High-insulativity electric heating core

Abstract

The invention relates to a high-insulativity electric heating core which comprises a supporting assembly, resistance wires, a cold end, a tail end and a grounding piece, the supporting assembly comprises a head end supporting block, a cold end supporting block, a middle supporting block and a tail end supporting block which are nested in a linear shape, each group of resistance wires comprises two resistance wires, a resistance channel is arranged in the supporting assembly, a grounding channel is arranged in the supporting assembly, and the grounding piece is arranged in the grounding channel. The grounding piece is inserted in the grounding channel, the cold end and the tail end are respectively inserted in the resistance channel, the two resistance wires in each group are respectively arranged in the resistance channel, one end of each resistance wire is respectively connected with the cold end and the tail end, and the other end of each resistance wire is respectively connected with the conductive connecting piece in the tail end supporting block; and the head end supporting block, the cold end supporting block, the plurality of middle supporting blocks and the tail end supporting block are respectively connected with the grounding piece through fasteners. The invention has the advantages that a nested structure is formed between the supporting blocks, so that the resistance wire and the conductive accessory are ensured to have enough electrical gaps and are not influenced by deformation and thermal expansion and cold contraction, and high insulativity is formed.

Description

Technical Field

[0001] The invention relates to the technical field of high-temperature resistance electric heaters, in particular to a high-insulation electric heating core. Background Art

[0002] The electric heating core of the high temperature resistance electric heater is usually composed of a resistance wire support block, a resistance wire, a cold end, a tail end, a grounding flat iron and other components. The resistance wire support block is connected in series to the grounding flat iron to form an electric heating core of a certain length, and the resistance wire is supported on the support block. Since there is only a safe electrical gap between the resistance wires and between the resistance wires and the metal shell, it can only work at a voltage of 380V or below, and when the resistance wire is deformed and the electrical gap is too small, the insulation of the electric heating core is likely to be too low, causing tripping.

[0003] Based on this, it is necessary to develop a high-insulation electric heating core to overcome the above technical problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a high-insulation electric heating core, which effectively overcomes the defects of the prior art.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] A high-insulation electric heating core, comprising a support assembly, multiple groups of resistance wires, a columnar and conductive cold end, a columnar and conductive tail end and a strip-shaped grounding piece, the support assembly comprising an insulating head end support block, a cold end support block, multiple middle support blocks and a tail end support block arranged in a "one" sequence and nested with each other, each group of the resistance wires is provided with two, the support assembly is provided with a resistance channel corresponding to each of the resistance wires, the resistance channel runs through both ends of the support assembly, the support assembly is provided with a grounding channel running through both ends, and the grounding piece is inserted in the grounding channel In the middle, one end is exposed outside the above-mentioned head end support block, the above-mentioned cold end and tail end are respectively inserted in the resistance channels passing through the above-mentioned head end support block and the cold end support block, the two above-mentioned resistance wires in each group are respectively installed in the corresponding resistance channels in the multiple above-mentioned intermediate support blocks, and one end of the two above-mentioned resistance wires is respectively connected to the above-mentioned cold end and tail end, and the other ends of the two above-mentioned resistance wires are respectively connected to the conductive connector inserted in the resistance channel in the above-mentioned tail end support block, and the above-mentioned head end support block, cold end support block, multiple intermediate support blocks and tail end support block are respectively connected to the above-mentioned grounding member through fasteners.

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

[0008] Furthermore, the cold end support block is provided in plurality.

[0009] Furthermore, the above-mentioned resistance wire is provided with three groups, and the three groups of the above-mentioned resistance wire are distributed in the middle area and both sides of the cross-section of the above-mentioned support component, and the overall height of the middle group of the above-mentioned resistance wire is higher than the overall height of the two groups of the above-mentioned resistance wire located on both sides, and the above-mentioned grounding channel is located in the middle area of ​​the cross-section of the above-mentioned support component and is arranged close to the edge of the above-mentioned support component.

[0010] Furthermore, a first boss or a first groove is provided at the same end of the head end support block, the cold end support block, the multiple intermediate support blocks and the tail end support block corresponding to the port of each of the above-mentioned resistance channels, and a second groove or a second boss adapted to the first boss or the first groove is provided at the other end of the head end support block, the cold end support block, the multiple intermediate support blocks and the tail end support block, and the second boss is embedded in the adjacent first groove, and a gap is formed between the two, and the first boss is embedded in the adjacent second groove, and a gap is formed between the two.

[0011] Furthermore, the same side of the head end support block, the cold end support block, the middle support block and the tail end support block are provided with bolt holes penetrating into the grounding channel, and the fasteners are fastening bolts threadedly connected in the bolt holes, and the fastening bolts are against the grounding members.

[0012] Furthermore, the cold end is a cylindrical component with threads on its surface, and both ends of the cold end are respectively threaded with first tightening nuts, and the first tightening nuts at both ends are respectively abutted against both ends of the head end support block.

[0013] Furthermore, the tail end is a cylindrical component with threads on its surface, and the two ends of the tail end are respectively threaded with second tightening nuts, and the second tightening nuts at both ends are respectively abutted against the two ends of the head end support block.

[0014] Furthermore, the conductive connector is a C-shaped component, and both ends of the conductive connector respectively pass through the two resistance channels corresponding to the same group in the tail end support block, and the connecting tube of the conductive connector is respectively connected to the other end of a corresponding group of two resistance wires.

[0015] Furthermore, a stopper is installed at one end of the tail end support block away from the middle support block, the grounding channel passes through the stopper, and the stopper is connected to the grounding piece through the fastener.

[0016] Furthermore, the grounding member is a grounding flat iron, and the head end support block, the cold end support block, the plurality of middle support blocks and the tail end support block are all magnesium oxide ceramic components.

[0017] The beneficial effects of the present invention are: the structural design is reasonable, a nested structure is formed between the support blocks, and sufficient electrical clearance is ensured between the resistance wire and the conductive accessories, which are not affected by deformation and thermal expansion and contraction, and high insulation can be formed, thereby improving the operating reliability of the electric heating core, and the electric heating core can operate at a voltage between 380V and 6KV to achieve greater power output. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A structural side view of a high-insulation electric heating core of the present invention;

[0019] Figure 2 A top view of the structure of the high-insulation electric heating core of the present invention;

[0020] Figure 3 A bottom view of the structure of the high-insulation electric heating core of the present invention;

[0021] Figure 4 for Figure 2 Structural cross-section view of the middle AA surface;

[0022] Figure 5 for Figure 2 Structural cross-section view of the middle BB surface;

[0023] Figure 6 for Figure 2 Structural cross-section view of the middle CC plane;

[0024] Figure 7 It is a schematic diagram of the structure of a single resistance wire in the high-insulation electric heating core of the present invention.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1. Head end 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 piece; 9. Conductive connector; 10. Fastener; 41. Stopper; 61. First tightening nut; 71. Second tightening nut; 101. First boss; 102. First groove; 103. Second groove; 104. Second boss. DETAILED DESCRIPTION

[0027] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0028] Example

[0029] like Figure 1 , 2, 3, 4, 5, 6, and 7, the high-insulation electric heating core of this embodiment includes a support assembly, multiple groups of resistance wires 5, a columnar and conductive cold end 6, a columnar and conductive tail end 7, and a strip-shaped grounding piece 8. The support assembly includes an insulating head end support block 1, a cold end support block 2, multiple middle support blocks 3, and a tail end support block 4 arranged in a "one" order and nested with each other, each group of the above-mentioned resistance wires 5 is provided with two, and the support assembly is provided with a resistance channel corresponding to each of the above-mentioned resistance wires 5, the above-mentioned resistance channel runs through the two ends of the above-mentioned support assembly, and the above-mentioned support assembly is provided with a grounding channel running through both ends thereof, and the above-mentioned grounding piece 8 is inserted in the above-mentioned grounding piece 8. The first end support block 1, the second end support block 2, the second end support block 3 and the second end support block 4 are connected to the ground channel, and one end is exposed outside the first end support block 1, the cold end 6 and the tail end 7 are respectively inserted in the resistance channels passing through the first end support block 1 and the cold end support block 2, the two resistance wires 5 in each group are respectively installed in the corresponding resistance channels in the multiple intermediate support blocks 3, and one end of the two resistance wires 5 is respectively connected to the cold end 6 and the tail end 7, the other ends of the two resistance wires 5 are respectively connected to the conductive connector 9 inserted in the resistance channel in 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 respectively connected to the grounding member 8 through the fasteners 10.

[0030] In the high-insulation electric heating core of this embodiment, the cold end 6 and the tail end 7 are inserted into the resistance channels in the head end support block 1 and the cold end support block 2, and the resistance wires 5 are respectively installed in the resistance channels in the multiple middle support blocks 3. One end of each group of two resistance wires 5 is connected to a cold end 6 and a tail end 7 respectively, and the ends of the cold end 6 and the tail end 7 extend out of the head end support block 1 respectively. The other end of each group of two resistance wires 5 is commonly connected to a conductive connector 9, which is installed in the tail end support block 4. When in use, the cold end 6 is connected to the cathode, the tail end 7 is connected to the anode, and the resistance wires 5 are respectively set in independent resistance channels. The overall structural design is reasonable, and the design of the nested structure formed between the support blocks ensures that the resistance wires and the conductive accessories have sufficient electrical clearance, are not affected by deformation and thermal expansion and contraction, can form high insulation, improve the operating reliability of the electric heating core, and the electric heating core can operate at a voltage between 380Vˉ6KV to achieve greater power output.

[0031] In this embodiment, the cold end support blocks 2 are provided in plurality. Since the cold end 6 and the tail end 7 are both columnar components with a certain length, the design of the plurality of cold end support blocks 2 meets the length design requirements of the cold end 6 and the tail end 7.

[0032] In this embodiment, the resistance wire 5 is provided in three groups, and the three groups of the resistance wire 5 are distributed in the middle area and both sides of the cross section of the support assembly, and the overall height of the group of the resistance wire 5 located in the middle is higher than the overall height of the two groups of the resistance wire 5 located on both sides, and the grounding channel is located in the middle area of ​​the cross section of the support assembly and is arranged close to the edge of the support assembly. More specifically, a resistance wire 5 is arranged in the middle of each resistance channel, one end of the resistance channel is respectively provided with a cold end 6 or a tail end 7, and the other end is respectively provided with a conductive connector 9, and both ends of the resistance wire 5 are respectively connected to the cold end 6 or the tail end 7 and the conductive connector 9 as a whole.

[0033] As a preferred embodiment, a first boss 101 or a first groove 102 is provided at the same end of the head end support block 1, the cold end support block 2, the multiple intermediate support blocks 3 and the tail end support block 4 corresponding to the port of each of the above-mentioned resistance channels, and a second groove 103 or a second boss 104 adapted to the first boss 101 or the first groove 102 is provided at the other end of the head end support block 1, the cold end support block 2, the multiple intermediate support blocks 3 and the tail end support block 4, and the second boss 104 is embedded in the adjacent first groove 102, and a gap is formed between the two, and the first boss 101 is embedded in the adjacent second groove 103, and a gap is formed between the two.

[0034] In the above implementation scheme, the design of the first boss 101, the first groove 102, the second groove 103, and the second boss 104 can achieve good nested assembly through the corresponding nesting of the first boss 101 and the second groove 103, or through the corresponding nesting of the first groove 102 and the second boss 104, between the head end support block 1 and the cold end support block 2, between the cold end support block 2 and the cold end support block 2, between the cold end support block 2 and the middle support block 3, between the middle support block 3 and the middle support block 3, and between the middle support block 3 and the tail end support block 4. Such a design makes the ends of the support blocks fit tightly, the internal resistance channels are independent of each other, and ensures that there is always an effective electrical gap between the resistance wires. More specifically, the end of the head end support block 1 away from the cold end support block 2, the end of the cold end support block 2 close to the head end support block 1, the end of the middle support block 3 close to the cold end support block 2, and the end of the tail end support block 4 close to the middle support block 3 are respectively provided with a first boss 101 and a first groove 102 (and the number of the first boss 101 and the first groove 102 are respectively provided with three), the end of the head end support block 1 close to the cold end support block 2, the end of the cold end support block 2 away from the head end support block 1, and the end of the middle support block 3 away from the cold end support block 2 are respectively provided with a second boss 104 and a second groove 103 (and the number of the second boss 104 and the second groove 103 are respectively provided with three), the first boss 101 is nested with the adjacent second groove 103, and the second boss 104 is nested with the adjacent first groove 102.

[0035] In the present embodiment, in the cross section of the support blocks (including the head end support block 1, the cold end support block 2, the multiple middle support blocks 3 and the tail end support block 4), there are three groups of resistance wires 5 horizontally spaced apart in the "left, middle and right" direction, and the two resistance wires 5 in each group are spaced apart in the up and down direction, and the group of resistance wires 5 in the middle is arranged at a high position (higher than the two groups of resistance wires 5 on both sides), and in the two resistance channels corresponding to each group of resistance wires 5: a first boss 101 is arranged at one end port of the resistance channel at the high position, a first groove 102 is arranged at one end port of the resistance channel at the lower position, a second groove 103 is arranged at the other end port of the resistance channel at the high position, and a second boss 104 is arranged at the other end port of the resistance channel at the lower position.

[0036] In this embodiment, the same side of the head end support block 1, the cold end support block 2, the middle support block 3 and the tail end support block 4 are all provided with bolt holes penetrating into the grounding channel, and the fasteners 10 are fastening bolts threadedly connected in the bolt holes, and the fastening bolts abut against the grounding member 8. In other words, each support block abuts against the grounding member 8 through the fastening bolts. Of course, a plurality of screw holes adapted to the fastening bolts can be arranged at intervals along the length direction on the grounding member 8, and the ends of the fastening bolts are screwed into the corresponding screw holes on the grounding member 8.

[0037] In this embodiment, the cold end 6 is a cylindrical component with threads on the surface, and the two ends of the cold end 6 are respectively threaded with first tightening nuts 61, and the first tightening nuts 61 at both ends are respectively abutted against the two ends of the head end support block 1. Through the design of the first tightening nut 61, the cold end 6 is fastened to the head end support block 1.

[0038] In this embodiment, the tail end 7 is a cylindrical component with threads on the surface, and the two ends of the tail end 7 are respectively threaded with second tightening nuts 71, and the second tightening nuts 71 at both ends are respectively abutted against the two ends of the head end support block 1. Through the design of the second tightening nuts 71, the tail end 7 is fastened to the head end support block 1.

[0039] In this embodiment, the conductive connector 9 is a C-shaped component, and the two ends of the conductive connector 9 respectively pass through the two resistance channels corresponding to the same group in the tail end support block 4, and the connecting tubes of the conductive connector 9 are respectively connected to the other ends of a corresponding group of two resistance wires 5.

[0040] In this embodiment, a stopper 41 is installed at one end of the tail support block 4 away from the middle support block 3, the grounding channel runs through the stopper 41, and the stopper 41 is connected to the grounding member 8 through the fastener 10. The design of the stopper 41 can block the resistance channel on the tail support block 4 and improve the protection performance.

[0041] In this embodiment, an engaging groove is provided at the end of the tail end support block 4, and a positioning block engaged with the engaging groove is provided at one end of the stopper 41.

[0042] In this embodiment, the grounding member 8 is a grounding flat iron, and the head end support block 1, the cold end support block 2, the plurality of middle support blocks 3 and the tail end support block 4 are all magnesium oxide ceramic components.

[0043] In addition, the stopper 41 is also made of magnesium oxide ceramic components, which has a good insulation effect.

[0044] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0049] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A high insulation electric heating core, characterized in that: The invention comprises a support assembly, a plurality of groups of resistance wires (5), a columnar and conductive cold end (6), a columnar and conductive tail end (7) and a strip-shaped grounding member (8), wherein the support assembly comprises an insulating head end support block (1), a cold end support block (2), a plurality of intermediate support blocks (3) and a tail end support block (4) arranged in a "one" sequence and nested with each other, each group of the resistance wires (5) is provided with two resistance channels corresponding to each resistance wire (5), the resistance channels passing through the two ends of the support assembly, the support assembly is provided with a grounding channel passing through the two ends, and the grounding member (8) is inserted in the grounding channel, with one end exposed to the head end support block (1). Externally, the cold end (6) and the tail end (7) are respectively inserted into the resistance channels passing through the head end support block (1) and the cold end support block (2); the two resistance wires (5) in each group are respectively installed in the corresponding resistance channels in the plurality of intermediate support blocks (3); one end of the two resistance wires (5) is respectively connected to the cold end (6) and the tail end (7); the other ends of the two resistance wires (5) are respectively connected to the conductive connector (9) inserted in the resistance channel in the tail end support block (4); the head end support block (1), the cold end support block (2), the plurality of intermediate support blocks (3) and the tail end support block (4) are respectively connected to the grounding member (8) via fasteners (10).

2. The high-insulation electric heating core according to claim 1, characterized in that: The cold end support blocks (2) are provided in plurality.

3. The high-insulation electric heating core according to claim 1, characterized in that: The resistance wires (5) are provided in three groups, and the three groups of the resistance wires (5) are distributed in the middle area and both sides of the cross section of the support component, and the overall height of the group of the resistance wires (5) located in the middle is higher than the overall height of the two groups of the resistance wires (5) located on both sides, and the grounding channel is located in the middle area of ​​the cross section of the support component and is arranged close to the edge of the support component.

4. The high-insulation electric heating core according to claim 1, characterized in that: A first boss (101) or a first groove (102) is provided at the same end of the head end support block (1), the cold end support block (2), the plurality of intermediate support blocks (3) and the tail end support block (4) at a position corresponding to the port of each resistance channel; a second groove (103) or a second boss (104) adapted to the first boss (101) or the first groove (102) is provided at the other end of the head end support block (1), the cold end support block (2), the plurality of intermediate support blocks (3) and the tail end support block (4); the second boss (104) is embedded in an adjacent first groove (102) to form a gap therebetween; and the first boss (101) is embedded in an adjacent second groove (103) to form a gap therebetween.

5. The high-insulation electric heating core according to claim 1, characterized in that: The same side of the head end support block (1), the cold end support block (2), the middle support block (3) and the tail end support block (4) are all provided with bolt holes penetrating into the grounding channel, and the fastener (10) is a fastening bolt threadedly connected in the bolt hole, and the fastening bolt abuts against the grounding member (8).

6. The high-insulation electric heating core according to claim 1, characterized in that: The cold end (6) is a cylindrical component with a thread on its surface. The two ends of the cold end (6) are respectively threaded with first tightening nuts (61), and the first tightening nuts (61) at the two ends respectively abut against the two ends of the head end support block (1).

7. The high-insulation electric heating core according to claim 1, characterized in that: The tail end (7) is a cylindrical component with a thread on its surface. The two ends of the tail end (7) are respectively threaded with second tightening nuts (71), and the second tightening nuts (71) at the two ends are respectively abutted against the two ends of the head end support block (1).

8. The high-insulation electric heating core according to claim 1, characterized in that: The conductive connecting member (9) is a C-shaped member, and the two ends of the conductive connecting member (9) respectively penetrate the two resistance channels corresponding to the same group in the tail end support block (4), and the connecting tubes of the conductive connecting member (9) are respectively connected to the other ends of the two resistance wires (5) in a corresponding group.

9. A high-insulation electric heating core according to any one of claims 1 to 8, characterized in that: A stopper (41) is installed at one end of the tail support block (4) away from the middle support block (3); the grounding channel passes through the stopper (41); and the stopper (41) is connected to the grounding member (8) via the fastener (10).

10. A high-insulation electric heating core according to any one of claims 1 to 8, characterized in that: The grounding piece (8) is a grounding flat iron, and the head end support block (1), the cold end support block (2), the plurality of middle support blocks (3) and the tail end support block (4) are all magnesium oxide ceramic components.

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