Fusing current-limiting aluminum bar structure

Abstract

The utility model relates to the technical field of aluminum bar structures, in particular to a fusible current-limiting aluminum bar structure, which comprises an aluminum bar body, the aluminum bar body is formed by connecting a plurality of aluminum bars, an external connection plate is arranged on the right side of the aluminum bar body, a plurality of mounting holes are arranged on the aluminum bar body, and alloy blocks are mounted on the inner sides of the mounting holes. The melting point of the alloy block is smaller than that of the aluminum bar body, the mounting hole is a round hole and is a stepped hole, the alloy block is matched and attached to the stepped hole, and when the alloy block is embedded into the inner side of the aluminum bar body, the end faces of the front side and the rear side of the alloy block and the end faces of the front side and the rear side of the aluminum bar body are located on the same plane. Under the abnormal working condition, the alloy block is firstly melted and separated, so that the aluminum bar body is melted after the temperature of the aluminum bar body rises rapidly, the melting time of the aluminum bar under the condition of short circuit can be shortened, and the aluminum bar has the advantages of small size and low cost, can bear larger current density, and can be used for manufacturing the aluminum bar. The practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum bar structures, in particular to a fusible current-limiting aluminum bar structure. Background Art

[0002] A fuse is an electrical device that uses the heat generated by itself to melt the fuse and disconnect the circuit when the current exceeds the specified value. A fuse is a current protector made based on the principle that after the current exceeds the specified value for a period of time, the heat generated by itself will melt the fuse and disconnect the circuit. Fuses are widely used in high and low voltage power distribution systems and control systems as well as electrical equipment. As a short circuit and overcurrent protector, it is one of the most commonly used protection devices.

[0003] The common fuses on the market are large in size, which makes it difficult to fix them in a limited space and has a high cost. In addition, although some designed small-sized fuses meet the requirements of the appearance, their current capacity is insufficient and the resistivity is large, which cannot meet the needs of large current use. Therefore, a fusible current-limiting aluminum bar structure is proposed to address the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a fusible current-limiting aluminum bar structure to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A fusible current-limiting aluminum bar structure, comprising:

[0007] The aluminum bar body is composed of multiple aluminum bars connected together. An external connection plate is arranged on the right side of the aluminum bar body. Multiple mounting holes are arranged on the aluminum bar body. Alloy blocks are installed inside the mounting holes.

[0008] The melting point of the alloy block is lower than the melting point of the aluminum bar body.

[0009] As a preferred solution, the mounting hole is a circular hole, the mounting hole adopts a stepped hole, and the alloy block matches the stepped hole.

[0010] As a preferred solution, when the alloy block is embedded in the inner side of the aluminum bar body, the front and rear end faces of the alloy block are on the same plane as the front and rear end faces of the aluminum bar body.

[0011] As a preferred solution, the alloy block is mounted on the mounting hole by bonding, welding, interference fit or threading.

[0012] As a preferred solution, a fixing hole is provided on the external plate, and the fixing hole is an elliptical hole.

[0013] As a preferred solution, sealant is applied at the connection between the two side end faces of the alloy block and the aluminum bar body.

[0014] It can be seen from the technical solution provided by the utility model that the utility model provides a fusible current-limiting aluminum bar structure, which has the following beneficial effects:

[0015] 1. The aluminum bar structure is small in size, low in cost, can withstand a large current density, and is highly practical;

[0016] 2. By adopting the structure of aluminum bar and alloy inlay, the temperature rise of the aluminum bar body can be guaranteed within the allowable range under normal working conditions. Under abnormal working conditions, the alloy block will melt and separate first, causing the temperature of the aluminum bar body to rise rapidly and then melt, which can shorten the melting time of the aluminum bar in the case of short circuit;

[0017] 3. A thermal fuse is formed by adopting an aluminum bar and alloy inlay structure, which can replace the fuse and reduce the size and space occupied by the fuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a fusible current-limiting aluminum bar structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure of an alloy block with a fusible current-limiting aluminum bar structure according to the utility model;

[0020] Figure 3 The utility model is a schematic diagram of the installation of an alloy block of a fusible current-limiting aluminum bar.

[0021] In the figure: 1. Aluminum bar body; 11. Mounting hole; 12. External plate; 13. Fixing hole; 2. Alloy block. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0024] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] 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 one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0026] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] like Figure 1-3 As shown, the embodiment of the utility model provides a fusible current-limiting aluminum bar structure, comprising: an aluminum bar body 1, the aluminum bar body 1 is composed of a plurality of aluminum bars connected together, an external connection plate 12 is arranged on the right side of the aluminum bar body 1, a plurality of mounting holes 11 are arranged on the aluminum bar body 1, and an alloy block 2 is installed inside the mounting hole 11;

[0028] The melting point of the alloy block 2 is lower than the melting point of the aluminum bar body 1.

[0029] The mounting hole 11 is a circular hole, and the mounting hole 11 is a stepped hole, and the alloy block 2 matches and fits the stepped hole.

[0030] When the alloy block 2 is embedded in the inner side of the aluminum bar body 1, the front and rear end faces of the alloy block 2 are in the same plane as the front and rear end faces of the aluminum bar body 1.

[0031] The alloy block 2 is mounted on the mounting hole 11 by bonding, welding, interference fit or threading.

[0032] The external board 12 is provided with a fixing hole 13 , which is an elliptical hole.

[0033] Sealant is applied to the joints between the two side end surfaces of the alloy block 2 and the aluminum bar body 1.

[0034] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0035] In one embodiment, see Figure 1, including: an aluminum bar body 1, the aluminum bar body 1 is composed of multiple aluminum bars connected together, an external plate 12 is arranged on the right side of the aluminum bar body 1, and a plurality of mounting holes 11 are arranged on the aluminum bar body 1.

[0036] In one embodiment, see Figure 1 , Figure 2 An alloy block 2 is installed inside the mounting hole 11. The melting point of the alloy block 2 is lower than that of the aluminum bar body 1. Under normal conditions, the aluminum bar body 1 has supporting and conductive functions, and the alloy block has a conductive function. Under high current conditions, the alloy block 2 first melts and falls off, causing the conductive cross-section of the aluminum bar body 1 to decrease rapidly, thereby causing the aluminum bar body 1 to heat up quickly and melt, thereby cutting off the circuit.

[0037] In one embodiment, see Figure 1 , Figure 2 When the alloy block 2 is embedded in the inner side of the aluminum bar body 1, the front and rear end faces of the alloy block 2 are on the same plane as the front and rear end faces of the aluminum bar body 1. Sealant is applied to the connection between the end faces of the alloy block 2 and the aluminum bar body 1 to prevent water from seeping in.

[0038] In one embodiment, see Figure 3 The alloy block 2 is mounted on the mounting hole 11 by bonding, welding, interference fit or threading. A fixing hole 13 is provided on the external plate 12. The fixing hole is used to fix the aluminum bar body and can be fixed by bolts. The fixing hole 13 is an elliptical hole.

[0039] The working principle of this embodiment is: the aluminum bar body 1 and the alloy block 2 conduct electricity together. At this time, the alloy temperature is lower than the melting point of the alloy block 2, and it can work normally. When the short-circuit current passes, the temperature of the alloy block 2 rises, melts and shrinks, and the alloy block 2 and the aluminum bar body 1 are separated under the action of gravity. The aluminum bar body 1 is heated by the short-circuit current, and melts after the temperature exceeds the melting point of the aluminum bar body 1, and the power is cut off.

[0040] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fusible current-limiting aluminum bar structure, characterized in that: include: An aluminum bar body (1), the aluminum bar body (1) being composed of a plurality of aluminum bars connected together, an external connection plate (12) being provided on the right side of the aluminum bar body (1), a plurality of mounting holes (11) being provided on the aluminum bar body (1), and alloy blocks (2) being installed inside the mounting holes (11); The melting point of the alloy block (2) is lower than the melting point of the aluminum bar body (1).

2. A fusible current-limiting aluminum bar structure according to claim 1, characterized in that: The mounting hole (11) is a circular hole, the mounting hole (11) is a stepped hole, and the alloy block (2) matches and fits the stepped hole.

3. A fusible current-limiting aluminum bar structure according to claim 1, characterized in that: When the alloy block (2) is embedded in the inner side of the aluminum bar body (1), the front and rear end surfaces of the alloy block (2) and the front and rear end surfaces of the aluminum bar body (1) are on the same plane.

4. The fusible current-limiting aluminum bar structure according to claim 1, characterized in that: The alloy block (2) is mounted on the mounting hole (11) by bonding, welding, interference fit or threading.

5. The fusible current-limiting aluminum bar structure according to claim 1, characterized in that: The external connection plate (12) is provided with a fixing hole (13), and the fixing hole (13) is an elliptical hole.

6. A fusible current-limiting aluminum bar structure according to claim 2, characterized in that: Sealant is applied at the connection between the two side end surfaces of the alloy block (2) and the aluminum bar body (1).

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