Long-flow resistance tube element of high-efficiency electric heater
阅读说明：本技术 高效电加温器长流程电阻管元件 (Long-flow resistance tube element of high-efficiency electric heater ) 是由 赵钧 王春花 赵成旺 于 2020-06-01 设计创作，主要内容包括：一种高效电加温器长流程电阻管元件,包括间隔设置的法兰盘和电极板,法兰盘和电极板之间安装有相对设置的“S”型电阻管,单个“S”型电阻管的结构为：从上往下依次设置的第一层电阻管、第二层电阻管和第三层电阻管,第一层电阻管的尾部通过第一转接头与第二层电阻管连接,第二层电阻管的尾部通过第二转接头与第三层电阻管连接,第一层电阻管的头部与穿过法兰盘,第三层电阻管的尾部穿过电极板；法兰盘、第一层电阻管、第二层电阻管和第三层电阻管上均安装有多个陶瓷支撑件。提高了换热效率,减小了设备长度,降低了电热原件最高表面温度,提高了设备使用寿命,大大提高了使用可靠性。(The utility model provides a long-flow resistance tube component of high-efficient electric heater, includes ring flange and the plate electrode that the interval set up, installs "S" type resistance tube that sets up relatively between ring flange and the plate electrode, and single "S" type resistance tube' S structure is: the tail part of the first layer of resistance tube is connected with the second layer of resistance tube through a first adapter, the tail part of the second layer of resistance tube is connected with the third layer of resistance tube through a second adapter, the head part of the first layer of resistance tube penetrates through the flange plate, and the tail part of the third layer of resistance tube penetrates through the plate electrode; and a plurality of ceramic supporting pieces are arranged on the flange plate, the first layer of resistance tube, the second layer of resistance tube and the third layer of resistance tube. The heat exchange efficiency is improved, the equipment length is reduced, the highest surface temperature of the electric heating element is reduced, the service life of the equipment is prolonged, and the use reliability is greatly improved.)
1. A long-flow resistance tube element of a high-efficiency electric heater is characterized in that: comprises flanges (1) and electrode plates (9) which are arranged at intervals, S-shaped resistance tubes which are oppositely arranged are arranged between the flanges (1) and the electrode plates (9),
the structure of a single S-shaped resistance tube is as follows: a first layer of resistance tube, a second layer of resistance tube and a third layer of resistance tube which are arranged from top to bottom in sequence, wherein the tail part of the first layer of resistance tube is connected with the second layer of resistance tube through a first adapter (7), the tail part of the second layer of resistance tube is connected with the third layer of resistance tube through a second adapter (3),
the head of the first layer of resistance tube passes through the flange plate (1), and the tail of the third layer of resistance tube passes through the electrode plate (9);
and a plurality of ceramic supporting pieces (4) are arranged on the flange plate (1), the first layer of resistance tube, the second layer of resistance tube and the third layer of resistance tube.
2. A high efficiency electric warmer long flow resistance tube element as recited in claim 1, wherein: the first layer of resistance tube, the second layer of resistance tube and the third layer of resistance tube are all slender tubes, and a plurality of spaced ceramic supporting pieces (4) penetrate through each slender tube.
3. A high efficiency electric warmer long flow resistance tube element as recited in claim 1, wherein: the first layer of resistance tube, the second layer of resistance tube and the third layer of resistance tube all adopt combined structures, the head part of the first layer of resistance tube is connected with a first resistance tube joint (2), the head part of the first resistance tube joint (2) passes through the flange plate (1), and is supported by a ceramic supporting piece (4), the tail part of the first resistance pipe joint (2) is provided with a first connecting resistance pipe (5) through the ceramic supporting piece (4), the tail part of the first connecting resistance pipe (5) is also provided with a second connecting resistance pipe (6) through the ceramic supporting piece (4), the tail part of the second connecting resistance pipe (6) is provided with a second layer of resistance pipe through a first adapter (7), the tail part of the second layer of resistance pipe is provided with a third layer of resistance pipe through a second adapter (3), the tail part of the third layer of resistance tube is connected with a second resistance tube joint (8), and the second resistance tube joint (8) penetrates through the electrode plate (9).
4. A high efficiency electric heater long flow resistance tube element as claimed in any one of claims 1 to 3 wherein: the ceramic support (4) has the structure that: the resistor comprises a middle cylinder structure (403), a first cylinder structure (401) and a second cylinder structure (404) respectively extend from two ends of the middle cylinder structure (403), metal linings (402) are simultaneously installed inside the first cylinder structure (401), the middle cylinder structure (403) and the second cylinder structure (404), and the metal linings (402) are matched with a resistor tube; the first cylinder structure (401), the middle cylinder structure (403) and the second cylinder structure (404) are made of silicon carbide materials or aluminum oxide ceramic materials.
5. A high efficiency electric warmer long flow resistance tube element as recited in claim 1, wherein: the wall thicknesses of the first layer of resistance tube, the second layer of resistance tube and the third layer of resistance tube are gradually increased from small to large.
6. A high efficiency electric warmer long flow resistance tube element as recited in claim 1, wherein: the wall thickness of the first layer of resistance tube is 1.6-1.8mm, the wall thickness of the second layer of resistance tube is 1.7-1.9mm, and the wall thickness of the third layer of resistance tube is 1.8-2 mm.
7. A high efficiency electric warmer long flow resistance tube element as recited in claim 1, wherein: the diameters of the first layer of resistance tube, the second layer of resistance tube and the third layer of resistance tube are sequentially increased from small to large.
8. A high efficiency electric warmer long flow resistance tube element as recited in claim 1, wherein: the diameter of the first layer of resistance tube is 20mm, the diameter of the second layer of resistance tube is 21mm, and the diameter of the third layer of resistance tube is 22 mm.
9. A high efficiency electric warmer long flow resistance tube element as recited in claim 1, wherein: a radiant tube is arranged between the two S-shaped resistance tubes, one end of the radiant tube is connected with the flange plate (1), and the other end of the radiant tube is spaced from the electrode plate (9).
Technical Field
The invention relates to the technical field of electric heating elements, in particular to a long-flow resistance tube element of an efficient electric heater.
Background
The electric heater is core electric heating equipment for military industry key equipment technical research and development and performance verification. For the heating up of the flowing gaseous medium. When the heating medium passes through the heating cavity of the electric heater under the action of pressure, the fluid thermodynamic principle is adopted to uniformly carry away huge heat generated in the internal work of the electric heating element, so that the temperature of the heated medium meets the process requirement.
Disclosure of Invention
The applicant aims at the defects in the prior art and provides a long-flow resistance tube element of a high-efficiency electric heater with a reasonable structure, so that resistance tubes with assembled structures are adopted and connected in series end to end, the problems of over temperature, long installation size, difficulty in manufacturing and large expansion amount in the use process of the resistance tubes are effectively solved, the mass flow of air in the tubes can be kept unchanged, the heat exchange coefficient is ensured not to be reduced, the heating surface area of the adopted resistance tubes is 3 times that of the heating surface area of a common resistance tube on the premise of the same length and size, the heat exchange efficiency is improved, the length and size of equipment are reduced, the highest surface temperature of an electric heating element is reduced, the service life of the equipment is prolonged, and the use reliability is greatly improved.
The technical scheme adopted by the invention is as follows:
a long-flow resistance tube element of a high-efficiency electric heater comprises a flange and a plate electrode which are arranged at intervals, an S-shaped resistance tube which is oppositely arranged is arranged between the flange and the plate electrode,
the structure of a single S-shaped resistance tube is as follows: a first layer of resistance tube, a second layer of resistance tube and a third layer of resistance tube which are arranged from top to bottom in sequence, wherein the tail part of the first layer of resistance tube is connected with the second layer of resistance tube through a first adapter, the tail part of the second layer of resistance tube is connected with the third layer of resistance tube through a second adapter,
the head of the first layer of resistance tube passes through the flange plate, and the tail of the third layer of resistance tube passes through the electrode plate;
and a plurality of ceramic supporting pieces are arranged on the flange plate, the first layer of resistance tube, the second layer of resistance tube and the third layer of resistance tube.
As a further improvement of the above technical solution:
the first layer of resistance tube, the second layer of resistance tube and the third layer of resistance tube are all slender tubes, and a plurality of spaced ceramic supporting pieces penetrate through each slender tube.
First layer resistance tube, second layer resistance tube and third layer resistance tube all adopt integrated configuration, and the head of first layer resistance tube is connected with first resistance tube and connects, first resistance tube connects the head and passes the ring flange to support through ceramic support piece, first resistance tube connects the afterbody and passes through the first connecting resistance tube of ceramic support piece installation, and the afterbody of first connecting resistance tube is equally through ceramic support piece installation second connecting resistance tube, and the afterbody of second connecting resistance tube passes through first adapter installation second layer resistance tube, and second layer resistance tube afterbody passes through second adapter installation third layer resistance tube, the connection second resistance tube of afterbody of third layer resistance tube connects, and second resistance tube connects and passes the plate electrode.
The ceramic support has the structure that: the resistor comprises a middle cylinder structure, wherein a first cylinder structure and a second cylinder structure respectively extend from two ends of the middle cylinder structure, metal linings are simultaneously arranged in the first cylinder structure, the middle cylinder structure and the second cylinder structure, and the metal linings are matched with a resistor tube; the first cylinder structure, the middle cylinder structure and the second cylinder structure are made of silicon carbide materials or aluminum oxide ceramic materials.
The wall thicknesses of the first layer of resistance tube, the second layer of resistance tube and the third layer of resistance tube are gradually increased from small to large.
The wall thickness of the first layer of resistance tube is 1.6-1.8mm, the wall thickness of the second layer of resistance tube is 1.7-1.9mm, and the wall thickness of the third layer of resistance tube is 1.8-2 mm.
The diameters of the first layer of resistance tube, the second layer of resistance tube and the third layer of resistance tube are sequentially increased from small to large.
The diameter of the first layer of resistance tube is 20mm, the diameter of the second layer of resistance tube is 21mm, and the diameter of the third layer of resistance tube is 22 mm.
A radiant tube is arranged between the two S-shaped resistance tubes, one end of the radiant tube is connected with the flange plate, and the other end of the radiant tube is spaced from the electrode plate.
The invention has the following beneficial effects:
the invention has compact and reasonable structure and convenient operation, changes the structure of the resistance tube from the original strip-shaped tube into the S-shaped resistance tube, adopts an assembled structure to reduce the length of the heating core to 1/3 of the original length, effectively reduces the deformation amount generated due to inconsistent temperature, and can effectively release the deformation amount through the connection of 6 resistance tubes, thereby avoiding the stress bending deformation of the resistance tube.
The S-shaped resistance tube structure can greatly improve the heat exchange efficiency.
The S-shaped resistance tube structure increases the heat exchange length, has the effect equivalent to that 3 devices are connected in series, and can effectively reduce the working temperature of the resistance tube and ensure the service life.
The invention adopts a double-group S-shaped resistance tube connecting structure, can fully release the temperature difference deformation of the resistance tube, and avoids the situations of bending deformation and ceramic fragmentation of the resistance tube.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic structural view of the ceramic support of the present invention.
Wherein: 1. a flange plate; 2. a first resistance tube joint; 3. a second adapter; 4. a ceramic support; 5. a first connecting resistance tube; 6. a second connecting resistance tube; 7. a first adapter; 8. a second resistance tube joint; 9. an electrode plate;
401. a first cylindrical structure; 402. a metal liner; 403. a middle cylindrical structure; 404. a second cylindrical structure.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in FIG. 1, the long-flow resistance tube element of the high-efficiency electric heater of the present embodiment comprises a flange 1 and an electrode plate 9 which are arranged at intervals, an S-shaped resistance tube which is arranged oppositely is arranged between the flange 1 and the electrode plate 9,
the structure of a single S-shaped resistance tube is as follows: a first layer of resistance tube, a second layer of resistance tube and a third layer of resistance tube which are arranged from top to bottom in sequence, wherein the tail part of the first layer of resistance tube is connected with the second layer of resistance tube through a first adapter 7, the tail part of the second layer of resistance tube is connected with the third layer of resistance tube through a second adapter 3,
the head of the first layer of resistance tube passes through the flange plate 1, and the tail of the third layer of resistance tube passes through the electrode plate 9;
and a plurality of ceramic supporting
The first layer of resistance tube, the second layer of resistance tube and the third layer of resistance tube are all slender tubes, and a plurality of ceramic supporting
First layer resistance tube, second layer resistance tube and third layer resistance tube all adopt integrated configuration, the head of first layer resistance tube is connected with first resistance coupling 2, 2 heads of first resistance coupling pass ring flange 1, and support through
As shown in fig. 2, the
The wall thicknesses of the first layer of resistance tube, the second layer of resistance tube and the third layer of resistance tube are gradually increased from small to large.
The wall thickness of the first layer of resistance tube is 1.6-1.8mm, the wall thickness of the second layer of resistance tube is 1.7-1.9mm, and the wall thickness of the third layer of resistance tube is 1.8-2 mm.
The diameters of the first layer of resistance tube, the second layer of resistance tube and the third layer of resistance tube are sequentially increased from small to large.
The diameter of the first layer of resistance tube is 20mm, the diameter of the second layer of resistance tube is 21mm, and the diameter of the third layer of resistance tube is 22 mm.
A radiant tube is arranged between the two S-shaped resistance tubes, one end of the radiant tube is connected with the flange plate 1, and the other end of the radiant tube is spaced from the electrode plate 9.
A radiant tube (not shown in the figure) is arranged between the two S-shaped resistance tubes, one end of the radiant tube (not shown in the figure) is connected with the flange plate 1, and the other end of the radiant tube is spaced from the electrode plate 9.
The diameter of the first layer of resistance tube is small, the diameter of the second layer of resistance tube is medium, the diameter of the third layer of resistance tube is large, and the principle is as follows: the first layer of resistance tube is low in air inlet temperature, small in volume flow, small in required flow cross section, the first layer and the third layer are large, the smaller the diameter is, the larger the resistance is, the larger the heating value is, the higher the heating power is, the lower the heat exchange coefficient is, the higher the heat exchange coefficient is, the heating power can be realized, the equipment cost can be reduced, the smaller the heat transfer distance is, the higher the heat exchange coefficient is, the space is saved, and the equipment size is reduced. The method is not limited to changing the diameter, and can also realize high-back low power by changing the resistivity of the material, wherein the resistivity of the first layer is high, and the resistivity of the third layer in the second layer is low.
The radiant tube (not shown in the figure) is high temperature resistant, has high radiation and radiation receiving rate, is used for supplementing a flow channel when equipment needs a larger flow cross section, is not connected with a power supply, and is heated in a radiation mode through the circular distribution of the electrified resistive tubes, so that the effects of increasing the heat transfer area and the flow channel and reducing the temperature of a heating combined element are achieved.
The resistance tube element can be directly installed in the tube shell to form a detachable electric heater heat source component.
The resistance tube element is arranged in an electric heater, the electric heater mainly comprises an air inlet rectifying cavity, a heat conducting oil cooling jacket, a pressure-bearing cylinder, a container heat insulation inner container, an air cooling inner jacket, a core-pulling resistance tube and the like, cold media firstly enter the air rectifying cavity, a plurality of small holes are formed in the rectifying cavity to play a role in equalizing and reducing air inlet flow and speed, uniform air enters the air cooling inner jacket to cool the pressure-bearing cylinder, the air cooling jacket firstly primarily heats low-temperature air and then enters the resistance tube to secondarily heat the air, and the air temperature meeting the technological requirements is obtained.
The above description is intended to be illustrative and not restrictive, and the scope of the invention is defined by the appended claims, which may be modified in any manner within the scope of the invention.
- 上一篇：一种医用注射器针头装配设备
- 下一篇：一种电磁加热装置