Fuse suitable for locomotive

Abstract

A fuse suitable for a locomotive comprises a mounting seat, one end of the mounting seat is fixedly connected with a nut, a step is arranged in the nut, the step is fixedly connected with the mounting seat, an annular cavity is formed between the step and the nut, a through threaded hole is formed in the wall body of the nut, and the nut is fixedly connected with the mounting seat through the threaded hole. One end of an external pipeline is inserted into the annular cavity, the pipeline is just clamped in the annular cavity formed by the step and the nut at the moment, the external pipeline and the device are tightly combined into a whole, and the situation that when a fire disaster occurs, heat is transmitted through the external pipeline, and then normal operation of other devices of a locomotive is affected is prevented. According to the utility model, the fuse is arranged in the protection tube, so that the protection tube can be inserted into the center of high-temperature equipment in a locomotive for detection, the detection efficiency is high, the heat conduction is fast, and the response speed is fast.

Description

Technical Field

[0001] The utility model relates to the field of electrical protection devices, in particular to a fuse suitable for locomotives. Background Art

[0002] A fuse is an electrical device that uses the heat generated by itself to melt the fuse element and disconnect the circuit when the current exceeds the specified value. A fuse is a current protector made using this principle. 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, they are one of the most commonly used protective devices.

[0003] At present, fuses are also widely used in high-speed rail locomotives as detection and early warning. Due to the specific structure of high-speed rail locomotives, fuses are connected to external pipes and have unique requirements for the installation and use of fuses. When the locomotive generates flames or high temperatures due to excessive current, after the fuse is loosened, the high temperature or flames will cause damage to nearby equipment. Utility Model Content

[0004] The purpose of the present utility model is to provide a fuse suitable for locomotives to solve the problems raised in the above background technology.

[0005] The utility model solves the technical problem by adopting the following technical solutions:

[0006] A fuse suitable for a locomotive comprises a mounting base, one end of the mounting base being fixedly connected to a nut, a step being provided inside the nut, the step being fixedly connected to the mounting base, an annular cavity being formed between the step and the nut, a threaded hole being provided through the wall of the nut, a set screw being provided in the threaded hole, the set screw being adjustable and movable in the threaded hole, a protective tube being provided through the interior of the mounting base, the protective tube extending to the outside of the mounting base, a fuse being provided in the inner cavity of the protective tube, both ends of the fuse being connected by crimping a wire, the wire extending to the outside through the protective tube, the fuse in the protective tube being sealed in the middle portion of the inner length of the protective tube by means of sealing glue, and the sealed portion of the inner cavity of the protective tube being filled with thermal conductive silicone grease.

[0007] Preferably, the outer wall of the mounting seat is provided with threads, and the mounting seat can be connected to the device to be detected through the threads.

[0008] Preferably, a gasket is fixedly installed on the surface of the step, and the gasket can increase friction and sealing.

[0009] Preferably, the end of the protection tube is polished by argon arc welding to ensure the service life of the end.

[0010] The advantages and positive effects of the utility model are:

[0011] 1. The utility model inserts one end of the external pipe into the annular cavity. At this time, the pipe is stuck in the annular cavity composed of the step and the nut, and the external pipe and the device are tightly combined into a whole. This prevents heat from being transferred through the external pipe when a fire occurs, thereby preventing the normal operation of other locomotive equipment, and reduces damage to the wires, thereby preventing the fire from spreading to the greatest extent.

[0012] 2. The utility model uses a fuse provided inside the protective tube, so that the protective tube can be inserted into the center of the high-temperature equipment in the locomotive for detection, with high detection efficiency, fast heat conduction and fast response speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the overall main structure of a fuse suitable for locomotives in the utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0016] Figure 3 For this utility model Figure 2 Middle A is a schematic diagram of the enlarged structure;

[0017] Figure 4 For this utility model Figure 1 Schematic diagram of the structure at the middle BB.

[0018] The markings in the accompanying drawings are described as follows: 10, mounting seat; 11, thread; 12, nut; 13, protective tube; 14, threaded hole; 15, set screw: 16, step; 17, gasket; 18, annular cavity: 19, fuse: 20, wire. DETAILED DESCRIPTION

[0019] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0020] The following combination Figure 1-4 The utility model is described in detail. For the convenience of description, the directions mentioned below are defined as follows: the up, down, left, right, front and back directions mentioned below are the same as Figure 1 The front, back, left, right, up and down directions of the view are consistent. Figure 1This is a front view of the device of the utility model. Figure 1 The directions shown are consistent with the front, back, left, right, up and down directions of the device of the present invention when viewed from the front.

[0021] The following is a further description of the embodiments of the present invention with reference to the accompanying drawings:

[0022] See also Figure 1-4 , the utility model provides an embodiment: a fuse suitable for a locomotive, comprising a mounting seat 10, one end of the mounting seat 10 is fixedly connected to a nut 12, a step 16 is provided inside the nut 12, the step 16 is fixedly connected to the mounting seat 10, an annular cavity 18 is formed between the step 16 and the nut 12, a threaded hole 14 is provided on the wall of the nut 12, a set screw 15 is provided in the threaded hole 14, and the set screw 15 can be adjusted and moved in the threaded hole 14, a protective tube 13 is passed through the interior of the mounting seat 10, the protective tube 13 extends to the outside of the mounting seat 10, a fuse 19 is provided in the inner cavity of the protective tube 13, both ends of the fuse 19 are crimped and connected by a wire 20, the wire 20 extends to the outside through the protective tube 13, the fuse 19 in the protective tube 13 is sealed by sealing glue in the middle part of the internal length of the protective tube 13, and the sealing part of the inner cavity of the protective tube 13 is filled with thermal conductive silicone grease.

[0023] In addition, in one embodiment, a thread 11 is provided on the outer wall of the mounting seat 10 , and the mounting seat 10 can be connected to the device to be detected through the thread 11 .

[0024] In addition, in one embodiment, a gasket 17 is fixedly installed on the surface of the step 16, and the gasket 17 can increase friction and sealing properties.

[0025] In addition, in one embodiment, the end of the protection tube 13 is polished by argon arc welding to ensure the service life of the end.

[0026] During specific implementation, when the device is in use, the thread 11 is connected to the equipment to be tested through a threaded manner, so that the protective tube 13 is located in the area to be tested. During operation, the equipment to be tested is in a high temperature environment for a long time. If a fire occurs, the heat is transferred to the fuse 19 through the protective tube 13, and the fuse 19 is blown. The signal is then transmitted to the external device through the wire 20, thereby knowing the current situation of the equipment to be tested. Since this equipment is installed in a high temperature and vibration environment, an external pipe is connected to the equipment for installation and use. One end of the external pipe is inserted into the annular cavity 18. At this time, the pipe is just stuck in the annular cavity 18 formed by the step 16 and the nut 12. At this time, the locking screw 15 is rotated, and the locking screw 15 moves in the threaded hole 14, so that the locking screw 15 contacts and resists the external pipe to prevent loosening and loose sealing, etc., to avoid heat being transferred to nearby equipment through the external pipe when a fire occurs, and to damage the wire, thereby preventing the fire from spreading.

[0027] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention is not limited to the embodiments described in the specific implementation methods. Any other implementation methods derived by those skilled in the art based on the technical solution of the present invention also fall within the scope of protection of the present invention.

Claims

1. A fuse suitable for locomotive, comprising a mounting base (10), characterized in that: One end of the mounting seat (10) is fixedly connected to a nut (12), a step (16) is provided inside the nut (12), the step (16) is fixedly connected to the mounting seat (10), an annular cavity (18) is formed between the step (16) and the nut (12), a threaded hole (14) is provided through the wall of the nut (12), a set screw (15) is provided in the threaded hole (14), and the set screw (15) can be adjusted and moved in the threaded hole (14), and the mounting seat (10) A protective tube (13) is provided through the interior, and the protective tube (13) extends to the outside of the mounting seat (10). A fuse (19) is provided in the inner cavity of the protective tube (13), and the two ends of the fuse (19) are crimped and connected by a wire (20). The wire (20) extends to the outside through the protective tube (13). The fuse (19) in the protective tube (13) is sealed by sealing glue in the middle part of the inner length of the protective tube (13), and the sealed part of the inner cavity of the protective tube (13) is filled with thermal conductive silicone grease.

2. A fuse suitable for locomotives according to claim 1, characterized in that: The outer wall of the mounting seat (10) is provided with a thread (11), and can be connected and installed with the device to be detected through the thread (11).

3. A fuse suitable for locomotives according to claim 1, characterized in that: A gasket (17) is fixedly mounted on the surface of the step (16).

4. A fuse suitable for locomotives according to claim 1, characterized in that: The end of the protection tube (13) is polished by argon arc welding to ensure the service life of the end.

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