RU212614U1 - Explosion-proof charger - Google Patents

Abstract

The utility model relates to explosion-proof equipment and can be used in industrial enterprises, in particular underground workings of mines, mines and their surface structures, including those hazardous for gas and / or dust and areas where an explosive atmosphere is likely to occur in the form of gas, steam, fog; in oil and gas companies. The technical result of the utility model is the creation of a reliable device capable of safely carrying out the process of charging explosion-proof batteries directly in explosive places of their operation. The technical result is achieved in that the utility model is equipped with an explosion-proof housing, made with the possibility of placing in it for charging an explosion-proof battery and provided with a cable for connecting it, while the cable for connecting an explosion-proof battery is equipped with a connecting node, made with the possibility of creating an explosion-proof connection with the return part of the explosion-proof battery connector. 6 w.p. f-ly, 22 ill.

Description

The utility model relates to explosion-proof equipment and can be used in industrial enterprises, in particular underground workings of mines, mines and their surface structures, including those hazardous for gas and / or dust and areas where an explosive atmosphere is likely to occur in the form of gas, steam, fog; in oil and gas companies.

At present, the task of ensuring the uninterrupted operation of explosion-proof power tools is acute in explosive areas of enterprises. To this end, the applicant of the present utility model has developed a number of portable cordless tools. At the same time, it is currently not possible to charge portable explosion-proof batteries of these tools directly in their operating conditions. To ensure the operation of these devices, it is necessary to deliver batteries to their charging points located outside the explosive areas of operation.

The state of the art today includes a variety of devices for charging electrical appliances, from the simplest, which serve to directly transfer electricity from the mains to the electrical appliance and represent an electrical wire that can be connected to both the mains and the device, to quite complex ones, including various electronic control units. and transformation of electricity.

Widely known industrial chargers manufactured by various manufacturers (see, for example: https://batteryservice.ru/catalog_cat/promyshlenennye-zaryadnye-ustrojstva/), including a housing with a voltage converter installed in it, can also include rectifiers, voltage stabilizers, various electronic units for monitoring the charging process, means of indication. The disadvantage of all these devices is the impossibility of their operation in explosive conditions due to the lack of explosion protection in their design.

Known explosion-proof charger

(https://web.archive.org/web/20210410183242/https://orga.nl/power-solution-products/battery-enclosures/ex-battery-charger/), which includes frame-mounted explosion-proof enclosures in which placed for charging batteries.

The disadvantage of this device is the inability to provide a full cycle of operation of explosion-proof power tools in explosive conditions.

This device is not designed to charge explosion-proof batteries required to operate an explosion-proof power tool. It does not contain means of explosion protection (in particular, explosion-proof connection of current-carrying parts of the device with an explosion-proof battery), which can lead to a fire when the battery is connected to the device or when it is disconnected.

The objective of the utility model is to provide a full cycle of operation of explosion-proof power tools in explosive conditions.

The technical result of the utility model is the creation of a reliable device capable of safely carrying out the process of charging explosion-proof batteries directly in explosive areas of their operation.

The technical result is achieved primarily by the fact that the claimed device includes an explosion-proof housing, made with the possibility of placing in it for charging an explosion-proof battery and provided with a cable for connecting it, while the cable for connecting an explosion-proof battery is equipped with a connecting node, made with the possibility of creating an explosion-proof connection with a mating connector for an explosion-proof battery.

The following design features of the device in the preferred embodiment also contribute to the achievement of the technical result.

The explosion-proof charger can be equipped with an encoder controller that sends a signal recognized by the identifier controller introduced into the explosion-proof battery circuit.

The connector of the explosion-proof battery connection cable can be equipped with a union nut.

The explosion-proof body of the device can be made cylindrical with an end door and equipped with an electromechanical interlock that excludes the possibility of turning on the device with the door open and an unconnected explosion-proof battery.

The device can be equipped with a transformer capable of being powered from 127 V, 220 V, 660 V and 1140 V networks, as well as a hardware unit that includes a switching power supply and a control board.

The device can be equipped with cable glands equipped with rubber rings and made with the possibility of connecting a network cable of various diameters to them.

The explosion-proof charger may be equipped with an electronic control circuit designed to limit the peak voltage and maximum charge current during charging of the explosion-proof storage battery.

The utility model is illustrated in the drawing, where the figures show the following views.

In FIG. 1 shows an explosion-proof charger in isometric projection.

In FIG. 2 shows the main view of the explosion-proof charger

In FIG. 3 shows a view of the explosion-proof charging device from the side of the hardware compartment.

In FIG. 4 shows a view of the explosion-proof charging device from the side of the transformer compartment.

In FIG. 5 shows a rear view of the explosion-proof charger.

In FIG. 6 shows a view of the explosion-proof charging device in section A-A, marked in FIG. 3.

In FIG. 7 shows a view of the explosion-proof charging device in section B-B, marked in FIG. 2.

In FIG. 8 shows a view of the explosion-proof charging device in section C-C, marked in FIG. 2.

In FIG. 9 shows the explosion-proof assembly E marked in FIG. 7.

In FIG. 10 shows the explosion-proof assembly F marked in FIG.

In FIG. 11 shows a view of the explosion-proof charger from the side of the hardware compartment with the door removed

In FIG. 12 shows node D, marked in FIG. eleven

In FIG. 13 shows the label on the cover of the cable entry compartment.

In FIG. 14 shows the plate inside the cable entry compartment.

In FIG. 15 shows the plate on the cover of the transformer compartment.

In FIG. 16 shows the label on the hardware compartment door.

In FIG. 17 shows the explosion protection label.

In FIG. 18 shows a plate with the designation of light indication.

In FIG. 19 shows a plate on the locking disc indicating the directions of rotation of the clamping mechanism handle.

In FIG. 20 shows a plate with a symbol for grounding.

In FIG. Figure 21 shows a plate on the case at the power-on handle indicating the direction of movement of the power-on handle.

In FIG. 22 shows an explosion-proof connector for connecting an explosion-proof battery.

In the drawing, the positions show:

1. Body

2. Hardware compartment door

3. Transformer compartment cover

4. Compartment for cable entries

5. Locking mechanism

6. Hardware block

7.Lock lock mechanism

8. Bracket for circuit breakers

9. Case base

10. Explosion proof battery lock

11. Explosion-proof battery connection cable

12. Cable glands

13. Male part of the explosion-proof connector

14. Handle of the locking mechanism

15. Eccentric clamp

16. Ground clamps

17. Transport loops

18. Bushings

19. Transformer

20. A plate on the cover of the cable entry compartment with the inscription: "Warning - open by disconnecting from the mains"

21. A plate inside the cable entry compartment with a diagram for connecting the input voltage to the bushings

22. A plate on the cover of the transformer compartment with the inscription: "Warning - open by disconnecting from the mains"

23. Label on the door of the equipment compartment with technical data

24. Flameproof plate

25. Plate with the designation of light indication

26. Plate on the disk of the locking mechanism indicating the directions of rotation of the handle of the clamping mechanism "OPEN", "CLOSED".

27. Plates on the case with a symbol for grounding

28. A plate on the body at the power-on handle with indications of the directions of movement of the power-on handle "OFF", "ON"

29. Hardware compartment

30. Transformer compartment

31. Power handle

32. Cable entry cover

33. The front wall of the hardware compartment

34. Toggle switch input voltage

35. Explosion-proof battery

36. Viewing window

37. Character display

38. Union nut of the male part of the explosion-proof connection block

39. Light indicator

40. Clamping brackets for cable glands

41. Explosion-proof battery lock button

42. Circuit breakers

The explosion-proof charger can be used to restore the charge of explosion-proof batteries, as well as to carry out special events to ensure a long service life of these batteries.

The design of the proposed utility model involves the following preferred embodiment.

The explosion-proof charging device has an explosion-proof housing 1, including hardware 29 and transformer 30 compartments, as well as a compartment for cable glands 4 for connecting the power supply. The device is equipped with a permanently connected cable for connecting an explosion-proof battery 11 and electromechanical interlock elements designed to maintain the type and level of explosion protection.

The explosion-proof charger can be equipped with a voltage converter - transformer 19, to provide power from 127 V, 220 V, 660 V and 1140 V networks, as well as a hardware unit 6, including a switching power supply and a control board. The device can also be equipped with a voltage stabilizer. The input voltage is selected by switching the toggle switch 14 located on the front wall of the hardware compartment 33 inside the housing 1.

Cable glands 12 are installed on the cable entry compartment 4 with the ability to connect to them a network cable of various diameters corresponding to the connected voltage. Cable glands 12 are equipped with rubber rings that ensure reliable fixation and tightness of the cable gland compartment 4. Cable glands 12 are certified and are marked with the degree of explosion protection - РВ Ex d I Mb.

On the body 1 are installed: door 2 of the hardware compartment, cover 3 of the transformer compartment and cover 32 of the cable entry compartment. In order to ensure explosion protection of the device, door 2 is equipped with a locking mechanism 5 for pressing the door 2 to the body 1 and a locking mechanism with a lock 7 to prevent accidental opening of the door 2. Also on the body 1 there is a power-on handle 5, also equipped with a door locking mechanism 2, which allows prevent door 2 from opening in battery charging mode.

In order to ensure explosion safety, the explosion-proof charger is made in compliance with the requirements of GOST 31610.0-2014 (IEC 60079-0:2011), GOST IEC 60079-1-2011.

Compliance with the requirements of the above GOSTs is achieved by the following measures:

the conclusion of the current-carrying parts of the device and rechargeable explosion-proof batteries in an explosion-proof shell (case 1), which withstands the explosion pressure inside it and excludes the release of combustion products and the transfer of explosion energy into the surrounding explosive environment;

observance of electrical clearances and leakage paths between current-carrying parts necessary to ensure explosion safety;

electromechanical interlock, which excludes the possibility of turning on the device with an open door of the hardware compartment 2 and an unconnected explosion-proof battery 35.

In order to ensure protection against electric shock to people, the requirements of GOST R IEC 61140-2000 are met. This is facilitated by equipping the device with an electronic control circuit that limits the peak voltage during charging of explosion-proof batteries, and also limits the maximum charge current. This electronic control circuit also contributes to explosion protection, avoiding excessive heating of the battery being charged (and also helps to extend its service life) and burnout of the electronic components of the device.

Removable covers 3 and 32 and the door of the hardware compartment 2 have warning inscriptions: "Open by disconnecting from the mains."

The proposed device has internal and external grounding clamps 16, and grounding signs in accordance with GOST 21130.

Fire safety is ensured by the absence of flammable materials in the composition of the device.

Electrostatic intrinsic safety is ensured by the absence of plastics in the composition of the materials of the external parts of the device.

The explosion-proof housing 1 is ensured by a sufficient area of contact between the surfaces in detachable and movable joints, while these contact surfaces are made in compliance with the required level of roughness. Explosion-proofness is facilitated by sealing the connections of the device, in particular, by applying enamel on the surface of threaded connections. To seal the connections of the device, for example, enamel GF-92 XC (GOST 9151-75) can be used.

The execution of the body 1 in the form of a cylinder contributes to the optimal distribution of the load from the energy of the explosion in the event of an explosion in the body of the device, which eliminates the possibility of its deformation and transmission of the explosion into the surrounding explosive environment.

The input of the power cable is carried out through explosion-proof cable glands 12. When entering the power cable, it must be securely sealed with a rubber ring (in this case, rings with cutouts with a pitch of no more than 2 mm for the corresponding cable diameter must be used) and - to protect against pulling out - clamped with using special clamping clips 40. The surfaces of the sealing rings used must be marked with the minimum and maximum diameter of the power cable.

To ensure the explosion-proofness of the unused cable gland 12, plugs are used, made of materials that can withstand electrical, mechanical, thermal and chemical influences that may be in operation.

Creepage distances and electrical clearances of the device, as well as insulating materials, comply with GOST 30852.20.

A thin layer of lubricant can be applied to explosion-proof surfaces, for example, CIATIM-221 (GOST 9433-80).

The device can be painted, for example, with antistatic enamel by polymer powder painting.

The explosion protection of the device is also facilitated by the fact that at the free end of the cable 11 for connecting the explosion-proof battery there is a male part of the explosion-proof connecting device 13, equipped with a union nut 38, which provides an explosion-proof connection with the mating connector of the portable explosion-proof battery 35. The design of this assembly eliminates the occurrence of an electric arc when disconnecting and connecting contacts.

A feature of the claimed utility model is also the introduction of a friend or foe system that allows you to recognize the connection of the original explosion-proof battery and excludes the possibility of using a third-party battery, which additionally guarantees the exclusion of the possibility of violating the explosion safety standard. When an unknown battery is connected to the device, the loopback protection is activated and the battery is not powered. The device is equipped with a controller-encoder that generates a signal recognized by the controller-identifier introduced into the circuit of a rechargeable explosion-proof battery.

The design of the proposed utility model provides for an electromechanical lock portable explosion-proof battery 35, which operates as follows.

The charging process of the explosion-proof battery 35 starts only if the plug of the explosion-proof connector 13 is connected to the mating part of the battery connector 35, voltage is applied and the process of recognition of the connected equipment "friend or foe" at the software level. Magnets are located in the petals of the nut 38 of the male part 13, and reed switches are located under the battery cover 35 so that the battery connection does not work if the nut 38 is not completely tightened. When the magnets are located as close as possible to the reed switches, a connection is established between the battery and the explosion-proof charger control unit, after the exchange of information, the power contacts open, opening the supply of electric current. This ensures explosion-proof connection, the design of the connectors eliminates the occurrence of an electric arc when disconnecting and connecting contacts.

On the front wall of the hardware compartment 33 is a character display 37, designed to display the following information about the charging process of the explosion-proof battery 35:

a) activation of the charging channel;

c) charging current, A;

d) battery level indication, %;

e) voltage, V;

d) the current charge time from the moment the battery is connected to an explosion-proof charger, min.

The panel also has an input voltage switch 38 and a light indicator 38, consisting of three LEDs. Visual control is carried out through the viewing window 36 in the door of the hardware compartment 2. To simplify identification, different colors of LED signals can be used.

The light indication can act as follows:

The first LED is on - the presence of power at the input of the charger in the hardware compartment 29 is confirmed.

The second LED is on - there is no communication with the explosion-proof battery 35.

The third LED is on - the explosion-proof battery is being charged. The third LED flashes - the explosion-proof battery is charged. The main parameters and characteristics of the proposed explosion-proof charger are shown in the following table.

The device is connected to the power supply by means of a cable from a power source, such as APSh (mining launcher), or other devices. Before connecting, make sure that there is no voltage at the power source.

To bring the explosion-proof charger into working condition, the following steps must be performed.

1) Remove the cover 32 of the cable entry compartment.

2) Loosen the bolts on the cover 32.

3) Remove the plug of cable entry 12 corresponding to the cable connection to the mains.

4) Insert the mains connection cable through the cable entry 12. Tighten the cable entry screws 12. Tighten the clamping clamp 40.

5) Connect the cable to the bushings 18 according to the connection diagram, depending on the level of the connected voltage.

6) Install and securely fix the cover of the cable entry compartment 32 with bolts.

7) Make sure that the power switch 31 is in the "OFF" position.

8) Turn the lock of the locking mechanism 7 and open the hardware compartment door 2 by turning the locking mechanism 5 in the direction of "OPEN".

9) Install the male part of the explosion-proof connector 13 on the mating part of the explosion-proof battery 35.

10) Fix the male part of the explosion-proof connector assembly by tightening the union nut 38. Make full contact between the union nut and the pin section of the explosion-proof battery connector 35.

11) Bring the explosion-proof storage battery 35 to the “ON” position by pressing up the stopper button 41 located on the battery case (in this case, the indication on the viewing window of the battery should work). It is impossible to disconnect the cable 11 in this position until the stop button 41 is pressed (otherwise it interferes with the unscrewing of the union nut 38).

12) Install the explosion-proof battery 35 in the holder 10.

13) Fix the battery with the eccentric clamp 15.

14) Lead the connection cable of the explosion-proof storage battery 11 inside the explosion-proof case 1. Switch, if necessary, the toggle switch of the used input voltage 34 and close the front door of the hardware compartment 2. to make the device explosion-proof. Turn the lock of the locking mechanism 7. Removing the charged battery is carried out by performing steps 15-9 of the above algorithm of actions in reverse order.

The charging of the explosion-proof battery 35 is switched on by moving the power-on handle 31 to the "ON" position. In this case, the light indicator 39 and the character display 37 signal the operation of the charger.

When the battery is fully charged, the character display shows the charging time and the inscription - "READY".

Operation and maintenance of the device must be carried out by qualified personnel who have received special training or instruction in the rules of operation.

To comply with the state of explosion protection of the device, during operation it is necessary to perform the following actions: - cleaning the device from dust and dirt;

visual inspection of the device case for mechanical damage;

visual inspection of cables for mechanical damage, kinks;

checking the tightening of the bolts of the device covers;

checking the gap width on explosion-proof surfaces (bolts of the device covers must be tightened to failure, the door of the equipment compartment 2 must be closed by a clamping mechanism, after which the width of the gap between the door of the equipment compartment 2 and the explosion-proof housing 1 must be measured with a measuring probe (no more than 0.5 mm);

checking the quality of cable sealing in cable glands 12 (the bolts on the cable gland flange must be tightened to failure, the cable gland clamps 40 must be securely fastened by tightening the fixing bolts);

grounding check (nuts on grounding clamps 16 must be screwed up to failure);

checking anti-corrosion coatings (checking the presence of an anti-corrosion coating on explosion-proof surfaces, if necessary, applying a thin layer of CIATIM-221 lubricant, or its equivalent).

The proposed device is equipped with a diagnostic system for analyzing and maintaining a non-volatile state memory according to the degree of wear of rechargeable explosion-proof batteries.

Portable explosion-proof battery 35 in the preferred embodiment contains 6 sections of 10 batteries connected so that if any section fails, the battery continues to function.

Such advantages of the utility model as a high degree of explosion protection and high strength of the nodes ensure safe operation in the most difficult conditions.

The inventive device allows to increase the volume and speed of safe installation work by ensuring the uninterrupted operation of power tools in conditions hazardous to gas and dust.

Claims (7)

1. An explosion-proof charging device, including an explosion-proof housing, configured to be placed in it for charging an explosion-proof battery and equipped with a cable for connecting it, characterized in that the cable for connecting an explosion-proof battery is equipped with a connecting node, configured to create an explosion-proof connection with the return part of the explosion-proof battery connector. 2. An explosion-proof charger according to claim 1, characterized in that it is equipped with an encoder controller that generates a signal recognized by the identifier controller introduced into the explosion-proof battery circuit. 3. Explosion-proof charger according to claim 1 or 2, characterized in that the connector of the cable for connecting an explosion-proof battery is equipped with a union nut. 4. Explosion-proof charger according to paragraphs. 1-3, characterized in that the explosion-proof housing is made cylindrical with an end door and is equipped with an electromechanical lock that excludes the possibility of turning on the device with the door open and an unconnected explosion-proof battery. 5. Explosion-proof charger according to paragraphs. 1-4, characterized in that it is equipped with a transformer capable of being powered from 127 V, 220 V, 660 V and 1140 V networks, as well as a hardware unit that includes a switching power supply and a control board. 6. Explosion-proof charger according to paragraphs. 1-5, characterized in that it is equipped with cable glands equipped with rubber rings and made with the possibility of connecting a network cable of various diameters to them. 7. Explosion-proof charger according to paragraphs. 1-6, characterized in that it is equipped with an electronic control circuit configured to limit the peak voltage and maximum charge current during charging of the explosion-proof battery.

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