Novel air heating core for electric furnace

Abstract

The utility model discloses a novel air heating core for an electric furnace, which relates to the technical field of heating cores for electric furnaces, aims to solve the problems of low heat exchange efficiency and lack of activity space for thermal expansion and cold contraction in the prior art, and adopts the technical scheme that the novel air heating core comprises a partition plate, a heating pipe is arranged on the partition plate and connected with a circuit connecting sheet; the heating pipes are electrically connected through the circuit connecting pieces, the multiple partition plates are connected through the pull rods, the heating pipes are arranged on the partition plates in a regular triangle shape, and the heating pipes are connected in a snakelike shape through the connecting sleeves to form a loop; overflowing holes are formed in the partition plates and located in the centers of every three adjacent heating pipes arranged in a triangular mode and the centers of the partition plates, airflow can continuously flow and pass through the three heating pipes, and therefore the contact area between the airflow and the heating pipes is increased, and the heat exchange efficiency is improved; the end face of the connecting sleeve does not contact with the end face of the partition plate, a space for the heating pipe to stretch out and draw back is reserved between the connecting sleeve and the partition plate, and the service life of the furnace core is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of electric furnace heating cores, in particular to a novel air heating core for an electric furnace. Background Art

[0002] The high-temperature processing industry requires the use of high-temperature air heat exchangers, which use electric heating tubes to heat the circulating air to produce a high-temperature air fluid. The heating cores of existing high-temperature air heat exchanger electric furnaces suffer from low heat exchange efficiency and a lack of space for thermal expansion and contraction. Specifically, existing heating cores only have airflow holes around the partitions, resulting in a small contact area between the air and the heating tubes. During use, the heating tubes and connecting sleeves expand and contract due to heating and cooling. The existing heating tube ends are directly connected to the connecting sleeves after being connected to the partitions, leaving no room for movement between the connecting sleeves and the partitions, resulting in a reduced service life for the connecting sleeves and heating tubes. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a novel air heating core for an electric furnace, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model discloses a novel air heating core for an electric furnace, and the technical solution adopted is as follows: it includes a partition, an edge of the partition is provided with a side groove, there are multiple partitions, a heating tube is installed on the partition, the heating tube is connected to a circuit connecting piece, the heating tube is powered by the circuit connecting piece, multiple partitions are connected by a pull rod, the heating tubes are arranged in a regular triangle on the partition, and the heating tubes are serpentine-connected by a connecting sleeve to form a loop; a flow hole is provided on the partition, and the flow hole is located at the center of every three adjacent triangularly arranged heating tubes and the middle of the partition, so that the air flow can flow continuously between the three heating tubes, thereby increasing the contact area between the air flow and the heating tube and improving the heat exchange efficiency; the end face of the connecting sleeve and the end face of the partition do not contact, and space for the heating tube to expand and contract is reserved between the connecting sleeve and the partition, thereby improving the service life of the furnace core.

[0005] As a preferred technical solution of the present invention, the partition includes a large partition and a small partition. The large partition is located at one end close to the circuit connection piece. There is one group of large partitions and four groups of small partitions. Distance tubes are installed between adjacent partitions. The distance tubes can position the partitions to prevent them from sliding.

[0006] As an optimal technical solution of the present utility model, the large partition is also provided with a first through-hole and a first set of holes, the distance tube is installed in the first through-hole, and the pull rod passes through the distance tube; there are threaded sections at both ends of the pull rod, and nuts are engaged on the threaded sections, and the pull rod, partition and distance tube can be locked by the nuts; a corundum sleeve is installed in the first set of holes, and the heating tube is installed in the corundum sleeve, and the corundum sleeve can achieve the effect of insulation.

[0007] As an optimal technical solution of the present invention, the small partition is further provided with a second through-hole and a second set of holes, the distance tube is installed in the second through-hole; the corundum sleeve is installed in the second set of holes, and the heating tube is installed in the corundum sleeve.

[0008] As an optimal technical solution of the present invention, the corundum sleeve is thin at both ends and thick in the middle; each group of the partitions has two, and the two partitions are connected to the thin section of the corundum sleeve, which can achieve the effect of stable connection and support.

[0009] As an optimal technical solution of the present invention, there is a central air flow hole in the center of the large partition, and the first air flow holes are distributed in a circular array around the central air flow hole, which can enable each heating tube to fully contact with the air for heating. At the same time, the heating temperature in the middle is higher, so more air flow holes are opened in the middle of the partition to make the temperature of the air flow more uniform.

[0010] As a preferred technical solution of the present invention, the middle portion of the small partition is provided with the second air flow holes distributed in a circular array.

[0011] As an optimal technical solution of the present invention, the connecting sleeve is two connected C-shaped clips, and there is a slit between the two ends of the C-shaped clip. This structure can ensure that the connecting sleeve is stably mounted on the electric heating tube and is not prone to sliding.

[0012] Compared with the prior art, the present invention has the following advantages: by arranging the heating tubes in an equilateral triangle on the partitions and providing airflow holes at the center of each triangular array of heating tubes, the present invention enables all heating tubes to fully contact the airflow, thereby improving heat exchange efficiency. Because the temperature in the center of the heating core is higher than that in the surrounding area, multiple airflow holes arranged in a circular array are provided in the center of the partitions, allowing more air to flow through the center of the heating core and improving the stability of airflow heating. A certain amount of space is reserved between the connecting sleeve and the end plate to provide flexibility for the thermal expansion and contraction of the heating tubes and the connecting sleeve, thereby increasing the service life of the heating core. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is an enlarged schematic diagram of part A of the utility model;

[0015] Figure 3 This is a right side structural diagram of the present utility model;

[0016] Figure 4 This is a structural diagram of the corundum sleeve of the utility model;

[0017] Figure 5 This is a front view of the connection structure between the small partition and the corundum sleeve of the utility model;

[0018] Figure 6 This is a schematic diagram of the connection structure between the small partition and the corundum sleeve of the utility model;

[0019] Figure 7 This is a schematic diagram of the large partition structure of the utility model;

[0020] Figure 8 This is a schematic diagram of the small partition structure of the utility model.

[0021] In the figure: 1. Large partition; 2. Small partition; 3. Heating tube; 4. Distance tube; 5. Corundum sleeve; 6. Small side groove; 7. Second air flow hole; 8. Nut; 9. Large side groove; 10. Second through hole; 11. First through hole; 12. First air flow hole; 13. First set of holes; 14. Center air flow hole; 15. Second set of holes; 16. Pull rod; 17. Connecting sleeve; 18. Circuit connecting piece. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0023] like Figures 1 to 8 As shown, the utility model discloses a novel air heating core for electric furnace, which adopts the technical solution of comprising a large partition 1 and a small partition 2, wherein the large partition 1 and the small partition 2 are both grouped in twos, the large partition 1 has one group, and the small partition 2 has four groups, such as Figure 7As shown, the large partition 1 is a circular plate with a large semicircular side groove 9 on the edge, and a first through-hole 11, a first air flow hole 12 and a first set of holes 13 are provided on the plate surface. There are multiple rows of first sets of holes 13, and each row of first sets of holes 13 is staggered with the first sets of holes 13 in the adjacent row; one first set of holes 13 in each row and two adjacent first sets of holes 13 in the downward adjacent row are distributed in an equilateral triangle, and the first air flow holes 12 are distributed in the center of the equilateral triangle; there are six first through-holes 11, which are arranged in a circular array on the plate surface of the large partition 1 and are located at the outer edge of the first through-hole 11 area; a central air flow hole 14 is opened at the center of the circle of the large partition 1, and the first air flow holes 12 are arranged in a circular array around the central air flow hole 14.

[0024] like Figure 8 As shown, the difference between the small partition 2 and the large partition 1 is that the size of the small partition 2 is smaller than that of the large partition 1, and the small partition 2 eliminates the central air flow hole 14.

[0025] like Figure 2 、 Figure 5 、 Figure 6 As shown, the corundum sleeve 5 is installed on the first set of holes 13 of the large partition 1 and the second set of holes 15 of the small partition 2, as shown in FIG. Figure 4 As shown, the central portion of the corundum sleeve 5 comprises a thick section with a larger outer diameter, flanked by thin sections with smaller outer diameters. The thick and thin sections have the same inner diameter. The thin sections are installed in the first or second set of holes 13 or 15, while the thick sections are separated between two adjacent partitions. The heating tube 3 passes through the corundum sleeve 5, which provides insulation.

[0026] A pull rod 16 is used to pass through the first through-hole 11 of the large partition 1 and the second through-hole 10 of the small partition 2. There are threaded sections at both ends of the pull rod 16, and nuts 8 are engaged on the threaded sections. In order to prevent the large partition 1 and the small partition 2 from sliding on the pull rod 16, a distance tube 4 is set between the large partition 1 and the adjacent small partition 2, and between the small partition 2 and the adjacent small partition 2. The distance tube 4 is fixedly installed in the first through-hole 11 of the large partition 1 and the second through-hole 10 of the small partition 2. Among the two large partitions 1, the one close to the small partition 2 is connected to the distance tube 4. Among the two small partitions 2 in each group, the small partition 2 close to the large partition 1 is connected to the distance tube 4 close to the large partition 1, and the small partition 2 away from the large partition 1 is connected to the distance tube 4 away from the large partition 1. The two small partitions 2 in each group are separated by the thick section of the corundum sleeve 5, and the distance tube 4 is no longer set. The pull rod 16 passes through the distance tube 4, and then the large partition 1 and the small partition 2 can be locked using the nut 8 to achieve tight positioning.

[0027] In order to heat the air, a heating tube 3 is installed in the corundum sleeve 5, and the heating tube 3 is connected in a serpentine shape through a connecting sleeve 17, as shown in FIG. Figure 2As shown, the connecting sleeve 17 is two C-shaped cards connected by a connecting plate. The opening of the C-shaped card is a slit, which can meet the opening requirements during installation, facilitate assembly, and increase the contact area, making the connection more stable. The connecting sleeve 17 is made of conductive material.

[0028] The heating tubes 3 are divided into three groups, one end of each group is connected to a live electrode of a circuit connection piece 18, and the other end is connected to a common neutral electrode.

[0029] The working principle of this utility model:

[0030] Connect the live wire of the power supply to the live wire electrode of the circuit connection piece 18, and connect the neutral wire of the power supply to the neutral wire electrode of the circuit connection piece 18. After power is turned on, the heating tube 3 starts to heat up.

[0031] When the air flows through the small side grooves 6, the second air flow holes 7, the large side grooves 9, the first air flow holes 12, and the central air flow holes 14, it fully contacts the heating tube 3 to obtain a high-temperature fluid with uniform temperature.

[0032] The circuits and mechanical connections involved in the present invention are conventional means used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments, and they belong to common knowledge.

[0033] Components not described in detail herein are prior art.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel air heating core for an electric furnace, comprising a partition, wherein the partition edge is provided with a side groove, the partition is provided with a plurality of partitions, a heating tube (3) is mounted on the partition, and the heating tube (3) is connected to a circuit connecting piece (18), characterized in that: The plurality of partitions are connected by a pull rod (16), the heating tubes (3) are arranged in a regular triangle on the partitions, and the heating tubes (3) are connected in a serpentine manner through a connecting sleeve (17); a flow hole is provided on the partition, and the flow hole is located at the center of every three adjacent heating tubes (3) arranged in a triangular manner and in the middle of the partition; the end face of the connecting sleeve (17) does not contact the end face of the partition, and a space for the heating tube (3) to expand and contract is reserved between the connecting sleeve (17) and the partition.

2. The novel air heating core for electric furnace according to claim 1 is characterized in that: The partition includes a large partition (1) and a small partition (2). The large partition (1) is located at one end close to the circuit connection plate (18). There is one group of large partitions (1) and four groups of small partitions (2). A distance tube (4) is installed between two adjacent groups of partitions.

3. The novel air heating core for electric furnace according to claim 2 is characterized in that: The large partition (1) is further provided with a first through-hole (11) and a first set of holes (13); the distance tube (4) is installed in the first through-hole (11), and the pull rod (16) passes through the distance tube (4); both ends of the pull rod (16) have threaded sections, and the threaded sections are engaged with nuts (8); the first set of holes (13) is provided with a corundum sleeve (5), and the heating tube (3) is installed in the corundum sleeve (5).

4. The novel air heating core for electric furnace according to claim 3 is characterized in that: The small partition (2) is further provided with a second through-hole (10) and a second set of holes (15), and the distance tube (4) is installed in the second through-hole (10); the corundum sleeve (5) is installed in the second set of holes (15), and the heating tube (3) is installed in the corundum sleeve (5).

5. The novel air heating core for electric furnace according to claim 4 is characterized in that: The corundum sleeve (5) is thin at both ends and thick in the middle; each group of the partitions has two, and the two partitions are connected to the thin section of the corundum sleeve (5).

6. The novel air heating core for electric furnace according to claim 2 or 3, characterized in that: The center of the large partition (1) is provided with a central air flow hole (14), and the first air flow holes (12) are distributed in a circular array around the central air flow hole (14).

7. The novel air heating core for electric furnace according to claim 2 is characterized in that: The middle portion of the small partition (2) is provided with second air flow holes (7) distributed in an annular array.

8. The novel air heating core for electric furnace according to claim 1 is characterized in that: The connecting sleeve (17) is composed of two connected C-shaped cards, with a slit between the two ends of the C-shaped card.

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