An electrically conductive wire electric fire simulation experiment device

Abstract

The application discloses a kind of live wire electric fire simulation experiment device, including power supply, sliding rheostat, mounting bracket, experimental live wire and sensor;Power supply, sliding rheostat, experimental live wire are sequentially connected in series;Mounting bracket includes balance, the top of balance is fixed with two mounting seats, two mounting seats are slidably sleeved with stand, two stands are fixed with wire fixing mechanism, experimental live wire is detachably installed on stand by wire fixing mechanism;One stand is fixedly installed with insulation layer cutting mechanism, another stand is fixedly installed with wire changing mechanism, two wire fixing mechanisms are arranged between insulation layer cutting mechanism and wire changing mechanism. When using the application to carry out live wire fire simulation experiment, it is not necessary to manually replace the experimental live wire, and the operation is simple, which helps to improve the experimental efficiency.

Description

Technical Field

[0001] This invention relates to the field of electrical fault simulation technology, and in particular to an experimental device for simulating electrical fires in energized wires. Background Technology

[0002] Electrical fires are among the most common types of fire accidents, accounting for about one-third of all fires in my country. The investigation results of such fires are also a focus of public attention, directly affecting the vital interests of the affected people. Electrical fires are divided into two main categories: one is caused by faults in electrical circuits such as short circuits, overcurrent, leakage, and poor contact, which ignite surrounding combustibles; the other is caused by electrical equipment failure due to some reason, resulting in localized high temperatures or circuit faults. According to the fire classification and statistical standards, there is a strict distinction between the two, but in essence, they are both energy conversions between voltage, current, resistance, and combustibles.

[0003] In existing technologies, when conducting simulation experiments on fires involving live wires, the live wires used in the experiment can only be replaced after one is used up. This operation is cumbersome and seriously affects the efficiency of the experiment. Therefore, there is an urgent need to provide a live wire electrical fire simulation experiment device that can automatically install live wires for the experiment. Summary of the Invention

[0004] The purpose of this invention is to provide an electrical fire simulation experimental device for energized wires, so as to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides an electrical fire simulation experimental device for energized wires, comprising a power supply, a sliding rheostat, a mounting bracket, energized wires for experiments, and a sensor; the sensor is used to collect experimental data during the experiment, and the power supply, the sliding rheostat, and the energized wires for experiments are connected in series.

[0006] The mounting frame includes a balance for measuring the mass change of the experimental current-carrying wire during the experiment. Two mounting bases are fixedly connected to the top of the balance. A column is slidably fitted inside each mounting base, and a wire fixing mechanism is fixedly installed on each column. The experimental current-carrying wire is detachably mounted on the column via the wire fixing mechanism. An insulation cutting mechanism is fixedly installed on one column, used to cut off the bottom connection point of the experimental current-carrying wire. The power supply is electrically connected to two adjacent connection points of the experimental current-carrying wire via the two wire fixing mechanisms. A wire-changing mechanism is fixedly installed on the other column, used to replace the experimental current-carrying wire connected in series with the power supply. Both wire fixing mechanisms are located between the insulation cutting mechanism and the wire-changing mechanism.

[0007] Preferably, the wire fixing mechanism includes a support block fixedly connected to the column, two guide posts fixedly connected to the top of the support block, a pressure block slidably sleeved on the guide posts, an opening at the bottom of the pressure block for the experimental energized wire to pass through, a spring sleeved on the guide posts, the spring being located above the pressure block, and the two ends of the spring being fixedly connected to the top of the guide posts and the top of the pressure block, respectively; a power connection component is fixedly connected to the top of the support block, and the experimental energized wire is electrically connected to the power source through the power connection component.

[0008] Preferably, the power connection assembly includes a metal rod fixedly connected to the top of the support block, the central axis of the metal rod being perpendicular to the direction of the opening, a groove being provided at the bottom end of the pressure block, and the metal rod being adapted to the groove; a metal sheet is fixedly connected to the inner wall of the opening at the bottom end of the pressure block, and both ends of the metal sheet are in contact with the metal rod.

[0009] Preferably, the column has a plurality of threaded holes at equal intervals along the vertical direction, and bolts are threaded into the threaded holes. The support block is fixedly installed on the column by the bolts.

[0010] Preferably, the insulation layer removal mechanism includes a mounting block fixedly connected to the column, a fixing block fixedly connected to the top of the mounting block, the fixing block having an inverted U-shaped structure, a horizontal through hole on the fixing block, a first telescopic rod fixedly connected to the top of the mounting block, a scraper fixedly connected to the top of the first telescopic rod, and the scraper extending into the horizontal through hole.

[0011] Preferably, the wire-changing mechanism includes a second telescopic rod fixedly connected to the column, a U-shaped connecting plate fixedly connected to the end of the second telescopic rod, a lead screw rotatably connected between the two ends of the U-shaped connecting plate, the two ends of the lead screw being respectively provided with forward and reverse threads, a motor fixedly connected to the U-shaped connecting plate, the output shaft of the motor being fixedly connected to one end of the lead screw, clamping plates threaded to both ends of the lead screw, the bottom end of the clamping plate being slidably connected to the U-shaped connecting plate, a sliding rod provided above the lead screw, the two ends of the sliding rod being respectively fixedly connected to the two ends of the U-shaped connecting plate, and the clamping plate being slidably sleeved on the sliding rod; the experimental energized wire is disposed between the two clamping plates, and the experimental energized wire is disposed between the lead screw and the sliding rod.

[0012] Preferably, anti-slip pads are fixedly installed on the opposite sides of both clamps.

[0013] Preferably, the experimental data includes temperature, dust particles, and the insulation state of the experimental conductive wire.

[0014] Compared with the prior art, the present invention has the following advantages and technical effects:

[0015] The electrical fire simulation experimental device for energized wires provided by this invention can remove the insulation layer of the experimental energized wires to form circuit connection points through the insulation layer removal mechanism; it can automatically replace the experimental energized wires through the wire replacement mechanism; and it can fix the experimental energized wires and connect them to the power source through the wire fixing mechanism. When using this invention to conduct electrical fire simulation experiments with energized wires, there is no need to manually replace the experimental energized wires, making the operation simple and helping to improve experimental efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the electrical fire simulation experimental device for energized wires of the present invention;

[0018] Figure 2 for Figure 1 A magnified view of part A in the image;

[0019] Figure 3 for Figure 1 A magnified view of part B in the image;

[0020] Figure 4 This is a schematic diagram of the electrical fire simulation experimental device for energized wires of the present invention from another perspective;

[0021] Figure 5 for Figure 4 A magnified view of part C;

[0022] Figure 6 This is a schematic diagram illustrating the cooperation between the metal rod and the metal sheet of the present invention;

[0023] The components are as follows: 1. Power supply; 2. Sliding rheostat; 3. Experimental power-carrying wire; 4. Balance; 5. Mounting base; 6. Column; 7. Support block; 8. Guide column; 9. Pressure block; 10. Spring; 11. Metal rod; 12. Metal sheet; 13. Threaded hole; 14. Mounting block; 15. Fixing block; 16. First telescopic rod; 17. Scraper; 18. Second telescopic rod; 19. U-shaped connecting plate; 20. Lead screw; 21. Motor; 22. Clamping plate; 23. Slide rod. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other. The described embodiments are merely some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention. The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] This invention provides an electrical fire simulation experimental device for energized wires, including a power supply 1, a sliding rheostat 2, a mounting bracket, an experimental energized wire 3, and a sensor; the sensor is used to collect experimental data during the experiment, and the power supply 1, the sliding rheostat 2, and the experimental energized wire 3 are connected in series.

[0026] The mounting frame includes a balance 4, which is used to measure the mass change of the experimental current-carrying wire 3 during the experiment. Two mounting bases 5 are fixedly connected to the top of the balance 4. Each mounting base 5 has a slidably fitted column 6, and each column 6 has a wire fixing mechanism fixedly installed on it. The experimental current-carrying wire 3 is detachably mounted on the column 6 through the wire fixing mechanism. An insulation cutting mechanism is fixedly installed on one column 6, used to cut off the bottom connection point of the experimental current-carrying wire 3. The power supply 1 is electrically connected to two adjacent connection points of the experimental current-carrying wire 3 through the two wire fixing mechanisms. A wire-changing mechanism is fixedly installed on the other column 6, used to replace the experimental current-carrying wire 3 connected in series with the power supply 1. Both wire fixing mechanisms are located between the insulation cutting mechanism and the wire-changing mechanism.

[0027] Furthermore, to facilitate the fixing of the experimental energized wire 3 and ensure circuit continuity, the wire fixing mechanism includes a support block 7 fixedly connected to the column 6. Two guide posts 8 are fixedly connected to the top of the support block 7. A pressure block 9 is slidably sleeved on the guide post 8. An opening for the experimental energized wire 3 to pass through is opened at the bottom of the pressure block 9. A spring 10 is sleeved on the guide post 8. The spring 10 is located above the pressure block 9. The two ends of the spring 10 are fixedly connected to the top of the guide post 8 and the top of the pressure block 9, respectively. A power connection component is fixedly connected to the top of the support block 7. The experimental energized wire 3 is electrically connected to the power supply 1 through the power connection component.

[0028] Furthermore, to avoid the possibility of circuit disconnection, the power connection component includes a metal rod 11 fixedly connected to the top of the support block 7. The central axis of the metal rod 11 is perpendicular to the direction of the opening. A groove is provided at the bottom of the pressure block 9, and the metal rod 11 is adapted to the groove. A metal sheet 12 is fixedly connected to the inner wall of the opening at the bottom of the pressure block 9, and both ends of the metal sheet 12 are in contact with the metal rod 11.

[0029] Furthermore, to facilitate the adjustment of the installation position of the support block 7 and change the tilt state of the experimental power-carrying wire 3, several threaded holes 13 are equally spaced along the vertical direction on the column 6. Bolts are connected to the internal threads of the threaded holes 13, and the support block 7 is fixedly installed on the column 6 by bolts.

[0030] Furthermore, to ensure that the circuit remains connected when the experimental energized wire 3 is used continuously, the insulation removal mechanism includes a mounting block 14 fixedly connected to the column 6. A fixing block 15 is fixedly connected to the top of the mounting block 14. The fixing block 15 has an inverted U-shaped structure and a horizontal through hole. A first telescopic rod 16 is fixedly connected to the top of the mounting block 14. A scraper 17 is fixedly connected to the top of the first telescopic rod 16 and extends into the horizontal through hole.

[0031] Furthermore, to achieve automatic replacement of the experimental energized wire 3, the wire-changing mechanism includes a second telescopic rod 18 fixedly connected to the column 6. A U-shaped connecting plate 19 is fixedly connected to the end of the second telescopic rod 18. A lead screw 20 is rotatably connected between the two ends of the U-shaped connecting plate 19. The two ends of the lead screw 20 are respectively provided with positive and negative threads. A motor 21 is fixedly connected to the U-shaped connecting plate 19. The output shaft of the motor 21 is fixedly connected to one end of the lead screw 20. Both ends of the lead screw 20 are threadedly connected to clamping plates 22. The bottom end of the clamping plate 22 is slidably connected to the U-shaped connecting plate 19. A sliding rod 23 is provided above the lead screw 20. The two ends of the sliding rod 23 are respectively fixedly connected to the two ends of the U-shaped connecting plate 19. The clamping plate 22 is slidably sleeved on the sliding rod 23. The experimental energized wire 3 is set between the two clamping plates 22 and between the lead screw 20 and the sliding rod 23.

[0032] Furthermore, to prevent slippage between the experimental power-conducting wire 3 and the clamp 22 during the replacement of the experimental power-conducting wire 3, which could lead to a disconnection of the circuit, anti-slip pads are fixedly installed on opposite sides of both clamps 22.

[0033] Furthermore, the experimental data included temperature, dust particles, and the insulation state of the experimental conductive wire 3.

[0034] The electrical fire simulation experimental device for energized wires provided by this invention operates on the following principle: The energized wire 3 used in the experiment is a relatively long single wire. During the first experiment, the insulation layer at the connection point of the energized wire 3 is manually removed. Then, the energized wire 3 is installed onto the column 6 in sequence through the insulation layer removal mechanism, two wire fixing mechanisms, and the wire changing mechanism. The energized wire 3 is then connected to the power supply 1 and the sliding rheostat 2, and the experiment can then be carried out. During the experiment, the experimental data is collected using sensors.

[0035] When the insulation layer of a section of experimental conductive wire 3 used in the current experiment melts and becomes unusable, the motor 21 drives the two clamping plates 22 to move relative to each other, clamping the conductive wire 3. Then, the second telescopic rod 18 is extended, pulling the conductive wire 3 to move. During the movement, the time interval between the raising and lowering of the first telescopic rod 16 is controlled, allowing the scraper 17 to scrape out two circuit connection points on the conductive wire 3. When the second telescopic rod 18 reaches its maximum length, the two new connection points on the conductive wire 3 correspond to the two wire fixing mechanisms, forming a circuit connection. When the conductive wire 3 moves, the pressure block 9 can be slightly raised to allow the conductive wire 3 to pass through normally. After the second telescopic rod 18 stops extending, the metal rod 11 on the support block 7 and the metal plate 12 on the pressure block 9 ensure the connection with the connection points of the conductive wire 3, guaranteeing circuit continuity. A take-up device can be installed on one side of the wire-changing mechanism to facilitate the take-up of the experimental energized wire 3 after the experiment.

[0036] The electrical fire simulation experiment device for energized wires provided by this invention eliminates the need for manual replacement of the energized wires 3 during the simulation experiment, simplifying operation and improving experimental efficiency.

[0037] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A device for simulating electrical fires involving energized wires, characterized in that, It includes a power supply (1), a sliding rheostat (2), a mounting bracket, experimental energized wires (3), and a sensor; the sensor is used to collect experimental data during the experiment, and the power supply (1), the sliding rheostat (2), and the experimental energized wires (3) are connected in series. The mounting frame includes a balance (4), which is used to measure the mass change of the experimental current-carrying wire (3) during the experiment; two mounting bases (5) are fixedly connected to the top of the balance (4), and columns (6) are slidably fitted inside the two mounting bases (5). A wire fixing mechanism is fixedly installed on the two columns (6), and the experimental current-carrying wire (3) is detachably installed on the column (6) through the wire fixing mechanism; an insulation layer cutting mechanism is fixedly installed on one column (6), which is used to cut off the bottom connection point of the experimental current-carrying wire (3), and the power supply (1) is electrically connected to the two adjacent connection points of the experimental current-carrying wire (3) through the two wire fixing mechanisms respectively; a wire changing mechanism is fixedly installed on the other column (6), which is used to replace the experimental current-carrying wire (3) connected in series with the power supply (1); both wire fixing mechanisms are located between the insulation layer cutting mechanism and the wire changing mechanism. The wire fixing mechanism includes a support block (7) fixedly connected to the column (6), two guide posts (8) fixedly connected to the top of the support block (7), a pressure block (9) slidably sleeved on the guide post (8), an opening for the experimental energized wire (3) to pass through the bottom of the pressure block (9), a spring (10) sleeved on the guide post (8), the spring (10) being located above the pressure block (9), and the two ends of the spring (10) being fixedly connected to the top of the guide post (8) and the top of the pressure block (9) respectively; a power connection component is fixedly connected to the top of the support block (7), and the experimental energized wire (3) is electrically connected to the power source (1) through the power connection component; The power connection assembly includes a metal rod (11) fixedly connected to the top of the support block (7). The central axis of the metal rod (11) is perpendicular to the direction of the opening. The bottom end of the pressure block (9) is provided with a groove, and the metal rod (11) is adapted to the groove. A metal sheet (12) is fixedly connected to the inner wall of the opening at the bottom end of the pressure block (9). Both ends of the metal sheet (12) are in contact with the metal rod (11).

2. The electrical fire simulation experimental device for energized wires according to claim 1, characterized in that, The column (6) has several threaded holes (13) at equal intervals along the vertical direction. Bolts are threaded into the threaded holes (13), and the support block (7) is fixedly installed on the column (6) by the bolts.

3. The electrical fire simulation experimental device for energized wires according to claim 1, characterized in that, The insulation layer removal mechanism includes a mounting block (14) fixedly connected to the column (6). A fixing block (15) is fixedly connected to the top of the mounting block (14). The fixing block (15) has an inverted U-shaped structure and a horizontal through hole. A first telescopic rod (16) is fixedly connected to the top of the mounting block (14). A scraper (17) is fixedly connected to the top of the first telescopic rod (16). The scraper (17) extends into the horizontal through hole.

4. The electrical fire simulation experimental device for energized wires according to claim 1, characterized in that, The switching mechanism includes a second telescopic rod (18) fixedly connected to the column (6). A U-shaped connecting plate (19) is fixedly connected to the end of the second telescopic rod (18). A lead screw (20) is rotatably connected between the two ends of the U-shaped connecting plate (19). The two ends of the lead screw (20) are respectively provided with positive and negative threads. A motor (21) is fixedly connected to the U-shaped connecting plate (19). The output shaft of the motor (21) is fixedly connected to one end of the lead screw (20). Both ends of the lead screw (20) are threaded. A clamping plate (22) is connected, and the bottom end of the clamping plate (22) is slidably connected to the U-shaped connecting plate (19). A sliding rod (23) is provided above the lead screw (20), and the two ends of the sliding rod (23) are respectively fixedly connected to the two ends of the U-shaped connecting plate (19). The clamping plate (22) is slidably sleeved on the sliding rod (23). The experimental power-carrying wire (3) is set between the two clamping plates (22) and between the lead screw (20) and the sliding rod (23).

5. The electrical fire simulation experimental device for energized wires according to claim 4, characterized in that, Anti-slip pads are fixedly installed on the opposite sides of both clamps (22).

6. The electrical fire simulation experimental device for energized wires according to claim 1, characterized in that, The experimental data include temperature, dust particles, and the insulation state of the experimental conductor (3).

Images