KR20180043436A - Receptacle filter for high-pressure hydrogen - Google Patents

Abstract

The present invention relates to a receptacle filter for high pressure hydrogen filling, and more specifically, to a receptacle filter for high pressure hydrogen filling for preventing foreign substances from entering by filtering foreign substances contained in high pressure hydrogen. According to the present invention, the receptacle filter for high pressure hydrogen filling comprises: a filter portion; and a check valve portion.

Description

[0001] Receptacle filter for high-pressure hydrogen [

The present invention relates to a high-pressure hydrogen-filled receptacle filter, and more particularly, to a high-pressure hydrogen-filled receptacle filter that prevents foreign matter contained in high-pressure hydrogen from being filtered.

Typically, a fuel cell vehicle using hydrogen as fuel is equipped with one or more hydrogen tanks of 350 atmospheres or 700 atmospheres.

The hydrogen filling system for the hydrogen tank is a system for measuring the pressure in a pressure sensor included in a dispenser of a hydrogen filling station or a hydrogen tank and finishing the filling when the measured pressure reaches a target pressure.

A high-pressure hydrogen filling receptacle (Receptacle), which is a kind of connector, is used for filling the hydrogen tank with hydrogen, and a filter for filtering foreign substances contained in hydrogen to be charged is installed in the receptacle.

That is, the hydrogen storage system for filling and storing the high-pressure hydrogen has two filters arranged along the direction of filling the hydrogen, the first filter arranged along the direction of filling the hydrogen, And the other is a regulator filter arranged on the rear end side of the filter installed in the receptacle so as to filter foreign matter from flowing into the fuel cell stack.

That is, the filter installed in the receptacle is a filter having a fine pore structure of 40 to 50 탆, and when the high-pressure hydrogen is charged, foreign substances are first filtered in the hydrogen, and the regulator filter has a mesh structure of 10 탆 As a filter, when the pressure of the hydrogen is reduced to 350 bar by the regulator or 10 bar at 700 bar, it acts to filter foreign matter from entering the stack.

The conventional receptacle filter has a filter body portion 104 having a fluid passage opening portion 102 and a body portion 104 which covers the fluid passage opening portion 102 as shown in FIG. 6 attached to Korean Patent No. 10-790199. A filter (100) for a fluid pipe comprising a spring wire (106) that is a double layer mesh filter tube wound along a surface is disclosed.

There is a disadvantage in that the number of parts is large and the structure is complicated. In addition, there is a disadvantage in that the structure of the spring wire is complicated, Filtering is performed. However, since the hydrogen can pass smoothly through the fine gaps between the windings of the spring wire, there is a disadvantage in that the filtering performance against fine foreign substances is deteriorated.

As another example of the prior art, a filter having a structure in which a plurality of microholes are processed by passing through a filter body portion of a stainless steel (SUS) material has been released, but a large number of microholes can not properly filter fine foreign substances contained in hydrogen It has no limit.

Meanwhile, Korean Patent Registration No. 10-1113641 discloses a high-pressure hydrogen-filled receptacle filter employing a sintered metal filter in which a filter portion is bound through sintering as shown in FIG. 4 .

The receptacle filter equipped with such a sintered metal filter has an advantage of having excellent filtering performance in comparison with the filter in which the spring wire is wound around the filter body portion.

However, when the high-pressure hydrogen is filtered by adopting the sintered metal filter, the sintered metal filter is separated from the sintered metal filter in the filtration process of the high-pressure hydrogen to form a secondary pollutant, Since the metal powder has a base which can be mixed with high-pressure hydrogen, it may cause stability due to filtration of foreign matter and secondary problems as metal powder is mixed with high-pressure hydrogen.

KR 10-790199 B1 KR 10-1113641 B1 KR 10-2016-0087087 A

It is an object of the present invention, which is devised to solve the above problems, to propose and adopt a mesh filter capable of satisfying required performance while solving all the problems of a sintered type metal filter, Pressure hydrogen filling receptacle filter having a high durability.

The above object is achieved by the following constitutions provided in the present invention.

According to the present invention, there is provided a receptacle filter for high-

1. A high-pressure hydrogen-filled receptacle filter comprising: a filter portion for filtering foreign matters remaining in hydrogen; and a check valve portion for controlling one-way flow of hydrogen passing through the valve housing,

The filter unit includes: a filter support tube having a plurality of filtration slots formed in a side wall thereof; A hollow boss disposed at one side of the filter support tube for communicating the hollow portion inlet of the separated valve unit and the hollow portion outlet of the filter support tube; An end cap closing the inlet of the hollow portion of the filter support tube; And a mesh-filter-tubular body that is disposed in a state of being penetrated through an outer wall of the filter support tube and supports an inner diameter surface on an outer diameter surface of the filter support tube, and a wire mesh having a plurality of filter holes formed by weaving a metal wire, A filter unit,

And a filter housing that accommodates the filter unit to provide a supply path for high-pressure hydrogen requiring filtration.

Preferably, the multi-layer mesh filter tube is formed by laminating a plurality of wire meshes woven in a mesh shape of a metal wire in a concentric structure,

The high-pressure hydrogen introduced into the inner surface of the multi-layer mesh filter tube is configured to sequentially filter the filtration holes formed in the wire mesh stacked in a concentric structure to filter residual foreign matter.

More preferably, the multi-layer mesh filter is folded into 'C' shape, and the edges of the multi-layer mesh filter, which is bent and formed into a 'C' shape, are joined by a hardened epoxy resin.

As described above, in the present invention, the filter unit includes a multilayered mesh filter tube body in which a multilayered wire mesh is laminated and formed into a tubular body, and a filter support layer composed of a multilayer wire mesh is formed in a concentric structure.

Accordingly, the multi-layer mesh filter tube has a stable supporting force by a multi-layered wire mesh laminated in a concentric structure, and in particular, high-pressure hydrogen is stably filtered while allowing the filter balls formed in the respective wire meshes stacked to pass sequentially.

Particularly, in the present embodiment, after the multilayer wire mesh is laminated, the wire mesh is folded and formed into a 'C' shape. Then, in joining opposing edge sides, the edges are not joined through edge welding, , And an epoxy resin is applied so as to make the marginal edge.

Therefore, the multi-layered mesh filter tube is prevented from being thermally deformed by welding, so that the shape and diameter of the filter hole are deformed by thermal deformation, and the filtration rate of the high-pressure hydrogen is lowered.

1 is an exploded perspective view showing the overall configuration of a high-pressure hydrogen-filled receptacle filter of a high-pressure hydrogen-filled receptacle filter proposed as a preferred embodiment of the present invention,
FIG. 2 is a functional state diagram showing a filtration process of high-pressure hydrogen through a high-pressure hydrogen-filled receptacle filter of a high-pressure hydrogen-filled receptacle filter proposed in the preferred embodiment of the present invention,
FIG. 3 is an enlarged view of the filtration state of high-pressure hydrogen permeating through the multi-layer mesh filter tube in FIG. 2,
4 shows a sequential molding process of a multi-layered mesh filter tube in a high-pressure hydrogen-filled receptacle filter of a high-pressure hydrogen-filled receptacle filter proposed in the preferred embodiment of the present invention,
5 is a view showing an assembly state of a multi-layered mesh filter tube in a high-pressure hydrogen-filled receptacle filter of a high-pressure hydrogen filling receptacle filter proposed in the preferred embodiment of the present invention,
6 is a view showing a conventional high-pressure hydrogen filling receptacle filter of a high-pressure hydrogen filling receptacle filter.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a high-pressure hydrogen-filled receptacle filter according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view showing the entire configuration of a high-pressure hydrogen filling receptacle filter of a high-pressure hydrogen filling receptacle filter proposed as a preferred embodiment of the present invention. Fig. 2 is an exploded perspective view of a high- Pressure hydrogen through a high-pressure hydrogen-filled receptacle filter of a rechargeable receptacle filter. Fig. 3 is an operational view showing the filtration state of high-pressure hydrogen permeating through the multi-layer mesh filter tube in Fig. 4 is a view showing a sequential molding process of a multi-layer mesh filter tube in a high-pressure hydrogen filling receptacle filter of a high-pressure hydrogen filling receptacle filter proposed in the preferred embodiment of the present invention. FIG. Pressure hydrogen-filled receptacle filter proposed in the preferred embodiment of the present invention Hydrogen pressure in the charging receptacle for a filter, to show the assembled state of the multi-layer mesh filter tube.

1 and 2, the high-pressure hydrogen-filled receptacle filter 1 proposed in the preferred embodiment of the present invention comprises a filter unit 10 for filtering foreign substances remaining in high-pressure hydrogen, a valve housing 21 And a check valve unit 20 for controlling the one-way flow of the high-pressure hydrogen passing through the filter unit 10. The high-pressure hydrogen from which the foreign substance is removed by the filter unit 10 is supplied to the check valve (20).

The check valve unit 20 to which the high pressure hydrogen filtered by the filter unit 10 is supplied is generally composed of a check valve 22c including a ball 22c, a ball support 22a, and a spring 22b, Unit 22 and a valve housing 21 receiving the check valve unit 22 and connected in series with the filter housing 11 of the filter unit 10 to be described later.

The filter unit 20 for filtering the high-pressure hydrogen injected into the check valve unit 22 includes wire meshes M1, M2, M3 ... woven with wires as shown in Figs. 2 to 5, Layered mesh filter tube 15 formed by laminating and stacking a plurality of the mesh-shaped filter elements in a concentric structure, thereby exhibiting sufficient filtration performance and durability due to filtration of high-pressure hydrogen, and greatly reducing manufacturing costs.

1 and 2, the filter unit 10 according to the present invention includes a filter support tube 12 having a plurality of filtration slots 12a formed on an outer wall thereof; A hollow boss 13 disposed in front of the filter support pipe 12 for communicating the inlet of the check valve unit 20 spaced apart from the hollow support of the filter support pipe 22 with each other; An end cap (14) for closing the hollow inlet of the filter support tube (12); And a plurality of filter holes (15a) disposed on the outer surface of the filter support tube (12) to support the inner surface of the filter support tube (12) (15), and a filter housing (11) in which the filter unit is arranged to be accommodated.

The end portions of the filter housing 11 and the valve housing 21 constituting the check valve portion 20 are formed with corresponding fastening joints 11a and 21a so that the filter housing 11 and the valve housing 12 are joined together in series through fastening joints 11a, 21a to form a long receptacle housing.

3, the high-pressure hydrogen that flows into the filter housing 11 and moves to the valve housing 12 is transmitted to the inner diameter side from the outer diameter side of the multi-layer mesh filter tube 15 disposed in the filter housing 11, The foreign matter is filtered.

Particularly, in the present invention, a plurality of wire meshes M1, M2, M3... Formed by woven a metal wire into a mesh are not formed by expanding the wire mesh of the single-layer mesh tube 15, Layered mesh filter 15 ', and the foreign matter remaining in the high-pressure hydrogen is stably filtered by the respective filtration holes 15a formed between the stacked wire meshes M1, M2, M3, (M 1, M 2, M 3,...) Stacked in a concentric structure are mutually stably supported, and the shape is deformed by the filtration process of high-pressure hydrogen, while preventing the generation of secondary pollutants in the filtration process. Is prevented.

Particularly, in the present invention, the laminated wire meshes M1, M2, M3, ... are hot-pressed to mutually hot-melt the contact portions P between the wire meshes M1, M2, M3, Layer mesh filter 15 'in which the contact portion P is hot-pressed and fused, and the multi-layer mesh filter 15' forms a tubular body by joining the opposite side edges 15b and 15c.

According to the present invention, the laminated wire meshes M1, M2, M3,... Are connected to each other through a hot press mold 110 in which a heating plate is installed in a vacuum furnace maintained at a temperature of from 00 to 1150 DEG C Layer mesh filter 15 'which is hot-pressed at a pressure of 4TON to 6TON to form hot-pressed portions M of hot-pressed portions P formed between the wire meshes M1, M2, M3, .

The multi-layer mesh filter 15 ', in which the wires P are welded to each other through the hot press, is formed by stacking the wire meshes M1, M2, M3, M1, M2, M3, and so on, as well as the spacing between the stacked wire meshes M1, M2, M3, ... is minimized, so that improved filtration performance can be achieved, As a result, it has a sufficient filtration performance due to high-pressure hydrogen filtration.

In this embodiment, a wire mesh for filtration, in which relatively thin diameter wires are formed by weaving small diameter filter holes, is arranged at the bottom, and wires having a relatively large diameter are woven at the top of the wire mesh, The support wire mesh with the balls formed therein is placed.

Therefore, the multi-layered mesh filter tube body 15 in which the wire meshes M1, M2, M3, ... are formed by hot pressing the multi-layer mesh filter formed by hot pressing as shown in Fig. 3, A filter support layer made of a wire mesh M3 for support having a high strength and a large diameter of the filter hole is formed on the outer diameter side and a wire mesh for filtration having a relatively small strength and a narrow diameter of the filtration hole The filter support layers M1 and M2) are formed.

Thus, the high-pressure hydrogen flowing inward from the outside of the multi-layer mesh filter tube 15 through the filter housing 11 sequentially passes through the filter holes of the fused filter support layer. At this time, And filtered through filter support layers M1 and M2 having relatively small diameter filter holes.

FIG. 4 schematically shows a molding process of the multi-layer mesh filter tube proposed in the present invention,

In the present invention, the laminated wire meshes M1, M2, M3,... Are hot-pressed through a flat plate type hot press 110 as shown in FIG. 4A, M2, M3, ... are welded together for a year to form a planar multilayer mesh filter 15 '.

Then, as shown in FIG. 4D, the planar type multi-layer mesh filter 15 'is preliminarily molded into a' C 'type bend through bending, and then, as shown in FIG. 4E, The side edges 15b and 15c of the 'C' type multi-layer mesh filter 15 facing each other are welded to each other through the side surfaces 15b and 15c. It may be fixed.

However, in this embodiment, the epoxy resin is applied to the edges 15b and 15c of the crossed mesh filter 15 considering the occurrence of thermal deformation of the multi-layer mesh filter at the time of welding, and then the applied epoxy resin is hot- The edge sides 15b and 15c of the intersecting multilayered mesh filter 15 are joined and joined by the epoxy mold 15d in which the epoxy resin is hardened.

The thus formed multilayered mesh filter tube 15 is disposed so as to pass through the filter supporting tube 12. [

5, a hollow boss 13 and an end cap 14 are respectively disposed on one side and the other side of the filter supporting tube 12 on which the multilayered mesh filter body 15 is disposed to form a filter unit.

In this embodiment, a joint support ring 13a for supporting the front surface of the filter support pipe 12 is formed on the outer surface of the hollow boss 13, and a hollow portion 12b of the filter support pipe 12 is formed on the inner surface. Thereby forming an alignment rim 13b.

A joint support ring 14a for supporting the back surface of the filter support pipe 12 is formed to protrude from the outer surface of the end cap 14 and a hollow portion 12b of the filter support pipe 12 is formed on the inner surface. To form an alignment rim 14b.

Therefore, when the hollow boss and the end cap are respectively inserted into both ends of the filter support tube, the alignment rims formed on the hollow boss and the end cap are inserted into the support tube of the filter support tube, Both sides of the multi-layer mesh filter tube passing through the filter support tube are in contact with the alignment rim of the hollow boss and the alignment rim of the end cap.

In the present embodiment, epoxy resin is applied to these circumscribed portions, and the epoxy mold layer 15e, in which the epoxy resin is cured, forms an alignment rim of the hollow boss which is in contact with both side ends of the multilayered mesh filter tube body 15, So that it is sealed in the alignment rim.

The front surface of the multi-layer mesh filter body 15 is supported by a joint support ring 13a formed on the hollow boss 13 and the rear surface of the metal filter body 15 is supported by a joint support ring The front and back surfaces of the multi-layer mesh filter tube 15 are fixed to the respective supporting joint rings by edge welding or by adhesion of moldings 13c and 14c by epoxy resin.

Of course, it is also possible to form the filter support tube integrally with the hollow boss, or to integrally form the filter support tube with the end cap, which is also within the scope of the present invention.

A hollow boss 13 in which the alignment rim 13b enters the hollow portion 12b is disposed in front of the filter support pipe 12 passing through the multilayered mesh filter body 15 and the filter support pipe 12 An end cap 14 having an alignment rim 14b entered into the hollow portion 12b is disposed at the rear of the filter support tube 12 passing through the multilayer mesh filter body 15 so that the hollow boss 13 The end cap 14 forms a filter unit that is fixedly fixed.

2, the high-pressure hydrogen is gradually passed through each of the filtration holes 15a of the multi-layer mesh filter tube 15 formed in the filter unit, And the high-pressure hydrogen from which the foreign substance is removed is supplied to the check valve unit 20.

1. High-pressure hydrogen filling receptacle filter
10. The filter unit
11. Filter housing 12. Filter support tube
12a. Filtration slot 12b. Hollow portion
13. Hollow boss 13a joint support ring
13b. Alignment Rim 14. End Cap
14a. Joint support ring 14b. Alignment rim
20. Check Valve Section 21. Valve Housing
22. Check valve 22a. Ball support
22b. Spring 22c. ball

Claims (3)

1. A high-pressure hydrogen-filled receptacle filter comprising: a filter portion for filtering foreign matters remaining in hydrogen; and a check valve portion for controlling one-way flow of hydrogen passing through the valve housing,
The filter unit includes: a filter support tube having a plurality of filtration slots formed in a side wall thereof; A hollow boss disposed at one side of the filter support tube for communicating the hollow portion inlet of the separated valve unit and the hollow portion outlet of the filter support tube; An end cap closing the inlet of the hollow portion of the filter support tube; And a mesh-filter-tubular body that is disposed in a state of being penetrated through an outer wall of the filter support tube and supports an inner diameter surface on an outer diameter surface of the filter support tube, and a wire mesh having a plurality of filter holes formed by weaving a metal wire, A filter unit,
And a filter housing accommodating the filter unit to provide a supply path for high-pressure hydrogen requiring filtration. [2] The multi-layered mesh filter according to claim 1, wherein the multi-layer mesh filter tube comprises a plurality of wire meshes,
Wherein the high-pressure hydrogen flowing into the interior of the multi-layer mesh filter tube body is configured to sequentially filter the filtration holes formed in the wire meshes stacked in a concentric structure to filter residual foreign matter. . The multi-layered mesh filter according to claim 2, wherein the multi-layer mesh filter is formed by bending into a 'C' shape, and the edges of the multi-layer mesh filter folded and formed into a 'C' shape facing each other are joined by a hardened epoxy resin High-pressure hydrogen-filled receptacle filter.

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