CN203076304U

CN203076304U - Ventilation arm and ventilation system

Info

Publication number: CN203076304U
Application number: CN201220590737XU
Authority: CN
Inventors: 拉尔斯·赫德隆
Original assignee: Fumex AB
Current assignee: Fumex AB
Priority date: 2012-11-09
Filing date: 2012-11-09
Publication date: 2013-07-24
Anticipated expiration: 2022-11-09

Abstract

The utility model relates to a ventilation arm and a ventilation system. The ventilation arm comprises pipe components. At least one first pipe component and one second pipe component are cooperated so as to form a telescopic pipe component. A displacement apparatus is arranged between the first pipe component and the second pipe component. The ventilation arm also comprises at least one connection structure which is used between the pipe components so as to mutually connect the pipe components. And the two pipe components can rotate relatively to each other. Each connection structure comprises a first connection half portion, a second connection half portion and an apparatus which maintains the connection half portions together and then maintains the connection structures together, wherein the first connection half portion and the second connection half portion are the same essentially. Free end portions of the connection half portions are in a circular shape and can rotate about a common axis (X) relatively to each other. The displacement apparatus arranged between the first pipe component and the second pipe component comprises a first slide apparatus arranged between the first pipe component and the second pipe component.

Description

Ventilating arm and ventilating system

Technical field

The utility model relates to ventilating arm, and its free end that can improve arm, arm is at pollution sources or want to keep the positional precision of the location of ventilating, and also relates to ventilating system.

Background technology

Dissimilar ventilating systems is used to different spaces to ventilate, and sends away undesired air bearing particle, gas, material, pollutant and may appear at the airborne other materials of dissimilar working environments.An example is to be used for breadboard ventilating system type in the course of work of assembly working or other types.The simple description of such ventilating system is that it comprises air extractor and air delivery device.Air delivery device generally includes gas distribution channel, and this gas distribution channel has the unit and at the opening at its second end place of bleeding at one end place, and this opening generally includes pick-up mouth.Pick-up mouth is arranged on the pollution sources place or in the location of wanting to keep avoiding pollutant, and the unit of bleeding produces negative pressure at opening part, thereby makes air and undesired gas or the material that exists, and perhaps gas and material both are drawn in the gas distribution channel.

Such ventilating system generally includes ventilating arm, and it constitutes the part of gas distribution channel, and this part maybe needs to avoid the zone of pollutant near pollution sources.Ventilating arm comprises interconnected like this assembly successively, make that they can be crooked, and their position relations each other can be regulated, thereby the feasible pick-up mouth that is arranged on the outermost free end of ventilating arm can be arranged in the interesting areas, wherein has pollutant or wants to make it not have pollutant.The rear portion of ventilating arm is connected to gas distribution channel, and air transports by it.

Become possibility in order make to move described arm and to lock it in place, described arm comprises multi-form setting, and it can and remove start by start, thereby influence, guiding, adjusts and the motion of locking ventilating arm.It is not too accurate to have the positional precision that to connect several assemblies be pick-up mouth with a problem forming the arm configuration that needs motion.When several sub-elements and joint need be affected and work as the arm component that makes up when having at least two freedoms of motion at each joint design place, arm towards or the accurate motion of leaving interesting areas be difficult.

The utility model content

A purpose of the present utility model is to provide ventilating arm, and it can improve the gas distribution channel opening and enter or leave the positional precision that pollution sources maybe need to keep to ventilate and avoid the zone of pollutant.

The ventilating arm of the characteristic characteristic specified of this purpose by having following technical scheme: ventilating arm, comprise: tube elements, it comprises at least one first tube elements and one second tube elements, this first tube elements has less times greater than the diameter of the diameter of second tube elements, allow second tube elements to be inserted in first tube elements, make that these two tube elements can be in the axial direction relative to each other with stretch mode displacement, motion, and be arranged on the gearshift between first tube elements and second tube elements; With at least one syndeton, it is used between two tube elements, to be connected to each other these tube elements, make it possible to relative to each other rotate this two tube elements, wherein syndeton has the interior compartment of opening, and it is connected on the interior compartment of each opening that is connected to the tube elements on the syndeton; Comprise that identical in essence first connection, half one is connected half one with second, with with the described device that is connected that half one keeps together and then syndeton is kept together, each comprises first one and second one wherein said connection half one, wherein first one makes relevant connection half one can be connected on the tube elements, wherein each connect second one of half one mutually towards and comprise the outermost free end that points to towards each other), have circular form and can relative to each other rotate around common axis line; It is characterized in that: described gearshift comprises first carriage that is arranged between first tube elements and second tube elements, comprise sliding sleeve, this sliding sleeve comprises first one, this first one remains on the first tube elements place with sliding sleeve, this sliding sleeve comprises second one, this second one contacts with second tube elements under the effect of the power that can regulate (F), and with first associating, and all parts of second one of this sliding sleeve are positioned at the front of first end of first tube elements; And described syndeton comprises second carriage between the outermost free end of half one of connection, comprise two side surfaces with the contact of relevant end surfaces, wherein at least one side surface comprises the structure that increases friction, and described friction is worked between the side surface of the end surfaces and second carriage that contacts with end surfaces.

Alternatively, described first carriage comprises the device that is used for conveying capacity (F).

And, realize according to the described ventilating system of following technical scheme: this ventilating system, comprise according to aforesaid ventilating arm and air extractor, this air extractor produces negative pressure in ventilating arm, the pollutant of the particle of dissimilar undesired air bearings and material, air bearing is transported away from the localized area (Z) in the open end of described arm.

The utility model will be described in the explanation with reference to figure 1-Fig. 5 below.Parts and article are in the accompanying drawings with reference numerals.

Description of drawings

Fig. 1 represents the parts according to air delivery device of the present utility model, ventilating system.

Fig. 2 represent to be connected on two pipes according to syndeton of the present utility model.

Fig. 3 represents other views according to the details of syndeton of the present utility model.

Fig. 4 represents according to gearshift of the present utility model.

Fig. 5 represents according to gearshift of the present utility model and sliding control member.

The specific embodiment

The utility model relates to ventilating arm 1, on-the-spot air exhauster.Ventilating arm 1 comprises tube elements 2-5.At least the first tube elements 3 and 4 cooperations of second tube elements also form the telescoping tube element.First tube elements 3 has less times greater than the diameter of second tube elements 4

Diameter

This allows second tube elements 4 to be inserted in first tube elements 3, thereby makes that two elements 3 and 4 can be with relative to each other displacement in the axial direction, motion of stretch mode.Gearshift 6 is arranged between first tube elements 3 and second tube elements 4.At least one gearshift with this structure is used for according to ventilating arm of the present utility model.

Ventilating arm 1 also comprises two

syndetons

7 and 8 that are used between two

tube elements

2 and 3,4 and 5, to interconnect these tube elements, makes it possible to relative to each other rotate in couples two tube elements.Syndeton 7 and 8 has the interior compartment 7a and the 8a of opening, and it is connected on the interior compartment 2a-5a of each opening of the tube elements 2-5 that is connected on syndeton 7 and 8.At least one syndeton with this structure will be used for according to ventilating arm of the present utility model.

Each

syndeton

7 and 8 comprises that identical in essence first is connected half one 9 and is connected half one 10 with second, and with the device 11 that keeps being connected half one 9 and 10,

syndeton

7 or 8 keeps together like this.Connect half one 9 and 10 each comprise first one 12 and 13 and

second ones

14 and 15, wherein make the possibility that is connected to become on relevant half ones 9 that are connected and 10 to the tube elements 2-5 for first one 12 and 13, wherein each connects half one 9 and 10 the second one 14 outermost

free end

16 and 17 that is connected half one 9 and 10 that faces one another and comprise mutual sensing with 15, and they place with contacting with each other.The

free end

16 and 17 that connects half one 9 and 10 has circular form, and can relative to each other rotation around common axis X.

The gearshift 6 that is arranged between first tube elements 3 and second tube elements 4 comprises first carriage 18 that is arranged between first tube elements 3 and second tube elements 4.First carriage 18 comprises sliding sleeve 18a, it comprises sliding sleeve 18a is remained on first one 18.1 of first tube elements, 3 places, with second one 18.2 that under the power F that can regulate, contacts with second tube elements 4, these second one 18.2 and first ones 18.1 associatings, and all parts of second one 18.2 of sliding sleeve 18a are positioned at the front of first end 3.1 of first tube elements 3.

Syndeton 7 and 8 comprises second carriage 19 between the outermost

free end

16 and 17 that connects half one 9 and 10, comprises two

side surfaces

20 and 21 that contact with 17a with relevant end surfaces 16a.At least one end surfaces 16a and/or 17a comprise the structure 22 that increases friction, and it acts between the end surfaces 16a and/or 17a and side surface 20 and/or 21 of second carriage 19, contacts with end surfaces 16a and/or 17a.

Have first carriage 18 and comprise the syndeton 7 of second carriage 19 and the architecture advances of 8 gearshift 6 gas distribution channel opening, ventilating arm 1 enter or leave the displacement accuracy that pollution sources maybe need to keep to ventilate and avoid the zone of pollutant.Two carriages 18 are always worked on the parts that comprise with the arm that is connected with 19, and always can work in point-device mode.By like this, whole ventilating arm 1 all parts can be easily and are provided with in the mode of safety.

Each tube elements 2-5 comprises wall elements respectively.These wall elements form the restriction of hollow center 2a-5a respectively, and they comprise first and second openends.First end 1.1 of ventilating arm 1 is arranged in the pollution sources place or is wanting to keep to ventilate and avoiding the zone of pollutant.Each tube elements 2-5 is made by the rigidity material, or is made by several synergistic rigidity materials, or makes in the mode that causes rigidity.

The gearshift 6 that comprises the carriage 18 that contains sliding sleeve 18a comprises first one 18.1, round flange, and sliding sleeve 18a is remained on first tube elements, 3 places.First one 18.1 and the associating of first tube elements 3, it is arranged on the outer surface of first end 3.1 of first tube elements 3.First one 18.1 can also be in another way and 3 associatings of first tube elements, and this is united between first one 18.1 and first tube elements 3 provides corresponding connection.

Sliding sleeve 18a also comprises second one 18.2, and it contacts with second tube elements 4 under adjustable power F.This second one 18.2 associating also is connected on first one 18.1, and its all parts that are arranged so that second one 18.2 all are positioned at the front of first end 3.1 of first tube elements 3.First one 18.1 is the ends with identical sliding sleeve 18a with second one 18.2.

The device of conveying capacity is arranged among the sliding sleeve 18a with conveying capacity F, and this power F is increased in the friction on second one 18.2 of sliding sleeve 18a, and this sliding sleeve keeps and the contacting of second tube elements 4.The device that is used for conveying capacity comprises rounded portions 23, band, and this band is followed the circular form of sliding sleeve 18a and interacted with tensioning apparatus 24.Tensioning apparatus 24 can be regulated, thereby makes it possible to increase or reduce the circumference of rounded portions, band, especially can increase or reduce sliding sleeve 18a by the power F that is pressed on second tube elements 4.Rounded portions 23, band contacts with sliding sleeve around the sliding sleeve whole circumference, thereby make on capable F is evenly distributed on around the whole sliding sleeve 18a and second tube elements 4, and the feasible power that applies is distributed, and all identical on every side in total in essence.

Rounded portions 23, band are arranged in the compartment 25 among the sliding sleeve 18a.Tensioning apparatus 24 also is arranged in the compartment 25.Sliding sleeve 18a shows space 25a bigger in the compartment 25, is enough to place tensioning apparatus 24.The determining positions of tensioning apparatus 24 in the 25a of this space the position of tensioning apparatus 24 with respect to sliding sleeve 18a because space 25a has shown the confining wall element around tensioning apparatus 24.

Sliding sleeve 18a is provided to the inlet that is arranged on than at least one tensioning apparatus 24 among the sliding sleeve 18a among the large space 25a.In sliding sleeve 18a, may have opening or flexible wall portion, make it possible to tool using or hand and reach the tensioning apparatus 24 that is arranged in than large space 25a from the outside by opening, flexible wall or some other entrance structures.

Sliding sleeve 18a is made by one or several plastic material, it has good slip attribute, elasticity and lubricated attribute, be used for sliding, be used for keeping those zones of sliding sleeve and sliding control member also to have the maintenance attribute at a tube elements upper surface.Dissimilar polyolefin, for example polyethylene (PE) and polypropylene (PP) work well, also can adopt the other materials with attribute of wanting simultaneously.

Tensioning apparatus 24 and power F regulate by part tensioning apparatus 24, it comprises the service portion of start, the position that begins at least one end of rounded portions 23 subsequently changes, thus cause with the circumference of rounded portions and it is on second tube elements or the increase of the power around it or reduce.The start of service portion can take place down the auxiliary of instrument or staff.For example, service portion can be screw or bolt, and instrument for example can be screwdriver or key or staff.

Sliding control member 26 also is arranged between first tube elements 3 and second tube elements 4.Sliding control member 26 is arranged on and is integrated with first end 4.1 of second tube elements 4, and this end is arranged in first tube elements 3 in principle.

Sliding control member 26 comprises the flange 27 of the outer surface that is arranged on second tube elements 4.Flange 27 contacts with the inner surface of first tube elements 3 at the outstanding specific range in the outside of second tube elements 4.Sliding control member 26 has the taper form, and the zone with minimum diameter that it is the narrowest is in the zone that sliding control member 26 is attached on second tube elements 4.This shape causes the flexibility in sliding control member 26 and the Design of device, and then prevents that tube elements 3 and 4 from relative to each other locking.

Sliding control member 26 is made by one or more plastic materials, it has good slip attribute, elasticity and lubricated attribute, be used to slide surface on tube elements, and be used for keeping those zones of sliding sleeve and sliding control member to have the maintenance attribute.Dissimilar polyolefin, for example polyethylene (PE) and polypropylene (PP) work well, also can adopt the other materials with attribute of wanting simultaneously.

When cross section is seen, tube elements 3 and 4 can be circular, maybe can be oval, the limit is arranged, or have other shapes, provide suitable air to flow by them, and allow relative to each other stretching motion of two tube elements 3 and 4.

According to syndeton 7 of the present utility model and 8 is that friction is connected, and when using, it is arranged between two

tube elements

2 and 3,4 and 5 and is connected on the tube elements.Each

syndeton

7 and 8 provides the interior compartment 7a and the 8a of opening, and it is the connection between

tube elements

2 and 3,4 and 5, their inside 2a-5a.

The air that need remove, carry air, the pollutant of air bearing particle and material with it, they need be from a localized area Z, be generally the operating area, be transported to second area, be generally collecting zone, may also comprise cleaning equipment, through ventilating arm 1, by

syndeton

7 and 8 and compartment 2a-5a, 7a and the 8a of tube elements 2-5.

Syndeton 7 and 8 is connected to each other these

tube elements

2 and 3,4 and 5.Syndeton 7 and 8 also has such design, makes it possible to manage 2-5 position adjustments relative to each other.

Syndeton 7 and 8 comprises that first is connected half one 9 and is connected half one 10 with second, and they are identical in essence and be connected to each other and be connected on of

pipe

2 and 3,4 and 5.Two connect half one 9 and 10 and keep together each other down the auxiliary of device 11.

Each connects the principal mode that half one 9 and 10 has the circular body that forms, and described body has inner surface, and described inner surface guides and convenient air passes through each syndeton 7 and 8.Be understandable that

syndeton

7 and 8 is made by plastic material and synthetic material, it forms in the mode that is suitable for these materials.

Two connect outside and the internal form that half one 9 and 10 forms syndeton together.The interior compartment 7a of syndeton forms and limits by relevant interior compartment 9a that is connected half one 9 and 10 and 10a with 8a.

Each connects half one 9 and 10 and comprises first one 12 and 13 and second ones 14 and 15.First one 12 and 13 each comprise first opening.Each connect half one 7 on 8 first one 12 with 13 each make the possibilities that are connected to become on relevant half ones 7 that are connected or 8 to the pipe 2-5.The end of pipe is inserted in the associated openings in each first one, and they are fixedly mounted in and connect in half one 9 and 10.

Each second one 14 and 15 comprises second opening.Connecting on half one 7 and 8 second one 14 and 15 and second opening at each rotates towards each other.Comprise the

free end

16 and 17 of outermost for second one 14 and 15, they point to towards each other.

Syndeton 7 and 8 comprises second carriage 19, sealing and carriage 19a, and it is between the

free end

16 and 17 that points to towards each other.Each outermost

free end

17 and 18 comprises

end surfaces

16a and 17a, and sealing is arranged so that with these end surfaces 16a with carriage 19a and contacts with

17a.End surfaces

16a and 17a constitute the bottom of recess, are understandable that this recess is more shallow relatively.

Outermost

free end

16 and 17,

end surfaces

16a and 17a and sealing and carriage 19a in surface, their end shape of cross-sectional area are provided, in those planes that parts point to towards each other and contact with each other, are circular and annular.This makes becomes possibility around common axis X half one 9 and 10 that relative to each other is rotatably connected, this common axis X also constitutes the axis L X of

syndeton

7 and 8, and do not cause that any change of the shape of

syndeton

7 and 8, the latter will emit the risk that causes that leakage, air leak.This is two and connects half one 9 and 10 such rotation relative to each other, and it causes each other the changes of two

pipe

2 and 3,4 and 5 positions connecting by syndeton.

Stop in order to make syndeton 1 to connect the motion that provides different between half one 9 and 10 at two, the end surfaces 16a and the 17a of outermost free section comprise such structure 22, and it increases friction and acts between

relevant end

14 and 15,

end surfaces

16a and 17a and sealing and carriage 19a.Because the termination of this motion that the structure 22 of increase friction causes means, in case influence, start, pipe motion, on of

pipe

2 or 3,4 or 5, or on half one 9 of connection or 10 one, or remove with a power that is connected in half one at a pipe, tube elements position relative to each other will be the position of wanting.As long as this is used as power big and overcomes friction, connect half one 9 and 10 and relative to each other rotate, but become when being used as power than rubbing hour, connect half one 9 and 10 become relative to each other fix on the throne.

Sealing and carriage 19a comprise two

opposite side surfaces

20 and 21, and it contacts with structure 22 with 17a with relevant end surfaces 16a, and increase rubs.The structure 22 that increases friction appears at least one end that connects half one, end surfaces place.

The structure 22 that increases friction is included in the surface plane, at

end surfaces

16a or 17a, and the perhaps inhomogeneous portion on 16a and the 17a.The structure 22, the inhomogeneous portion that increase friction are amorphous, are formed on the end surfaces at random.It can be formed among at least one end surfaces 16a and the 17a in the manufacture process of relevant connection half one 9 and 10, perhaps can constitute the unit that is provided on the end surfaces.

The structure 22, inhomogeneous that increase friction can also have such structure, and it has the form of qualification and is distributed on the end surfaces.This structure 22 that increases friction can also be formed among at least one end surfaces 16a and the 17a in the manufacture process of relevant connection half one 9 and 10, perhaps can constitute the unit that is provided on the end surfaces.

The structure 22 that increases friction can be included among at least one end surfaces 16a or the 17a or on material raise.It is rising, the ridge that extends that this material raises, and it is set to them in the radial direction with respect to the rotation X longitudinal extension of half one of connection.The rising of material, the rising of extension, ridge extend across the whole width of end surfaces.The rising of material can also comprise a rising, and it is distributed at least one

end surfaces

16a and 17a of edge part.

Connecting half one 9 and 10 keeps together under device 11 auxiliary.Device 11 acts on two and connects in half one 9 and 10 and between them.Device 11 comprises retaining element, the axial member 11.1 of extension.Axial member 11.1 has the design that is similar to bolt, and it connects in interior compartment 9a to the second connection half one 10 and its interior compartment 10a of half one 9 by opening from one by

whole syndeton

7 and 8.

Axial member 11.1 is included in head-like structure 11.2 and the fixed part 11.3 on the one end thereof, it for example is included in the external screw thread at its second end place, make that it can be with fixture 11.4, the nut type structure that for example has internal thread, be installed on axial member 11.1 and the fixed part 11.3, thereby influence the active length 11L of axial member, thereby two

connection half ones

9 and 10 under the tension force that make can contact with each other with variable power.

Head-like structure 11.2 is arranged on an outer surface that connects half one 10, or can be integrated with half one 10 that is connected or be integrated in connection half one 10.Device 11, head-like structure 11.2 can also be arranged on other outer surfaces that connect half one 9.Importantly, axial member 11.1 is by

syndeton

7 and 8, and half one 9 and 10 that will connect keeps together.

Fixture 11.4 can be nut, the knob or the analog of joint are arranged.Fixture 11.4 can also make to tighten by tightening torque becomes possibility, and described tightening torque determines in advance, for example by the predetermined length of screw thread, stop stake or analog on interaction parts.

The longitudinal axis of axial member is consistent with the axis L X of syndeton to 9X.Two connect half one 9 and 10 rotation relative to each other occur in this rotation X around, around the axis L X of syndeton, and also around the longitudinal axis IIX of axial member, because all these axles are all consistent mutually.

When from cross section, tube element 2-5 can be circular, perhaps can be oval-shaped, has the sharp corner and has other forms, provides excellent function for air flows.

Can also be included in the extraction cover at free end 1.1 places of arm 1 according to ventilating arm 1 of the present utility model.Catching of the convenient air of this extraction cover, pollutant, described air, pollutant are wanted to transport from the Z of localized area.

Be included in erecting device 28 in the arm 1 and make ventilating arm 1 is installed in the structure of some forms in the room and become possibility that when using, it will support ventilating arm 1.This structure can be support, the supporting structure of some forms, for example roof, wall, go-cart, framework or analog.

Comprise that according to ventilating system of the present utility model at least one is with respect to above-mentioned one ventilating arm 1.Ventilating system also comprises air extractor 29, it produces negative pressure in ventilating arm 1, in all carrier gas parts, produce suction force, to transport from the pollutant of the particle of the dissimilar undesired air bearing of localized area Z and material, air bearing, be transported in the device that air handled.

This description of the optional design of different embodiment of the present utility model and its article is not intended to as qualification of the present utility model: it need be understood on wide significance, in case unnecessarily limit according to the described protection domain of back claim.Change in those skilled in the art's experience scope is in the protection domain of the utility model notion.The different article designs that provide in the explanation above can freely be used and make up, as long as the function that acquisition is wanted.

Claims

1. ventilating arm (1) comprising:

Tube elements (2-5), it comprises at least one first tube elements (3) and one second tube elements (4), this first tube elements (3) has less times greater than the diameter of second tube elements (4) Diameter

Allow second tube elements (4) to be inserted in first tube elements (3), make that these two tube elements (3,4) can be in the axial direction relative to each other with stretch mode displacement, motion, and be arranged on the gearshift (6) between first tube elements (3) and second tube elements (4);

With at least one syndeton (7,8), it is used for two tube elements (2,3; 4,5), to be connected to each other these tube elements (2,3; 4,5), make it possible to relative to each other rotate this two tube elements (2,3; 4,5), wherein syndeton (7,8) has the interior compartment (7a, 8a) of opening, and it is connected on the interior compartment (2a-5a) of each opening that is connected to the tube elements (2-5) on the syndeton (7,8);

Comprise that first identical in essence connection half one (9) is connected half one (10) with second, with with described half one (9 that is connected, 10) keep together and then with syndeton (7,8) device that keeps together (11), wherein said connection half one (9,10) each comprises first one (12,13) and second one (14,15), wherein first one (12,13) feasible relevant connection half one (9,10) can be connected on the tube elements (2-5), wherein each connects half one (9,10) second one (14,15) mutually towards and comprise the outermost free end (16 that points to towards each other, 17), having circular form also can relative to each other rotate around common axis line (X); It is characterized in that:

Described gearshift (6) comprises first carriage (18) that is arranged between first tube elements (3) and second tube elements (4), comprise sliding sleeve (18a), this sliding sleeve comprises first one (18.1), this first one remains on first tube elements (3) with sliding sleeve (18a) and locates, this sliding sleeve (18a) comprises second one (18.2), this second one contacts with second tube elements (4) under the effect of the power that can regulate (F), and with first one (18.1) associating, and all parts of second one (18.2) of this sliding sleeve (18a) are positioned at the front of first end (3.1) of first tube elements (3);

And described syndeton (7,8) comprises second carriage (19) between the outermost free end (16,17) that is positioned at half one of connection (9,10), comprise two side surfaces (20,21) with relevant end surfaces (16a, 17a) contact, wherein at least one side surface (20,21) comprises the structure (22) that increases friction, and described friction is worked between the side surface (20,21) of end surfaces (16a, 17a) and second carriage (19) that contacts with end surfaces (16a, 17a).

2. ventilating arm according to claim 1 (1), wherein said first carriage (18) comprise the device (23,24) that is used for conveying capacity (F).

3. ventilating arm according to claim 2 (1), the wherein said device that is used for conveying capacity comprises rounded portions (23), it contacts with sliding sleeve (18a), and is arranged in the first hollow compartment (25) in the sliding sleeve (18a, 18.2).

4. according to claim 2 or 3 described ventilating arms (1), the device that wherein is used for conveying capacity comprises tensioning apparatus (24), and it makes to increase or reduce described power (F) becomes possibility.

5. ventilating arm according to claim 4 (1), wherein said tensioning apparatus (24) are arranged in the compartment in the sliding sleeve (18) (25,25a).

6. ventilating arm according to claim 1 (1), comprise sliding control member (26), it is arranged between first and second tube elements (3,4), and first end (4.1) that is arranged on second tube elements (4) is located and be integrated with it, and this end is arranged in first tube elements (3).

7. ventilating arm according to claim 6 (1), wherein said sliding control member (26) comprises flange (27), it is arranged on the outer surface of second tube elements (4), and making sliding control member (26) and first tube elements (3) associating, wherein said sliding control member (26) has conical in shape.

8. ventilating arm according to claim 1 (1) comprises erecting device (28), and it makes ventilating arm (1) is installed to ventilating arm is supported on the supporting construction (Y) in the room becomes possibility.

9. ventilating system, comprise ventilating arm according to claim 1 (1) and air extractor (29), this air extractor produces negative pressure in ventilating arm (1), the pollutant of the particle of dissimilar undesired air bearings and material, air bearing is transported away from the localized area (Z) at the openend (1.1) of described arm.