WO2010118723A1 - Device for generating a pulsating fluid current - Google Patents

Abstract

The present invention relates to a device for generating a pulsating fluid current, primarily of fluids and of gases, comprising at least one fluid inlet (1), a fluid outlet (2) and a pulse generator (4), which is provided at the opening (3) disposed between the fluid inlet (1) and fluid outlet (2) and which cyclically interrupts and then releases the fluid flow again, characterized in that a ferromagnetic or magnetic hollow body (5) is provided at the opening (3) by which body a ferromagnetic or magnetic pulse generator (4) is attracted due to a magnetic field strength such that the pulse generator (4) is pulled entirely or partially into or to the opening (3) and thereby – at least nearly - closes off the fluid flow at the opening (3) in an air-tight and/or water-tight manner.

Description

 DESCRIPTION

Technical area

[0001] The present invention relates to a device for generating a pulsating fluid flow, primarily of liquids as well as of gases, comprising at least one fluid inlet, one fluid outlet and a shut-off body provided at the opening arranged between the fluid inlet and the fluid outlet (hereinafter referred to as pulser). characterized), which cyclically interrupts the fluid flow and releases again.

State of the art

A pulsating fluid flow can be generated in many different ways according to the prior art. For example, it is known to use a valve which is arranged in a line to be flowed through by the fluid and alternately closes and releases a passage through the valve. Furthermore, from PCT / EP2002 / 001372 a device for generating a comparatively high frequency pulsating fluid flow is known, which comprises a rotatable about a rotation axis blocking element, wherein the blocking element has a blocking part, which cyclically a fluid passage from the fluid inlet to the fluid outlet closes and releases. The disadvantage of these devices, however, is that they are on the one hand designed technically complex and on the other hand can be used only in a limited area. Further, known devices for generating a pulsating fluid flow are designed to be fragile, especially with regard to the formation of corrosion and deposits (eg of lime). Due to the heavy mechanical stress of the pressure pump and the rotating parts in PCT / EP2002 / 001372, the materials to be used are exposed to rapid mechanical wear. In case of failure, the repair is cumbersome and costly. In addition, the pulsing effect is not generated in the region of the exit of the fluid. Dαrstellung of the invention

[0003] The present invention is based on the object of providing a device which operates reliably and without complications and which generates a pulsating fluid flow arising solely by pressure, which in design terms is simple and inexpensive to construct, manufacturable and, moreover, versatile and durable is effectively used, and beyond any incidents are easy to eliminate. In addition, all mechanical components of the device should be easily accessible and interchangeable.

According to the invention the above object is achieved with the features of claim 1. Advantageous embodiments of the invention are given in subclaims.

Thereafter, a device of the type mentioned is characterized in that a ferromagnetic or magnetic hollow body is provided, to which a ferromagnetic or magnetic pulse generator is attracted by a magnetic field strength such that the pulser completely or at least almost in or on the Opening the hollow body is pulled and thus the fluid flow at the opening - at least nearly - air and / or watertight seals.

If a pressure of a liquid o- and gaseous medium constructed in the line of the fluid inlet, holds the magnetic force of the hollow body and / or the magnetic pulser this up to a preferably definable pressure point state at which the pressure force of the medium, the magnetic attraction of / the magnet exceeds and overcomes, so that the pulser then at least partially ruptures from the opening or at least slightly pushed by her. In this case, the flow of the medium at the opening is released in the short term by the resulting gap between the opening and the pulser, and a portion of the medium can escape through the gap in the direction of the fluid outlet. chen. The erfinduπgsgemäße means thus not only creates a pulsating fluid flow, but the fluid flow, which penetrates out of the gap, also experiences even a particularly high pressure.

Depending on the field of application, the magnet on the hollow body and / or on the pulse generator can be an electromagnetic or permanent magnetic field. At very high pressure and / or high temperature, or if a more accurate and continuous control of the pulse pressure and the pulse rate is required, instead of the permanent magnets, the technically more complex electromagnet in the same mode of operation with variable coefficients would be much more versatile.

When partial demolition and dislodgement of the pulser (flow position) this drifts slightly laterally from the opening, so that he still still adheres to the opening, but the medium can escape through the now released gap. Thereafter, the pulser is promptly retracted again due to the abruptly occurring pressure drop of the medium by the magnetic force of the electric or permanent magnet back to the starting point (rest position). As a result, the flow of the medium at the opening is again immediately short-term blocked to be immediately pushed back by the newly building pressure, so that this pulsating process repeated steadily, ie the pulser constantly changes between rest position and flow position. The pulse effect, the pulse frequency and strength depends on the interaction of the coefficients, such as the magnetic field strength, the size and shape of the respective pulser, the size and shape of the opening, the pressure in the medium and the temperature. In this respect, depending on the field of application, the hollow body or its surface and the pulser attached to it can vary in shape and size. In a particularly preferred embodiment, the pulse generator has the shape of a sphere; the opening on the hollow body is designed round in this case. - A - Brief description of the drawings

Other objects, features, advantages and applications of the device according to the invention will become apparent from the following description of several embodiments with reference to the drawings.

All described and / or illustrated features, alone or in any combination form the subject matter of the invention, regardless of the summary in individual claims or their dependency.

In the drawings show

[001 1] Fig.l the device according to the invention in a particularly preferred embodiment with a arranged on the hollow body 5 and projecting into the opening 3 spherical pulse generator 4 in a perspective view;

2 shows the device as in FIG. 1, wherein all components (connecting piece 6, hollow body 5, end piece 7) are assembled or screwed together;

The device in a further embodiment, wherein at the opening 3 a pulser 4 holding and the fluid permeable strut-like boundary 9 is provided;

The device for illustration without pulser 4 and 9 limit;

[0015] FIG. 5 shows the device according to the invention in a two-dimensional plan view and in section;

Figure 6 and Figure 7 show the device in a further embodiment in perspective view. Embodiment of the invention

FIG. 1 shows a perspective view of the device according to the invention in a particularly preferred embodiment with a spherical pulse generator 4 arranged on the hollow body 5 and projecting partially into the opening 3.

As can be seen from Fig.l, the device shown preferably consists of four components 4,5,6,7, namely (in their arranged in Fig.l sequence) a connector 6 for a fluid flow line, a cylindrical and preferably magnetic hollow body 5 with a round opening 3, wherein the hollow body 5 is formed so that it can be inserted almost positively into the connector 6 (see also Fig.2). Furthermore, a spherical ferromagetic pusher 4 and an end piece 7 (for example a jet regulator) which can be screwed onto the connection piece 6 are provided with an outlet opening 8 for a gaseous or liquid medium.

For optimum function of the device is a precise adjustment in the interaction of the individual values such as magnetic force, size and shape of the pulser, temperature of the environment and the medium required. When using a permanent magnet on the hollow body 5 - as in the preferred embodiment shown - the use of a neodymium magnet because of the high magnetic field strength is a particularly preferred embodiment. However, since this is brittle and fragile and by the frequent recoil of the pulser 4 during the application could be damaged, which also greatly accelerated corrosion and so the function would be impaired, it should be provided with a hard (preferably electroplated) special coating. In addition, the damage to the magnet on the hollow body 5 by the recoil of the pulser 4 can be almost excluded that a stainless, coated and magnetizable metal disc with hole on the front surface of the hollow body 5 is arranged congruent fitting to the recoil of the pulser 4th intercept. The resulting magnetic force loss on the pulser 4 could be compensated by a correspondingly stronger magnet on the hollow body 5.

In addition, a layer of a flexible material such as rubber, silicone, plastic o.a. be provided both for damping and cushioning of the recoil of the pulse generator 4 as well as for sealing the medium during pressure build-up in the rest position at the edge of the opening 3. In addition, since the magnetic force decreases with increasing temperature, it is intended to use, if necessary, a more temperature-stable special magnet, which is then adapted in size and magnetic force of the task.

In addition, the use of the technique of the so-called. Passivierens is very suitable to minimize the heating of the ring magnet and thus the reduction of the magnetic force.

As can be seen from Figure 3, the pulser 4 may be surrounded by means provided at the opening 3 and the medium permeable strut-like boundary 9 such that by means of the boundary 9 too far lateral drifting or even a total demolition of the pulser. 4 is prevented to ensure that the pulser 4 can always return to its original position.

Also, the freedom of movement of the pulser 4 and thus the pulse rate can be regulated by a variable limit 9, since the pulser 4 pulled in narrowing the freedom of movement and therefore less space for drifting faster in the rest position and thus the frequency is increased, and with increased Bewegungsrαum the pulser can continue αbdriften, and thus slower and later returns to the rest position, and thus the pulse rate is lowered.

In various experiments with the device according to the invention has been shown that the pulse effect is improved when the kit is stored sprung, d. H. the backlash is given room.

In a particularly preferred embodiment of the device, this is designed so that the field strength of / the magnet in the region of the hollow body 5 automatically adapts or is adapted to the rising or falling water pressure. To achieve this, an additional ring magnet may be provided in the region of the hollow body 5, the inner diameter of which is minimally larger than the outer diameter of the cylindrical hollow body 3 to which the pulse generator 4 adheres. This additional ring magnet is spring-loaded and arranged such that it is pressed within the water-supplying line (fluid inlet 1) with increasing water pressure along the outer wall of the hollow body 5 in the direction of the pulser 4. As a result, the force acting on the ferromagnetic pulse generator 4 in this case magnetic force is amplified, so that the force with which the pulser 4 is pulled in the position of the strongest attraction, the respective water pressure is automatically adjusted.

In addition, an adjustment outside of the fluid inlet 1 is also conceivable. Thus, in a further embodiment, a thread is provided on the outer edge of the additional ring magnet, which can be set manually by turning (screwing) by means of a counter thread arranged on the inner edge of the connection piece 6 or fluid inlet 1.

6 shows the device in a further embodiment in a perspective view. To ensure that the demolition occurs even at low water pressure, are above the pulser 4 - like out Figure 6 visible - Scheibenmαgnete 12 or a corresponding Stαb- mαgnet 12 arranged. As a result, the magnetic force acts centered on the pulser 4. The adhesive force of the pulser 4 in the form of an iron ball is amplified. Since the pulse generator 4 in this embodiment is preferably smaller, it tears off even at a much lower pressure, but is drawn back into the rest position immediately after the pressure drop due to the increased and centered magnetic force in order to re-pressurize to the next demolition.

The weight of the additional magnets 12 and the leverage of the rod-shaped additional magnets 12 favor the partial demolition and drifting of the iron ball considerably. The return of the pulse generator 4 in the rest position can be facilitated by the surface around it slightly increases conically to the wall of the end piece 7. In addition, a more stable function can be achieved if a predetermined dent is arranged laterally, in the (target) direction of the pulser 4 is then directed.

Advantageously, however, this effect can also be achieved by using a pulse generator 4 in the form of an iron or ceramic magnetic ball whose magnetic force is not too strong (a neodymium magnetic ball would have an excessive adhesive force), if the additional bar magnet 12 is not used.

As can be seen from Figure 7, the delimitation of the pulser 4 can also be done in this embodiment by means of a ball 4 surrounding strut-like boundary 9, wherein the struts, however, end where the rod-shaped additional magnets 12 require a free space for movement, ie Although the ball 4 clearance is granted to the required partial demolition, but the total demolition, in which the return to the rest position is no longer possible, is prevented. Alternatively, a ring can be fixed over the pulser 4 that the required freedom of movement of the pulser 4 and the docked magnets 12 is ensured, but is avoided by the limitation of the ring of excessive demolition. The inner diameter of the ring is minimally smaller than the diameter of the iron ball 4th

Also, in front of the docked bar magnet 12, a guide in the form of an additional ring or a cylindrical guide channel could be arranged such that sufficient freedom of movement still exists for the function, but the return to the position of greatest attraction is prescribed and thus a trouble-free function is ensured.

The device according to the invention is not limited in its execution to the above-mentioned preferred embodiments. On the contrary, a large number of design variations are conceivable, which make use of the illustrated solution even in the case of fundamentally different designs.

List of reference numbers

1 fluid outlet

2 fluid outlet

3 opening

4 pulser

5 hollow bodies

6 connection piece

7 tail

8 outlet opening

9 limitation

10 external threads on 6

1 1 gap

12 disc magnets / bar magnet

Claims

1 . Device for generating a pulsating fluid flow, primarily of liquids as well as of gases, comprising at least one fluid inlet (1), one fluid outlet (2) and an opening (3) arranged between the fluid inlet (1) and fluid outlet (2) provided pulse generator (4) which cyclically interrupts the fluid flow and releases again, characterized in that at the opening (3) has a ferromagnetic or magnetic Hollow body (5) is provided, to which a ferromagnetic or magnetic pulser (4) is attracted by a magnetic field strength such that the pulser (4) is pulled completely or at least almost into or on the opening (3) and thus the FIu - idfluss at the opening (3) - at least almost - air and / or watertight seals. 2. Device according to claim 1, characterized in that the pulse generator (4) is spherical and the opening (3) is designed round. 3. Device according to claims 1 and / or 2, characterized in that the hollow body (5) is formed so that it can be inserted almost positively into a device provided on the fitting (6) for a fluid flow line. 4. Device according to one or more of the preceding claims, characterized in that on the connecting piece (6) aufschraubbares tail (7) is provided with an outlet opening (8) for a gaseous or liquid medium. 5. Device according to one or more of the preceding claims, characterized in that on the hollow body (5) a neodymium magnet is provided. 6. Device according to one or more of the preceding claims, characterized in that the pulse generator (4) is provided with a hard (preferably electroplated) special coating. 7. A device according to one or more of the preceding claims, characterized in that a stainless, coated and magnetizable metal disc with bore on the front surface of the hollow body (5) is arranged congruent fitting. 8. Device according to one or more of the preceding claims, characterized in that at the edge of the opening (3) a layer of a flexible material such as rubber, silicone, plastic or both for damping and cushioning of the recoil of the pulser (4) as well as for sealing the medium is provided during pressure build-up in the rest position. 9. Device according to one or more of the preceding claims, characterized in that the pulse generator (4) by means of a at the opening (3) vorgesehe- nen and the medium permeable boundary (9) is surrounded. 10. Device according to one or more of the preceding claims, characterized in that the field strength of / the magnet in the region of the hollow body (5) automatically adjusts or is adapted to the rising or falling water pressure. 1 1. Device according to one or more of the preceding claims, characterized in that in the region of the hollow body (5) an additional ring magnet is provided, whose inner diameter is minimally larger than the outer diameter of the cylindrical hollow body 3, to which the pulse generator 4 adheres. 12. Device according to one or more of the preceding claims, characterized in that the ring magnet spring-loaded is arranged such that it within the water-supplying line (fluid inlet (I)) with increasing water pressure along the outer wall of the hollow body (5) in the direction of the pulser ( 4) is pressed. 13. Device according to one or more of the preceding claims, characterized in that an adjustment of the ring magnet is provided outside the fluid inlet 1 s. 14. Device according to one or more of the preceding claims, characterized in that above the pulser (4) disc magnets (12) or a Bar magnet (12) are arranged. 15. Device according to one or more of the preceding claims, characterized in that a ring is provided above the pulser (4), so that the required freedom of movement of the pulser (4) and the magnets (12) is ensured, but by the limitation of the ring the excessive demolition is avoided.