Spark protection assembly

FIELD: electrical engineering, particularly devices preventing sparking of machines or apparatus used in chemical, oil refinery, gas-processing, metal mining industries, of portable equipment provided with built-in storage batteries, for instance mine lamps.

SUBSTANCE: device comprises electronic key to be connected to electrical consumer, control switch to control electronic key, overcharge signaling sensor and commutation signaling sensor, which are made as transformers, "OR" circuit, trigger, voltage doubler, integrating circuit and voltage divider. The device additionally has controller and monostable multivibrator.

EFFECT: simplified structure along with increased sensitivity and extended functional capabilities.

3 cl, 1 dwg

 

The object that is claimed, relates to electrical engineering and is intended to provide intrinsically safe power supply explosion-proof electrical engineering in chemical, oil refining, gas processing, mining, portable devices with built-in batteries, in particular, to provide intrinsically safe power supply explosion-proof head rechargeable mining lamps.

Known spark protection unit, which contains an electronic key with the point of connection to the electricity consumer, the key management of the electronic key, the output of which is connected to a control input of an electronic key, the sensor signal when the overload and the sensor signal during switching, which is connected in series with the electronic key in the channel electricity consumers, and their outputs are connected with the control circuit of the electronic key. When this sensor signal when the overload sensor signal switching are, respectively, the resistor and the inductor (see the description of the invention to author's certificate SU # 1567796, IPC F 21 L 11/00, 1990, bull. No. 20).

The object is declared, and similar match the following essential features: blocks spark protection contain an electronic key with the point of connection to the electricity consumer, the key management of the electronic key, the output of which is connected upravlajushemu input of an electronic key, the sensor signal when the overload and the sensor signal during switching, which is connected in series with the electronic key in the channel electricity consumers, and their outputs are connected with the control circuit of the electronic key.

To obtain the expected technical result when using analog prevent the following reasons. The use of resistor and inductor, respectively, a signal sensor g-sensor signal switching does not provide high sensitivity spark protection unit at the time of connection of the consumer electricity to the power source, or when reloading and switching devices with built-in batteries, because the increased sensitivity leads to higher voltage drops on these sensors and the voltage reduction on the electricity consumer.

The closest set of features to the object that is claimed, is selected as a prototype, the spark protection unit, which contains an electronic key with the point of connection to the electricity consumer, the key management of the electronic key, the output of which is connected to a control input of an electronic key, the scheme selection signal when the overload and the circuit selection signal switching, which is connected to the key control electronic key. Scheme selection signal for switching the holding sensor signal switching in the form of a transformer, the rectifier bridge and is connected to the output of the bridge, the pulse generator, the output of which is connected to one input schema "OR". Scheme selection signal g contains a sensor signal when the overload in the form of a transformer, resistor, voltage reference, comparator, pulse generator and schemes "And". Moreover, the output of the pulse generator is connected to the resistor, a second output of which is connected with the secondary winding of the transformer of the sensor signal at overload with one of the inputs of the comparator. To the second comparator input connected to the output of the reference voltage, and outputs of the comparator and pulse generator connected to the circuit "And". The sensor signal g and the signal sensor when switching is made in the form of transformers, the primary windings are connected in series with the electronic key in the channel electricity consumers. When this signal sensor g-sensor signal for switching is connected through the first and second inputs of the scheme "OR" and the trigger to the key management of the electronic key. Additionally, the output of the pulse generator is connected through a voltage doubler and an integrating circuit to the control input of an electronic key (see the description of declarative patent of Ukraine # 49348, IPC E 21 F 9/00, 2002, bul. No. 9).

The object is declared, and the prototype is consistent the with the following essential features: blocks spark protection contain an electronic key with the point of connection to the electricity consumer, the key management of the electronic key, the output of which is connected to a control input of an electronic key, the sensor signal when the overload and the sensor signal during switching, which is made in the form of transformers, the primary windings are connected in series with the electronic key in the channel electricity consumers. When this signal sensor g-sensor signal for switching is connected through the first and second inputs of the scheme "OR" and the trigger to the key management of the electronic key, and the input of the sensor signal when the overload is connected to the voltage doubler, which, through an integrating circuit connected to the control input of an electronic key.

Analysis of the technical properties of the prototype, due to its characteristics, shows that the expected technical result when using prototype prevent the following reasons. The prototype of the electronic key management during overloads and switching is carried out with high sensitivity by using relatively complex schemes selection signals during overloads and switching, which contain relatively many items that you can't create a block spark protection compact size. In addition, in the prototype at the time of connection of the consumer electricity to power supply are not able to do so that the speed at which astania current practically does not depend on the value of the source voltage. This unit also has no influence on the battery power source.

The basis of the technical solution of the task - to create the spark protection unit, in which the improvement by introducing new elements and new relationships between the elements that would allow for use of an object, which is claimed to achieve a technical result, which is to simplify the design while providing high sensitivity and extending the functionality of block spark protection.

Block spark protection, which States, aimed at solving the problem contains an electronic key with the point of connection to the electricity consumer, the key management of the electronic key, the output of which is connected to a control input of an electronic key, the sensor signal when the overload and the sensor signal during switching, which is made in the form of transformers, the primary windings are connected in series with the electronic key in the channel electricity consumers. When this signal sensor g-sensor signal for switching is connected through the first and second inputs of the scheme "OR" and the trigger to the key management of the electronic key, and the input of the sensor signal when the overload is connected to the voltage doubler, which, through an integrating circuit connected to the control input of an electronic key. The distinctive feature of this unit spark protection is that the spark protection unit further comprises a controller and a one-shot. Thus the output of the circuit OR connected to the first input of one-shot, the second input of the one-shot and the R-input of the trigger is connected to the third output of the controller, and the output of the one-shot is connected to the S input of the flip-flop. The first input of the controller through the voltage divider is connected to the connection point e of the key energy consumer, and the third input of the controller is connected to the output of one-shot. The first output of the controller is connected to the connection point of the sensor signal during overloads and voltage doubler, and the second output of the controller is connected to the third input schema "OR".

In some cases, the use of the spark protection unit, which is claimed, characterized by the fact that, in parallel with the electronic key cathode to the point of its connection to the electricity consumer connected diode. Additionally, the second input of the controller through the voltage divider may be connected to the channel for connection to a power source of the electric consumer.

When using spark protection unit, which is claimed, you can expect the achievement of the technical result, which is to simplify the design while maintaining high sensitivity. Additional technical the result is to extend the functionality of block spark protection.

Between the set of essential features of spark protection unit, which is claimed, and the technical result is achieved, there is the following cause-and-effect relationship. Due to the fact that the spark protection unit includes a one-shot set between the scheme "OR" trigger, which gives the opportunity to expand the error signal, and provides the controller, the input of which is connected to the connection point e of the key consumer of electricity, and to output the one-shot, and the outputs of the controller is connected to the second input of one-shot, to the voltage doubler, to the third input schema "OR" and to the R input of the trigger simplifies the design of the control circuit of the electronic key while maintaining high sensitivity. Analog inputs allow measurement of the voltage at the input/output of an electronic key to perform the measurement of the voltage of the power source, and to control operation of the protection.

The controller is capable of generating the required pump frequency to control an electronic key and a signal sensor g - magnetic sensor maximum current and direct mode of operation of the trigger. When the input voltage controller at the time of connection of the consumer to a power source, a controller, a short pulse from the output of Y3both the accounts for the opening of the electronic key and generates a pulse signal (from the output of F 1), whose period is a function of the source voltage, which makes the rate of increase of current energy consumer, is practically independent of the voltage of the power source. In some cases, if parallel electronic key cathode to the point of its connection to the electricity consumer connected diode and/or the second input of the controller through the voltage divider is connected to the channel for connection to a power source electricity consumers, with spark protection unit, which is claimed, and the charger, you can charge the battery power source. The controller may control the voltage of the power source, to block the work of protection and to generate a pulse signal for opening the e key for the implementation of the battery and regulate electronic key value of the charging current. All of the above assists in enhancing the capacity of the spark protection unit.

The essence of the design of the spark protection unit, which is claimed, is illustrated graphic material, which shows a schematic block spark protection for mining explosion-proof head rechargeable lamp.

On the graphic material is Yale bear such legend:

1 - Electronic key;

2 - Point connection, an electronic key with electricity consumer;

3 - Headlight;

4 - Key control electronic key;

5 - the control input of the electronic key;

6 - Sensor signal in case of overload;

7 - Sensor signal switching;

8, the Primary winding of the transformer sensor signal in case of overload;

9, the Primary winding of the transformer sensor signal switching;

10 - Scheme "OR";

11 - Trigger;

12 is a voltage Doubler;

13 is an Integrating circuit;

14 Controller;

15 - one-shot;

16 - power;

17 - Control contacts;

18 - Charging contact;

19 - Charging contact;

20 - Diode;

R1- Resistor;

R2- Resistor;

R3- Resistor;

R4- Resistor;

R5- Resistor;

R6- Resistor;

U1The first input of the controller;

U2The second input of the controller;

U3The third input of the controller;

F1The first controller output;

Y2The second output controller;

Y3The third output of the controller.

In the specific example of implementation, the block spark protection for mining explosion-proof head rechargeable lamp contains an electronic key 1, made for example in the form of a MOS transistor, to control which uses the potential h is its input. The electronic key 1 in the point 2 connected to the power consumer, the lamp 3. The spark protection unit also contains key 4 control electronic key, the output of which is connected to the control input 5 of the electronic key 1, the signal sensor g-6 and the sensor signal switching 7, which are made in the form of a transformer, the primary winding 8 and 9 connected in series with the electronic key 1 in the channel-consumer - lights 3. When this signal sensor g-6 and the sensor signal switching 7 is connected through the first and second inputs to the scheme "OR" 10. The trigger 11 is connected to the key 4 control electronic key 1 and the sensor input signal in case of overload 6 is connected to the voltage doubler 12, through which the integrating circuit 13 is connected to the control input of the electronic key 1. The spark protection unit further comprises a one-shot 15 for the extension of the error signal. Thus the output of the circuit "OR" 10 connected to the first input of one-shot 15, the second input of the one-shot 15 and R-input of the trigger 11 is connected to the third output Y3controller 14, and the output of the one-shot 15 is connected to the S input of the trigger 11. The first input U1controller 14 through the voltage divider R3-R4connected to the connection point 2 of the electronic key 1 energy consumer - spotlight 3. The third input U31controller 14 is connected to the connection point between the sensor signal at 6 overloads and voltage doubler 12. The second output Y2controller 14 is connected to the third input schema "OR" 10. Electricity consumer - headlight 3 is connected to the power source control contacts 16 and 17. To ensure the battery power source 16 directly in the case of miner's lamp on the lamp 3 mounted charging contacts 18 and 19. With this design a mining explosion-proof head rechargeable lamp parallel to the electronic key 1 cathode to point 2 and its connection to the headlight 3 is connected diode 20, and the second input U2controller 14 through the voltage divider R1-R2connected to the battery power source 16.

In the mining explosion-proof head rechargeable lamp unit spark protection, which States, works well. In the initial state, if the control terminals 17 are opened and the power consumer - the headlight 3 is disconnected from the power source 16, the trigger 11 is in a single state, the transistor key 4 control electronic key 1 is open, and fixes the zero potential at the control input 5 of the electronic key 1. While the electronic key 1 is closed regardless of the state of the drive circuit. When deputies who are assured of governors of the contacts 17 and the lamp 3 is connected to the battery of the power source 16 and to the input of the controller 14 of the lamp 3 through the voltage divider R 3-R4supplied voltage. The controller 14 short pulse from the output of Y3" puts the trigger 11 in the zero state. When this transistor key 4 control electronic key 1 is closed, removing the blocking of the electronic key 1. The first output "F1" controller 14 generates a pulse signal whose period is a function of the voltage of the power source 16, which gives you the opportunity to make the speed increase of the current to the lamp 3 is virtually independent of the magnitude of the voltage of the power source. This signal is applied to a voltage doubler 12, the output of which is formed a potential approximately equal to twice the battery voltage of the power source 16. Through the integrating circuit 13 and the resistor R5this potential is supplied to the control input 5 of the electronic key 1. The integrating circuit 13 slows down the increase of the voltage at the control input 5 and therefore the current through the cold hair bulbs lights 3 will not exceed allowable values. When overloaded or when the switching signal from the sensor 6 signal in case of overload or sensor 7 signal switching goes through the scheme "OR" 10 and the one-shot 15 on the trigger 11, which is installed in one state. When this transistor key 4 control electronic key 1 is opened and the control input 5 electronic is th key 1 is zero potential, which leads to the closure of the electronic key 1 and turn off the lights 3 from the power source 16, regardless of the value of the potential at the output of the integrating circuit 13. Simultaneously, the signal from the one-shot 15 is supplied to the controller 14, which terminates the generation of pulses at the output "F1" and the signal "Y2" scheme "OR" 10 captures the individual state of the trigger 11, wherein the electronic key 1 is closed regardless of the state management scheme.

To ensure the battery miner's lamp to the charging contacts 18 and 19 which are mounted on the headlight 3, connects the charging voltage, which is set taking into account the voltage drop on the electronic key (0,035) to provide the required charging current. The charging current which flows through the circuit: charging contact 18 ("+" source charge) - rechargeable battery 16 - "common wire" spark protection unit (with the primary windings 9 and 8 transformers sensor signal switching 7 and the sensor signal when the overload 6) - diode 20 - point 2 connection of an electronic key with electricity consumer connected to the first input U1controller 14 is charging contact 19 ("-" source charge), creates due to the voltage drop on the diode 20 negative electric potential at the input of the controller 14. A controller receiving input this is the signal to begin charging the battery, managing potential from the output "Y3" puts the trigger 11 in the zero state, while blocking the operation of the circuit overload protection and switching. Simultaneously, the output "F1" controller 14 generates a pulse signal, which, affecting the control input 5 of the electronic key 1, opens it and in the mode of operation of the headlights 3. But now the electronic key 1, which is made in the form of a MOS transistor that operates in the inverse mode. As outdoor electronic key 1 is for diode 20 shunt (voltage drop across the electronic key - less than 0.04), and the diode is 0.7 V), the charging current will increase to the nominal value. After that, the controller 14 starts the timer and through, for example, 12 hours to stop generating the output signal Y3and generates at the output a3the signal received through the scheme "OR" 10 and the one-shot 15 on the trigger 11 and sets it in one state. When this transistor key 4 control 11 electronic key 1 is opened and the control input 5 of the electronic key 1 is zero potential, which leads to the closure of the electronic key 1. Now charging current supplied to the battery 16 through the diode 20, which is connected in parallel to the electronic key 1. But the voltage on the battery, which increased after the charge, and the voltage drop at the diode significantly reduce charging current (up to 50-100 mA), that makes it safe for long battery miner's lamp in the storage mode. This charging current does not exceed the value of the current charging the battery (300 mA), which is not issued in operation. In this state, rechargeable lamp may be located on the charging station in the storage for a long time.

In addition, when the battery charge controller 14 has the capability through, for example, every two minutes to control through the voltage divider R1-R2the voltage on the battery, which is recharged. To improve the accuracy of the control voltage on the battery that is being charged, the controller 14 is able to close the electronic key 1 at the time of this control that by reducing the charging current reduces the effects of voltage drop on the battery to the control. If the voltage on the battery during the charge reaches the set value, the controller 14 generates the output signal "Y2"that comes through the scheme "OR" 10 and the one-shot 15 on the trigger 11 and sets it in one state, which leads to the closure of the electronic key 1 and translates miner's lamp in the storage mode.

Thus, with the use of spark protection unit, which claimed doctoralthesis result, which is to simplify the design while providing high sensitivity and extending the functionality of block spark protection. In addition, it reduces overhead cost of electricity to charge the battery more than necessary, and it is easier to recharge batteries that are not issued in operation, by automatically ensure their charge in storage mode on the same, and not on another charging station.

1. The spark protection unit containing the electronic key with the point of connection to the electricity consumer, the key management of the electronic key, the output of which is connected to a control input of an electronic key, the sensor signal when the overload and the sensor signal during switching, which is made in the form of transformers, the primary windings are connected in series with the electronic key in the channel electricity consumers, and the sensor signal g and the signal sensor when switching is connected through the first and second inputs of the circuit OR trigger to the key management of the electronic key, and the input of the sensor signal when the overload is connected to the voltage doubler, which, through an integrating circuit connected to control input of the electronic key, wherein the spark protection unit further comprises a controller and a one-shot, the ri the output of the circuit OR connected to the first input of one-shot, second input of the one-shot and the R-input of the trigger is connected to the third output of the controller, and the output of the one-shot is connected to the S input of the trigger, the first input of the controller through the voltage divider is connected to the connection point e of the key energy consumer, the third input of the controller is connected to the output of one-shot, the first output of the controller is connected to the connection point of the sensor signal during overloads and voltage doubler, the second output controller connected to the third input of the circuit OR.

2. The spark protection unit according to claim 1, characterized in that parallel to the electronic key cathode to the point of its connection to the electricity consumer connected diode.

3. The spark protection unit according to claim 1 or 2, characterized in that the second input of the controller through the voltage divider is connected to the channel for connection to a power source of the electric consumer.



 

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