Electrical demonstration device

Abstract

The invention discloses an electrical demonstration device, which relates to the technical field of electrical equipment and comprises a cabinet body, a demonstration space is arranged in the cabinet body, a first cabinet door is arranged on one side of the demonstration space of the cabinet body, and a transparent observation window is arranged on the first cabinet door; a demonstration platform is arranged below the demonstration space, and a flash arc demonstration assembly is arranged on the demonstration platform; the flash arc demonstration assembly comprises two pole columns, a tungsten needle and a driving part, the two pole columns are arranged on the demonstration platform in a spaced mode in the horizontal direction, the tungsten needle is arranged on one side of the two pole columns, and the driving part is used for driving the tungsten needle to be close to or away from one pole column; according to the invention, high-intensity arc flash can be truly generated, the whole process from overload heating to burnout of a wire can be simulated, the phenomenon is visual, the impact force is strong, the teaching effect is obvious, employees can learn and understand electric power safety production knowledge more easily, and the knowledge receiving efficiency is high; according to the dual experiment mode, the demonstration function of two kinds of common electrical hazards of flashover and overload is integrated, and one machine has multiple purposes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of test maintenance boxes, in particular to an electrical demonstration device. BACKGROUND

[0002] Electric power safety production and operation of electric power equipment occupy a very important position in State Grid and other electric power companies or large power production enterprises. If not paying attention to power safety or electric power safety production, a slight carelessness will cause a major safety accident and cause casualties. Therefore, safety production and power consumption are the top priority of the electric power production industry and power consumption enterprises, and it is necessary to minimize the occurrence of electric power safety accidents. According to the investigation, most of the electric power safety accidents in China are caused by unsafe behavior of people or incorrect operation of operators. The main reason is that the quality of employees is uneven, and the electric power production enterprises lack effective management and necessary electric power safety training of employees.

[0003] Although some enterprises or electric power companies organize electric power safety production training for employees, the training content is often dull and lacks initiative. Employees are often passive in accepting the explanation of teachers or leaders, and the training is usually carried out through oral expression or video mode, which cannot directly bring intuitive feelings to the learners, and it is difficult for employees to learn and understand electric power safety production knowledge, and the efficiency of receiving knowledge is very low.

[0004] Therefore, an electrical demonstration device is urgently needed. SUMMARY

[0005] In view of the problems in the prior art, the present application solves the problem by using the following technical structure.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: An electrical demonstration device, comprising: a cabinet body, a demonstration space is arranged in the cabinet body, a first cabinet door is arranged on one side of the demonstration space, and a transparent observation window is arranged on the first cabinet door; A demonstration platform is arranged below the demonstration space, and an arc flash demonstration assembly is arranged on the demonstration platform; the arc flash demonstration assembly comprises two pole columns, a tungsten needle and a driving member, the two pole columns are arranged horizontally and spaced apart on the demonstration platform, the tungsten needle is arranged on one side of the two pole columns, and the driving member is used to drive the tungsten needle to approach or move away from one of the pole columns. The two pole columns are connected with the positive and negative poles of a power supply respectively.

[0007] The driving member comprises a linear motor and a clamping tool, the linear motor is arranged on the demonstration platform, the clamping tool is arranged on the driving end of the linear motor, and the tungsten needle is arranged on the clamping tool.

[0008] The tungsten needle is horizontally arranged on the clamping tool, and the linear motor is used for driving the tungsten needle to move axially, wherein one of the pole columns is arranged on the movement path of the tungsten needle.

[0009] The distance between the two pole columns gradually increases from bottom to top.

[0010] The pole column is made of copper.

[0011] The demonstration platform is further provided with an overload demonstration assembly, the overload demonstration assembly comprises a wire and two load conductive terminals, the two load conductive terminals are arranged on the demonstration platform at intervals, and two ends of the wire are connected with the two load conductive terminals respectively. The two load conductive terminals are connected with the positive and negative poles of a power supply respectively.

[0012] The two ends of the wire are connected with the two load conductive terminals through quick release structures respectively.

[0013] The cabinet is provided with a mounting space below the demonstration platform, the cabinet is provided with a second cabinet door on one side of the mounting space, and a plurality of operation switches and a plurality of prompt lights are arranged on the second cabinet door.

[0014] The first cabinet door is provided with an electromagnetic lock.

[0015] The cabinet is provided with a smoke exhaust port at the top of the demonstration space, and a smoke exhaust fan is arranged at the air outlet.

[0016] The above structure of the present application can achieve the following beneficial effects: The present application has high simulation: can really produce high-strength arc flash, simulate the whole process of wire overload heating to burnout, the phenomenon is intuitive, the impact is strong, the teaching effect is remarkable, it is easier for employees to learn and understand the knowledge of electric power safety production, the efficiency of receiving knowledge is higher; double experimental mode: the demonstration functions of two common electrical hazards, arc flash and overload, are integrated in one machine. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the structure of the arc flash demonstration assembly in the present application; Figure 3 It is a schematic diagram of the structure of the second cabinet door in the present application.

[0018] In the figure: 1, demonstration platform; 2, pole column; 3, tungsten needle; 4, linear motor; 5, clamping tool; 6, wire; 7, load conductive terminal; 8, first cabinet door; 9, second cabinet door; 10, smoke exhaust port. DETAILED DESCRIPTION

[0019] In order to make the person skilled in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.

[0020] It should be noted that the terms “include” and “have” and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover the non-exclusive inclusion, for example, a process, method, region, product or device including a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0021] The following will be described in combination with Figure 1 and Figure 2 to further illustrate the present application.

[0022] As Figure 1 shown, an electrical demonstration device comprises a cabinet body, a demonstration space is arranged in the cabinet body, a first cabinet door 8 is arranged on one side of the demonstration space, and a transparent observation window 9 is arranged on the first cabinet door 8; A demonstration platform is arranged below the demonstration space, and a flashover demonstration assembly is arranged on the demonstration platform 1; the flashover demonstration assembly comprises two pole columns 2, a tungsten needle 3 and a driving member, the two pole columns 2 are arranged horizontally and spaced apart on the demonstration platform, the tungsten needle 3 is arranged on one side of the two pole columns 2, and the driving member is used to drive the tungsten needle 3 to approach or move away from one of the pole columns 2. The two pole columns 2 are connected with the positive and negative poles of a power supply respectively.

[0023] Based on the above structure, during demonstration, the first cabinet door 8 is closed, the driving member drives the tungsten needle 3 to hit the pole column 2, arc light is generated, the electric arc rises to the top of the copper column, and thus the flashover (short circuit) demonstration is completed, which brings an intuitive feeling to the training personnel, leaves a deeper impact, has a better learning effect, makes the employees easier to learn and understand the knowledge of safe production of electric power, and has a higher efficiency of receiving knowledge.

[0024] As Figure 1 and Figure 2As shown, the driving member includes a linear motor 4 (or an electric cylinder or a pneumatic cylinder, etc.) and a clamping tool 5, the linear motor 4 is arranged on the demonstration platform 1, the clamping tool 5 is arranged at the driving end of the linear motor 4, the tungsten needle 3 is arranged on the clamping tool 5, and the tungsten needle 3 is horizontally arranged on the clamping tool 5, and the linear motor 4 is used to drive the tungsten needle 3 to move axially, one of the pole columns 2 is arranged on the movement path of the tungsten needle 3, the tungsten needle 3 is driven to move by the linear motor 4, so as to achieve the purpose of the tungsten needle 3 impacting one of the pole columns 2, and the flashover demonstration is realized.

[0025] Further optimization is that the distance between the two pole columns 2 gradually increases from bottom to top, and the pole columns 2 are made of copper to present a better demonstration effect.

[0026] As shown in Figure 1 , the demonstration platform 1 is also provided with an overload demonstration assembly, the overload demonstration assembly includes a wire 6 and two load conductive terminals 7, the two load conductive terminals 7 are arranged at intervals on the demonstration platform 1, and the two ends of the wire 6 are connected with the two load conductive terminals 7 respectively; the two load conductive terminals 7 are connected with the positive and negative poles of the power supply respectively, the load adjusting potentiometer is slowly rotated clockwise, the current passes through the wire 6, and the rotation can be stopped when the ammeter display is about 15A; the circuit breaker trips after about 10-30 seconds (or after observing for about several seconds, the wire starts to smoke, and the insulating layer starts to melt), so as to complete the overload demonstration.

[0027] And due to the demonstration requirement, the wire 6 needs to be replaced, so that the two ends of the wire 6 are connected with the two load conductive terminals 7 through quick release structures respectively, so as to achieve the purpose of quick replacement.

[0028] As shown in Figure 1 and Figure 3 , the cabinet body is provided with a mounting space below the demonstration platform, the cabinet body is provided with a second cabinet door 9 on one side of the mounting space, and the second cabinet door 9 is provided with a plurality of operation switches and a plurality of indicator lights (such as an isolation switch, a power switch, a power indicator light, a total leakage protection circuit breaker, a first selection switch (selecting short circuit experiment or load experiment), a second selection switch (selecting protection or no protection), a flashover starting switch, an overload circuit breaker, and a load adjusting potentiometer, etc.).

[0029] Further optimization is that the first cabinet door 8 is provided with an electromagnetic lock, and the electromagnetic lock and the device power supply system realize safe interlocking control: only when the device main disconnecting switch is in the "OFF" (off) position, the electromagnetic lock is powered off and released, allowing the cabinet door to be opened for maintenance or setting. When the door is closed, when the operator closes the main disconnecting switch, the device control circuit is powered on, and the electromagnetic lock is powered on at the same time. The front cabinet door is firmly locked and cannot be opened. This prevents accidental opening of the cabinet door to contact the live parts when the device is running; when the door is open, maintenance or replacement of internal components is required. First, the main disconnecting switch must be rotated to the "OFF" position. This action cuts off all power supplies to the device, including the power supply to the electromagnetic lock, and the lock is released instantly. At this time, the cabinet door can be opened using a key or manually; this design meets the safety specifications of "lock and sign", realizes double isolation of mechanical and electrical, and is an important guarantee for preventing arc flash injury and operator misoperation. It forcibly binds the access permission of the high-risk area with the power state, ensuring the safety of the operator.

[0030] As shown in Figure 1 The cabinet body is provided with a smoke exhaust port 10 at the top of the demonstration space, and a smoke exhaust fan is arranged at the air outlet to exhaust the smoke generated in the demonstration space and ensure the cleanliness of the demonstration space.

[0031] In summary, the present application has high simulation: it can truly generate high-intensity arc flash, simulate the whole process of wire overload heating to burnout, the phenomenon is intuitive, the impact is strong, and the teaching effect is remarkable; double experimental mode: integrated demonstration functions of arc flash (ArcFlash) and overload (Overload) two common electrical hazards, one machine with multiple functions; Short circuit test (arc flash test) without protection demonstration steps: disconnecting switch - closing, at this time the indicator light is on, the electromagnetic lock is actuated (at this time the cabinet door cannot be opened); main leakage protection circuit breaker closing, at this time the current meter displays; the first selection switch is rotated to the short circuit test position; the second selection switch is rotated to the unprotected position, at this time the transformer power supply in the cabinet is turned on (the arc flash test is performed 10 seconds after power on); the flash start button is quickly jogged to make the drive member drive the tungsten needle 3 to hit the pole 2, and the arc light is generated. The arc rises to the top of the copper column. All selection switches are rotated to the 0 position (middle position); the leakage protection circuit breaker is opened; the disconnecting switch is opened, and the test is completed.

[0032] Short-circuit test with protection demonstration test steps: disconnecting switch - closing, at this time the indicator light is on, the electromagnetic lock is in action (at this time the cabinet door cannot be opened); the total leakage protection circuit breaker is closed, at this time the multifunction table displays; the first selection switch is rotated to the arc test position; the second selection switch is rotated to the protected position, at this time the transformer power in the cabinet is turned on (the arc test is performed five seconds after the power is turned on); the fast jog arc start button is pressed, the driving member drives the tungsten needle 3 to hit the pole 2, the arc light is generated, and the arc light is extinguished after 0.3-0.5 seconds; all selection switches are rotated to the 0 position (the middle position); the leakage protection circuit breaker is opened; the disconnecting switch is opened, and the test is completed.

[0033] Overload test with protection demonstration steps: confirm that the disconnecting switch is in the open position, at this time the first cabinet door 8 can be opened, and the copper pole 2 is checked for electricity; after the two ends of the two load conductive terminals 7 are installed with test wires 6 (it is recommended to use 0.5-1mm square wires), the disconnecting switch is closed, at this time the indicator light is on, and the electromagnetic lock is in action (at this time the cabinet door cannot be opened); the total leakage protection circuit breaker is closed, at this time the multifunction table displays; the first selection switch is rotated to the overload test position; the second selection switch is rotated to the protected position; the overload circuit breaker is closed; the load adjusting potentiometer is slowly rotated clockwise, and the current table is observed to stop rotating when the current is about 15A; after about 10-30 seconds, the circuit breaker trips. The protection function is presented; the load adjusting potentiometer is returned to zero; all selection switches are rotated to the 0 position (the middle position); the leakage protection circuit breaker is opened; the disconnecting switch is opened, and the test is completed.

[0034] Overload test without protection (burning wires) demonstration steps: confirm that the disconnecting switch is in the open position, at this time the cabinet door can be opened, and the copper pole 2 is checked for electricity; after the two ends of the overload test pole are installed with test wires (it is recommended to use 0.5-1mm square wires), the disconnecting switch is closed, at this time the indicator light is on, and the electromagnetic lock is in action (at this time the cabinet door cannot be opened); the total leakage protection circuit breaker is closed, at this time the multifunction table displays; the first selection switch is rotated to the overload test position; the second selection switch is rotated to the unprotected position; the load adjusting potentiometer is slowly rotated clockwise, and the current table is observed to stop rotating when the current is about 30A (1 square wire test, if smaller specification test wires are used, the current can be appropriately reduced); after about several seconds, the wires start to smoke, and the insulation layer starts to melt. The load adjusting potentiometer is returned to zero; all selection switches are rotated to the 0 position (the middle position); the leakage protection circuit breaker is opened; the disconnecting switch is opened, and the test is completed.

[0035] The above is only a preferred embodiment of the present application, and the present application is not limited to the above embodiments. It can be understood that other improvements and changes directly derived or thought of by those skilled in the art without departing from the spirit and concept of the present application should be considered to be within the scope of protection of the present application.

Claims

1. An electrical demonstration device, characterized in that, include: The cabinet has a demonstration space inside, and a first cabinet door (8) is provided on one side of the demonstration space. A transparent observation window (9) is provided on the first cabinet door (8). Below the demonstration space is a demonstration platform, on which a flash arc demonstration component is provided; the flash arc demonstration component includes two poles (2), a tungsten needle (3) and a driving component. The two poles (2) are horizontally spaced on the demonstration platform, and the tungsten needle (3) is located on one side of the two poles (2). The driving component is used to drive the tungsten needle (3) to move closer to or away from one of the poles (2). The two terminals (2) are connected to the positive and negative terminals of the power supply, respectively.

2. The electrical demonstration device according to claim 1, characterized in that: The driving component includes a linear motor (4) and a clamping fixture (5). The linear motor (4) is mounted on the demonstration platform (1), the clamping fixture (5) is mounted on the driving end of the linear motor (4), and the tungsten needle (3) is mounted on the clamping fixture (5).

3. An electrical demonstration device according to claim 2, characterized in that: The tungsten needle (3) is horizontally positioned on the clamping fixture (5), and the linear motor (4) is used to drive the tungsten needle (3) to move axially. One of the pole posts (2) is positioned on the movement path of the tungsten needle (3).

4. An electrical demonstration device according to claim 1, characterized in that: The distance between the two poles (2) gradually increases from bottom to top.

5. An electrical demonstration device according to claim 4, characterized in that: The pole (2) is made of copper.

6. An electrical demonstration device according to claim 1, characterized in that: The demonstration platform (1) is also provided with an overload demonstration component. The overload demonstration component includes a wire (6) and two load conductive terminals (7). The two load conductive terminals (7) are spaced apart on the demonstration platform (1). The two ends of the wire (6) are respectively connected to the two load conductive terminals (7). The two load conductive terminals (7) are respectively connected to the positive and negative terminals of the power supply.

7. An electrical demonstration device according to claim 6, characterized in that: The two ends of the wire (6) are connected to two load conductive terminals (7) respectively through a quick-release structure.

8. An electrical demonstration device according to any one of claims 1-7, characterized in that: The cabinet has an installation space below the demonstration platform, and a second cabinet door (9) is provided on one side of the installation space. The second cabinet door (9) is equipped with several operation switches and several indicator lights.

9. An electrical demonstration device according to any one of claims 1-7, characterized in that: An electromagnetic lock is installed on the first cabinet door (8).

10. An electrical demonstration device according to claim 1, characterized in that: The cabinet has a smoke vent (10) at the top of the demonstration space, and a smoke exhaust fan is installed at the air outlet.

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