CN205281733U - Protection against electric shock block terminal - Google Patents

Abstract

The utility model discloses an electric shock-proof distribution box, which comprises an open box body composed of a top plate, a bottom plate, a left side plate, a right side plate and a rear side plate. The front opening of the open box body is composed of a front side frame and a The front door is closed. The door includes a left door and a right door that can be opened and closed. The distribution box is connected to the protection device. Sensors and current sensors are installed in the distribution box. The filter is sequentially connected with the first amplifier and the relay, and the filter is connected with the second amplifier and the alarm device in turn, and the relay is also connected with a power supply.

Description

Electric shock distribution box

technical field

The utility model relates to an electric shock-proof distribution box.

Background technique

The electrical control system is a system that is composed of a motor and a number of electrical components connected according to certain requirements in order to complete specific functions of production process control. In order to express the composition and working principle of the production machinery and electrical control system, and to facilitate the installation, commissioning and maintenance of the equipment, the electrical components and connection relationships in the system are reflected in certain drawings, and the drawings are represented by prescribed graphic symbols Each electrical component, and each electrical component is explained with text symbols. The electrical schematic diagram has a simple structure and clear layers. It is suitable for researching and analyzing the working principle of the circuit, and can provide help for finding faults. It is also the basis for compiling electrical installation wiring diagrams. Therefore, in The design department and production site are widely used, and the power distribution cabinet often becomes a very important carrier, which can meet the requirements of each electrical component in the circuit design and be reliably fixed in a certain position in the cabinet, which is convenient for the operator to operate and view. However, in the existing production, it is inevitable that there will be equipment failures or changes in production requirements. Sometimes it is necessary for operators to perform maintenance operations when the power distribution equipment is in a live state. A considerable degree of danger has emerged.

Contents of the invention

In view of the above problems, the utility model provides an electric shock-proof distribution box.

In order to achieve the above purpose, the technical solution adopted by the utility model is: an electric shock-proof distribution box, including an open box body composed of a top plate, a bottom plate, a left side plate, a right side plate, and a rear side plate. The side opening is closed by the front side frame and the front door. The door includes a left door and a right door that can be opened and closed. The distribution box is connected with the protection device. A filter. On the one hand, the filter is sequentially connected to the first amplifier and the relay; on the other hand, the filter is sequentially connected to the second amplifier and the alarm device. The relay is also connected to a power supply.

Furthermore, a lightning protection power supply circuit is also provided in the box, and the lightning protection power supply circuit includes: a lightning protection circuit, an indicating device and an output unit, wherein the input end of the lightning protection circuit is connected to a power supply, and the The output terminal of the lightning protection circuit is connected with the output unit, which is used to eliminate the lightning surge voltage entering from the power supply system;

The lightning protection circuit includes a first-stage discharge unit, a second-stage current-blocking unit, and a third-stage clamping unit that are sequentially connected;

The indicating device is connected with the lightning protection circuit, and is used to display the current and voltage of each phase in the lightning protection circuit;

The output terminal of the output unit is connected with the equipment to be protected, and is used for supplying power to the equipment to be protected.

Further, the left side panel and the right side panel are provided with louvers, the openings of the louvers are downward, and gauze is arranged inside the louvers.

Furthermore, a lighting device is provided inside the box, and the lighting device includes at least one lamp body and a push-type switch, and the lamp body is connected to the push-type switch.

Further, the underside of the box is provided with through holes and insulating pads for threading, and it is characterized in that a ground wire is added to the bottom of the box, and the ground wire is connected to the bottom of the box for Lead the static electricity on the distribution box to the ground for discharge in time.

Further, a one-way diode is added on the grounding wire, and the anode end of the one-way diode is connected to the box body of the distribution box.

Further, the back side of the front door is provided with a vertical interlayer parallel to the front door, and the interlayer and the front door form an up-down interlayer passage, the upper port of the interlayer passage is provided with a fan, and the air outlet of the fan is connected to the upper port of the interlayer passage. in series.

Further, the front door is sequentially composed of an inner layer, a middle layer and an outer layer from the inside to the outside, the inner layer is respectively provided with a radiation-proof layer and a sealing layer from the inside to the outside, and the middle layer is composed of an electric leakage layer and a fireproof layer The double-layer structure, the outer layer is a high-strength insulating armor layer, and the outside of the front door is also provided with an insulating anti-vibration mount.

Further, an intelligent indicating device is provided on the box, and the intelligent indicating device includes:

Switches, indicating devices and alarm devices, wherein,

said switch for activating or deactivating said indicating device;

The indicating device is connected to the switch, and is used to indicate that the electric equipment is in a charged state after the indicating device is activated;

The alarm device, connected to the switch, includes: a thermal sensor, an alarm distance adjustment device and an alarm, wherein,

The alarm distance adjustment device is used to set the alarm distance;

The thermal sensor is used to detect the distance between the heat source and the electrical equipment;

The alarm is connected between the thermal sensor and the alarm distance adjusting device, and is used to issue an alarm that the electric equipment is charged when the distance between the heat source and the electric equipment is less than the alarm distance.

Further, the box is also provided with:

A humidity sensor is arranged in the box to detect the real-time humidity inside the box;

a comparator, connected to the humidity sensor to compare the real-time humidity with a preset humidity;

A dehumidifier connected to the comparator to dehumidify when the real-time humidity is greater than the preset humidity.

Beneficial effect:

Compared with the existing related technologies, this technical solution has the following beneficial effects:

By setting the current sensor in the power distribution cabinet, when the human body touches the current sensor, the current sensor transmits the signal to the filter in the protection device. After the signal passes through the filter, it is divided into two channels, and one channel is amplified by the first amplifier. The other way to the relay reaches the alarm device after being amplified by the second amplifier. The relay cuts off the power supply after receiving the signal, and the alarm device alarms after receiving the signal, thus achieving the purpose of protecting the safety of the operator and avoiding the occurrence of electric shock accidents.

Description of drawings

Fig. 1 is the structure diagram of this anti-shock distribution box;

Fig. 2 is the front view of this anti-shock distribution box;

Fig. 3 is a structural schematic diagram of the electric shock prevention circuit.

detailed description

The technical solution will be further described below in conjunction with the accompanying drawings of the description.

Example 1

As shown in Figures 1 to 3, the electric shock-proof distribution box of this embodiment, the distribution box 1 in this embodiment includes an open box body composed of a top plate, a bottom plate, a left side plate, a right side plate, and a rear side plate. The front side opening of the open box body is closed by the front side frame 31 and the front door, and the door includes a left side door 32 and a right side door 33 that can be opened and closed, and the outer surface of the left side door 32 has a plurality of LED display lamps 322 . When there are multiple LED display lamps 322, they are arranged in rows or columns in parallel. The LED display lamps 322 on these doors are corresponding to each main power line in the distribution box. And the front door is made of thin steel plate, it is difficult to observe the internal situation from the outside, which is not conducive to maintenance. And using this LED display light 322, when the power distribution box is in normal use, the LED normally emits light, and when the internal power of the box is abnormal, the light of the LED will be strengthened or weakened, and the LED display light 322 can be simple and intuitive The integrated power status in the box can be displayed accurately, and the integrated power status in the distribution box can be indicated according to the brightness, which is beneficial for the staff to adjust the power distribution.

In this embodiment, at least one of the left side panel and the right side panel includes a louver 21 opening downward. Further optionally, the louvers 21 are arranged symmetrically at the lower parts of the two side panels of the distribution box. In this way, the heat in the box can be dissipated from the louver 21, avoiding the failure of electrical components due to overheating and prolonging the service life of the electrical components. In addition, although not shown in the figure, a dust-proof net is provided inside the louver 21 to effectively prevent dust, flying insects, etc. from entering the distribution box.

The front door also includes a groove 332, which can be used to place a nameplate or other relevant information related to the distribution box. Simultaneously, on the left side door 32 and the right side door 33, comprise two grooves 321) that are used to facilitate opening the door, and on one of the doors, also include the keyhole 333, described keyhole 333 is used for locking. The front door prevents other personnel from opening the distribution box, which may cause hidden dangers to the safety of the distribution box.

The anti-shock distribution box of this embodiment includes a connected power distribution cabinet 1 and a protection device 7. A sensor 8 is arranged in the power distribution cabinet 1, and a filter 2 is arranged in the protection device 7. On the one hand, the filter 2 is sequentially connected with the first An amplifier 3 and a relay 4 are connected, and the filter 2 is connected with the second amplifier 10 and the alarm device 6 successively on the other hand. connected, the alarm device 6 is provided with a buzzer 9.

In this embodiment, under the condition that the equipment does not stop running, when the equipment has a problem and needs to be repaired or checked by the operator, when the operator is operating in the power distribution cabinet 1, if any device is charged on the surface at this time, the sensor 8 will The current signal will be received, the sensor 8 will transmit the current signal to the filter 2 in the protection device 7, and the signal filtered by the filter 2 will reach the first amplifier 3 all the way, and the first amplifier 3 will transmit a relatively small current The signal is converted into a larger current signal and transmitted to the relay 4. Another signal from the filter 2 reaches the alarm device 6 through the second amplifier 10. The current signal reaches the power supply 5 after passing the relay 4, and the power supply 5 is cut off. At the same time , The buzzer 9 in the alarm device 6 sends out an alarm sound to remind the operator that the surface of the device in the cabinet is charged to avoid the risk of electric shock.

The box is also provided with a lightning protection power supply circuit. The lightning protection power supply circuit includes: a lightning protection circuit, an indicating circuit and an output circuit, wherein the input end of the lightning protection circuit is connected to the power supply system, and the lightning protection circuit The output end is connected with the output circuit, and is used for eliminating the lightning surge voltage entering from the power supply system.

The lightning protection circuit includes: a first-stage discharge circuit, a second-stage blocking circuit and a third-stage clamping circuit, wherein the first-stage discharge circuit, the second-stage current-blocking circuit and the third-stage clamping circuit The three are electrically connected in sequence to realize three-level protection against lightning voltage surges.

When protecting against lightning, the voltage threshold is preset in the first-stage discharge circuit. When the external voltage exceeds the voltage threshold, the discharge element in the first-stage discharge circuit will discharge to the ground instantaneously within 25ns Lightning current; at the same time, the second-level blocking circuit is used to prevent the lightning current from continuing to pass through; finally, the third-level clamping unit is used to limit the passage of excessive lightning surge voltage and clamp the output voltage within a safe value.

The output terminal of the output circuit is connected with the equipment to be protected, and is used for supplying power to the equipment to be protected. In addition, the lightning protection power supply circuit can also provide normal power supply while performing lightning strike protection.

In addition, in order to facilitate the operator to understand the working status of the lightning protection circuit, an indicator circuit can also be set in the lightning protection circuit, and the indicator circuit is connected to the lightning protection circuit for connecting each circuit in the lightning protection circuit Phase current and voltage are displayed.

In order to increase the lightning protection performance of the anti-shock distribution box, the ground wire of the lightning protection circuit can also be connected with the system ground wire of the equipment to be protected, that is, the ground wire of the lightning protection circuit and the system ground wire of the equipment to be protected are implemented. Equipotential bonding, so that the power supply system of all equipment to be protected is at the same basic potential.

In this embodiment, the lightning surge voltage entering from the power supply system is eliminated in three stages through the first-stage discharge unit, the second-stage current blocking unit, and the third-stage clamping unit by using the lightning protection power supply path provided in the box, and then It can avoid lightning surge voltage from being damaged by the power supply system to the equipment to be protected.

Example 2

The anti-shock distribution box of this embodiment, on the basis of Embodiment 1, adds a grounding wire at the bottom of the box body, and the grounding wire is connected to the bottom of the box body of the distribution box to connect the distribution box The static electricity is timely introduced to the ground and released. Since there are many charged wires at the bottom of the distribution box, in order to overcome the current from the connected grounding wire to the box body of the distribution box when some wires leak, which will cause electric shock danger, the present invention also adds an electric wire on the grounding line Diode, the positive end of the diode is connected to the body of the distribution box. When the electrostatic charge is accumulated on the body of the distribution box, the diode is turned on, and the electrostatic charge is conducted to the ground, reducing the harm of static electricity to the human body; at the same time, using The one-way conduction performance of the diode has prevented the reverse flow of the ground wire current to the top of the distribution box, and completely eliminated the electric shock accident caused by the electrification of the ground wire.

Example 3

The anti-shock distribution box of this embodiment, on the basis of Embodiment 1, the box is also provided with:

A humidity sensor is arranged in the box to detect the real-time humidity inside the box;

a comparator, connected to the humidity sensor to compare the real-time humidity with a preset humidity;

A dehumidifier connected to the comparator to dehumidify when the real-time humidity is greater than the preset humidity.

The humidity sensor is arranged in the box body, and can detect the real-time humidity inside the box body. The comparator is connected with the humidity sensor, and the humidity sensor sends the detected real-time humidity signal in the cabinet to the comparator, and the real-time humidity in the cabinet detected by the humidity sensor is compared with the preset humidity in the comparator. When the real-time humidity is greater than the preset humidity, the comparator sends out a dehumidification signal. The dehumidifier is connected with the comparator, and the dehumidifier performs dehumidification when it receives a dehumidification signal. The above-mentioned structure adopts automatic control of the air humidity in the box to effectively adjust the air humidity inside the box, thereby effectively ensuring the safe operation of the power distribution equipment, improving the reliability of power supply, and ensuring that the people will not suffer economic losses. At the same time, the above-mentioned structure adopts an automatic control method instead of a manual control method, which effectively ensures that the operating personnel will not be harmed and effectively reduces the work intensity of the operating personnel.

In each of the above-mentioned embodiments, a lighting device is provided inside the box, and the lighting device includes at least one lamp body and a push-type switch, and the lamp body is connected to the push-type switch. Due to the adoption of the above technical scheme, when the staff installs and maintains the internal facilities of the distribution box, the lighting in the distribution box is good, no need to carry additional light sources, and the operation is more convenient; it has the advantages of simple structure, convenient maintenance, and low processing cost. .

In each of the above-mentioned embodiments, the back of the front door is provided with a vertical interlayer parallel to the front door, and the interlayer and the front door form an up-down interlayer channel. The upper port of the interlayer channel is provided with a fan, and the fan outlet is connected to the interlayer channel The upper port is serially connected.

In each of the above embodiments, the front door is sequentially composed of an inner layer, a middle layer and an outer layer from the inside to the outside, and the inner layer is respectively provided with a radiation-proof layer and a sealing layer from the inside to the outside, and the middle layer is an anti-leakage layer and a sealing layer. A double-layer structure composed of fireproof layers, the outer layer is a high-strength insulating armor layer, and an insulating anti-vibration mount is also provided outside the front door.

In each of the above embodiments, an intelligent indicating device is provided inside the box, and the intelligent indicating device includes:

Switches, indicating devices and alarm devices, wherein,

said switch for activating or deactivating said indicating device;

The indicating device is connected to the switch, and is used to indicate that the electric equipment is in a charged state after the indicating device is activated;

The alarm device, connected to the switch, includes: a thermal sensor, an alarm distance adjustment device and an alarm, wherein,

The alarm distance adjustment device is used to set the alarm distance;

The thermal sensor is used to detect the distance between the heat source and the electrical equipment;

The alarm is connected between the thermal sensor and the alarm distance adjusting device, and is used to issue an alarm that the electric equipment is charged when the distance between the heat source and the electric equipment is less than the alarm distance.

Claims (10)

1. A kind of anti-shock distribution box, it is characterized in that: comprise the open box body that is made of top plate, bottom plate, left side plate, right side plate, rear side plate, the front side opening of described open box body is formed by front side frame Closed with the front door, the front door includes a left door and a right door that can be opened and closed. On the one hand, the filter is connected to the first amplifier and the relay in sequence; on the other hand, the filter is connected to the second amplifier and the alarm device in sequence, and the relay is also connected to a power supply. 2. The anti-shock distribution box according to claim 1, characterized in that: a lightning protection power supply circuit is also provided in the box, and the lightning protection power supply circuit includes: a lightning protection circuit, an indicating device and an output unit, wherein , the input end of the lightning protection circuit is connected to the power supply, and the output end of the lightning protection circuit is connected to the output unit, which is used to eliminate the lightning surge voltage entering from the power supply system; The lightning protection circuit includes a first-stage discharge unit, a second-stage current-blocking unit, and a third-stage clamping unit that are sequentially connected; The indicating device is connected with the lightning protection circuit, and is used to display the current and voltage of each phase in the lightning protection circuit; The output terminal of the output unit is connected with the equipment to be protected, and is used for supplying power to the equipment to be protected. 3. The anti-shock distribution box according to claim 1, characterized in that: the left side panel and the right side panel are provided with louvers, the opening of the louvers is downward, and gauze is arranged inside the louvers. 4. The anti-shock distribution box according to claim 1, characterized in that: the inside of the box is provided with a lighting device, the lighting device includes at least one lamp body and a push switch, and the lamp body and the push switch connect. 5. The anti-shock distribution box according to claim 1, characterized in that: the underside of the box body is provided with through holes and insulating pads for threading, and it is characterized in that a grounding line is added to the bottom of the box body The grounding wire is connected to the bottom of the box, and is used to guide the static electricity on the distribution box to the ground in time for discharge. 6. The anti-shock distribution box according to claim 5, wherein a one-way diode is added on the grounding wire, and the positive end of the one-way diode is connected to the box body of the distribution box. 7. The anti-shock distribution box according to claim 1, characterized in that: the back of the front door is provided with an interlayer in the vertical direction parallel to the front door, and the interlayer and the front door form an interlayer passage in the up and down direction, and the interlayer passage The upper port of the fan is provided with a fan, and the air outlet of the fan is connected in series with the upper port of the interlayer channel. 8. The anti-shock distribution box according to claim 1, characterized in that: the front door is sequentially composed of an inner layer, a middle layer and an outer layer from the inside to the outside, and the inner layer is respectively provided with radiation protection from the inside to the outside. Layer and sealing layer, the middle layer is a double-layer structure composed of an anti-leakage layer and a fireproof layer, the outer layer is a high-strength insulating armor layer, and an insulating and shock-resistant mount is also provided outside the front door. 9. The anti-shock distribution box according to claim 1, characterized in that: the box body is provided with an intelligent indicating device, and the intelligent indicating device includes: Switches, indicating devices and alarm devices, wherein, said switch for activating or deactivating said indicating device; The indicating device is connected to the switch, and is used to indicate that the electric equipment is in a charged state after the indicating device is activated; The alarm device, connected to the switch, includes: a thermal sensor, an alarm distance adjustment device and an alarm, wherein, The alarm distance adjustment device is used to set the alarm distance; The thermal sensor is used to detect the distance between the heat source and the electrical equipment; The alarm is connected between the thermal sensor and the alarm distance adjusting device, and is used to issue an alarm that the electric equipment is charged when the distance between the heat source and the electric equipment is less than the alarm distance. 10. The anti-shock distribution box according to claim 1, characterized in that: the box is further equipped with: A humidity sensor is arranged in the box to detect the real-time humidity inside the box; a comparator, connected to the humidity sensor to compare the real-time humidity with a preset humidity; A dehumidifier connected to the comparator to dehumidify when the real-time humidity is greater than the preset humidity.