Improved electric heating core

Abstract

The utility model relates to an improved electric heating core, including support assembly, multi-group resistance wire, cold end, tail end and ground connection piece, support assembly includes the head end support block, cold end support block, middle support block and tail end support block that are arranged in line in order at interval, the cold end and tail end are provided with a plurality of groups, the resistance wire passes through the middle support block, the ground connection piece passes through the tail end support block, and the ground connection piece passes through the ground connection piece. The cold end and the tail end respectively penetrate through the head end supporting block and the cold end supporting block, the cold end is connected with one resistance wire in each group, the tail end is connected with the other resistance wire in each group, a conductive connecting piece is arranged in the tail end supporting block, and each group of resistance wires are respectively connected with the conductive connecting piece. The grounding piece penetrates through the head end supporting block, the cold end supporting block, the middle supporting block and the tail end supporting block, and the head end supporting block, the cold end supporting block, the middle supporting block and the tail end supporting block are connected with the grounding piece through fasteners. The electric heating core has the advantages that the distance between the supporting blocks is limited, overlarge gaps between the supporting blocks caused by thermal expansion and cold contraction deformation can be effectively prevented, and the operation stability of the electric heating core is higher.

Description

Technical Field

[0001] This utility model relates to the field of resistance electric heater technology, and in particular to an improved electric heating core. Background Technology

[0002] The heating element of a high-temperature resistance electric heater typically consists of a resistance wire support block, resistance wire, cold end, tail end, and grounding flat iron. The resistance wire support block is connected in series with the grounding flat iron to form a heating element of a certain length, with the resistance wire supported on the support block. At high temperatures, the coefficient of thermal expansion of metals is much greater than that of ceramics. When the heating element heats up, the support blocks and the grounding flat iron expand due to heat. When heating stops, they contract, easily creating large gaps between the support blocks. This causes the resistance wire support distance to increase, leading to sagging and insufficient electrical clearance between the resistance wires. Consequently, the resistance wires may sinter together, causing the heating element to burn out.

[0003] Therefore, it is necessary to develop an improved electric heating core that can overcome the above-mentioned technical problems by ensuring the electrical clearance of the resistance wire through the spacing between the positioning support blocks. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an improved electric heating core, which effectively overcomes the defects of the prior art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] An improved electric heating core includes a support assembly, multiple sets of resistance wires, a columnar and conductive cold end, a columnar and conductive tail end, and a strip-shaped grounding component. The support assembly includes insulated head support blocks, cold end support blocks, multiple intermediate support blocks, and tail end support blocks arranged in a straight line. Multiple sets of cold and tail ends are provided, each corresponding to one of the resistance wires in each set. Each set of resistance wires has two wires, each passing through a first through-hole in one of the intermediate support blocks. Each set of cold and tail ends passes through a second through-hole in the head and cold end support blocks, respectively. The cold end is connected to one end of one of the resistance wires in the corresponding group, and the tail end of each group is connected to one end of the other resistance wire in the corresponding group. The tail end support block is provided with a conductive connector corresponding to each resistance wire in the group. The other ends of the two resistance wires in each group are respectively connected to the corresponding conductive connectors. The grounding component passes through the adapted third through hole on the first end support block, the cold end support block, the multiple intermediate support blocks and the tail end support block. The first end support block, the cold end support block, the multiple intermediate support blocks and the tail end support block are detachably connected to the grounding component by fasteners.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the aforementioned cold end support block is provided in multiple parts.

[0009] Furthermore, the aforementioned resistance wire is provided in three sets, and the three sets of resistance wire are distributed in the middle area and both sides of the cross section of the aforementioned support component, with the three sets of resistance wire being staggered vertically.

[0010] Furthermore, the aforementioned grounding component is a grounding flat iron, and the aforementioned third through holes are all located near the edges of the aforementioned first end support block, cold end support block, multiple intermediate support blocks, and tail end support block.

[0011] Furthermore, the fasteners are bolts. The first end support block, the cold end support block, the middle support block and the tail end support block are vertically opened on the same side with bolt holes that communicate with the third through hole. The fasteners are installed in the bolt holes and are threadedly connected to the matching screw holes on the grounding parts.

[0012] Furthermore, one end of the aforementioned first end support block, cold end support block, middle support block and tail end support block is integrally formed with a protruding positioning part corresponding to the part of the aforementioned grounding member, and the other end of the aforementioned first end support block, cold end support block, middle support block and tail end support block is provided with a fitting groove adapted to the aforementioned positioning part, and the aforementioned positioning part is embedded in the adjacent aforementioned fitting groove.

[0013] Furthermore, the cold end is a cylindrical component with threads on its surface. The cold end passes through the first end support block and / or the two ends of the cold end support block and is threaded with a first tightening nut. The tail end is a cylindrical component with threads on its surface. The tail end is threaded with a second tightening nut at both ends of the first end support block and / or the cold end support block.

[0014] Furthermore, the aforementioned conductive connector is a C-shaped component, with both ends of the conductive connector passing through the adapted fourth through hole in the aforementioned tail end support block, and respectively connected to the other end of a corresponding set of two aforementioned resistance wires.

[0015] Furthermore, an insulating end cap is attached to the end of the aforementioned tail support block, and the aforementioned grounding component passes through the aforementioned end cap and is detachably connected to the aforementioned end cap by fasteners.

[0016] Furthermore, the aforementioned head support block, cold end support block, multiple intermediate support blocks, and tail end support block are all magnesium oxide ceramic components.

[0017] The beneficial effects of this utility model are: the structural design is simple and reasonable, and each support block is fixed to the grounding component, thereby limiting the distance between the support blocks. This can effectively prevent excessive gaps between the support blocks caused by thermal expansion and contraction deformation, and make the operation stability of the electric heating core higher. Attached Figure Description

[0018] Figure 1 This is a side view of the structure of the improved electric heating core of this utility model;

[0019] Figure 2 This is a top view of the structure of the improved electric heating core of this utility model;

[0020] Figure 3 This is a top view of the structure of the improved electric heating core of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of one end of the intermediate support block of the improved electric heating core of this utility model, which has a fitting groove.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Head support block; 2. Cold end support block; 3. Middle support block; 4. Tail end support block; 5. Resistance wire; 6. Cold end; 7. Tail end; 8. Grounding component; 9. Conductive connector; 10. Fastener; 20. End cap; 61. First tightening nut; 71. Second tightening nut. Detailed Implementation

[0024] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0025] Example

[0026] like Figure 1 , 2As shown in Figure 3, the improved electric heating core of this embodiment includes a support assembly, multiple sets of resistance wires 5, a columnar and conductive cold end 6, a columnar and conductive tail end 7, and a strip-shaped grounding component 8. The support assembly includes insulated first-end support blocks 1, cold-end support blocks 2, multiple intermediate support blocks 3, and tail-end support blocks 4 arranged in a straight line. Multiple sets of cold ends 6 and tail ends 7 are provided, each corresponding to one set of resistance wires 5. Each set of resistance wires 5 has two wires, which respectively pass through the first through holes adapted in the multiple intermediate support blocks 3. Each set of cold ends 6 and tail ends 7 respectively pass through the second through holes adapted in the first-end support block 1 and cold-end support block 2. The cold end 6 is connected to one end of one of the resistance wires 5 in the corresponding group, and the tail end 7 in each group is connected to one end of the other resistance wire 5 in the corresponding group. The tail end support block 4 is provided with a conductive connector 9 corresponding to each resistance wire 5 in each group. The other ends of the two resistance wires 5 in each group are respectively connected to the corresponding conductive connector 9. The grounding component 8 passes through the adapted third through hole on the first end support block 1, the cold end support block 2, the multiple intermediate support blocks 3 and the tail end support block 4. The first end support block 1, the cold end support block 2, the multiple intermediate support blocks 3 and the tail end support block 4 are detachably connected to the grounding component 8 by fasteners 10.

[0027] In the improved electric heating core of this embodiment, the first end support block 1, the cold end support block 2, the multiple intermediate support blocks 3 and the tail end support block 4 are fixed to the grounding component 8 by fasteners 10, thereby limiting the distance between the support blocks. This can effectively prevent the gap between the support blocks from being too large due to thermal expansion and contraction deformation, and make the operation stability of the electric heating core higher.

[0028] In this embodiment, the cold end support block 2 is provided in multiple parts.

[0029] In this embodiment, the resistance wires 5 are provided in three sets, and the three sets of resistance wires 5 are distributed in the middle area and both sides of the cross-section of the support component, with the three sets of resistance wires 5 staggered vertically. More specifically, with the entire electric heating core arranged horizontally, the set of resistance wires 5 located in the middle of the cross-section is positioned slightly above, while the other two sets of resistance wires 5 are positioned slightly below, and the third through hole is located below the middle set of resistance wires 5.

[0030] In this embodiment, the grounding component 8 is a conventional grounding flat iron, and the third through holes are all located near the edges of the first end support block 1, the cold end support block 2, the multiple intermediate support blocks 3, and the tail end support block 4. The third through hole is designed as a rectangular through hole that is adapted to the grounding flat iron, and its proximity to the edge of the support block facilitates the assembly of the fastener 10.

[0031] In this embodiment, the fastener 10 is a bolt. The first end support block 1, the cold end support block 2, the middle support block 3, and the tail end support block 4 all have bolt holes perpendicularly formed on the same side, communicating with the third through hole. The fastener 10 is installed in these bolt holes and threadedly connected to the matching screw holes on the grounding component 8. After passing through the bolt holes on the support blocks, the bolts extend into the corresponding screw holes on the grounding component 8 and are threadedly connected to it. After assembly, the bolts are completely embedded in the bolt holes.

[0032] As a preferred implementation method, such as Figure 4 As shown, one end of the aforementioned first end support block 1, cold end support block 2, middle support block 3 and tail end support block 4 is integrally formed with a protruding positioning part (a in the figure) corresponding to the part of the aforementioned grounding member 8. The other end of the aforementioned first end support block 1, cold end support block 2, middle support block 3 and tail end support block 4 is provided with a fitting groove (b in the figure) that is adapted to the aforementioned positioning part. The aforementioned positioning part is embedded in the adjacent aforementioned fitting groove.

[0033] In the above implementation scheme, the design of the positioning part can serve to separate and maintain the distance between two adjacent support blocks. At the same time, the fitting assembly of the positioning part and the fitting groove also facilitates the positioning assembly between two adjacent support blocks.

[0034] In a preferred embodiment, the cold end 6 is a cylindrical component with threads on its surface. The cold end 6 passes through the two ends of the first end support block 1 and / or the cold end support block 2 and is threaded with a first tightening nut 61. The tail end 7 is a cylindrical component with threads on its surface. The tail end 7 is threaded with a second tightening nut 71 at both ends of the first end support block 1 and / or the cold end support block 2.

[0035] In the above implementation scheme, the cold end 6 can be fixed to the first end support block 1 and / or the cold end support block 2 by the first tightening nut 61. Combined with the design of the fastener 10 at the other end of the entire electric heating core, the resistance wire 5 can be stably connected and assembled.

[0036] In this embodiment, the conductive connector 9 is a C-shaped component. Both ends of the conductive connector 9 pass through the adapted fourth through hole in the tail end support block 4, and are respectively connected to the other ends of the corresponding set of two resistance wires 5. During assembly, the conductive connector 9 is inserted from the end of the tail end support block 4 away from the middle support block 3, and then both ends are connected to the ends of the corresponding set of two resistance wires 5. Assembly is relatively quick and convenient.

[0037] In this embodiment, an insulating end cap 20 is attached to the end of the tail support block 4. The grounding member 8 passes through the end cap 20 and is detachably connected to the end cap 20 by a fastener 10. The design of the end cap 20 covers the exposed part of the conductive connector 9, resulting in good insulation.

[0038] In this embodiment, the aforementioned first-end support block 1, cold-end support block 2, multiple intermediate support blocks 3, and tail-end support block 4 are all magnesium oxide ceramic components, which have better insulation effects.

[0039] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An improved electric heating core, characterized in that: The system includes a support assembly, multiple sets of resistance wires (5), columnar and conductive cold ends (6), columnar and conductive tail ends (7), and strip-shaped grounding components (8). The support assembly includes insulated head support blocks (1), cold end support blocks (2), multiple intermediate support blocks (3), and tail end support blocks (4) arranged in a straight line. Multiple sets of cold ends (6) and tail ends (7) are provided, each corresponding to one set of resistance wires (5). Each set of resistance wires (5) has two wires, which pass through the first through holes adapted in the multiple intermediate support blocks (3). Each set of cold ends (6) and tail ends (7) passes through the second through holes adapted in the head support block (1) and cold end support block (2), respectively. Each set of cold ends (6) corresponds to the set of resistance wires (5). One end of one of the resistance wires (5) is connected, and the tail end (7) of each group is connected to one end of the other resistance wire (5) of the corresponding group. The tail end support block (4) is provided with a conductive connector (9) corresponding to each group of resistance wires (5). The other ends of the two resistance wires (5) in each group are respectively connected to the corresponding conductive connector (9). The grounding component (8) passes through the third through hole adapted on the first end support block (1), the cold end support block (2), the multiple intermediate support blocks (3) and the tail end support block (4). The first end support block (1), the cold end support block (2), the multiple intermediate support blocks (3) and the tail end support block (4) are detachably connected to the grounding component (8) by fasteners (10).

2. The improved electric heating core according to claim 1, characterized in that: The cold end support block (2) is provided in multiple parts.

3. The improved electric heating core according to claim 1, characterized in that: The resistance wire (5) is provided in three sets, and the three sets of resistance wire (5) are distributed in the middle area and on both sides of the cross section of the support component, and the three sets of resistance wire (5) are staggered vertically.

4. An improved electric heating core according to claim 1, characterized in that: The grounding component (8) is a grounding flat iron, and the third through hole is set close to the edge of the first end support block (1), the cold end support block (2), the multiple intermediate support blocks (3) and the tail end support block (4).

5. An improved electric heating core according to claim 1, characterized in that: The fastener (10) is a bolt. The first end support block (1), the cold end support block (2), the middle support block (3) and the tail end support block (4) are vertically provided on the same side with bolt holes that communicate with the third through hole. The fastener (10) is installed in the bolt holes and is threadedly connected to the matching screw hole on the grounding component (8).

6. An improved electric heating core according to claim 1, characterized in that: One end of the first end support block (1), the cold end support block (2), the middle support block (3) and the tail end support block (4) are integrally formed with a protruding positioning part corresponding to the part of the grounding member (8). The other end of the first end support block (1), the cold end support block (2), the middle support block (3) and the tail end support block (4) are provided with a fitting groove adapted to the positioning part, and the positioning part is embedded in the adjacent fitting groove.

7. An improved electric heating core according to claim 1, characterized in that: The cold end (6) is a cylindrical component with threads on its surface. The cold end (6) passes through the two ends of the first end support block (1) and / or the cold end support block (2) and is threaded with a first tightening nut (61). The tail end (7) is a cylindrical component with threads on its surface. The tail end (7) is threaded with a second tightening nut (71) at both ends of the first end support block (1) and / or the cold end support block (2).

8. An improved electric heating core according to claim 1, characterized in that: The conductive connector (9) is a C-shaped component. Both ends of the conductive connector (9) pass through the fourth through hole adapted in the tail end support block (4) and are respectively connected to the other end of the corresponding set of two resistance wires (5).

9. An improved electric heating core according to claim 1, characterized in that: An insulating end cap (20) is attached to the end of the tail support block (4). The grounding member (8) passes through the end cap (20) and is detachably connected to the end cap (20) by a fastener (10).

10. The improved electric heating core according to any one of claims 1 to 9, characterized in that: The head support block (1), cold end support block (2), multiple intermediate support blocks (3) and tail end support block (4) are magnesium oxide ceramic components.

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