WO2017103815A1

WO2017103815A1 - Set of devices with at least one trolley for operation in explosive environment

Info

Publication number: WO2017103815A1
Application number: PCT/IB2016/057621
Authority: WO
Inventors: Dušan MAJERSKÝ; Vladimír HRIVNÁK
Original assignee: Adroc Tech S.R.O.
Priority date: 2015-12-15
Filing date: 2016-12-14
Publication date: 2017-06-22
Also published as: SK288788B6; DK3389882T3; SG11201804987RA; EP3389882B1; EP3389882B8; SG10202005396RA; ES2915552T3; PL3389882T3; EP3389882A1; SK500842015A3

Abstract

System comprising a remotely and/or automatically controlled trolley (200) and a control panel (4). The trolley (200) is connected with the control panel (4) by wiring; the control panel (4) is placed in a portable, sealed cabin (100) which is designed for the stay of the personnel, for placement to the dangerous explosion zone; it creates a safe space in its inside, whereby clean air is pushed inside by ventilation. The cabin (100) has a room (5) with the control panel (4); preferably it has an ante-room (6) and a machine room (7). A chimney (8) for suction of the clean air reaches a height above the level of the dangerous zone, and sucks the clean air achieving a transfer of the safe zone into the cabin (100), whereby cabin itself (100) is placed in the vicinity of the trolley (200) in the explosive zone.

Description

SET OF DEVICES WITH AT LEAST ONE TROLLEY FOR OPERATION IN EXPLOSIVE ENVIRONMENT

Field of technology

The invention concerns a system which includes multiple devices with one or multiple manually and/or automatically remote controlled trolleys operating in the explosive environment, for example inside the tank for the petroleum products or other flammable or explosive substances. The set has elements which ensure comfortable and safe control of the trolley even in cases where there are no safe zones at the place or within the proximity of the place of trolley's deployment which would have been suitable for the position of the propulsion and controls.

Prior state of the art

Remote or automatically controlled trolleys which are moving in the explosive environment, where the presence and action of a man would be dangerous and where the wearing of the necessary personal protective means leads to laborious realization of the service and operation, are known in the state of the art. All trolleys intended for explosive environment should correspond to respective standards in order to prevent the creation of sparks, overheating and so on. In places with continuous presence of the explosive atmosphere - for example, including hydrocarbon gases - such as containers or tanks for petroleum products, the standard ATEX (Regulation EU 94/9 ES) defines Zone 0; in its closer vicinity it is then Zone 1 and Zone 2.

Publication according to US5561883 discloses a remote controlled belt trolley which moves inside the tank for the petroleum substances and cleans the bottom of the tank, whereby it is controlled from the place in the vicinity of the tank. However, even in vicinity there is a risk of the explosion and the control elements and the energy supply of the remote controlled trolley in this zone can cause explosion and damage to health of the personnel, as well as other environmental damage.

Documents according to publications WO9738804 (A1 ), JPH09151912 (A),

CN201077080 (Y) disclose a construction of the remote controlled and propelled trolley, but the do not tackle the issue of the safety of its control from the close vicinity. Solution according to US4817653 (A) presupposes deployment of the people directly inc irlci thtci tanl /ht ir*ht io

evFfeir*+i\/ei Solution according to WO2012150541 (A2) discloses a trolley which is connected with the central unit of the propulsion and control by means of hydraulic and pneumatic distributions, which significantly increases the safety and shortens the reaction time of the control. If the trolley is to be controlled from the safe place where there normally is not an explosive gas atmosphere, then the control and propulsion of the trolley must be placed at greater distance from the edges of the tank; in distance on order of tens or hundreds of meters. This prolongs the control routes and it significantly impedes the operation of the trolley. If there are multiple tanks in the given locality, they are usually placed one next to each other in such a way that there is no usable safe space between them without the risk of explosion. Even when the trolleys known in the prior state of the art are used in the most explosive zone, the control and personnel of the trolleys remains exposed to risk in an environment where the control and power supply of the trolley is located.

Such system is therefore needed and not known, which would allow safe and comfortable control of the remotely and/or automatically controlled trolley in the explosive environment, whereby the personnel as well as the industrial zone in the vicinity are not at risk.

Essence of the invention

The abovementioned deficiencies are significantly remedied by a set of devices including at least one trolley for the operation in the explosive environment, whereby the trolley is propelled by the pressure medium from the separate source, which is connected to the wiring, and where the trolley is remotely manually and/or automatically controlled by the personnel by means of a control panel, which is independent and distanced from the trolley, whereby the trolley is adjusted for the operation in the explosive environment according to this invention, which essence lies in the fact that the control panel is placed in the cabin (booth) which is adjusted for the presence of the personnel; the cabin has a door for entering and leaving of the personnel,; the cabin is sealed against the outside gases and it has a ventilation to secure clean, non-explosive air inside the cabin. The cabin is portable and it is designed from outside to be adjusted and placed into the explosive environment. The cabin is ventilated by the clean air which origins in a zone without the dangerous explosive gases. Usually the cabin will be placed in the vicinity of the place of operation of the trolley; in the zone which is for example a one step safer than the zone where the trolley itself operates. The trolley will usually be designed for a zone that is one step more dangerous than the cabin. For example, the trolley can work in the Zone 0, 1 and 2 - that is, in any environment - and the cabin for such trolley will be construed for Zones 1 and 2, which results in the various combinations of the zones allowed for trolley and the cabin, respectively. The adjustment of the cabin for the placement to the explosive environment requires meeting of the respective standards or their combination, respectively, whereby the standards define various measures for prevention of the appearance of sparks, for the prevention of dangerous temperature and so on. The cabin is thus produced in such a way that it cannot cause an explosion by its interaction with the environment.

The significant feature of the proposed invention is the use of a closed, portable, ventilated cabin which in its inside creates a space for the operation of the personnel and for the stay of at least one person who does not have to wear personal protective devices inside the cabin. The term "cabin" denotes any box, spatial construction, which creates a necessary inside space separated by the walls from the outside environment. The cabin can have various constructions of walls, it can be a collapsible construction which is composed to the desired shape at the place of its use, or it can be a stable body. The inner space for the operation of the personnel needs to have dimensions which are sufficient for the stay of the given number of persons, that is, at least for one person. The minimal dimensions of the interior can be set by the sanitary regulations. The construction of the cabin has material, functional and safety characteristics which are sufficient to ensure the operation of the personnel. Simply said, the system is formed by a set of a trolley and a cabin. The trolley can have various construction and realization according to the prior state of the art; the connection of the trolley with the pressurized, ventilated cabin offers the set of the devices according to this invention new and decisive advantages.

The set of devices according to this invention produces a system which includes one or multiple remotely controlled trolleys for the work in the explosive environment and it includes portable pressurized house (cabinet, cabin) for the placement of the electric and electromechanic devices which are necessary for the control and power supply of the remote controlled trolley or multiple trolleys, respectively. The "set" in this document denotes a system, connection of the cooperating devices and elements. It will be preferable if the construction of the container is used for the creation of a cabin, which achieves excellent transport characteristics of the system. In the preferable arrangement the container will have outer dimensions, shape and parameters corresponding to the transport ISO of the cargo container in the dimension line from 1 DX to 1 AAA. In such case the cabin with the outer shape of the container has attaching elements according to the respective ISO standard, too, which allows it to transfer by the container carriers on the road, rail or by air more simply. The cabin in the standardized realization of the container allows simple stacking and storing of the set. The cabin should be sealed and sufficiently gas-proof, so that the undesirable gases do not permeate the cabin from the outside; total pressure tightness of the cabin is usually not achievable, but the permeation of the gases from the outside can be without any problems prevented by the ventilation which is set as pressurized with the air - without the explosive gases - being supplied from the zone with the clear air and without dangerous explosive gases. A particular overpressure of the clear air, relative to the outside environment, is maintained inside the cabin, thanks to which the gas leaks only outside in case of leak; that is, only clear air leaks to the vicinity of the cabin. Pursuant to this the gas-tightness shall be understood as gas-tightness which is not absolute, but which is sufficient to maintain the necessary overpressure - for example at least 20 - 25 kPa - during the change of the air inside the cabin. Usually, the loss of the clear air through the leaks in the cabin (like door, etc.) will not surpass the preset share of the volume of the clear air supplied to the cabin.

For the simple change of the clean air the cabin will have respective ventilation elements, for example outlet elements, openings with the one-way valves or membranes which are set in such a way that both the desired overpressure of the clear air and its change is achieved. Each separated part of the cabin can have at least one outlet opening, for example one valve on the outer circumference of the cabin. The outlet element (valve, membrane, semi-permeable element and so on) resists the air escaping from the cabin in a preset way and it also prevents the transfer of the gases from the outside environment even in case of the decrease in the overpressure - for example if the ventilation fails. The valves are opened by the overpressure of the inner air. The valves can have a position sensor which can be part of the inner control system with the pressure sensor inside the cabin. In order to achieve separation of the inner space with the control panel from the outside space of the cabin during the opening of the door, it will be preferable if the cabin has - apart from the room with the control panel - an ante-room with the door. The cabin is then entered in such a way that the first, outer door to the ante- room is opened first, whereby the closing of the second door between the ante-room and the room with the control panel is ensured. The first door is closed and clean air is pressed into the ante-room with both door closed. After the air is changed in the ante-room, the second door is opened and the personnel can enter the room with the control panel. In the room with the control panel the ventilation is set in such a way that the change of the clean air is achieved in a cycle according to respective sanitary regulation for the particular number of the people in personnel.

The term "clean air" has to be understood broadly as denoting any breathable air. The fact that the air is termed "clean" cannot be interpreted as claim to ecological cleanness of the air; it is air which does not originate in the dangerous zone with the explosive gases. This means that it can be a relatively polluted air which does not contain explosive gases from the dangerous zones.

Clean air can be ensured from various sources. It can be supplied from the source of the pressed air in the vessels which is, however, logistically difficult. It is preferable if a hose is used for intake of the clean air, whereby the suction mouth of the hose leads to the entirely safe zone, for example outside the area with the containers with the petroleum substances. The source of the clean air without the explosive gases can have a form of the horizontal, vertical or combined pipeline which leads to the safe space without explosive gases. The solution with the horizontal pipeline requires sufficiently long pipeline, which also requires high performance of the ventilator. Long pipeline requires meeting other sanitary demands; the air can overheat in the long pipeline under the influence of solar radiation, it can be biologically contaminated, and so on. The clean air will be at least mechanically filtered before being blown to the cabin. In a preferable arrangement the clean are can be filtered, washed or variously cleaned, it can be dehumidified or humidified, heated or cooled pursuant to the local conditions of deployment.

A solution proved to be especially preferable where the set of the devices involves vertically oriented pipes - basically a chimney - which leads above and outside of the dangerous zone. The dimensional limits of the dangerous zones have different parameters in the vertical and horizontal direction, which is relate to the physical feature of the dangerous gases from the hydrocarbons group. These gases have a tendency to spill in the available space, which means that in the horizontal direction they take vast space, but in vertical direction their concentration quickly diminishes. The chimney to secure the clean air therefore does not have to reach tens of meters as is usually needed in cases of vertical suction of the clean air. In cases of existing tanks for petroleum products it is sufficient of the chimney is, for example, 6 meters high; in such height the air no longer contains explosive gases. The chimney can in active position be placed on the roof of the cabin, which itself is more than two meters above the ground. In order to achieve simple construction, the chimney can be placed on the roof in the place of the intake of the air to the ventilation of the cabin. The chimney can be placed on the edge of the roof, within the frame of the roof or in the middle of the roof, too. The chimney can be equipped by the lightning conductor.

The chimney can be composed of multiple parts, for example from two parts, which are in the transport position placed on the roof of the cabin, for example from two parts which are in the portable position placed on the roof of the cabin or container, respectively, or inside the cabin. The lower part of the chimney can be connected to the edge of the cabin or container, respectively, by the hinge. After the attachment and sealing of the second part of the chimney the whole chimney is erected to the vertical position, whereby the lower part of the chimney, whereby the lower part of the chimney leans by its cross-section to the suction opening of the ventilation. In this part there can be a sensor of dangerous gases, which signals the eventual failure of the system, leakage, and so on.

The cabin can have a single room - that is, the room where there is a control panel; usually a control panel includes controls and display monitors. The cabin can have an ante-room, and aside from ante-room and the room with the control panel it can also include other spaces; for example, a technical space with the propulsion aggregate of the trolley and so on. The set can also include multiple containers. For example, one container will have ante-room, room with the control panel and the respective ventilation device, and the second container will contain machine room with the aggregates for the propulsion of the trolley. Each can come in different construction version. For example, in one case the machine room can be part of the pressurized part of the cabin with the clean air, thanks to which the components, elements and devices which do not meet the criteria for operation in the explosive environment can be used in the machine room. In another case the machine room will be placed in the container, but in a part of the container which is not gas-proofly separated from the outside environment, this all in order to decrease the requirements on the ventilation; in such case, only components, elements and devices which meet the criteria for operation in the explosive environment will be used in the machine room.

In order to simplify the manipulation with the trolley during its discharge from the container, the container can be equipped by discharging skids on which the trolley is placed in the transport position. The trolley can be placed on the skids directly or by means of a pad or a pallet, respectively. After the discharge of the skids with the trolley, the trolley can be put down by means of the forklift or pallet stacker or low lifter, or it can be put down manually or by the winch which will be attached on an arm rotationally deposited n the construction of the container. These handling aids allow to better use the space in the given part of the container, since they allow placing the elements to the available space more tightly and they also simplify the manipulation with the trolley. In order to achieve same goal the container can have a cable reel for reeling and storing of the cable bundle of the wiring which supplies the trolley by power and controls it.

According to the invention we can build the set of the devices in various combinations according to the particular needs. The basic arrangement involves a cabin with the control panel. The common body of the cabin can involve a machine room in the pressurized regime, too. In another solution the machine room can be placed in the independent pressurized cabin, which is connected to the cabin with the control panel by means of the respective cables and wiring. All mentioned arrangements can be supplied by the fact that the body of the cabin with the machine room has a carrier of the trolley, usually in the form of a box, or in a form of an end of the container with the door where the trolley and the respective wiring connecting the trolley with the machine room is placed during its transport to the new place of action. When controlling multiple trolleys from a single room the aggregates and controlling elements can be placed in the common machine room or they can be produced for independent machine rooms, for example in the independent containers.

The primary function of the cabin is to produce entirely safe environment for the service by the control panel, that is, mainly for control, eventually programming of the movement and operation of the trolley, and for the monitoring of the displays displaying various parameters of the system and also displaying the outputs from the cameras of the system. The cabin also protects the personnel from the common meteorological conditions. Pursuant to the place of the deployment the cabin can have a filtration of the air, air conditioning and/or heating, which produces an appropriate and comfortable working (and sanitary) space for the personnel. It is preferable if the cabin and its elements are dimensioned for the eight-hour stay of the personnel. The cabin does not have to be adjusted for the continuous (for example, a year-long) stay of the personnel, since it is expected that the system is moved after the work is finished. The cabin protects the personnel from the rain, wind and so one. The personnel have comfortable, safe and appropriate conditions for the service of the control panel in the cabin. The cabin is sufficiently lit and it can have a window, too. The personnel in the cabin can sit and it can also relax and so on. This brings about not only increase of safety for the personnel and the environment, but also an increase in the comfort of the work.

If the machine room is part of the pressurized part of the cabin or container, respectively, all machines and devices in the machine room will be in the safe space and it is not necessary to construe these machines and devices for the operation in the explosive environment. This markedly simplifies the design and construction of the system and it lowers the costs. Including ventilated cabin in the set with the trolley thereby brings about important synergetic advantages. Other elements such as power supply and/or control and/or evaluation of the devices present in the explosive environment outside the cabin - that is, elements not concerning the trolley directly, such as stable cameras monitoring the environment with the trolley - can be advantageously present in the pressurized machine room.

In order to achieve automatized protection of the safety of the environment in the cabin, the cabin will have a control system which includes at least one sensor of the overpressure in the cabin and the sensor of the opening of the door to the cabin. The set of devices in the preferable arrangement includes clean air pressure sensors in each separated part of the cabin - for example, one in the ante-room, one in the control panel room, one in the machine room. The ventilation has a sucked air temperature sensor and it can also have an analyzer of the explosive gases in the suction pipeline; preferably, it has an air-flow sensor, too. The door has sensors of the opening and they can have a lock, too, which blocks the opening of one door if the second door is closed. Such locks will be equipped by the safety switch so that the door can be opened at once in case of the emergency. Such control system can be controlled by its own control unit, or it can be controlled by the computer which controls the control of the trolley, too.

The significant advantage of the proposed invention is the possibility to place the control panel in the vicinity of the deployment of the trolley without the need for long wiring. The control panel can be localized, for example, just by the cleaned tank even in the case that there are other tanks with their own dangerous zones in the vicinity. The system with the set with the trolley can be used without regard to the character of the propulsion of the trolley. The trolley can be, for example, hydraulically propelled by means of pressure hoses which connect the trolley with the aggregate in the container. The control panel can have a character of the electronic control panel with the controls and displays where the position of the trolley and the image from the camera on the trolley is shown. The set of devices according to this invention can be used with any remotely controlled and/or automatically controlled trolley where the control panel is serviced by humans.

Brief description of drawings

Invention is further disclosed by drawings 1 to 6. The used scale and ratio between the sizes of the walls of the displayed cabin or container, respectively, or between the trolley and the tanks as well as between all other parts of the system or set of devices are not binding; they are informative or they were directly adjusted in order to increase clarity.

Figure 1 is a view of the system with one container and one trolley placed inside the tank for the petroleum products. Inscriptions Z 0, Z 1 , Z 2 depict zones 0 to 2 according to the risk of explosion pursuant to ATEX standard. In the vicinity of the entrance to the tank there is Zone 0. Zone CA represents a zone with the clean air.

Figure 2 is a ground plan of the areal with six circular tanks, where the individual zones of danger of explosion on the terrain level are depicted by different hatching. Zone 0 is by the open tank and also in the vicinity of the opening.

Figure 3 depicts an example of the separation of the cabin to individual parts. The door to the room as well as ante-room is schematically displayed as open, even though in the active state these will not be simultaneously open. The door to the back part of the container, where the storage space for the trolley and its wiring has been produced, are depicted as open even during the operation of the system. Figure 4 depicts a container with the chimney in the portable position; figure 5 depicts the chimney in the active position where it sucks the clean air from the safe zone.

Figure 6 depicts two containers connected by the cables, where one container is designed for the stay of the personnel, and the second is designer for the placement of the machine room.

Examples of realization Example 1

The set according to this example on figures 1 to 5 is designed to remove the sediments and/or sludge in the reservoirs in explosive environment in Zone 0. Hydraulically propelled trolley 200 is placed in the reservoir during the operation and it is connected with the control panel 4 and with the hydraulic aggregate by means of the wiring 3. The trolley 200 is produced in such a way that it meets all standards for the operation in the explosive environment - it has spark-less moving components, it has protection against overheating and so on. In the immediate vicinity of the reservoir there is Zone 1 . There is a terrain wall around the reservoir, which should prevent the spilling of substances to the wider surroundings in case of a leak. The reservoir is localized in a group of multiple reservoirs.

The cabin 100 in this example has an outer shape of a 20-feet 1 CC ISO container. The container is divided to four basic parts on its ground plan. The first one is an ante-room 6 which has its first door outside, on the front of the container. The second door from the ante-room 6 leads to a room 5 with a control panel 4. The ante- room's 6 function is to divide the room 5 with the control panel 4 from the outside environment. The control panel 4 has controls for the manual control of the movements of the trolley 200; it also has input interface for the programming or entering of the parameters of the operation of the trolley 200, respectively; it has displays to display the position and parameters of the trolley 200 and to display the image from the cameras.

In the room 5 there is a control panel 4 with the controls and display. Clean air is changed in the room 5 by the ventilation, whereby the number of changes of the air in the room 5 per hour can be set pursuant to the number of people in the room 5. The ventilation is set in such a way that the overpressure in the room 5 relative to the outside air pressure is in this example 30 kPa.

The cabin 100 has a collapsible chimney 8 which is in the active position erected from two pipes, where each is two meters long. After the erection the mouth of the chimney 8 reaches a height of approximately 6,5 m, where the zone is CA - there is a clean air even in the case where the cabin 100 is placed in the Zone 1 in the immediate vicinity of the reservoir. Clean air is sucked through the chimney 8 and pushed to the room 5. There is a sufficient height of the ceiling in the room 5 for walking; there are also chairs for the personnel as well as basic working equipment. The personnel control the movement of the trolley 200 either in the fully manual regime or in semi-automatic regime. The image from the cameras in the trolley 200 is transmitted to the room 5.

The third part of the cabin 100 is a machine room 7 which is in this example pressurized by the clean air in the same way as the room 5. In the machine room 7 there is a hydraulic pressure source, an electric switchboard, a set of electromagnetically controlled valves and other components of the device for the cleaning of the bottom of the reservoir. Between the room 5 and the machine room 7 there is a wall with the door; the wall diminishes the transfer of the noise from the aggregates to the room 5 with the personnel.

The fourth part of the container in this example is a carrier of the trolley 200 in the transport (portable) position. This part is not ventilated by the clean air and the trolley 200 with the wiring 3 is placed in it after its work is finished. The whole set is in the portable position contained in a single container which can be transported by any container carrier; it can be stored and stacked.

The trolley 200 is produced in such a way that it meets the criteria for operation in Zones 0, 1 , 2. The cabin 100 meets the criteria for the operation in the Zone 1 , 2. The set of devices is therefore capable to operate in various combinations such as: trolley 200 cabin 100

Zone 0 Zone 1

Zone 0 Zone 2

Zone 1 Zone 1

Zone 1 Zone 2

Zone 2 Zone 2 CA (clean air) CA (clean

Example 2

Set of devices according to this example from the figure 6 has two containers, whereby the first one has an ante-room 6 and the room 5 with the control panel 4 and the other one is formed by the carrier of the machine room 7. Both containers are connected by the cables after their transport and assemblage. Separation of the room 5 from the machine room 7 lowers the amount of noise and vibrations in the room 5. Example 3

Set of devices in this example has a cabin 100 which is part of the semi-trailer of the off-road utility vehicle.

Example 4

Set of devices in this example has a cabin 100 mounted on the truck with the mechanical arm. The cabin 100 is demounted to the vicinity of the tank by means of the mechanical arm.

Example 5

Set of devices includes a cabin 100 which is dimensioned for the stay of two to four people from the personnel. In the room 5 there are control panels 4 for two independent trolleys 200. The wirings 3 for two trolleys 200 run out of the machine room 7. The advantage of the system hereby manifests itself in that the devices in the machine room 7 do not need to have technical measures for the operation in the dangerous zones; they do not have to have voluminous boxes, seals with the complex transits, etc. They work in the safe environment. Thanks to this they do not occupy large space and there are no problems with cooling. The machine room 7 also offers useful space for the service and maintenance; individual aggregates are visible, no confined to the boxes. The space of the machine room 7 can be cooled by the air in the same way the room 5 is; it can be also dehumidified or heated.

Industrial applicability

Industrial applicability is obvious. According to this invention it is possible to repeatedly produced and use sets of devices with the trolley for the operation in the explosive environment, for example for the removal of the sediments and/or sludge in the reservoirs, tanks, lagoons with the explosive environment, in an environment of the chemical industries processing petroleum or petroleum products, whereby the control panel can be safely and comfortably placed within the vicinity of the trolley which operates in the zone with the highest risk of explosion.

List of related symbols

100 - cabin

200 - trolley

3- wiring

4- control panel

5- room with control panel

6- ante-room

7- machine room

8- chimney

Z0 - ZONE 0 - a space with the continuous presence of the explosive gas atmosphere;

Z1 - ZONE 1 - a space where explosive gas atmosphere can be produced during normal operation;

Z2 - ZONE 2 - a space where the creation of explosive gas atmosphere is improbable during normal operation; a space where the appearance of the explosive gas atmosphere composed of the mixture of the flammable substances in the form of a gas, steam or fog with the air is improbable in the normal operation and if it appears, it lasts only for a short time;

CA - clean air; space without the danger of the appearance of the explosive gas atmosphere during normal operation; space outside the zones with the risk of explosion.

UTI - intermodal transport unit

Claims

PAT E N T C LAI M S

A set of devices including at least one trolley for an operation in an explosive environment, where the trolley (200) is propelled by a pressure medium from a separate source, whereby it is connected with the source by a wiring (3), and where the trolley (200) is remotely controlled by personnel by means of a control panel (4) outside the trolley (200),

whereby the trolley (200) is adjusted for the operation in the explosive environment,

and the control panel (4) is connected with the source of the pressure medium supplying the trolley (200) with a power,

is characterized by the fact, that

the control panel (4) is placed in a cabin (100) which is designed for a stay of the personnel,

the cabin (100) has door for an entrance and an exist of the personnel,

the cabin (100) is sealed against an entrance of an outside gases and it has a ventilation to secure an intake of a clean air into the cabin (100), whereby the clean air is blown into the cabin (100) in order to secure a change of the air in the cabin (100) while a sufficient pressure relative to the outside environment is maintained in the cabin (100),

whereby the cabin (100) is portable and it is designed from an outside for a placement to the explosive environment.

The set of the devices including at least one trolley for the operation in the explosive environment according to the claim l is characterized by the fact, that the trolley (200) is designed for the operation in the explosive environment in Zone 0 and/or Zone 1 and/or Zone 2 according to ATEX standard and the cabin (100) is designed for the placement to the explosive environment in Zone 1 and/or Zone 2 according to ATEX standard.

The set of the devices including at least one trolley for the operation in the explosive environment according to the claim 1 or 2 is characterized by the fact, that in the cabin (100) with an overpressure of the clean air there are elements for a control and/or an assessment of the devices in the explosive environment outside the cabin (100) and/or supply of such devices with power.

The set of the devices including at least one trolley for the operation in the explosive environment according to any of the claims 1 to 3 i s characterized by the fact, that the cabin (100) has an outer shape, dimensions and connecting elements according to a standard for cargo containers, preferably ranging from 1 D to 1 AAA according to ISO standard.

The set of the devices including at least one trolley for the operation in the explosive environment according to any of the claims 1 to 4 i s characterized by the fact, that the cabin (100) has controlled pressurized ventilation in order to achieve the overpressure of the clean air inside the cabin (100) relative to the air in its surroundings; preferably the overpressure is at least 20 KPa, especially preferably it is at least 25 kPa.

The set of the devices including at least one trolley for the operation in the explosive environment according to any of the claims 1 to 5 i s characterized by the fact, that the ventilation is adjusted for multifold change of a volume of the air per hour in the cabin (100); preferably the air is changed fifteen times per hour.

The set of the devices including at least one trolley for the operation in the explosive environment according to the claim 6 i s characterized by the fact, that the cabin (100) or any separate part of the cabin (100) has an intake of the clean air and that it has an outlet opening on an outer cover of the cabin (100) for a regulated exit of the air; preferably the outlet opening has at least one one-way valve which is opened after the desired overpressure of the clean air inside the cabin (100) or its separate part is achieved.

The set of the devices including at least one trolley for the operation in the explosive environment according to any of the claims 1 to 7 i s characterized by the fact, that the cabin (100) has an ante-room (6) and a room (5) with the control panel (4), whereby the ante-room (6) has outer door on the cover of the cabin (100) and the cabin (100) has door leading from the ante-room (6) to the room (5).

9. The set of the devices including at least one trolley for the operation in the explosive environment according to any of the claims 1 to 8 i s characterized by the fact, that the cabin (100) has a machine room (7) with aggregates for the propulsion and control of the trolley (200), preferably the machine room (7) contains the source of the pressure medium for the trolley (200), too.

10. The set of the devices including at least one trolley for the operation in the explosive environment according to the claim 9 i s characterized by the fact, that in the machine room (7) there are the elements for power supply and/or control and/or assessment of the devices present in the explosive environment outside the cabin (100).

11. The set of the devices including at least one trolley for the operation in the explosive environment according to the claim 9 or 10 is characterized by the fact, that the machine room (7) is pressurized by the clean air, preferably by means of the ventilation, which also pressurizes the room (5), too.

12. The set of the devices including at least one trolley for the operation in the explosive environment according to any of the claims 9 to 11 is characterized by the fact, that it involves multiple containers which are mutually connected by cables, whereby at least one container includes the room (5) with the control panel (4) and at least one other container includes the machine room (7).

13. The set of the devices including at least one trolley for the operation in the explosive environment according to any of the claims 1 to 12 is characterized by the fact, that the clean air is sucked into the cabin (100) by means of a pipeline whose mouth is placed in a safe zone without explosive gases.

14. The set of the devices including at least one trolley for the operation in the explosive environment according to any of the claims 1 to 13 i s ch aracterized by the f act, that it has a chimney (8) whose mouth is in a working position reaching a height of the safe zone without the explosive gases, whereby the chimney (8) is connected to the suction of the ventilation.

15. The set of the devices including at least one trolley for the operation in the explosive environment according to the claim 14 i s cha racte rized by the fact , that the chimney (8) is attached to a roof of the cabin (100), preferably the chimney (8) is collapsible and composed of multiple parts.

16. The set of the devices including at least one trolley for the operation in the explosive environment according to any of the claims 1 to 15 i s ch aracte rized by th e f act, that the ventilation has a filtration and/or an air conditioning and/or an air heating and/or dehumidification of the air and/or humidification of the air.

17. The set of the devices including at least one trolley for the operation in the explosive environment according to any of the claims 1 to 16 i s cha racte rized by th e f act, that the cabin (100) has automatized control of the ventilation; that it has a sensor of a position of the door and a sensor of the overpressure of the clean air inside the cabin (100); preferably it has a sensor of an air-flow in the ventilation. 18. The set of the devices including at least one trolley for the operation in the explosive environment according to any of the claims 1 to 17 i s cha racte rized by the f act, that it has a non-pressurized carrier of the trolley (200) for storage and/or transport of the trolley (200) when it is not in operation.

19. The set of the devices including at least one trolley for the operation in the explosive environment according to the claim 18 i s cha racte rized by the fact , that the carrier of the trolley (200) is produced in the back side of the container with a front door, preferably the carrier of the trolley (200) neighbors with the machine room (7).

20. The set of the devices including at least one trolley for the operation in the explosive environment according to any of the claims 1 to 19 is characterized by the fact, that the carrier of the trolley (200) has discharge skids, whereby the trolley (200) is in a closed position during transport of the cabin (100) placed on the discharge skids, and in a discharged position the skids protrude from a groundplan of the carrier; preferably the carrier has a lifting mean for a manipulation with the trolley (200n. 21. The set of the devices including at least one trolley for the operation in the explosive environment according to any of the claims 1 to 20 i s characterized by the fact, that the carrier (200) has a cable reel for reeling of the wiring (3) in the transport position of the cabin (100).