EP2060332B1 - Suction device for finely dispersed materials - Google Patents

Abstract

The suction device (AER) for finely distributed and/or gaseous substances has an annular body with an upper (OTE) and a lower (UTE) section, wherein the upper section and the lower section are held together in the in-use state by a clamping arrangement (SSB), and after releasing the clamping arrangement are separable, freeing the inside of the annular body. The discharge opening is defined by a lower basically cylindrical wall section and an upper, upwards and outwards widening conical wall section adjoining it, 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, which is not in the destination, z. 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.

A suction device of the type mentioned is from the WO 03/045593 A1 , which discloses a Abraugeinrichtung according to the preamble of claim 1, has become known. This device is designed for the extraction of toxic gases, but does not take into account the problem of sucking powdery substances, in particular in connection with the demands made in the pharmaceutical industry. The known device would be in use when filling powdered Substances are contaminated after a short time with deposits that 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 according to claim 1.

In this way, an upwardly directed vacuum cone can be built up over the pour opening during operation.

According to one embodiment, it is provided that the annular body has at least one upper part and one lower part, the upper part and lower part being held together in the use state by a tensioning means and being separable upon opening of the tensioning means exposing the annular body interior.

Thus, 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, whereby operating errors, such as a wrong positioning of the suction head can be prevented. The cleaning is quick and easy to carry out, which is necessary in particular in pharmaceutical companies.

Advantageously in the sense of low noise, it is further, if the suction holes have a rounding at least in their outer, pointing to the pour opening end.

The air duct can be kept particularly homogeneous if a separating plate located between upper part and lower part is provided with at least one passage opening, the annular body has at least one lower chamber and at least one upper chamber in the assembled state and these chambers communicate with each other via at least one passage opening. 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 lower, outer chamber and the suction bores into the 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 via a passage opening of the partition plate with at least one outer, lower Chamber is in communication or if at the connection between the upper, inner, annular chamber with the at least one upper, outer chamber portion is provided a tangentially leading outward guide surface.

The clamping means may include a clamping bolt, each having a support head at one end and a releasable quick-release head at the other end, wherein the clamping bolts upper and lower part prevail in use and press against each other. In this case, an embodiment is particularly practicable, in which a 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 merging 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.

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.

In order 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 via a pressure sleeve on the lower part.

Figur 1:

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

Figur 2:

eine Draufsicht auf die Absaugeinrichtung nach Figur 1,

Figur 3:

in einem Figur Schnitt wie Figur 1 den Oberteil der Absaugeinrichtung,

Figur 4:

in verkleinerter Draufsicht den Oberteil,

Figur 5:

einen Schnitt nach der Linie V-V der Figur 3, verkleinert,

Figur 6:

in einem Schnitt wie Figur 1 eine Trennplatte der Absaugeinrichtung,

Figur 7:

in einem Schnitt wie Figur 1 den Unterteil der Absaugeinrichtung,

Figur 8:

eine Draufsicht auf die Trennplatte der Figur 6, verkleinert,

Figur 9:

einen Schnitt nach der Linie IX-IX der Figur 7, verkleinert,

Figur 10:

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

Figur 10a:

eine Druckhülse des Schnellspannkopfes, teilweise geschnitten,

Figur 10b:

einen Schnitt nach der Linie Xb-Xb der Figur 10a,

Figur 10c:

einen Spannhebel des Schnellspannkopfes in Draufsicht, teilweise geschnitten,

Figur 10d:

den Spannhebel der Figur 10c in Seitenansicht,

Figur 10e:

ein Spannstück des Schnellspannkopfes im Schnitt,

Figur 10f:

einen Schnitt nach der Linie Xf-Xf der Figur 10e und

Figur 10g:

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

The invention together with further advantages is explained 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 figure 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. 10c:

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

Figure 10g:

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

With reference to FIGS. 1 and 2 First, the basic structure of a suction device AER is described according to the invention. The design of the suction device AER corresponds to a hollow annular 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 Holkörpers with a pipe connection, namely a pipe socket ROS in combination, which is connected in the operating state of the device via a suction line, not shown, such as hose with a suction device. Thanks to the obliquely upward suction holes 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 towards the pouring opening SOE, but in this case at both end regions, by means of which a local vortex formation and thus the noise development is reduced.

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

In view of the intended field of application of the invention, it is desirable that the suction device can be easily cleaned. Therefore, one can provide 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, the upper part and lower part held together by a clamping means SSM in use and separated after opening the clamping means SSM exposing the interior of the ring body. For better and steerable flow guidance, a separating plate TRP located between upper part OTE and lower part UTE is provided with at least one passage opening DUT.

The top part OTE is in the FIGS. 3 to 5 shown in detail, the lower part UTE in the FIGS. 7 and 9 and the partition plate TRP in the FIGS. 6 and 8 , As a material for the three main parts OTE, TRP, UTE has been reinforced in the 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, 180 ° extending, outer chamber UKA is provided, the pipe socket ROS into this lower, outer chamber UKA and the suction holes ASB into the upper, inner chamber OKA lead. The air together with any existing dust or a gas or aerosol is thus first through the intake holes ASB in the inner, upper chamber OKA sucked and passes from here to outer sections of the chamber, wherein tangentially leading outward guide surfaces LEF (FIG. FIG. 5 ) lead the flow. From these said chamber sections, the air through the openings DUT of the partition plate ( FIG. 8 ) down into the lower, outer chamber UKA ( 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 is at an external dimension of the ring body of 480mm in the order of 130 m ³ / h.

All three parts of the suction device, d. H. Upper part OTE, separating plate TRP and lower part UTE are provided with through holes DBO, in the present case six such holes, through which clamping bolts SPB can be inserted for clamping these parts together. 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 SPS with two parallel legs SEL. In bores of the two legs SEL ZSS is received in a cylindrical pin, which has a lying between the legs SEL, the clamping pin ZSS 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 DRH 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 into 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 clamping heads SSK are 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 dropping two locking lugs SIN are formed at the ends of the slot SLI of the clamping piece SPS ( FIG. 10f ).

The support head ASK of the clamping bolt can 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 (14)

1. A suction device (AER) for finely distributed and/or gaseous substances, which

   a) is formed as a hollow annular body with a central charge opening (SOE),

   b) at least one pipe connection (ROS) leading into interior of the annular body and

   c) has a plurality of suction bores (ASB) in the bounding wall (WAN) of the charge opening, wherein

   d) the suction bores (ASB) are connected with the pipe connection (ROS) through the interior of the hollow annular body,
   characterised in that

   e) the central charge opening (SOE) is limited by a lower, mainly cylindrical wall section (ZWA) and a upper wall section KWA adjacent thereto which widens conically upwards and towards the outside, wherein

   f) the suction bores (ASB) are in the conical wall section (KWA).
2. A suction device according to claim 1, wherein the suction bores (ASB) exhibit a rounding (ARU) at least at their outer end section pointing towards the charge opening (SOE).
3. A suction device according to claim 1, wherein the suction bores (ASB) at their outer end section pointing towards the charge opening (SOE) as well as at their second end section exhibit a rounding (ARU) each.
4. A suction device according to claim 1, wherein the annular body comprises at least one upper part (OTE) and one lower part (UTE), wherein the upper part (OTE) and the lower part (UTE) are held together with a tensioning device (SSM) during operation and are separable after opening the tensioning device (SSM), revealing the interior of the annular body.
5. A suction device according to claim 4, wherein a separating plate (TRP) located between the upper part (OTE) and the lower part (UTE) with at least one aperture (DUT) is provided, the annular body in its assembled state has at least one lower compartment (UKA) and at least one upper compartment (OKA) and the at least one lower compartment (UKA) and the at least one upper compartment (OKA) are connected by at least one aperture (DUT)
6. A suction device according to claim 5, wherein at least one upper, inner, annular compartment (OKA) and at least one lower, exterior compartment (UKA) is provided wherein the pipe socket (ROS) runs into the at least one lower exterior compartment (UKA) and the suction bores (ASB) run into the at least one upper, inner, annular compartment (OKA).
7. A suction device according to claim 6, wherein one upper, inner, annular compartment (OKA) is provided which is connected to at least one upper, exterior compartment section (OKS) and the upper, exterior compartment section (OKS) is connected by an aperture (DUT) in the separating plate (TRP) with at least one exterior, lower compartment (UKA).
8. A suction device according to claim 7, wherein at the connection between the upper, inner, annular compartment (OKA) and the at least one upper, exterior compartment section (OKS) is a guiding surface leading (LEF) tangentially to the exterior.
9. A suction device according to one of the claims 5 to 8, wherein the tensioning device (SPM) has tensioning bolts (SPB) each with a supporting head (ASK) at one end and a quick-release clamping head (SSK) at the other end, wherein the tensioning bolts are passing the upper and the lower part (OTE; UTE) in operation pressing them against each other.
10. A suction device according to claim 9, wherein the quick-release clamping head (SSK) has a clamp lever (SPH) with an eccentric surface (EXF) which is supportable by the bottom surface of the lower part (UTE) and is engageable with the lower end of the tensioning bolt (SPB).
11. A suction device according to claim 10, wherein every tensioning bolt (SPB) is formed cylindrical, wherein the supporting head (ASK) is broadened in regard to the cross-section and the tensioning bolt has a radial groove (RNT) for the interaction with the quick-release clamping head (SSK) at the opposing end which merges into a supporting head (ASK).
12. A suction device according to claim 11, wherein the clamp lever (SPH) comprises a fork-shaped end (GAB) with bores (BOR) in which a cross-bolt (QBO) is inserted, and a threaded tie bolt (GZB), which is engaged with the tensioning bolt (SPB), is screwed into a radial threaded bore of the cross-bolt (GBO).
13. A suction device according to claim 11 and 12, wherein the tensioning bolt (SPB) is engaged with the threaded tie bolt (GZB) through a spanner (SPS), wherein the tensioning bolt (SPB) is hooked into a slit (SLI) of the spanner (SPS) with its supporting head (HAK) and the threaded tie bolt (GZB) is screwed into a radial threaded bore (GBO) of a clamping pin (ZSS) which is incorporated in two opposing bores (BOH) of the spanner.
14. A suction device according to claim 13, wherein between the eccentric surface (EXF) of the clamp lever (SPH) and the lower part (UTE) a pressure sleeve (DRH) is arranged which houses the spanner (SPS), wherein the eccentric surface (EXF) is supported by the lower part through the pressure sleeve.

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