A resistance tube for bridging wiring

Abstract

This utility model relates to the field of resistor technology, specifically to a resistor tube with overlapping wiring, comprising an insulated support tube and a resistor strip spirally wound around the support tube. The resistor strip is an exposed metal strip, comprising integrally formed, continuously bent, alternately bent main body segments and connecting segments. The main body segments maintain a straight shape due to their own strength, while the connecting segments are arc-shaped. Adjacent main body segments are connected via the connecting segments and arranged in a V-shape. Multiple positioning grooves are formed on the outer side of the support tube, and the middle of each main body segment overlaps and is embedded in the positioning grooves. The elasticity of the connecting segments clamps adjacent main body segments tightly against the support tube. Compared with existing technologies, the resistor strip is directly exposed to air for heat dissipation, resulting in higher power density. It eliminates the need for the outer shell and magnesium oxide insulating powder of existing load resistor tubes, reducing the influencing factors of insulation and failure issues. It eliminates the need to consider the high-temperature insulation failure of magnesium oxide powder and problems caused by shell corrosion.

Description

Technical Field

[0001] This utility model relates to the field of resistor technology, specifically to a resistor tube with overlapping wiring. Background Technology

[0002] A load cell is a power testing device primarily used for load testing and maintenance of generators, uninterruptible power supplies (UPS), batteries, and power transmission equipment. It is a tool for periodic testing and maintenance of generator sets and UPS systems. It can be used for load testing in hospitals, data centers, factories, and other enterprises.

[0003] Existing resistor units in load cells typically use wire-wound resistors or chip resistors. Wire-wound resistors consist of a support rod and a resistance wire spirally wound around the support rod. Because the resistance wire is tightly attached to the support rod, a large amount of heat from the resistance wire is transferred to the support rod, requiring additional cooling for the support rod. During the research and development process, the inventors discovered the need to improve the heat dissipation performance of tubular resistors. Summary of the Invention

[0004] In view of the above-mentioned technical problems, the present invention provides a resistor tube with overlapping wiring.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A resistor tube for overlapping wiring is provided, comprising an insulated support tube and a resistor strip spirally wound around the support tube. The resistor strip is characterized by being an exposed metal strip, comprising integrally formed, continuously bent, alternately bent main body segments and connecting segments. The main body segments maintain a straight shape due to their own strength, while the connecting segments are arc-shaped. Adjacent main body segments are connected via the connecting segments and arranged in a V-shape. Multiple positioning grooves are provided on the outer side of the support tube, and the middle sections of each main body segment overlap and are embedded in the positioning grooves. The elasticity of the connecting segments causes adjacent main body segments to clamp the support tube.

[0007] As a further alternative, the groove wall of the positioning groove can be fitted and conformed to the outer wall of the main body section.

[0008] As a further alternative, the cross-section of the resistor strip can be circular, polygonal, or elliptical.

[0009] As a further alternative, the resistor strips can be made of uniform thickness.

[0010] As a further alternative, the main body section is not uniformly thinned, gradually tapering from the overlapping support pipe towards the connecting section.

[0011] As a further alternative, the diameter of the connecting section is smaller than that of the main section.

[0012] As a further alternative, lead-out rings are provided at both ends of the resistor strip.

[0013] As a further alternative, the support tube can be a ceramic tube or a mica tube.

[0014] As a further alternative, the support tube is fitted with screws that extend from both ends of the support tube.

[0015] As a further optional solution, ceramic rings and nuts are fitted onto both ends of the screw that protrude from the support tube.

[0016] The beneficial effects of this utility model are:

[0017] This utility model discloses a resistor tube with overlapping wiring. Compared with existing technologies, the resistor strip is wound on a support tube, ensuring stable strength. The support tube has positioning grooves to prevent adjacent sections of the resistor strip from touching, ensuring product reliability. The resistor strip is directly exposed to air for heat dissipation, resulting in higher power density. Without the outer shell and magnesium oxide insulating powder of existing load resistor tubes, the factors influencing insulation and failure are reduced significantly. There is no need to consider the high-temperature insulation failure of magnesium oxide powder, nor issues caused by shell corrosion. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a resistor tube with overlapping wiring in one embodiment, where the ceramic ring and nut are simplified.

[0019] Figure 2 This is an exploded view of a resistor tube with overlapping wiring in one embodiment, where the resistor strip is hidden.

[0020] Figure 3 This is a side view of a resistor tube with overlapping wiring in one embodiment.

[0021] Figure 4 This is a schematic diagram of the resistor strip in the embodiment.

[0022] Figure label:

[0023] Support tube 11, positioning groove 111;

[0024] Resistance bar 12, main body section 121, connecting section 122, lead-out ring 123;

[0025] 13. Screw; 14. Ceramic ring; 15. Nut. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0027] This embodiment uses a resistor tube with overlapping wiring, such as... Figures 1 to 4 As shown, the device includes an insulated support tube 11 and a resistor strip 12 spirally wound around the support tube 11. The resistor strip 12 is an exposed metal strip and includes an integral, continuously bent, alternately bent main body section 121 and a connecting section 122. The main body section 121 maintains a straight shape by its own strength, and the connecting section 122 is arc-shaped and has a certain degree of elasticity. Adjacent main body sections 121 are connected by the connecting section 122 and arranged in a V-shape. Multiple positioning grooves 111 are opened on the outer side of the support tube 11. The middle part of each main body section 121 overlaps and is embedded in the positioning groove 111. The elasticity of the connecting section 122 causes adjacent main body sections 121 to clamp the support tube 11.

[0028] Specifically, the groove wall of the positioning groove 111 is adapted to fit the outer wall of the main body section 121.

[0029] Specifically, the cross-section of resistor strip 12 is circular, but it can actually be changed to a polygon or an ellipse.

[0030] Specifically, the resistor strip 12 is uniformly thick. In practice, this can be modified so that the main body segment 121 is non-uniformly thick, gradually tapering from the overlapping support tube 11 towards the connecting segment 122. Further modification involves making the diameter of the connecting segment 122 smaller than that of the main body segment 121 for easier bending. For straight metal strips, the diameter is first stretched and reduced at a preset position (corresponding to the connecting segment 122) before being bent into the resistor strip 12.

[0031] Specifically, lead-out rings 123 are provided at both ends of the resistor strip 12.

[0032] Specifically, the support tube 11 is a ceramic tube or a mica tube.

[0033] Specifically, a screw 13 is inserted through the support tube 11, and the screw 13 extends from both ends of the support tube 11. Ceramic rings 14 and nuts 15 are fitted at the two ends of the screw 13 that extend through the support tube 11. The ceramic rings 14 are convex in shape, and they fit over the screw 13 and abut against the end face of the support tube 11. The nuts 15 are threadedly engaged with the screw 13. The ceramic rings 14 and nuts 15 are used to fix the entire resistor tube to the support frame.

[0034] In the description of this utility model, it is obvious that the described embodiments are only a part of the embodiments of this utility model, and not all of them. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] In the description of this utility model, it should be noted that the terms "middle," "upper," "lower," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. 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, or a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A resistor tube with overlapping wiring, comprising an insulating support tube (11) and a resistor strip (12) spirally wound around the support tube (11), characterized in that: The resistor strip (12) is an exposed metal strip. The resistor strip (12) includes a main body section (121) and a connecting section (122) that are continuously bent and alternately arranged. The main body section (121) maintains a straight shape by its own strength. The connecting section (122) is arc-shaped. Adjacent main body sections (121) are connected by the connecting section (122) and arranged in a V-shape. Multiple positioning grooves (111) are opened on the outside of the support tube (11). The middle part of each main body section (121) is overlapped and embedded in the positioning groove (111). The elasticity of the connecting section (122) causes adjacent main body sections (121) to clamp the support tube (11).

2. A resistance tube for bridging a circuit according to claim 1, characterized in that: The groove wall of the positioning groove (111) is adapted to fit the outer wall of the main body section (121).

3. A resistance tube for bridging wiring according to claim 1, characterized in that: The cross-section of the resistor strip (12) is circular or polygonal.

4. A resistance tube for bridging wiring according to claim 1, characterized in that: The cross-section of the resistor bar (12) is elliptical.

5. A resistance tube for bridging wiring according to claim 1, characterized in that: The thickness of the resistor strip (12) is set uniformly.

6. A resistance tube for bridging wiring according to claim 1, characterized in that: The thickness of the main body section (121) is not uniform, and it gradually becomes thinner from the part of the overlapping support pipe (11) towards the connecting section (122).

7. A resistor tube with overlapping wiring according to claim 1, characterized in that: The diameter of the connecting section (122) is smaller than that of the main section (121).

8. A resistance tube for bridging wiring according to claim 1, characterized in that: The resistor bar (12) has lead-out rings (123) at both ends.

9. A resistance tube for bridging wiring according to claim 1, characterized in that: The support tube (11) is a ceramic tube or a mica tube.

10. A resistance tube for use in a bridging circuit as claimed in claim 1, characterized in that: A screw (13) is inserted through the support tube (11), and the screw (13) extends from both ends of the support tube (11).

11. A resistance tube for use in a bridging arrangement according to claim 10, characterised in that: Ceramic rings (14) and nuts (15) are fitted at both ends of the screw (13) that protrude from the support tube (11).

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