WO2008096229A1

WO2008096229A1 - Unit for cleaning industrial filters

Info

Publication number: WO2008096229A1
Application number: PCT/IB2008/000246
Authority: WO
Inventors: Mario Schenetti
Original assignee: Autel S.R.L.
Priority date: 2007-02-09
Filing date: 2008-02-05
Publication date: 2008-08-14
Also published as: CN101610827A; CN101610827B; ITMO20070043A1

Abstract

The unit (1) for cleaning industrial filters, comprising a tank (2) for containing gas under pressure having a substantially curved outer surface, at least one pipe (5) which is at least partially housed inside the tank (2) and which has a first inlet end for gas under pressure communicating with a first hole on the tank by interposition of valve means (7) and a second outlet end for gas under pressure, protruding from a second hole on the tank and associable with a filter, at least one coupling body which is fastened integral with the tank at the first hole and which at least partially houses the first end and removable fastening means of the valve means to the coupling body.

Description

UNIT FOR CLEANING INDUSTRIAL FILTERS

Technical Field

The present invention relates to a unit for cleaning industrial filters.

Background Art Within the industrial field, the use is known of filtering appliances of different types suitable for the dust collection of gaseous currents along a system.

For example, the industrial use is known of filtering appliances such as sleeve, cartridge or pocket filters.

These filters generally have a container inside which is arranged a plurality of filtering elements which trap the solid particles to be separated when the gas to be filtered flows into them.

The filters are commonly associated with units for cleaning the filtering elements of the type, for example, of compressed-air shaking systems for the periodical removal of the trapped solid particles. In point of fact, a jet of compressed air produced by the cleaning unit invests the filtering elements, causing the detachment of the trapped solid particles which, by means of gravity, are collected at the bottom of the container.

The solid particles thus collected are then transported and, if necessary, stored by means of conveyor systems. One type of such cleaning units comprises a compressed-air tank with a substantially tubular shape. A plurality of compressed-air outlet pipes, conventionally known by the name of shooting pipes, is distributed along the tank.

In particular, each of the above pipes is partially housed inside the tank and has a first compressed-air inlet end associated with the tank itself by interposition of a valve. The valve can be, for example, of the diaphragm solenoid valve type and is suitable for controlling the flow of compressed air from the tank to the pipe through the first end.

Each pipe also comprises a second compressed-air outlet end that protrudes from the tank itself and which is associable by interposition of fastening means, of the type of threaded means or the like, to at least one of the filtering elements of the above filter. The particular curved shape of the outer wall of the tank has led to the study and application of specific technical solutions suitable for ensuring the perfect seal between the tank and the pipe, in particular in the area where the pipe comes out of the tank and in the area where the valve is fastened to the tank itself. A first technical solution entails the fastening of suitable flanges by welding, on the outer surface of the tank and at the above areas, suitable for defining flat coupling surfaces on which to make the seals in a conventional way. Such first solution has a number of drawbacks, such as not negligible execution difficulties and the need to make such flanges using materials and in accordance with thicknesses and dimensions such as to ensure a perfect seal over time.

A second technical solution entails the use of a coupling body, associated with the outer surface of the tank and the shooting pipe at the first end and/or the second end by interposition of one or more sealing elements, of the type of a seal or the like. In the case of positioning at the first end of the pipe, the coupling body has a flat coupling surface sealed with the valve. This solution too is not without drawbacks.

To ensure a good seal at the coupling bodies, in fact, the exit holes of the shooting pipe on the tank must be made with a very small tolerance, a condition that complicates the manufacture of the sealing units and increases their manufacturing costs. Object of the Invention

The main aim of the present invention is to provide a unit for cleaning filters that ensures a perfect seal and, at the same time, permits simplifying the manufacturing process.

Another object of the present invention is to provide a unit for cleaning filters that allows to overcome the mentioned drawbacks of the known technique within the ambit of a simple and rational solution, which is easy and effective to use, as well as having a fairly low cost. The above objects are all achieved by the present unit for cleaning industrial filters, comprising a tank for containing gas under pressure having a substantially curved outer surface, at least one pipe which is at least partially housed inside said tank and which has a first inlet end for gas under pressure communicating with a first hole on said tank by interposition of valve means and a second outlet end for gas under pressure, protruding from a second hole on said tank and associable with a filter, characterised in that it comprises a coupling body which is fastened integral with said tank at said first hole and which at least partially houses said first end and removable fastening means of said valve means to said coupling body.

Brief Description of the Drawings

Further characteristics and advantages of the present invention will appear more evident from the description of a preferred, but not exclusive, embodiment of a unit for cleaning industrial filters, illustrated indicatively by way of non limiting example in the accompanying drawings, wherein: figure 1 is a view of the cleaning unit according to the invention applied to a general industrial filter; figure 2 is an exploded view of a section of the cleaning unit according to the invention; figure 3 is a view of a detail of the cleaning unit according to the invention; figure 4 is an exploded view of a detail of the cleaning unit according to the invention. Embodiments of the Invention

With particular reference to such illustrations, a unit for cleaning industrial filters, such as, for example, sleeve, cartridge, pocket or other types of filters has been globally indicated by 1.

The unit 1 comprises a tank 2 for containing gas under pressure of the compressed-air type, for example, and having a substantially curved outer surface.

Preferably, the tank 2 has a substantially tubular and elongated shape. Different shapes of the tank 2 cannot however be ruled out.

The tank 2 comprises at least one first hole 3 and one second hole 4 defined at diametrically opposite portions of the tank itself.

The unit 1 also comprises at least one pipe 5 which is partially housed inside the tank 2 and which has a first end 5a having an inlet mouth 6 for the gas under pressure. The inlet mouth 6 communicates with the first hole 3 by interposition of valve means 7 for the controlled supply of this gas.

In particular, the valve means 7 are arranged outside the tank 2 and, in the specific embodiment shown, are made up of a diaphragm valve. Actuator means of the electric or pneumatic type, not shown in the above illustrations because they are of known type, are operatively associable with the diaphragm valve for its opening and closing.

A second end 5b of the pipe 5 is arranged protruding from the second hole 4 of the tank 2 and has an outlet mouth 8 for the gas under pressure. The second end 5b is associable with a filter F which can, generically, be of the sleeve, cartridge, pocket or other type.

Figure 1 shows a unit 1 in which the tank 2 has a plurality of first and second holes 3 and 4 inside which are fitted respective pipes 5 with the respective first ends 5a having valve means and with the respective second ends 5b associated with a conventional filter F.

Advantageously, the unit 1 comprises at least one coupling body 9 which is fastened integral to the tank 2 at the first hole 3 and which partially houses the first end 5 a of the pipe 5.

In particular, the coupling body 9 is partially fitted to measure inside the first hole 3 and has a perimeter wall that is fastened by welding along the edge of the first hole 3.

Usefully, the outer surface of the pipe 5, at the second end 5b, is also fastened by welding along the edge of the second hole 4.

The use of different methods cannot be however ruled out for fastening the coupling body 9 and the pipe 5 to the tank 2 such as, for example, fastening by gluing.

The coupling body 9 comprises a portion inside the tank 2 having a first opening 10 for fitting the first end 5a of the pipe 5.

The inner portion of the coupling body 9 also has a plurality of transit openings 11 for the gas under pressure from the tank 2, through the first hole 3, towards the inlet mouth 6 on the first end 5a.

Usefully, with particular reference to the described embodiment, the coupling body 9 has a substantially cup shape and the first opening 10 is defined on the bottom of the coupling body 9 and is substantially circular, to reproduce the profile of the pipe 5.

The above transit openings 11 are defined on the bottom of the coupling body 9, have a substantially elongated profile and are distributed around the first opening 10.

The coupling body 9 comprises a portion outside the tank 2 having a second opening 12 from which the inlet mouth 6 is arranged facing on the first end 5a of the pipe 5. In particular, such second opening 12 is delimited by the outer edge of the perimeter wall of the coupling body 9.

Advantageously, the coupling body 9 comprises an anchor plate 13 for the valve means 7, of the type of a flange or the like; the anchor plate 13 extends overhanging along the edge of the perimeter wall of the coupling body 9. The valve means 7 comprise a cover 14 which, in an assembly configuration of the unit 1, is associated sealed to the anchor plate 13, and a diaphragm 15 for opening and closing the inlet mouth 6 of the pipe 5 which is placed in between the plate itself and the cover 14.

In an opening configuration, the diaphragm 15 is kept away from the inlet mouth 6, placing the inside of the tank 2 and the inlet mouth 6 in communication through the transit openings 11 on the bottom of the coupling body 9.

In a closing configuration, on the other hand, the diaphragm 15 blocks the inlet mouth 6 through operation of the actuator means, preventing the flow of gas from the tank 2 to the pipe 5.

Usefully, the anchor plate 13 has a perimeter groove 13a for housing a rib that extends along the edge of the diaphragm 15. The presence of such perimeter groove 13a ensures the perfect seal of the coupling between the coupling body 9 and the diaphragm 15 of the valve means 7. Advantageously, the unit 1 comprises removable fastening means of the valve means 7, in particular of the cover 14, to the coupling body 9.

Such removable fastening means comprise a retention element 16 of the cover 14, composed of a stop ring positionable around the perimeter wall of the coupling body 9, close to the anchor plate 13 and which can be coupled to the cover 14 for closing the valve means 7.

In particular, on the ring 16 are distributed a plurality of threaded holes 17 that can be coupled with corresponding through holes 18 on the cover 14 by means of screws 19 or the like.

The anchor plate 13 is placed in between the ring 16 and the cover 14 and has a plurality of through holes 20 aligned with the threaded holes 17 of the ring 16 and with the through holes 18 of the cover 14 for fitting the aforementioned screws 19.

Usefully, the ring 16 is shaped to reproduce the profile of the cover 14 and has a raised perimeter edge 21 that defines a partial housing seat of the cover 14 in the assembly configuration.

The ring 16 is composed of two sections 16a and 16b that can be assembled together by interlocking. The embodiment cannot however be ruled out of a ring

16 shaped differently and/or made up of a different number of sections assembled together by interlocking.

Each of said sections 16a and 16b has an end with an appendix 22 that can be fitted in a suitable slot 23 defined in one end of the other of the sections 16a and 16b.

In particular, the appendix 22 is made up of a transversal section protrusion substantially diverging outwards and the slot 23 is made up of a seat copying said protrusion.

Once the two sections 16a and 16b have been positioned on the perimeter wall of the coupling body 9 and the appendices 22 have been fitted inside the relative slots 23, by applying a suitable pressure, the ring 16 is fastened to the coupling body 9.

It has in fact been found how the described invention achieves the proposed objects and in particular the fact is underlined that the presence of the coupling body and of the retention element of the valve means ensures a perfect seal of the unit and, at the same time, permits simplifying the realisation process of the unit itself. More specifically, the direct fastening of the coupling body to the tank permits reducing the number of elements required to ensure the perfect seal of the unit, such as seals or other blocking elements, thereby cutting the manufacturing costs of the unit itself. Furthermore, the presence of the retention element, in particular of the ring positionable on the perimeter wall of the coupling body, allows maintaining a perfect seal of the valve means over time notwithstanding the continuous stresses generated by the gas under pressure inside the tank. The invention thus conceived is susceptible to numerous modifications and variations, all of which falling within the scope of the inventive concept.

Furthermore all the details can be replaced with others that are technically equivalent.

In practice, the materials used, as well as the contingent shapes and dimensions, may be any according to requirements without because of this moving outside the protection scope of the following claims.

Claims

1) Unit for cleaning industrial filters, comprising a tank for containing gas under pressure having a substantially curved outer surface, at least one pipe which is at least partially housed inside said tank and which has a first inlet end for gas under pressure communicating with a first hole on said tank by interposition of valve means and a second outlet end for gas under pressure, protruding from a second hole on said tank and associable with a filter, characterised in that it comprises at least one coupling body which is fastened integral with said tank at said first hole and which at least partially houses said first end and removable fastening means of said valve means to said coupling body.

2) Unit according to claim 1, characterised in that said fastening means comprise at least one retention element of said valve means associable to said coupling body. 3) Unit according to one or more of the preceding claims, characterized in that said coupling body is fastened to said tank by welding, gluing or the like. 4) Unit according to one or more of the preceding claims, characterized in that said coupling body is at least partially fitted and to measure inside said first hole. 5) Unit according to one or more of the preceding claims, characterized in that said coupling body comprises a perimeter wall that is welded or glued along the edge of said first hole.

6) Unit according to one or more of the preceding claims, characterized in that said coupling body comprises a portion inside said tank having a first opening for fitting said pipe.

7) Unit according to one or more of the preceding claims, characterized in that the inner portion of said coupling body comprises at least one transit opening for the gas under pressure from said tank towards said first end.

8) Unit according to one or more of the preceding claims, characterized in that the inner portion of said coupling body comprises a plurality of said transit openings.

9) Unit according to one or more of the preceding claims, characterized in that said coupling body comprises a portion outside said tank having at least a second opening, the first end of said pipe substantially facing from said second opening.

10) Unit according to one or more of the preceding claims, characterized in that the outer portion of said coupling body comprises at least one anchor plate for said valve means.

11) Unit according to one or more of the preceding claims, characterized in that said anchor plate is of the type of a flange or the like.

12) Unit according to one or more of the preceding claims, characterized in that said anchor plate is associated to at least one diaphragm of said valve means suitable for closing and opening the first end of said pipe.

13) Unit according to one or more of the preceding claims, characterized in that said anchor plate comprises at least one perimeter groove for housing the edge of said diaphragm. 14) Unit according to one or more of the preceding claims, characterized in that said coupling body has a substantially cup shape.

15) Unit according to one or more of the preceding claims, characterized in that said first opening is defined on the bottom of said coupling body.

16) Unit according to one or more of the preceding claims, characterized in that said transit opening for the gas under pressure is defined at the bottom of said coupling body.

17) Unit according to one or more of the preceding claims, characterized in that said retention element comprises at least one stop ring associable to said valve means and positionable on the perimeter wall of said coupling body. 18) Unit according to one or more of the preceding claims, characterized in that in an assembly configuration said ring is coupled to at least one cover for closing said valve means positioned on said diaphragm.

19) Unit according to one or more of the preceding claims, characterized in that said ring comprises at least one threaded hole that can be coupled with a corresponding through hole on said cover by fitting and tightening a screw or the like.

20) Unit according to one or more of the preceding claims, characterized in that said anchor plate is placed in between said ring and said cover.

21) Unit according to one or more of the preceding claims, characterized in that said anchor plate has at least one through hole substantially aligned with the threaded hole on said ring and with the through hole on said cover for fitting said screw or the like.

22) Unit according to one or more of the preceding claims, characterized in that said ring is shaped to reproduce at least partially the profile of said cover.

23) Unit according to one or more of the preceding claims, characterized in that said ring comprises a raised perimeter edge suitable for defining an at least partial housing seat of said cover.

24) Unit according to one or more of the preceding claims, characterized in that said ring comprises at least two sections that can be assembled together by interlocking.

25) Unit according to one or more of the preceding claims, characterized in that at least one of said two sections comprises at least one protruding appendix which can be fitted by interlocking in a corresponding slot on the other of said sections.

26) Unit according to one or more of the preceding claims, characterized in that the outer surface of said pipe at said second end is fastened along the edge of said second hole by welding, gluing or the like.

27) Unit according to one or more of the preceding claims, characterized in that said tank has a substantially tubular shape.