singly wound in other areas of the special-shaped thick-wall end socket air-cooled intermediate frequency cable layer and is not crossed or overlapped with other cables.
3. The intermediate frequency heating apparatus according to claim 1,
the winding turns of the end part air-cooled intermediate frequency cable I (1), the end part air-cooled intermediate frequency cable II (2), the large-joint-pipe air-cooled intermediate frequency cable I (3), the large-joint-pipe air-cooled intermediate frequency cable II (4) and the fifth air-cooled intermediate frequency cable (5) are 3-5 turns.
4. The medium-frequency heating device suitable for heating the special-shaped thick-wall end socket is characterized in that according to the claim 1,
auxiliary stand (8) encircle and withhold on air cooling intermediate frequency cable layer, through auxiliary stand (8) will air cooling intermediate frequency cable layer is fixed on special-shaped thick wall sealing head.
5. The medium-frequency heating device suitable for heating the special-shaped thick-wall end socket is characterized in that according to the claim 3,
and a heat insulation paste layer is arranged on one side of the auxiliary support (8) close to the air-cooled intermediate frequency cable layer.
6. The medium-frequency heating device suitable for heating the special-shaped thick-wall end socket is characterized in that according to the claim 3,
the auxiliary support (8) comprises a non-closed, ring-like ring made of flat steel bars, or the auxiliary support (8) comprises a closed ring made of insulating material.
7. The intermediate frequency heating apparatus according to claim 1,
the blocking device (9) is an annular closed conductor.
8. The intermediate frequency heating apparatus according to claim 1,
the large opening end of the special-shaped thick-wall end socket is upwards arranged on the positioner through a support frame, and the intermediate frequency power supply (6) is arranged on the table top of the positioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022201492.4U CN213661996U (en) | 2020-09-30 | 2020-09-30 | Intermediate frequency heating device suitable for heating special-shaped thick-wall end socket |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022201492.4U CN213661996U (en) | 2020-09-30 | 2020-09-30 | Intermediate frequency heating device suitable for heating special-shaped thick-wall end socket |
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| CN213661996U true CN213661996U (en) | 2021-07-09 |
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