Flame-retardant safety resistor

Abstract

The utility model relates to the technical field of resistors, in particular to a flame-retardant safety resistor. The device comprises a flame-retardant frame and a storage box, the flame-retardant frame is provided with a flame-retardant cavity and a plurality of discharging channels which are communicated with each other, the flame-retardant frame is in threaded connection with a sealing cover, the flame-retardant frame is rotationally provided with a fixing frame, the fixing frame is provided with a resistor frame, the flame-retardant frame is provided with a resistor rod, and the multiple discharging channels are each provided with a flame-retardant assembly. Resistance columns are detachably arranged on the flame-retardant frame and the fixing frame. The storage box is arranged on the flame-retardant frame, the storage box is provided with a plurality of separation cavities, and a pressurizing assembly is arranged on the storage box. The flame-retardant liquid contained in the flame-retardant frame is sprayed to an ignition point from the molten flame-retardant component through the pressurizing component, so that the loss of a user is prevented from being further increased.

Description

Technical Field

[0001] This utility model relates to the field of resistor technology, and in particular to a flame-retardant fuse resistor. Background Technology

[0002] A fusible resistor functions like a regular resistor under normal conditions. If a circuit malfunctions and the fault exceeds its rated power, it will disconnect the circuit within a specified time, thus protecting other components. Fusible resistors are available in two types: non-repairable and repairable. Their shape resembles a surface-mount resistor, and some are cylindrical.

[0003] Chinese Patent Publication No. CN217822239U discloses a fusible resistor, comprising a resistor body, with resistor side heads at both ends of the resistor body having a diameter larger than that of the resistor body. The resistor side heads are integrally fixed to the resistor body. This technical solution prevents the resistor body from directly contacting the circuit board through a support base and a protective partition plate, thereby protecting the circuitry on the PCB circuit board. Even if the resistor body burns out, the high temperature of the resistor body will prevent damage to the circuitry on the PCB circuit board. Furthermore, the insulating pad prevents the protective partition plate from abrading the solder mask on the PCB circuit board. The resistor leads are inserted into the pads on the PCB circuit board, and the resistor leads are limited by limiting latches to prevent them from being fully inserted into the pads on the PCB circuit board.

[0004] However, the above technical solution has the following problems: when using a fuse resistor, the current generated by a short circuit can easily break down the circuit board and cause it to burn. If the user is not near the fire, the fire can easily grow larger, thus causing danger. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a flame-retardant fuse resistor that uses a pressurizing component to spray the flame-retardant liquid contained in the flame-retardant frame from the melted flame-retardant component to the ignition point, thereby preventing user losses.

[0006] The technical solution of this utility model is a flame-retardant fuse resistor, comprising: a flame-retardant frame having interconnected flame-retardant chambers and multiple discharge channels, a sealed cover threaded onto the flame-retardant frame, a fixed frame rotatably mounted on the flame-retardant frame, a resistor frame mounted on the fixed frame, a resistor rod mounted on the flame-retardant frame, a flame-retardant component at each of the multiple discharge channels, and detachable resistor columns on the flame-retardant frame and the fixed frame; and a storage box mounted on the flame-retardant frame, the storage box having multiple partitioned chambers, and a pressurizing component mounted on the storage box.

[0007] Preferably, the flame-retardant component includes a retaining ring threaded onto the flame-retardant frame, and a limiting plate disposed between the retaining ring and the flame-retardant frame.

[0008] Preferably, the horizontal cross-section of the fixing ring mounting channel is a regular hexagon.

[0009] Preferably, the limiting plate is made of polyethylene.

[0010] Preferably, the pressurization assembly includes an insertion plate disposed on the storage box, a movable plate slidably disposed on the storage box, an elastic sleeve disposed between the insertion plate and the movable plate, and a spring disposed between the movable plate and the storage box.

[0011] Preferably, the fixing frame is provided with a limit post, and a handwheel is threadedly connected to the fixing frame.

[0012] Compared with the prior art, the present invention has the following beneficial technical effects:

[0013] When using this invention, the worker introduces the flame-retardant liquid into the flame-retardant chamber and then seals it with a cap. The pressurizing component is then connected to the flame-retardant chamber. After the resistor or circuit board burns, the flame will melt the flame-retardant component. Then, the flame-retardant liquid is sprayed onto the flame under the action of the pressurizing component, thereby extinguishing the flame and reducing the loss after the circuit board burns. Furthermore, after the resistor is damaged, the worker can directly replace the resistor column to reduce the cost of using the resistor. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the pressurization component and the storage box in an embodiment of this utility model;

[0016] Figure 3 This is a cross-sectional view of an embodiment of the present utility model;

[0017] Figure 4 This is a partial schematic diagram of an embodiment of the present utility model.

[0018] Reference numerals in the attached diagram: 1. Flame-retardant frame; 101. Flame-retardant chamber; 102. Discharge channel; 2. Fixing ring; 3. Limiting plate; 4. Sealing cover; 5. Storage box; 51. Dividing chamber; 6. Insertion plate; 7. Elastic sleeve; 8. Movable plate; 9. Spring; 10. Handwheel; 11. Limiting post; 12. Fixing frame; 13. Resistance rod; 14. Resistance frame; 15. Resistance post. Detailed Implementation

[0019] Example 1

[0020] like Figure 1-Figure 4As shown in the figure, this embodiment proposes a flame-retardant fuse resistor, including a flame-retardant frame 1 and a storage box 5. The flame-retardant frame 1 has interconnected flame-retardant cavities 101 and multiple discharge channels 102. A sealing cover 4 is threaded onto the flame-retardant frame 1. A fixing frame 12 is rotatably mounted on the flame-retardant frame 1. A resistor frame 14 is mounted on the fixing frame 12. A resistor rod 13 is mounted on the flame-retardant frame 1. A flame-retardant component is mounted at each of the multiple discharge channels 102. Resistor columns 15 are detachably mounted on the flame-retardant frame 1 and the fixing frame 12. The storage box 5 is mounted on the flame-retardant frame 1. The storage box 5 has multiple partitioned cavities 51. A pressurizing component is mounted on the storage box 5. The storage box 5 is made of a material with poor thermal conductivity, thereby preventing the gas inside the pressurizing component from expanding when heated and causing the pressurizing component to explode, thus improving the safety of the resistor.

[0021] In this embodiment, the worker introduces the flame-retardant liquid into the flame-retardant chamber 101 and then seals it with the sealing cap 4. The pressurizing component is then connected to the flame-retardant chamber 101. After the resistor or circuit board burns, the flame will melt the flame-retardant component. Then, the flame-retardant liquid is sprayed onto the flame under the action of the pressurizing component, thereby extinguishing the flame and reducing the loss after the circuit board burns. Furthermore, after the resistor is damaged, the worker can directly replace the resistor column 15 to reduce the cost of using the resistor.

[0022] Example 2

[0023] like Figure 1 , Figure 3 and Figure 4 As shown, this embodiment proposes a flame-retardant fuse resistor. Compared with the first embodiment, in this embodiment, the flame-retardant component includes a fixing ring 2 threadedly connected to the flame-retardant frame 1, and a limiting plate 3 disposed between the fixing ring 2 and the flame-retardant frame 1. The horizontal cross-section of the mounting channel of the fixing ring 2 is a regular hexagon, and the limiting plate 3 is made of polyethylene material.

[0024] In this embodiment, when the flame comes into contact with the limiting plate 3, the limiting plate 3 melts under high temperature, and the flame-retardant liquid flows out directly from the hole that appears when the limiting plate 3 melts. Then it is sprayed onto the flame to extinguish it. When the worker maintains the resistor, the worker inserts a hex wrench of the corresponding size into the installation channel, then rotates the fixing ring 2 to remove it, and then replaces the limiting plate 3, thereby reducing the cost of using the resistor.

[0025] Example 3

[0026] like Figure 1-Figure 3As shown, this embodiment proposes a flame-retardant fuse resistor. Compared to Embodiment 1, in this embodiment, the booster assembly includes an insertion plate 6 disposed on the storage box 5, a movable plate 8 slidably disposed on the storage box 5, an elastic sleeve 7 disposed between the insertion plate 6 and the movable plate 8, and a spring 9 disposed between the movable plate 8 and the storage box 5. A limit post 11 is provided on the fixing frame 12, and a handwheel 10 is threadedly connected to the fixing frame 12.

[0027] In this embodiment, the worker connects the insertion plate 6 to the flame-retardant cavity 101. Then, the insertion plate 6, the elastic sleeve 7, and the movable plate 8 are also filled with flame-retardant liquid. When the flame-retardant component is damaged, the spring 9 drives the movable plate 8 to move toward the insertion plate 6, the elastic sleeve 7 contracts, and the flame-retardant liquid of the pressurizing component is pushed into the flame-retardant cavity 101 by the movable plate 8, so that the flame-retardant liquid has a certain pressure when it is sprayed out to spray onto the ignition point of the flame, thereby improving the flame-retardant effect of the resistor.

[0028] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A flame-retardant fusible resistor, characterized in that, include: The flame-retardant frame (1) has interconnected flame-retardant chambers (101) and multiple discharge channels (102). A sealing cover (4) is threaded onto the flame-retardant frame (1). A fixed frame (12) is rotatably mounted on the flame-retardant frame (1). A resistor frame (14) is mounted on the fixed frame (12). A resistor rod (13) is mounted on the flame-retardant frame (1). A flame-retardant component is mounted at each of the multiple discharge channels (102). A resistor column (15) is detachably mounted on the flame-retardant frame (1) and the fixed frame (12). The storage box (5) is mounted on the flame-retardant rack (1). The storage box (5) has multiple partitioned cavities (51) and a pressurization assembly is mounted on the storage box (5).

2. The flame-retardant fuse resistor according to claim 1, characterized in that, The flame-retardant assembly includes a retaining ring (2) threaded onto the flame-retardant frame (1) and a limiting plate (3) disposed between the retaining ring (2) and the flame-retardant frame (1).

3. A flame-retardant fuse resistor according to claim 2, characterized in that, The horizontal cross-section of the mounting channel of the fixing ring (2) is a regular hexagon.

4. A flame-retardant fuse resistor according to claim 2, characterized in that, The limiting plate (3) is made of polyethylene material.

5. A flame-retardant fuse resistor according to claim 1, characterized in that, The pressurization assembly includes an insertion plate (6) disposed on the storage box (5), a movable plate (8) slidably disposed on the storage box (5), an elastic sleeve (7) disposed between the insertion plate (6) and the movable plate (8), and a spring (9) disposed between the movable plate (8) and the storage box (5).

6. A flame-retardant fuse resistor according to claim 1, characterized in that, A limit post (11) is provided on the fixed frame (12), and a handwheel (10) is threadedly connected to the fixed frame (12).

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