Conducting wire joint structure of molybdenum disilicide electric heating element

Abstract

The utility model discloses a molybdenum disilicide electric heating element wire joint structure, which is arranged at the top of a cold end element, the bottom of the cold end element is welded with a hot end element through a connecting part, and the structure comprises a connecting cylinder welded at the top of the cold end element. A metal connecting column is inserted into a connecting cylinder at the top of a cold-end element and slides on the surface of a guide column through guide grooves formed in the bottoms of the two sides of the metal connecting column, and when the metal connecting column slides to the bottom of an inner cavity of the connecting cylinder, a limiting bolt penetrates through a through hole, so that the limiting bolt is in threaded connection with the inner surface of a threaded hole; therefore, the metal connecting column and the cold end element are stably connected, the mode that a fastening screw is connected with a metal wire in a pressing mode is replaced, finally, the connecting position between the metal connecting column and the cold end element is blocked and protected through the protection assembly, through the arrangement of the structure, the stability of the connecting point is improved, and the purpose of avoiding looseness is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of molybdenum disilicide electric heating elements, in particular to a molybdenum disilicide electric heating element wire joint structure. Background Art

[0002] Molybdenum disilicide heating element is a high-performance heating element with the advantages of high temperature resistance, oxidation resistance, and stable resistance characteristics. It is often used in industrial heating equipment such as high-temperature electric furnaces and kilns, and can work stably for a long time in harsh high-temperature environments.

[0003] The wire connection end of the component is connected to the wire by crimping, that is, the metal wire in the wire is crimped by a fastening screw. When this method is used for a long time, the connection may become loose due to oxidation, causing the metal wire and the connector to become loose, thereby causing the contact surface to become loose. In severe cases, there will be a lack of electricity. Utility Model Content

[0004] The utility model aims to provide a molybdenum disilicide electric heating element wire joint structure, which has the purpose of improving the stability of the connection point, thereby avoiding looseness, so as to solve the above-mentioned background technical problems.

[0005] The utility model solves the above-mentioned technical problem with the following technical solutions: a molybdenum disilicide electric heating element wire joint structure, which is arranged at the top of a cold end element, and a hot end element is welded to the bottom of the cold end element through a connecting portion, and the structure comprises a connecting tube welded to the top of the cold end element, guide columns are integrally fixedly connected to both sides of the inner cavity of the connecting tube, a through hole is provided inside the guide column, and a matching metal connecting column is provided inside the connecting tube, and guide grooves are provided at the bottoms on both sides of the surface of the metal connecting column, and the guide grooves are slidably connected to the outer surface of the guide column when the metal connecting column moves downward, and threaded holes are provided on the inner surface of the guide groove and at positions corresponding to the through holes, and a limiting bolt is threadedly connected to the inner surface of the threaded hole, and the outer end face of the limiting bolt passes through the connecting tube and extends to the outside of the connecting tube, and a protective component may be provided on the surface between the metal connecting column and the cold end element.

[0006] Preferably, the protection assembly comprises two protection covers, and both protection covers are located at the connection between the metal connecting column and the cold end element.

[0007] Preferably, the protective covers are threadedly connected by a plurality of mounting bolts, and sealing rings are provided at upper and lower ports on the inner surfaces of the protective covers, and the inner surfaces of the sealing rings are tightly fitted with the outer surfaces of the metal connecting column and the cold end element.

[0008] Preferably, the metal connecting column is welded to the external device wire by soldering, and the welding position is designed to be anti-insulation.

[0009] Preferably, the connecting tube is designed as a hollow structure, and the bottom of the inner cavity of the connecting tube is tightly fitted with the bottom end surface of the metal connecting column.

[0010] The beneficial effects of the utility model are:

[0011] The utility model inserts a metal connecting column into a connecting cylinder at the top of a cold end element, and slides on the surface of the guide column through guide grooves provided at the bottom of both sides of the metal connecting column. When sliding to the bottom of the inner cavity of the connecting cylinder, a limiting bolt passes through the through hole, so that the limiting bolt is threadedly connected to the inner surface of the threaded hole, thereby making the metal connecting column and the cold end element firmly connected, replacing the method of crimping a metal wire with a fastening screw. Finally, a protective component is used to isolate and protect the connection between the metal connecting column and the cold end element. By setting the above structure, the connection point is made more stable, thereby preventing looseness.

[0012] 2. The utility model covers two protective covers together by installing bolts, so that the connection between the metal connecting column and the cold end element is protected, and the sealing ring is filled to reduce the gap between the metal connecting column and the cold end element and the protective cover;

[0013] 3. The utility model uses a metal connection column to weld with an external wire by soldering, and the welding position is designed to prevent insulation, so that the metal wire position of the wire is not exposed to the outside, thereby avoiding leakage;

[0014] 4. The utility model increases the contact area of ​​the contact point by tightly fitting the bottom of the inner cavity with the bottom end surface of the metal connecting column. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] in:

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the protective cover of the utility model;

[0018] Figure 3 This is a schematic diagram of the disassembly of the metal connecting column and the connecting tube of the utility model.

[0019] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0020] 1. Cold end element; 2. Connecting part; 3. Hot end element; 4. Connecting tube; 5. Guide column; 6. Through hole; 7. Metal connecting column; 8. Guide groove; 9. Threaded hole; 10. Limit bolt; 11. Protective cover; 12. Mounting bolt; 13. Sealing ring. DETAILED DESCRIPTION

[0021] Hereinafter, an embodiment of the molybdenum disilicide electric heating element wire joint structure of the present invention will be described with reference to the accompanying drawings. Example

[0022] Figure 1-3A molybdenum disilicide electric heating element wire joint structure of an embodiment of the utility model is shown, the structure is arranged at the top of a cold end element 1, the bottom of the cold end element 1 is welded with a hot end element 3 through a connecting portion 2, the structure includes a connecting tube 4 welded on the top of the cold end element 1, both sides of the inner cavity of the connecting tube 4 are integrally fixedly connected with guide columns 5, the guide columns 5 are provided with a through hole 6, the connecting tube 4 is provided with a matching metal connecting column 7, the metal connecting column 7 is welded to the external wire by soldering, and the welding position is designed to prevent insulation, the metal of the wire can be welded to the external wire by soldering, and the welding position is designed to prevent insulation, The wire position is not exposed to the outside, thereby avoiding leakage. The bottom of the inner cavity is tightly fitted with the bottom end face of the metal connecting column 7 to increase the contact area of ​​the contact point. Guide grooves 8 are provided at the bottom of both sides of the surface of the metal connecting column 7. The connecting cylinder 4 is designed as a hollow structure. The bottom of the inner cavity of the connecting cylinder 4 is tightly fitted with the bottom end face of the metal connecting column 7. The guide groove 8 is slidably connected with the outer surface of the guide column 5 when the metal connecting column 7 moves downward. A threaded hole 9 is provided on the inner surface of the guide groove 8 and at a position corresponding to the through hole 6. The inner surface of the threaded hole 9 is threadedly connected to a limiting bolt 10. The outer end face of the limiting bolt 10 passes through the connecting cylinder 4 and extends to the outside of the connecting cylinder 4. The surface between the metal connecting column 7 and the cold end element 1 may be provided with a protection component, the protection component comprising two protection covers 11, the two protection covers 11 are both located at the connection between the metal connecting column 7 and the cold end element 1, the protection covers 11 are threadedly connected by a plurality of mounting bolts 12, the upper and lower ports on the inner surfaces of the protection covers 11 are both provided with sealing rings 13, the inner surfaces of the sealing rings 13 are both tightly fitted with the outer surfaces of the metal connecting column 7 and the cold end element 1, the two protection covers 11 are covered together by the mounting bolts 12, so that the connection between the metal connecting column 7 and the cold end element 1 is protected, and at the same time, the filling of the sealing ring 13 reduces the metal connecting column 7 and the cold end element 1 The gap between the protective cover 11 is formed by inserting the metal connecting column 7 into the connecting tube 4 at the top of the cold end element 1, and sliding on the surface of the guide column 5 through the guide grooves 8 provided at the bottom of both sides of the metal connecting column 7. When sliding to the bottom of the inner cavity of the connecting tube 4, the limiting bolt 10 passes through the through hole 6, so that the limiting bolt 10 is threadedly connected to the inner surface of the threaded hole 9, thereby making the metal connecting column 7 and the cold end element 1 firmly connected, replacing the method of crimping the metal wire with the tightening screw. Finally, the connection between the metal connecting column 7 and the cold end element 1 is blocked and protected by the protective component. By setting the above structure, the stability of the connection point is improved, thereby avoiding loosening.

[0023] The cold end of the component is 24mm in diameter and 450-500mm in length. The transition part connecting the cold and hot ends of the component is that the cold end 24mm is ground into a - end diameter of 12mm and welded to the hot end. The transition section is 40mm long, the hot end material rod has a diameter of 12mm, the distance between the centers of each two hot ends is 50mm, and the height is 180-200mm.

[0024] Working principle: When the utility model is used, the metal connecting column 7 and the metal wire are welded in advance, and the connection position is insulated by the existing insulation packaging technology. When it is necessary to connect and energize, the metal connecting column 7 is inserted into the connecting tube 4 at the top of the cold end element 1, and slides on the surface of the guide column 5 through the guide grooves 8 opened at the bottom of both sides of the metal connecting column 7. When sliding to the bottom of the inner cavity of the connecting tube 4, the limiting bolt 10 passes through the through hole 6, so that the limiting bolt 10 is threadedly connected to the inner surface of the threaded hole 9, so that the metal connecting column 7 and the cold end element 1 are firmly connected, replacing the method of crimping the metal wire with the fastening screw. Finally, the two protective covers 11 are covered together by the installation bolts 12, so that the connection between the metal connecting column 7 and the cold end element 1 is protected. At the same time, the sealing ring 13 is filled to reduce the gap between the metal connecting column 7 and the cold end element 1 and the protective cover 11, thereby improving the stability of the connection point and avoiding looseness.

Claims

1. A molybdenum disilicide electric heating element wire joint structure, the structure is arranged on the top of a cold end element (1), the bottom of the cold end element (1) is welded with a hot end element (3) through a connecting portion (2), characterized in that: The structure comprises a connecting tube (4) welded to the top of a cold end element (1), guide columns (5) are integrally fixedly connected to both sides of the inner cavity of the connecting tube (4), a through hole (6) is provided inside the guide column (5), a matching metal connecting column (7) is provided inside the connecting tube (4), guide grooves (8) are provided at the bottom of both sides of the surface of the metal connecting column (7), the guide grooves (8) are slidably connected to the outer surface of the guide column (5) when the metal connecting column (7) moves downward, a threaded hole (9) is provided on the inner surface of the guide groove (8) at a position corresponding to the through hole (6), a limit bolt (10) is threadedly connected to the inner surface of the threaded hole (9), the outer end surface of the limit bolt (10) passes through the connecting tube (4) and extends to the outside of the connecting tube (4), and a protective component can be provided on the surface between the metal connecting column (7) and the cold end element (1).

2. A molybdenum disilicide electric heating element wire joint structure according to claim 1, characterized in that: The protection assembly comprises two protection covers (11), and the two protection covers (11) are both located at the connection between the metal connection column (7) and the cold end element (1).

3. A molybdenum disilicide electric heating element wire joint structure according to claim 2, characterized in that: The protective covers (11) are threadedly connected via a plurality of mounting bolts (12); sealing rings (13) are provided at upper and lower ports on the inner surface of the protective cover (11); the inner surface of the sealing ring (13) is tightly fitted to the outer surface of the metal connecting column (7) and the cold end element (1).

4. The molybdenum disilicide electric heating element lead connector structure according to claim 1, characterized in that: The metal connection column (7) is welded to the external device wire by means of soldering, and the welding position is designed to prevent insulation.

5. The molybdenum disilicide electric heating element wire connector structure according to claim 1, characterized in that: The connecting tube (4) is designed as a hollow structure, and the bottom of the inner cavity of the connecting tube (4) is tightly fitted with the bottom end surface of the metal connecting column (7).

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