EP2780096A1

EP2780096A1 - Filter part for fluid lines

Info

Publication number: EP2780096A1
Application number: EP12784463.7A
Authority: EP
Inventors: Erwin Weh; Wolfgang Weh
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-11-14
Filing date: 2012-11-09
Publication date: 2014-09-24
Also published as: DE102011118632A1; CA2855915A1; CN103958021B; KR20140097172A; CN103958021A; JP6308945B2; CA2855915C; US20140245707A1; JP2014533198A; KR102036643B1; WO2013072032A1; DE102011118632B4; US9446338B2

Abstract

The invention relates to a filter part for fluid lines, preferably high-pressure lines with pressures in particular in the range of 150 to 900 bar, preferably 200 to 350 bar, particularly preferably 700 to 875 bar, for use preferably in filling nipples, non-return valves, pressure regulators, cylinder valves, filling couplings, control valves, break-off safety devices, quick couplings, the filter part also being usable as an independent filter element having a base body and at least one fluid opening, the base body and fluid opening being at least partially covered by a filter element, characterised in that the filter element is at least partially a filter sieve or a filter mesh with at least one filter layer having a mesh width in particular in the range of 0.1μm to 400μm, preferably 2μm to 100μm, particularly preferably 2μm to 40μm.

Description

Filter part for fluid lines

The invention relates to a filter part for fluid lines, preferably high-pressure lines with pressures in the range 150 to 900 bar, preferably in the range 200 to 350 bar, particularly preferably in the range 700 to 875 bar, in particular for use in filling nipples, check valves, pressure regulators, cylinder valves,

Filling couplings, switching valves, tear-off, quick couplings and as an independent filter part. The filter part comprises a base body and at least one fluid passage opening, wherein the base body and the fluid passage opening are covered by at least one filter element. Of

Furthermore, the invention relates to a method for producing a filter part with a base body and a filter element, in particular in the form of a

Filter screen, which is also referred to as Filtermesh. A filter part, in particular for use in filling nipples, with a base body and at least one fluid passage opening which is covered by a filter element, has become known from WO 02/00322 A1. In the filter part according to WO 02/00322 A1, the filter element has been made available from a tightly wound spring wire. The filter part known from WO 02/00322 A1 should essentially be a simple and resilient filter part for

Provide fluid lines available, which is suitable for filling nipples for fluids in particular for gaseous media, in particular for natural gas, with a

Filling pressure of 200 bar to be used. In particular, with WO 02/00322 A1, the disadvantages of filter parts should be avoided, in which the filter elements were designed as woven or metal mesh or the filter elements were perforated plates or sintered bodies with a defined porosity. In WO 02/00322 A1 filter elements, in particular metal mesh and metal mesh, as disadvantageous for use in Füllnippeln with filling pressures of up to 875 bar and more described because they are sensitive to pressure surges or alternating loads, which can lead to material fatigue. The known from WO 02/00322 A1 filter part was designed for use with filling pressures of 200 bar substantially for natural gas, however only conditionally for high pressures in the range 700 to 875 bar, which are necessary for a use of hydrogen with at the same time very high filter fineness.

From DE 1016138 A1, a controllable by means of a pressure of a fluid valve has become known, in which before the conical closing body an unspecified filter fabric is provided.

US 5,922,291 shows a reformer with a particulate filter, wherein the

Particulate filter is inserted into the reformate gas supply line and designed to be removable. This filter is turned off so that it can retain very fine dust particles carried by the reformate gas flow. At the gas outlet, in turn, a filter fabric is provided, which is designed as a fiber fleece.

From US 5,074,381 a device for removing substances from oil has become known, wherein the Aperatur as a filter screen comprises a polyester mesh, with openings of about 105pm, so that particles are held with a size> 0.0127 cm, while the oil through the polyester mesh is pressed.

The US 4,442,003 shows a filter assembly, in particular for the

Use of liquid Farbstoffzuführsystemen be used. The

Filter assembly serves to keep foreign particles from the spray nozzle. The filter according to US 4,442,003 comprises a replaceable filter, which is designed as a filter screen. Information on the filter mesh size and the filter structure is not made in US 4,442,003.

From US 2,068,858 a filter nipple is known, which in a

Gas line is introduced, in which gas is provided under high pressure is supplied to a gas consumer. The filter known from US 2,068,858 comprises a sieve of different shape and different mesh size. Information on the gas pressure and the mesh size is not made in US 2,068,858. US Pat. No. 1,644,121 also shows a sieve which is preferably used in a pump, preferably a centrifugal pump.

None of the aforementioned citations is known as a

Filter device designed for high pressures of up to 900bar and more, which are suitable for use with hydrogen at the same time

Consideration of very high filter fineness.

The object of the invention is thus to avoid the disadvantages of the prior art, in particular a filter part for fluid lines should be specified with the largest possible filter surface in the smallest space, while ensuring the optimum flow rate defined particle filter rate and minimal pressure drop. As a result, the filter surface is optimized for the required gas flow. According to the invention, this object is achieved by a filter part for fluid lines, for pressures in the range 150 to 900 bar, in particular in the range 200 to 350 bar, particularly preferably in the range 700 to 875 bar preferably for use in filling nipples check valves, pressure regulators cylinder valves,

Filling couplings, switching valves, tear-off, quick couplings and as an independent filter part, solved, wherein the filter part comprises:

a main body and at least one fluid passage opening, wherein

Base body and fluid opening are at least partially covered by a filter part, wherein the filter element at least partially comprises a filter screen, which is also referred to as a filter mesh with at least one filter layer, and the

Mesh size of the filter layer preferably in the range 0.1 μm to 400 μm,

in particular 2 μηη to 100 μητι, preferably 2 pm to 40 pm. The main body of the filter part according to the invention serves as a base and has a support function with respect to the filter screen, which is preferably a metal mesh. This ensures that the filter part can absorb pressure surges and loads.

In particular, the filter part of the invention is then both for pressures in

Range 200 bar to 350 bar, as it occurs in natural gas as well as in the range 700 to 875 bar as it occurs in hydrogen suitable. By the invention Construction with body and arranged above Filtermesh or filter network resistance to pressure surges and alternating loads is provided, even at high pressures in the range 700 to 875 bar, ie in

Pressure range, as it occurs in hydrogen. Also pressures up to 900bar and more are possible.

Another advantage of the arrangement according to the invention is the replaceability in a wide temperature range of -40 ° C to 120 ° C, preferably from -40 ° C to 85 ° C. The filter component according to the invention is further characterized by a high filter fineness combined with a compact design, very good pressure resistance and high flow rates. In particular, resistance to

Differential pressures and punctures of up to 900bar before. In a particularly preferred embodiment, the filter screen with the main body is not detachable, in particular by a welded joint, connected.

Through this cohesive connection, a particularly high hold between the base body and the filter element is made to change loads and

Withstand pressure surges up to 900bar.

It is particularly preferred if the filter screen or filter mesh comprises at least two filter layers arranged one above the other, in particular three and more filter layers arranged one above the other. The superposition of filter layers has the advantage that z. B. layers with different filter mesh sizes can be arranged one above the other, for example, the mesh size of the filter layers decreases from the main body forth to the outside, or vice versa. Also, the filter layers may have different materials. By the

Design with multiple filter layers is achieved that initially z. B. in the first filter layer large particles are retained in the following, slightly smaller and in the last filter layer, for example, very small Filter particles. Due to the multi-layer structure thus a very good filtering can be achieved. Another advantage is that z. B. in a three-layer structure, the first and third layers can essentially serve as a support fabric and the intermediate layer as the actual Filtermesh or filter. The layers used as a support fabric may have larger mesh sizes than the filter mesh, for example, mesh sizes greater than 400 μιη or at least greater than 100 μητι. The supporting fabric then serves for pre-filtering or increases the

Backwash and thus increases the life of the filter part on. It is particularly preferred if the base body of the filter part has a multiplicity of grooves which are in fluid-conducting connection with at least one central fluid line. Through the introduction of grooves fluid conduit channels or gas pockets are provided. Fluid is then passed through the filter mesh through the grooves from the filter mesh to the central fluid conduit. The introduction of grooves is advantageous, but by no means mandatory. It is even conceivable that the main body has no grooves, without departing from the invention.

It is particularly preferred if the grooves have a pitch which is preferably in the range 0.2 to 1.5 mm. Furthermore, the grooves have a depth which is preferably in the range 0.1 mm to 1 mm, in particular 0.3 mm. The grooves are preferably arranged circumferentially on the base body, and the distance between two adjacent grooves is preferably in the range of 0.2 mm to 1, 5 mm.

It is particularly preferred if the grooves open into the central fluid line via a collecting device, preferably a so-called fluid pocket.

Such a collecting device is preferred at several points of the

Main body, preferably on opposite sides, is arranged in order to achieve a high flow rate. Although you can even without fluid pockets

Flow can be achieved, but this is significantly increased by the fluid pockets. The main body has a shape, in particular a conical or a trapezoidal or cylindrical shape. Very particularly preferred is a conical shape on which the grooves rotate in a spiral.

As materials for the main body, but also for the individual filter layers, preferably materials which are H ₂ resistant, used, for example, stainless steels, especially those stainless steels with a high nickel content of about 12.5 to 17% wt .-%, preferably the steel 1.4404, 1.4435, 1.4306, 1.4401. Alternative materials are brass and aluminum. The cited materials are not limiting.

In addition to the filter part, the invention also provides a method for producing such a filter part. In a first step, first a base body and a filter element are provided. Then be

Main body and filter element processed and merged in a final process step to the filter part according to the invention. Here is the

Basic body first with a plurality of grooves and / or at least one central fluid line and / or at least one collecting device with a machining production process, in particular by a turning, milling and drilling or by chipless deformation such. As pressing, casting, edited. The last processing step of the base body is deburring, in particular by brushing, sandblasting, rubbing, explosion deburring, thermal deburring, chemical deburring, pressure fluid lapping. To

Processing of the base body, the filter element is arranged in the region of the grooves on the base body, and in particular with the base body

connected, for example by welding, in particular by

Resistance welding. The filter element itself can consist of several filter layers. If this is the case, then the individual filter layers are connected to each other before attaching the filter element to the base body, in particular for example by welding or sintering. The filter part according to the invention is preferably used in fluid lines, in particular, such Filter parts in valve components as described in WO 2009/015900 A1, whose disclosure content fully in the present application with

is used. In WO 2009/015900 A1, the filter part according to the invention replaces the filter insert 9 with a conical outer shape which is not specified in WO 2009/015900 A1 or is a filter insert according to WO 02/00322 A1.

The invention will be described below with reference to the embodiments without

Restriction will be described.

Show it:

1a-1b a basic body with filter mesh or filter screen arranged thereon; FIGS. 2a-2c show a base body after machining with introduced grooves as well as introduced fluid line and gas pocket;

Fig. 3 section through a base body with arranged thereon

Filter mesh or filter screen.

In FIGS. 1a-1b, a base body 10 with a filter mesh or filter screen 30 arranged thereon is shown showing the filter part 1. In Figure 3, the filter part 1 for a fluid line, preferably a high-pressure line, in particular for pressures in the range 150 to 900 bar, in particular in the range 200 to 350 bar, preferably in the range 700 to 875 bar shown in section. The filter part 1, as shown in Figure 3 in

Section shown in full, z. B. in a filling nipple (not shown) can be used. The use of such a filter insert in a valve component in the form of a connecting nipple or filling nipple is shown in WO 2009/015900 A1, the disclosure content of which is fully incorporated into the present application. Other applications z. B. in a check valve, a pressure regulator, flat valves, filling couplings, switching valves, Abreißsicherungen, quick couplings and as a stand-alone Filter element is included as possible and without reference to the disclosure.

The main body 10 of the filter part 1 has two sections, a first section 12, which has a substantially cylindrical shape and a second section 14 with a conical or tapered outer shape. The substantially cylindrical portion is such. As described in WO 2009/15900 A1, in direct connection to a sealing sleeve, which is held inside a connection nipple according to WO 2009/015900, the

Revelatory content in the present application fully with

whereas the conical section extends close to a sealing ring in the valve component according to WO 2009/015900 A1. As a result, as described in WO 2009 / 015900A1, a pressure-tight connection is provided. The filter mesh or filter screen 30 in the present embodiment is always above the front, d. H. the second conical section 14 is arranged.

A side view of the main body is shown in FIG. 1b. The same components as in Figure 1a are provided with the same reference numerals, in particular, a portion of the Filtermeshes or filter screen 30 is shown.

In Figures 2a to 2b, the base body after insertion of the grooves and before connecting the filter element in the form of a filter screen with the grooved base body is shown.

The same components as in Figures 1a to 1b and Fig. 3 are assigned the same reference numerals.

It can be clearly seen that the conical part 14 of the main body comprises the grooves, the gas pockets and the fluid line (s). These are particularly by machining processes, in particular by a turning, milling or drilling or by non-cutting deformation such. As pressing, pouring brought in. After the introduction of the grooves, gas pockets and

Fluid line is the last processing step for the main body of the deburring, in particular by brushing, sandblasting, rubbing, explosion deburring, thermal deburring, Druckfließläppen.

The individual grooves have a certain depth T, which is preferably in the range 0.1 mm to 1 mm, in particular 0.3 mm to 0.4 mm.

The distance A of two adjacent circumferential grooves 20.1, 20.2 is 0.2 mm to 1, 5 mm, the pitch of the grooves is in the range of 0.2 mm to 1, 5 mm, in particular in the range 0.5 mm to 0.6 mm.

All of the grooves 20 open into a collection device 22 which runs in the longitudinal direction of the conical region and which in the present case is designed as a so-called fluid pocket or gas pocket. In the region of the fluid pocket, an opening 24 is introduced, which opens into the central fluid line. Due to the design of the collecting device as fluid pockets, the flow of the fluid

especially the gas can be significantly increased. The filter element or

Filter part is usually flowed from the outside, d. H. the fluid passes through the Filtermesh or the filter screen, the grooves 20, the collector 22 and

Fluid pocket to the central fluid line 26 and manifold.

A side view of the main body 10 with introduced grooves 20 is shown in FIG. 2b. The same components as in Figure 2a are assigned the same reference numerals.

Clearly visible is the fluid pocket 22, which is in fluid communication with each of the grooves 20.

A section along the section line A-A in Figure 2b shows Figure 2c. Again, the same components are assigned the same reference numerals. Clearly visible are the individual grooves 20 which surround the substantially conical region of the

Rotate body and the central fluid line 26, the openings 24th in a fluid pocket 22 (in Figure 2b) opens and from there into the individual of the circumferential grooves 20th

Finally, in FIG. 3, the entire filter part 1 according to the invention is shown in section. FIG. 3 shows a basic body 10 with a substantially

Cylindrical section 12 and a substantially conical section 14. Clearly visible in Figure 3, the central fluid line 26, the opening 25 of the fluid line in the fluid pocket (s), not shown in Figure 3, in which the fluid from each of the individual grooves 20, which were inserted into the conical part of the body 10, flows. Above the individual grooves 20, the filter element 30 in the form of a filter screen or filter mesh with a total of three filter layers 32.1, 32.2, 32.3 in the present embodiment without

Restriction shown. The design of the filter screen or filter mesh with three filter layers 32.1, 32.2, 32.3, as shown in FIG. 3, is merely an example. Of course, a filter mesh or filter screen 30 would be possible with a single filter layer. Preferably, the filter mesh or filter screen 30 is produced with a plurality of filter layers before attachment to the conical portion 14 of the base body, for example, by the fact that the three different filter layers 32.1, 32.2, 32.3 are joined together by welding, in particular resistance welding. Alternatively to welding the

Different filter layers can also be used for other connection options, eg. B. gluing. In one embodiment of the invention, the different filter layers 32.1, 32.2, 32.3 different

Filter mesh sizes have. As a result, for example, the pressure drop across the filter mesh can be reduced because different particles are retained in each layer. It is also possible that the first filter layer 32.1 is a support layer, the second layer 32.2 is the filter mesh or filter screen and the third layer 32.3 is again a support layer. The support layer can be a larger

Mesh size as the Filtermesh or filter screen have. This pre-filtering is achieved and increases the backwash, resulting in a higher

Lifespan leads. It is also possible that the individual layers

have different materials. The connection of the filter mesh or filter screen 30 with the conical section 14 of the essentially conical basic body takes place in the peripheral areas 34.1, 34.2. The connection technique can in turn be welding, preferably resistance welding of filter screen or filter mesh with the conical base body. Other joining techniques such as gluing would be possible.

Clearly visible in FIG. 3 is also the depth T of the individual grooves and the distances A between adjacent grooves which are measured from the center of one groove 20.1 to the middle of the other groove 20.2.

The flow of the gas is also shown in FIG. The gas flows from the outside in the direction of 100 through the filter mesh 30 in the individual grooves 22 and there through the opening 24 in the central line 26th

In addition to welding the various filter layers 32.1, 32.2 and 32.3, which may have different materials and / or different filter mesh sizes, this can also be done by sintering.

The Filtermaschenweiten are preferably in the range 0.1 μιη to 400 μιτι ,, in particular in the range 2 μηη to 100 m, most preferably 2 μηη to 40 μητι. Alternatively, the Filtermaschenweite in the range 0.1 μιη to 400 μιτι, preferably 2 μητι to 100 μηη, more preferably 5 μιη to 100 μηη, more preferably 5 μιη to 20 μηι lie

The connection of the filter mesh 30 with the tapered portion 14 of the body takes place after cutting the Filtermeshs or filter screen 30 on the geometric shape or the conical shape by resistance welding to the body. It is particularly preferred if the filter screen or filter mesh is applied as Filterhütchen all at once on the base body after the Filterhütchen was formed from a blank, wherein the blank was welded to a longitudinal seam.

As clearly shown in Figure 3, is an essential function of

Base body a support function against the filter screen or filter mesh.

In addition, the main body forms a support body for the housing seal. By the passage of the gas or fluid through the grooves in the fluid pocket and through the opening 24, which is formed as a flow bore, to the central conduit 26 is an optimal gas flow or fluid flow over the entire

Guaranteed surface of the filter. In contrast to WO 02/00322 A1, with the embodiment according to the invention of a filter part in which a filter screen or filter mesh is used instead of a wound wire, a very large filter area is provided in a small installation space. Furthermore, the filter surface can be optimized by the multilayer structure the required gas flow, both in terms of the mesh sizes and the filter mesh sizes as well as the materials

Filter parts with body and arranged above filter or filter mesh sufficient resistance of the filter part against pressure surges and

Alternating loads also for pressures in the range 700 bar to 875 bar

Provided. Even pressures up to 900bar and more are possible.

Another advantage of the embodiment of the invention is the applicability in a wide temperature range of -40 ° C to 120 ° C, preferably from -40 ° C to 85 ° C. This includes aspects that are set out in subsequent sentences, that are descriptive but not claims

sentences

Filter part (1) for fluid lines, preferably high-pressure lines with pressures in the range in particular 150 to 900 bar, preferably 200 to 350 bar, particularly preferably 700 bar to 875 bar,

preferred for use with filling nipples, check valves, pressure regulators, cylinder valves, filling couplings, switching valves, anti-tampering, quick couplings and as an independent filter element with

a base body (10) and at least one fluid opening, wherein

Main body (10) and fluid opening at least partially from one

Filter element is covered,

characterized in that

the filter element at least partially a filter screen or a filter mesh (30) with at least one filter layer (32. 32.2, 32.3) with a

Mesh size in particular in the range of 0.1 pm to 400 μητι, preferably 2 μιτι to 100 pm, more preferably 2 pm to 40 pm.

Filter part (1) according to sentence 1,

characterized in that

the filter screen or filter mesh (30) comprises at least two filter layers (32.1, 32.2, 32.3) arranged one above the other, in particular three and more filter layers arranged one above the other.

Filter part according to sentence 1 or 2,

characterized in that

the body (10) has a plurality of grooves (20) in fluid communication with at least one central fluid conduit (26). Filter part according to sentence 3,

characterized in that

the grooves (20) have at least one pitch, wherein the pitch is preferably in the range 0.2 mm to 1, 5 mm and / or the grooves have a depth (r), wherein the depth preferably in the range 0.1 mm to 1 mm is located.

Filter part according to one of the sentences 3 to 4,

characterized in that

the grooves (20) are circumferential grooves, preferably in a spiral shape, and adjacent grooves are at a distance from one another, preferably in the range from 0.2 mm to 1.5 mm.

Filter part according to one of the sentences 3 to 5,

characterized in that

the base body (10) has at least one collecting device for collecting fluid from the multiplicity of grooves, in particular in the form of a fluid pocket (22) introduced into the basic body.

Filter part according to one of the sentences 1 to 6,

characterized in that

the base body (10) in particular at least partially has a conical, trapezoidal or cylindrical shape.

Filter part according to one of the sentences 1 to 7,

characterized in that

the base body (10) consists of one of the following materials: a H ₂ -resistant material;

a stainless steel, in particular a stainless steel with a high nickel content of preferably 12.5 wt .-% to 17 wt .-%, most preferably a stainless steel 1.4404, 1.4435, 1.4306, 1.4401;

Brass; Aluminum.

Method for producing a filter part (1), in particular according to one of claims 1 to 7, wherein a base body and a filter element are provided, with the following steps:

the base body (10) is provided with a plurality of grooves (20) and / or preferably at least one central fluid line (26) and / or at least one collecting device (22) with at least;

a machining production process, in particular a turning, milling and drilling; or by

non-cutting deformation, in particular pressing, casting provided; Deburring, in particular by brushing, sandblasting, rubbing, explosion burring, thermal deburring, chemical deburring; at least over a part of the processed basic body (10), in particular in the region of the grooves, the filter over the

Base body (10), preferably arranged as a filter mesh or filter screen (30), in particular with the base body (10) preferably by welding, in particular resistance welding, connected.

Procedure according to sentence 9,

characterized in that

the filter screen or filter mesh (30) comprises a plurality of filter layers (32.1, 32.2, 32.3), wherein the filter layers (32.1, 32.2, 32.3) are connected to one another, in particular by welding or sintering.

Claims

claims

1. filter part (1) for pressures in the range in particular 150 to 900 bar, a base body (10) and at least one fluid port, wherein

Main body (10) and fluid opening at least partially from one

Filter element is covered,

characterized in that

the filter element at least partially a filter screen or a filter mesh (30) with at least one filter layer (32.1, 32.2, 32.3) with a

Mesh size is in particular in the range of 0.1 pm to 400 pm, preferably 2 pm to 100 pm, particularly preferably 2 pm to 40 pm.

2. Filter part according to claim 1, characterized in that the filter part is designed for pressures in the range 700bar to 875bar, wherein the

Main body in relation to the filter screen exercises a support function, such that a resistance to pressure surges and / or Wechelbelastungen is provided up to 900bar.

3. Filter part according to one of claims 1 to 2, characterized in that the filter screen (30) with the main body (10) is not detachably connected, in particular by a welded joint

4. Filter part according to one of claims 1 to 3,

characterized in that

the filter screen is a metal mesh.

5. Filter part (1) according to one of claims 1 to 4,

characterized in that

6. Filter part according to one of claims 1 to 5,

characterized in that

the body (10) has a plurality of grooves (20) in fluid communication with at least one central fluid conduit (26).

Filter part according to claim 6,

characterized in that

Filter part according to one of claims 6 to 7,

characterized in that

Filter part according to one of claims 1 to 8,

characterized in that

Filter part according to one of claims 1 to 9,

characterized in that

11. Filter part according to one of claims 1 to 10,

characterized in that

the base body (10) and / or the filter screen (30) and / or the filter layers (32.1, 32.2, 32.3) consists of one of the following materials:

a H ₂ -resistant material;

a stainless steel, in particular a stainless steel with a high nickel content of preferably 12.5 wt .-% to 17 wt .-%, most preferably one

Stainless steel 1.4404, 1.4435, 1.4306, 1.4401;

Brass;

Aluminum.

12. A method for producing a filter part (1), in particular according to one of claims 1 to 11, wherein a base body and a filter element is provided, with the following steps:

non-cutting deformation, in particular pressing, casting provided; Deburring, in particular by brushing, sandblasting, rubbing, explosion burring, thermal deburring, chemical deburring; at least over a part of the processed base body (10), in particular in the region of the grooves, the filter element is arranged above the base body (10), as a filter screen (30), and with the

Basic body (10) preferably by welding, in particular

Resistance welding, connected.

13. The method according to claim 12,

characterized in that

14. Use of a filter part according to one of claims 1 to 11,

- In fluid line, in particular high pressure lines

- for filling nipples, check valves, pressure regulators, cylinder valves,

Filling couplings, switching valves, tear-off, quick couplings and as an independent filter element with