EP2060332A2 - Suction device for finely dispersed materials - Google Patents

Abstract

The suction unit (AER) for finely distributed and/or gaseous substances has an annular body which has an upper section (OTE) and a lower section (UTE), wherein upper section and lower section are held together in the in-use state by a clamping device (SSM), and after opening of the clamping device are separable, freeing the interior of the annular body. The discharge opening is delimited by a lower cylindrical wall section and an adjoining upper conical wall section which widens upwards and outwards, wherein the suction holes (ASB) are formed in the conical wall section.

Description

The invention relates to a suction device for finely divided and / or gaseous substances, which is formed as a hollow annular body with a central pour opening, at least one pipe connection leads into the interior of the annular body and in the wall defining the pouring opening a plurality of suction holes is formed, wherein the bores communicate via the interior of the hollow ring body with the pipe connection.

In particular, in the chemical industry, but also in other industries, such as the food industry, the problem arises that when loading or transferring especially powdery substances dust or aerosol mist arise that is not in the destination, eg. B. a reaction vessel, but in the environment. This leads to an undesirable contamination, which also dangerous moments, eg. B. when filling / transferring toxic, explosive or otherwise hazardous substances, entails. Reinforced these problems in cleanrooms.

In order to avoid contamination of the environment, it is known in the prior art to place a mounted on a movable arm, via a suction line to a suction device, in principle a vacuum cleaner, connected suction head in the vicinity of the pouring, for example, a funnel to place , However, this solution is associated with some disadvantages, because on the one hand every time an optimal position of the suction head must be found. On the other hand, an extraction only in the direction of the suction head is possible and after the opposite direction escaping dust is not or only poorly aspirated. Although it is possible to increase the suction power in order to improve the suction effect, but then runs the risk that even the pulverulent bulk material to be filled is extracted by itself.

A suction device of the type mentioned is from the WO 03/045593 A1 known. This device is designed for the suction of toxic gases, but does not take into account the problem of sucking powdered substances, especially in connection with the requirements that are made in the pharmaceutical industry. The known device would be contaminated in use when filling powdery substances after a short time with deposits , which could hardly be removed from the device, which is usually not allowed for hygienic reasons.

An object of the invention is to provide an improved suction device which does not have the above-mentioned disadvantages.

This object is achieved with a suction device of the type mentioned, in which according to the invention the ring body has at least one upper part and a lower part, wherein the upper part and lower part held together in use by a clamping means and are separable after opening the clamping means exposing the annular body interior.

Thanks to the invention, a suction device is provided which can be adapted to any filling situation also in size and provides the best possible protection against contamination of the environment by escaping dust and aerosols, with operating errors, such as incorrect positioning of the suction head according to the prior art z. B. can not be effectively prevented by not well trained staff. The cleaning is quick and easy to carry out, which is an absolute necessity in many applications, especially in pharmaceutical companies

In an advantageous embodiment, it is provided that the pouring opening is delimited by a lower, substantially cylindrical wall section and an adjoining upper, upwardly and outwardly widened conical wall section, wherein the suction bores are formed in the conical wall section. In this way, an upwardly directed vacuum cone can be built up over the pour opening during operation.

It is also advantageous in terms of low noise development if the suction bores have a rounding at least at their outer end region facing the pouring opening.

The air duct can be kept particularly homogeneous, if that is provided between upper part and lower part partition plate with at least one passage opening, the annular body in the assembled state, at least one lower chamber and at least one upper chamber and the at least one lower chamber and the at least one upper Chamber via at least one passage opening communicate with each other. It is also advantageous if at least one upper, inner, annular chamber and at least one lower, outer chamber are provided, the pipe socket opening into the at least one lower, outer chamber and the suction bores into the at least one upper, inner chamber. A further improvement is in this case characterized in that an upper, inner, annular chamber is provided, which communicates with at least one upper, outer chamber portion, and the upper, outer chamber portion communicates with at least one outer, lower chamber via a passage opening of the separation plate, or when a guide surface which leads tangentially outwards is provided at the connection between the upper, inner, annular chamber with the at least one upper, outer chamber portion ,

In order to enable rapid disassembly and assembly of the suction device is provided in a variant of the invention that is provided at the connection between the upper, inner, annular chamber with the at least one upper, outer chamber portion, a guide surface leading tangentially outwards. In this case, an embodiment is particularly practicable, in which the quick-release head has a clamping lever with a supportable against the lower surface of the lower part eccentric surface and can be brought into train with the lower end of the clamping bolt.

Furthermore, it is expedient in the aforementioned embodiments, when each clamping bolt is cylindrical, wherein the support head is widened with respect to the cross section and the clamping bolt has at the opposite end a passing into a holding head annular groove for cooperation with the quick-release head. It can be provided that the tensioning lever has a fork-shaped end with holes in which a transverse bolt is inserted, and a standing with the clamping bolt in conjunction threaded draw bolt is screwed into a radial threaded bore of the transverse bolt.

Here, an advantageous variant may be characterized in that the clamping lever has a fork-shaped end with holes in which a transverse bolt is inserted, and a standing with the clamping bolt threaded draw bolt is screwed into a radial threaded bore of the transverse bolt.

Easy to use is a development of the invention in which the clamping bolt is connected to the threaded pull pin via a clamping piece, the clamping bolt is mounted with its holding head in a slot of the clamping piece and the threaded pull pin is screwed into a radial threaded bore of a clamping pin, in two opposite Holes of the clamping piece is added.

To prevent fouling largely can be provided that between the eccentric surface of the clamping lever and the lower part of a pressure sleeve is arranged, in which the clamping piece is housed, wherein the eccentric surface is supported on the lower part via the pressure sleeve.

Fig. 1

eine Absaugeinrichtung nach der Erfindung in einem Schnitt nach der Linie I-I der Fig. 2,

Fig. 2

eine Draufsicht auf die Absaugeinrichtung nach Fig. 1,

Fig. 3

in einem Schnitt wie Fig. 1 den Oberteil der Absaueinrichtung,

Fig. 4

in verkleinerter Draufsicht den Oberteil,

Fig. 5

einen Schnitt nach der Linie V-V der Fig. 3, verkleinert,

Fig. 6

in einem Schnitt wie Fig. 1 eine Trennplatte der Absaueinrichtung,

Fig. 7

in einem Schnitt wie Fig. 1 den Unterteil der Absaueinrichtung,

Fig. 8

eine Draufsicht auf die Trennplatte der Fig. 6, verkleinert,

Fig. 9

einen Schnitt nach der Linie IX-IX der Fig. 7, verkleinert,

Fig. 10

in einem vergrößerten Detail der Absaugeinrichtung, teilweise geschnitten, einen Spannbolzen mit einem Schnellspannkopf,

Fig. 10a

eine Druckhülse des Schnellspannkopfes, teilweise geschnitten,

Fig. 10b

einen Schnitt nach der Linie Xb-Xb der Fig. 10a,

Fig. 10 c

einen Spannhebel des Schnellspannkopfes in Draufsicht, teilweise geschnitten,

Fig. 10d

den Spannhebel der Fig. 10c in Seitenansicht,

Fig. 10e

ein Spannstück des Schnellspannkopfes im Schnitt,

Fig. 10f

einen Schnitt nach der Linie Xf-Xf der Fig. 10e und

Fig. 10g

einen Schnitt nach der Linie Xg-Xg der Fig. 10e.

The invention together with further advantages is explained in more detail below with reference to an exemplary embodiment, which is illustrated in the drawing. In this show

Fig. 1

a suction device according to the invention in a section along the line II of Fig. 2 .

Fig. 2

a plan view of the suction device according to Fig. 1 .

Fig. 3

in a cut like Fig. 1 the upper part of the suction device,

Fig. 4

in a reduced plan view the upper part,

Fig. 5

a section along the line VV the Fig. 3 , downsized,

Fig. 6

in a cut like Fig. 1 a separating plate of the suction device,

Fig. 7

in a cut like Fig. 1 the lower part of the suction device,

Fig. 8

a plan view of the partition plate of Fig. 6 , downsized,

Fig. 9

a section along the line IX-IX of Fig. 7 , downsized,

Fig. 10

in an enlarged detail of the suction device, partially cut, a clamping bolt with a quick release head,

Fig. 10a

a pressure sleeve of the quick release head, partially cut,

Fig. 10b

a section along the line Xb-Xb the Fig. 10a .

Fig. 10 c

a clamping lever of the quick release head in plan view, partially cut,

Fig. 10d

the tension lever of the Fig. 10c in side view,

Fig. 10e

a clamping piece of the quick release head in section,

Fig. 10f

a section along the line Xf-Xf the Fig. 10e and

Fig. 10g

a section along the line Xg-Xg the Fig. 10e ,

With reference to Fig. 1 and 2 First, the basic structure of a suction device AER is described according to the invention. The shape of the suction device AER corresponds to a hollow ring body, it may also be referred to as toroidal, wherein a central pour opening SOE is bounded by a wall WAN and in this wall a plurality of suction holes ASB is formed, in the present example 50 holes. More precisely, the bores are formed in an upper, upwardly and outwardly conically widened wall section KWA, which merges downward into a substantially cylindrical wall section ZWA.

The holes ASB are in a manner to be described in more detail below about the interior of the hollow body with a pipe connection, namely a pipe socket in connection ROS in the operating state of the device via a suction line, not shown, such as hose, is connected to a suction device. Thanks to the obliquely upward bores ASB ambient air is sucked in and formed a kind of vacuum cone over the pouring spout. The suction holes ASB have a rounding ARU at least at their outer end pointing toward the pouring opening SOE, in the present case, however, at both end regions, by means of which a local vortex formation and thus the noise development are reduced.

Will now z. B. a powdery substance, indicated by the arrows PUL in Fig. 1 , Filled from above through the pouring opening SOE in an only hinted hopper, which in turn opens into a reactor vessel, not shown, is sucked out of the hopper and / or the reactor vessel backflowing dust through the holes ABS, so that the dust does not enter the environment.

In view of the intended field of application of the invention, it is highly desirable that the suction device can be easily cleaned. Therefore, it can be provided that it consists of two or more parts and can be dismantled, which will be described in more detail below.

In principle, the suction device AER consists of at least one upper part OTE and a lower part UTE, wherein the upper part and lower part are held together in the state of use by a clamping device SSM and after opening of the clamping means to expose the annular body interior are separable. For better and steerable flow guidance, however, a separating plate TRP located between the upper part OTE and lower part UTE is provided with at least one passage opening DUT.

The top part OTE is in the Fig. 3 to 5 shown in detail, the lower part UTE in the FIGS. 7 and 9 and the partition plate TRP in the 6 and 8 , As a material for the three main parts OTE, TRP, UTE has proven in practice polypropylene, but it should be clear that the skilled person depending on the application, other useful materials are available.

In the assembled state, the annular body of the suction device AER has at least one lower chamber UKA and at least one upper chamber OKA, the at least one lower chamber UKA and the at least one upper chamber OKA communicating with each other via at least one passage opening DUT, in the present example two stand.

More specifically, a multi-part upper, inner, annular chamber OKA and a lower, about 180 ° extending outer chamber UKA is provided, wherein the pipe socket ROS in this lower, outer chamber UKA and the suction holes ASB in the upper, inner chamber OKA lead. The air together with any existing dust or a gas or aerosol is thus sucked through the suction holes ASB first into the inner, upper chamber OKA and passes from here to outer sections of the chamber, wherein tangentially leading outward guide surfaces LEF (see Fig. 5 ) lead the flow. From these said chamber sections, the air through the openings DUT of the partition plate (see Fig. 8 ) down into the lower, outer chamber UKA (see Fig. 9 ) sucked to finally get from here through the pipe socket ROS to the suction device, not shown. As an example, it should be noted that in practice the air flow rate is on the order of 130 m ^{3 / h} with an outer dimension of the ring body of 480 mm.

All three parts of the suction device, ie upper part OTE, partition plate TRP and lower part UTE are provided with through holes DBO, in the present case six such holes, through which clamping bolt SPB can be inserted for the clamping together of these parts. Conveniently, the holes are deliberately not located at the corners of a regular polygon in order to avoid incorrect assembly of the three parts can. The quick-release head SSK has a substantially U-shaped clamping piece PLC with two parallel legs SEL. In bores of the two legs a cylindrical clamping pin ZSS is added, which has a lying between the legs, the clamping pin radially passing through threaded hole GBO. The two legs SEL are connected at one end via a web STE, in which a slot SLI is formed.

In the slot SLI, the clamping bolt SPB is introduced with its holding head HAK, wherein the diameter of the holding head HAK is less than the inner spacing of the legs and the slot width greater than the diameter of the clamping bolt SPB at the location of its annular groove RNT.

The clamping piece SPS with the clamping pin ZSS lies within a slotted pressure sleeve DRH, which can be supported with an open end via an intermediate disk SEI on the lower part UTE. Of course, the clamping bolt SPB with the quick release head SSK could also be used upside down. In this case, the pressure sleeve would be supported on the top OTE

From the remote from the lower part UTE end of the pressure sleeve DRH protrudes into the threaded bore GBO threaded draw bolt GZB. With its other end of the threaded tie pin GZB is screwed into a radial threaded hole RGB of a transverse pin QBO, which is inserted with its two ends in bores BOR a forked end GAB a clamping lever SPH. This clamping lever SPH has at the fork-shaped end an outer cam surface EXF, which acts on a thrust washer DRS, which is supported on the outer end of the pressure sleeve DRH and penetrated by the Gewindezugbolzen GZB.

The assembly of the suction device takes place in the manner described below.

The top OTE is placed with its top on a base, after previously z. B. two clamping bolts SPB were inserted through holes DBO. Then, the partition plate TRP is placed over it, wherein the bolts SPB pass through the associated holes DBO of the partition plate TRP. Finally, the lower part UTE is placed over it so that the free ends of the bolts SPB protrude from its underside. Then the quick release head SSK is pushed with the clamping lever SPH open so that the end of the bolt with the holding head HAK passes through the slot of the pressure sleeve DRH in the slot SLI of the clamping piece SPS. Then the clamping lever SPH is closed by tilting to its end position. By turning the clamping lever SPH, the clamping force can be adjusted individually, since in this case the Gewindzugbolzen GZB is rotated with respect to the threaded bore GBO in the clamping pin ZSS. Finally, the remaining clamping bolts SPB and quick release heads SSK can be mounted. The dismantling of the device takes place mutatis mutandis after respective opening of the quick release heads SSK. In order to prevent that in the raising of the device from a filling opening, for. B. a funnel, in a poorly closed clamping lever of the quick release head SSK falls, are formed at the ends of the slot SLI of the clamping piece SPS two locking lugs SIN ( Fig. 10f ).

The support head ASK of the clamping bolt SPB can of course also be designed differently than in Fig. 10 For example, it may be a hexagon head received in a correspondingly shaped recess of the top OTE.

The quick release head SSK can also be simpler in construction and, for example, consist only of a spring plate with a slot which is pushed onto the end of the clamping bolt such that the slot comprises the annular groove RNT.

Claims (13)

Suction device (AER) for finely divided and / or gaseous substances, which is designed as a hollow annular body with a central pouring opening (SOE), at least one pipe connection (ROS) leads into the interior of the annular body and in the wall defining the pouring opening (WAN) Variety of suction holes (ASB) is formed, wherein the holes are connected via the interior of the hollow ring body with the pipe connection
characterized in that
the annular body has at least one upper part (OTE) and one lower part (UTE), wherein the upper part and lower part are held together in use by a tensioning means (SSM) and are separable upon opening of the clamping means exposing the annular body interior. Suction device (AER) according to claim 1, characterized in that the pouring opening (SOE) of a lower, substantially cylindrical wall portion (ZWA) and an adjoining upper, upwardly and outwardly flared conical wall portion (KWA) is limited, wherein the suction holes (ASB) are formed in the conical wall portion. Suction device (AER) according to claim 1 or 2, characterized in that the suction bores (ASB) have a rounding (ARU) at least at their outer end pointing towards the pouring opening (SOE). Suction device (AER) according to one of claims 1 to 3, characterized in that between the upper part (OTE) and lower part (UTE) located separating plate (TRP) with at least one passage opening (DUT) is provided, the annular body in the assembled state, at least one lower Chamber (UKA) and at least one upper chamber (OKA) and the at least one lower chamber (UKA) and the at least one upper chamber (OKA) via at least one passage opening (DUT) communicate with each other. Suction device (AER) according to claim 4, characterized in that at least one upper, inner, annular chamber (OKA) and at least one lower, outer chamber (UKA) are provided, wherein the pipe connection (ROS) in the at least one lower, outer chamber (UKA) and the suction holes (ASB) into the at least one upper, inner chamber (OKA) open. Suction device (AER) according to claim 5, characterized in that an upper, inner, annular chamber (OKA) is provided which communicates with at least one upper, outer chamber section (OKS) and the upper, outer chamber section (OKS) via a passage opening (DUT) of the partition plate (TRE) communicates with at least one outer, lower chamber (UKA). Suction device (AER) according to claim 6, characterized in that at the connection between the upper, inner, annular chamber (OKA) with the at least one upper, outer chamber portion (OKS) a tangentially leading outward guide surface (LEF) is provided. Suction device (AER) according to one of claims 1 to 7, characterized in that the clamping means (SPM) clamping bolt (SPB) each with a support head (ASK) at one end and a releasable quick-release head (SSK) at the other end, wherein the Apply clamping bolts upper and lower part (OTE, UTE) in use and press against each other. Suction device (AER) according to claim 8, characterized in that the quick-release head (SSK) has a clamping lever (SPH) with a supportable against the lower surface of the lower part (UTE) eccentric surface (EXF) and with the lower end of the clamping bolt (SPB) to train can be engaged. Suction device (AER) according to claim 9, characterized in that each clamping bolt (SPB) is cylindrical, wherein the support head (ASK) is widened with respect to the cross section and the clamping bolt at the opposite end in a holding head (HAK) passing annular groove (RNT ) for the interaction with the quick release head (SSK). Suction device (AER) according to claim 10, characterized in that the clamping lever (SPH) has a forked end (GAB) with bores (BOR), in which a transverse bolt (QBO) is inserted, and with the clamping bolt (SPB) in connection standing threaded pin (GZB) is screwed into a radial threaded bore of the transverse pin (GBO). Suction device (AER) according to claim 10 and 11, characterized in that the clamping bolt (SPB) with the Gewindzugbolzen (GZB) via a clamping piece (PLC) is in communication, wherein the clamping bolt (SPB) with its holding head (HAK) into a slot (SLI) of the clamping piece is mounted and the threaded pull pin (GZB) is screwed into a radial threaded bore (GBO) of a clamping pin (ZSS), which is accommodated in two opposite holes (BOH) of the clamping piece. Suction device (AER) according to claim 12, characterized in that between the eccentric surface (EXF) of the clamping lever (SPH) and the lower part (UTE) a pressure sleeve (DRH) is arranged, in which the clamping piece (PLC) is housed, wherein the Eccentric surface (EXF) supported by the pressure sleeve on the lower part.

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