CN110043701B

CN110043701B - Fluid line insert

Info

Publication number: CN110043701B
Application number: CN201910036758.3A
Authority: CN
Inventors: M.金特; F.迈尔; A.申韦格; J.维尔德
Original assignee: Hansgrohe SE
Current assignee: Hansgrohe SE
Priority date: 2018-01-15
Filing date: 2019-01-15
Publication date: 2021-01-12
Anticipated expiration: 2039-01-15
Also published as: CN110043701A; DE102018200530A1

Abstract

The invention relates to a fluid line insert having a cylindrical insert housing body (1) which contains a particle screen (3) and can be used in particular for sanitary fluid lines. In the case of the fluid line insert according to the invention, the cylindrical insert housing body (1) has a hollow-cylindrical screen section (2) forming a particle screen and a screen support structure (4) with one or more axial support webs (5) on the outer side of the screen section. Furthermore, the insert housing body comprises, in a first end region (1 a), a radially outwardly projecting sealing flange (7) integral with the screen section and/or the screen support structure, and/or, in a second end region (1 b), a backflow preventer or flow regulator receptacle (8) integral with the screen section and/or the screen support structure. For example for sanitary hose connections and water outlet fittings.

Description

Fluid line insert

Technical Field

The present invention relates to a fluid line insert with a cylindrical insert housing body (Einstatzgeh ä usek player) containing a particle screen and having particular application in hygiene technology. A fluid line insert is understood here to mean an insert which is designed to be inserted into a fluid line, wherein the fluid line can be, for example, a flexible or rigid hose line or a conduit line, or a fluid line in a fluid-conducting device, such as a housing of a sanitary fitting. The insert piece can be provided in particular for insertion into the fluid line at the connection section of the fluid line, i.e. at the end region thereof.

Background

Such fluid line inserts are used in various applications, in particular in sanitary engineering, for example as hose connection inserts for connecting hot and cold water hoses for sanitary water fittings, such as for example washbasin mixers and kitchen sink mixers, to building-side water supply connections, such as wall-side cold and hot water connections, angle valves, etc. In addition to the particle screen, a backflow preventer and/or a throughflow regulator, also called throughflow regulator or flow regulator, are usually provided. The particle screen prevents dirt from being washed in and the backflow preventer prevents undesirable hot-cold water-cross flow or otherwise undesirable water backflow. The fluid throughput can be influenced by means of a throughflow regulator. Additionally, in order to seal the hose connection, a seal is usually required.

The utility model DE 202016004959U 1 discloses a fluid line insert in the form of a hose connection insert of the type mentioned at the outset, wherein a cylindrical insert housing body is formed by a connection sleeve (Anschlussnippel) at the end face of which a sealing element is arranged, which comprises a support ring and an annular seal held thereon, wherein the support ring engages with an engagement region into a connection end of the sleeve. Inside the casing, a particle screen and a backflow preventer are accommodated one after the other in the direction of fluid flow.

A safety mechanism for a pressure-free mixer is known from DE 19701846C 2, in which a particle screen, a first and a second backflow preventer, and a flow regulator are arranged in succession in the flow direction in a cylindrical housing body. The housing body can be connected, with the interposition of a corresponding annular seal, on the one hand to the angle valve and, on the other hand, to a line leading to the mixer.

DE 10107247 a1 discloses a water line element with a tubular housing in which a backflow preventer is arranged movably in and against the direction of flow of the water and a particle screen connected upstream is arranged.

In the utility model DE 29703335U 1, a backflow preventer-particle screen combination is known, which comprises a backflow preventer and a particle screen that can be releasably connected thereto.

Disclosure of Invention

The object of the present invention is to provide a fluid line insert of the type mentioned in the introduction which has one or more advantageous inventive innovations in comparison with the prior art described above, in particular with regard to function, operating and/or manufacturing costs.

In the case of the fluid line insert according to the invention, the cylindrical insert housing body comprises a screen section of hollow cylinder forming a particle screen, and a screen support structure with one or more axial support tabs on the outer side of the screen section. The respective axial support webs extend completely in the axial direction or extend obliquely or circumferentially with an axial directional component along the entire axial length or only a part of the axial length of the screen section or the particle screen. The axial direction is defined by the axial direction or the longitudinal direction of the cylindrical insert housing body.

Advantageously, therefore, for the fluid line insert according to the invention, the particle screen is constructed as a corresponding section of the cylindrical insert housing body itself and does not need to be placed as a separate component on the insert housing body. Thus, the particle screen is not lost when transporting the fluid line insert or when installing or removing the fluid line for which the fluid line insert is provided.

The screen support structure stabilizes the screen section. Furthermore, since the screen support structure is located on the outer side of the screen section, the screen section can be used as a guide structure, if desired, for guiding a cylindrical insert housing body in a fluid line into which the insert housing body is fitted. In addition, in a corresponding design, the screen support structure may provide a radial free space between the particle screen and a pipe wall into which the fluid pipe insert is inserted, so that in operation fluid flowing through the fluid pipe insert can pass through the particle screen from the inside outwards or from the outside inwards in a radial direction.

According to one aspect of the invention, the insert housing body comprises a radially outwardly projecting sealing flange at the first end region. The sealing flange can here serve as a seal and is advantageously integral with the screen section and/or the screen support structure, which renders superfluous a separate sealing element which is here to be arranged on the insert housing body. Accordingly, the seal is not lost when the fluid line provided with the insert is mounted or dismounted. Since the sealing flange projects radially outward, it can optionally additionally assume a guiding function in the respective application for the guided retention of the insert housing body on the associated fluid line. For example, the sealing collar can be received or guided for this purpose in the case of a hose connection inside a union nut (Ü berwurfmutter), the inner diameter of which is substantially equal to the outer diameter of the sealing collar.

According to an additional or alternative aspect of the invention, the insert housing body comprises a backflow preventer or a flow regulator receptacle in the region of the second end. With this receptacle, it is possible to accommodate a backflow preventer or a throughflow regulator or a backflow preventer and throughflow regulator combination element on the insert housing body, which combination element, if required for this purpose, contains the backflow preventer function and the throughflow regulator function in combination in one component. Advantageously, the backflow preventer or flow regulator housing is integral with the screen section and/or the screen support structure. The backflow preventer or the flow regulator receptacle therefore also does not have to be prefabricated as a separate component and mounted on the insert housing body. Rather, it is an integral part of the insert housing body with the screen section and/or the screen support structure.

The construction of the sealing flange and/or the backflow preventer or the flow regulator receptacle integral with the screen section and/or the screen support structure has the advantages of the known manufacturing techniques for the different components of such an insert to be manufactured in one piece, in particular at low manufacturing and/or installation costs. It is possible to dispense with connecting means for connecting the sealing flange or the backflow preventer or the flow regulator housing with the adjoining component of the insert housing body. The integral construction of the insert assembly may also be beneficial for a compact form of construction of the insert.

In a development of the invention, the screen support structure comprises a plurality of support webs which are distributed in the circumferential direction of the insert housing body and which define a maximum outer diameter of the insert housing body which is constant in the axial direction at least in an axial partial region of the insert housing body. The screen support structure can thus in an advantageous manner fulfill the guiding function of the insert housing body if the insert is plugged into the associated fluid line, such as a hose end section. Since the fluid line can then abut in the region of the insert housing body against the screen support structure, which forms its largest outer diameter there, the insert housing body can be supported on the fluid line by the screen support structure.

In a refinement of the invention, the particle screen has a diameter which is constant or decreases continuously along the axial length of the particle screen in a direction away from the first end region. This is advantageous for the respective application in terms of the function of the particle screen and may also be advantageous in terms of manufacturing technology.

In a refinement of the invention, the insert housing body has an intermediate bottom which forms an end closure for the particle screen and is integral with the screen section and/or the screen support structure. Such an integrated design of the intermediate bottom can in turn have advantages in terms of production technology and, in addition, contribute to a reduction in the number of components required. The intermediate bottom may also contribute to the mechanical stability of the particle screen as an end closure of the particle screen.

In one embodiment of the invention, the backflow preventer or flow regulator receptacle is formed by an extension of the screen support structure which extends beyond the intermediate floor or, on the side of the intermediate floor facing away from the screen section, by a receptacle sleeve section of the insert housing body which is integral with the screen section and/or the screen support structure. This advantageously achieves a backflow preventer or a flow regulator receptacle in terms of function and production engineering.

In one embodiment of the invention, the insert housing body forms a fluid collection chamber between the particle screen and the backflow preventer or flow regulator receptacle, which adjoins the intermediate floor. Fluid flowing through different regions of the particulate screen may collect in the fluid collection chamber before it reaches the backflow preventer or flow regulator if it is arranged in the associated receptacle.

In a refinement of the invention, the insert housing body has an outer sealing ring groove in the axial region between the particle screen and the backflow preventer or flow regulator receptacle. In this way, corresponding sealing rings can be arranged if necessary.

In a development of the invention, the insert housing body itself is integrally formed in one piece, that is to say with its screen section and its screen support structure and its further optional components, such as sealing flanges and/or backflow preventers or flow regulator receptacles and/or intermediate bottoms and/or receptacle sleeve sections. This very particularly helps to reduce the number of components required for the fluid line insert. Depending on the geometry and material of the insert housing body, it can be produced, for example, using plastic injection molding technology or 3D printing technology.

In a refinement of the invention, at least the screen section, the screen support structure and the sealing flange are integrally formed from a plastics material. This also contributes to a reduction in the required components and can be produced as desired, advantageously using injection molding techniques or 3D printing techniques. The plastic material may be, for example, a Polyoxymethylene (POM) material.

Drawings

Advantageous embodiments of the invention are shown in the drawings and will be described in detail below in connection with other advantageous embodiments of the invention. Here:

FIG. 1 is a perspective view of a fluid line insert such as may be used as a hose connection insert;

FIG. 2 is a side view of the fluid line insert of FIG. 1;

FIG. 3 is a cross-sectional view taken along line III-III of FIG. 2;

FIG. 4 is a side view of the fluid line insert in the rotated position compared to FIG. 2, taken along direction IV of FIG. 6;

FIG. 5 is a top view of an end side of the fluid line insert;

FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 2;

FIG. 7 is a sectional view taken along line VII-VII of FIG. 5;

FIG. 8 is the view of FIG. 3 with the backflow preventer additionally disposed;

FIG. 9 is a cross-sectional view of a hose connector with a fluid line insert according to FIG. 8 installed therein; and is

Fig. 10 is the view of fig. 9 with a flow regulator disposed in the fluid line insert in place of the backflow prevention element.

Detailed Description

The fluid line insert shown in the various views and applications in these figures comprises a cylindrical insert housing body 1 having a hollow cylindrical screen section 2. The screen section 2 forms a particle screen 3, for which purpose it is expediently provided with a corresponding screen pattern, as is self-evident to the person skilled in the art, for example, and therefore not described in detail here, which itself can also be derived from the drawings, for example. Furthermore, the insert housing body 1 has a screen support structure 4 with one or more axial support tabs 5 on the outer side face 2a of the screen section 2. The axial direction passes through the longitudinal axis L of the cylindrical insert housing body 1_EIs specified.

The number, length and tendency of the support tabs 5 can be varied according to need and application. Preferably, a plurality of support tabs 5 are arranged distributed along the circumferential direction of the insert housing body 1, for example at angular intervals that are equally spaced in the circumferential direction of the insert housing body 1. In the example shown, four support webs 5 are provided at respective intervals of 90 °, in alternative designs the four support webs 5 are arranged at different angular intervals, or only one, two, three or more than four support webs 5 are arranged at identical or different circumferential angular intervals.

The respective axial support webs 5 extend on the outer side 2a of the screen section 2 with an axial direction component or completely in the axial direction, as in the example shown, or obliquely or intertwiningly with an additional circumferential direction component. The respective support tabs 5 may extend along the entire axial length of the screen section 2, or alternatively only a portion of the axial length of the screen section 2. In this case, when a plurality of support webs 5 are present, all support webs 5 can have the same axial extent, or at least two support webs 5 differ in their axial extent and/or at least two support webs 5 extend over different axial partial regions of the screen section 2. In the example shown, these support tabs 5 extend along the entire axial length of the screen section 2.

If the screen support structure 4 comprises a plurality of support webs 5, these can, in a corresponding design, define a maximum outer diameter a which is constant in the axial direction at least in an axial partial region of the insert housing body 1_DThis is the case, for example, in the embodiment shown. In an alternative design, the support webs 5 are designed such that the outer diameter of the insert housing body 1 changes continuously in the axial direction in this region and/or the outer dimensions of the support webs 5 do not specify the maximum outer diameter of the insert housing body 1 in this region.

In a corresponding embodiment, the particle screen 3 has a diameter along its axial length which remains constant or decreases continuously in a direction away from the first end region 1a of the insert housing body 1. In the embodiment shown, the particle screen 3 has a diameter from the largest diameter D on its side facing the first end region 1a_SContinuously decreasing to a minimum diameter d on the other side thereof_SThe other side facing a second end region 1b of the insert housing body 1, which second end region faces away from the first endAnd (4) a region.

In a corresponding design, the insert housing body 1 has, for example in the example shown, preferably on the side facing the second end region 1b of the insert housing body 1 as in the example shown, an intermediate bottom 6 which is integral with the screen section 2 and/or the screen support structure 4 and forms an end closure of the particle screen 3. In the embodiment shown, the intermediate bottom 6 is constructed integrally with the screen section 3 and the screen support structure 4, and in alternative designs it is constructed integrally with only the screen section 3 or only the screen support structure 4.

In a corresponding embodiment, the insert housing body 1 has a sealing flange 7 projecting radially outward on its first end region 1 a. The sealing flange 7 is integral with the screen section 2 and/or the screen support structure 4. In the example shown, the sealing flange is manufactured integrally with both the screen section 2 and the screen support structure 4, in an alternative design it is manufactured integrally with only the screen section 2 or only the screen support structure 4.

In a corresponding embodiment, the insert housing body 1 has a backflow preventer or flow regulator receptacle 8 on its second end region 1 b. The backflow preventer or flow regulator housing 8 is integral with the screen section 2 and/or the screen support structure 4. In the example shown, the receptacle 8 is made integrally with both the screen section 2 and the screen support structure 4, in an alternative design it is made only with the screen section 2 or only with the screen support structure 4.

In a corresponding design, the backflow preventer or flow regulator receptacle 8 is formed by an extension of the screen support structure 4 which extends beyond the intermediate floor 6 or, as in the example shown, on the side of the intermediate floor 6 facing away from the screen section 2 by a receptacle sleeve section 9 of the insert housing body 1 which is integral with the screen section 2 and/or the screen support structure 4. In the embodiment shown, the receiving sleeve section 9 is manufactured integrally with both the screen section 2 and the screen support structure 4, in an alternative design it is manufactured integrally with only the screen section 2 or only the screen support structure 4.

In a corresponding design, as in the example shown, the insert housing body 1 forms a fluid collection chamber 10 between the particle screen 3 and the backflow preventer or flow regulator receptacle 8, wherein the fluid collection chamber 10 adjoins the intermediate floor 6. In an alternative design, such a fluid collection chamber may be omitted.

In a corresponding design, the insert housing body 1 has an outer sealing ring groove 11 in the axial region between the particle screen 3 and the backflow preventer or flow regulator receptacle 8, as shown. In an alternative design, no outer seal is provided in this axial region of the insert housing body 1.

In the corresponding embodiment, the insert housing body 1 is constructed in one piece, i.e. it consists of a single component which is produced by means of a suitable production method. This may be, for example, a plastic injection molding method, a metal casting method or a 3D-printing technique. In an alternative design, the insert housing body 1 is composed of a plurality of prefabricated components which are assembled together in order to provide the insert housing body.

In a corresponding embodiment, at least the screen section 2, the screen support structure 4 and the sealing flange 7 of the insert housing body 1 are integrally constructed of a plastic material. For the production of the integral structural unit, for example, plastic injection molding methods or 3D printing techniques are available. The material may be, for example, a POM material or the like. In a corresponding design, one, more or all of the other components of the insert housing body 1 are constructed integrally with the screen sections 2, the screen support structures 4 and the sealing flanges 7, in an alternative design these other components are realized as separate prefabricated components which are then assembled into the insert housing body in a corresponding mounting process.

In order to produce the insert housing body 1 in its entirety or at least integrally with the screen segments 2, the screen support structures 4 and the sealing flange 7 by means of a plastic injection molding method, the design of the relevant components is selected such that a demolding process which is as simple and trouble-free as possible can be achieved, as is obvious to the person skilled in the art, for example. The following measures may for example help to this: that is, the particle screen 3 as described has a diameter that remains constant or decreases continuously along its axial length in a direction from the first end region 1a to the second end region 1b of the insert housing body 1.

Fig. 8 shows the fluid line insert of fig. 1 to 7 with the backflow preventer 12 inserted into the backflow preventer or flow regulator housing 8. In the example shown, the backflow preventer 12 comprises, in a manner usual per se, a check valve assembly with: a valve seat sleeve 13 that penetrates and is open at one end; a valve closing body 14 guided axially displaceably in the valve seat sleeve, on which an O-ring is held as a valve seal 15; and a check valve spring 16 which pretensions the valve closing body 14 into its closed position shown in fig. 8. The associated O-ring seal 17 is placed in the seal groove 11 on the outside of the insert housing body 1.

In a corresponding design, the backflow preventer 12 is held in the backflow preventer or flow regulator receptacle 8 on the inner wall of the receptacle sleeve section 9 with a friction fit and/or, as shown, by means of one or more snap-in or snap-

lock connections

24, 25. Alternatively, it can also be only loosely connected.

Fig. 9 shows the fluid line insert of fig. 8 fitted with a backflow preventer 12 in the installed state, in which it is inserted into a hose connection, as it is used, for example, for guiding water to sanitary fittings, such as mixing fittings for wash basins, kitchen sinks or the like. The hose connection, into which the fluid line insert can be inserted, is thus a fluid line which comprises a fluid-conducting connection piece (anshlussstutzen) 18, which can be, for example, a wall-side pipe connection piece of a building-side water connection, or a connection piece of a conventional angle valve, etc., and a connection end region 19a of a hose 19, which leads, for example, to a mixing fitting. The connecting end region 19a can be, for example, a conventional connecting end sleeve, to which the plastic hose line of the hose 19 is plugged and held in a manner known per se and therefore not shown here.

The fluid line insert, which in this case thus serves as a hose connection insert, engages with its insert housing body 1 into the connection end region 19a of the hose 19, wherein the fluid line insert with its sealing flange 7 is located between the end of the connection piece 18 and an end-side annular flange (Ringflansch) 20 of the connection end region 19a of the hose 19. The union nut 21 is supported on a shoulder of the connecting end region 19a formed by the annular flange 20 and is screwed internally onto the external thread of the connecting stub 18, whereby the sealing collar 7 is held sealingly clamped between the annular flange 20 and the end of the connecting stub 18.

Outer diameter A of the insert housing body 1_DIn its section outside the sealing flange 7, i.e. in particular in its screen section 2 or its screen support structure 4 and its region accommodating the sleeve section 8, is substantially equal to the net (frei) inner diameter of the connecting end region 19a of the hose 19, so that the insert housing body 1 is guided in the connecting end region 19a in the radial direction to a certain extent without play. As an additional radial guide, the outer diameter of the sealing collar 7 can be equal to the clear inner diameter of the union nut 21. In the axial direction, the insert housing body 1 is held without play by pressing its sealing collar 7 between the end of the connecting stub 18 and the annular flange 20 of the connecting end region 19 a. Additionally, the insert housing body 1 can optionally be supported axially on an annular projection (Ringabsatz) 22 with a backflow preventer 12 or its seat sleeve 13 inside the connection end region 19a at its other end as shown. This then also holds the backflow preventer 12 in its receptacle 8 in the axial direction reliably, if it is only loosely inserted into the receptacle.

In operation, the fluid supplied via the connecting stub 18 is in the fluid flow direction F_SUp through the insert housing body 1 into the hose 19. The fluid enters the particle filter 3 at the end, flows radially outward through the particle filter, or flows through the intermediate bottom 6 and collects in the latterThe fluid collects in the chamber 10 and from there through the backflow preventer 12 continues into the hose 19, wherein the fluid presses the valve closing body 14 into its open position by its fluid pressure in the chamber 10 against the force of the check valve spring 16.

In this case, the respective section of the connection end region 19a of the hose 19 serves as a closed outer radial limitation for the fluid flowing radially outward through the particle screen 3, which thus enters the particle screen 3, the intermediate space between the connection end region 19a of the hose 19 and the support webs 5 of the screen support structure 4 and from there continues into the fluid collection chamber 10. The O-ring seal 17 ensures that these intermediate spaces are sealed off so that no fluid can flow through them radially outside the backflow preventer 12.

Fig. 10 shows a hose connection which corresponds to fig. 9, with the only difference that instead of being equipped with a backflow preventer 12, a fluid line insert or hose connection insert is equipped with a flow regulator 23 which, instead of the backflow preventer 12, is inserted into the backflow preventer or flow regulator receptacle 8 of the insert housing body 1. The flow regulator 23 is of a conventional construction type and therefore need not be described in detail here. The flow regulator is in turn preferably held in the backflow preventer or flow regulator receptacle 8 in a friction-fit and/or snap-in manner and is supported axially on the annular projection 22 inside the connecting end region 19a of the hose 19. Furthermore, the same features, functions and advantages as described above for the hose connector of fig. 9 apply to the hose connector of fig. 10, wherein reference can be made to fig. 9.

In an alternative design of the fluid line insert, the backflow preventer or the flow regulator receptacle 8 of the insert housing body 1, i.e. the backflow preventer and the flow regulator combination element, which contains both functions integrally in one component, is inserted into the fluid line insert.

The fluid line insert described above in the different embodiments and shown in the application of the hose connection can alternatively also be used as an insert for another fluid line, for example for another line section of a hose or for a rigid line in a connecting section or a line section remote from the connection or for a line section in a housing of a fluid-conducting device, such as a sanitary fitting. For example, the fluid line insert according to the invention can be used in sanitary outlet fittings, such as wash-stands or kitchen sink-mixer fittings. Advantageously, the fluid line insert can be inserted, for example, into a line section leading from the mixing tube to the water outlet (Wasserauslauf) in or on the housing of such a mixing fitting.

As is evident from the embodiments shown and otherwise mentioned above, the invention provides a fluid line insert for use which has advantageous novelty over the prior art, in particular in terms of function, operation and/or manufacturing costs, and which is suitable both for hygienic use and for any non-hygienic use or the like, in particular everywhere: the fluid line is provided with a particle screen or the line connection is connected to the counter-piece using an insert with a particle screen.

Claims

1. A fluid line insert, comprising:

-a cylindrical insert housing body (1) having a screen section (2) of hollow cylindrical type forming a particle screen (3) and a screen support structure (4) having one or more axial support tabs (5) on the outer side (2 a) of the screen section,

-wherein the insert housing body has a radially outwardly protruding sealing flange (7) on a first end region (1 a) integral with the screen section and/or the screen support structure, and/or,

-wherein the insert housing body has a backflow preventer or flow regulator housing (8) on a second end region (1 b) integral with the screen section and/or the screen support structure.

2. The method of claim 1Wherein a plurality of support tabs are arranged distributed in the circumferential direction of the insert housing body and specify a maximum outer diameter (A) of the insert housing body which is constant in the axial direction at least in an axial partial region of the insert housing body_D）。

3. The fluid line insert of claim 1, wherein the particulate screen has a diameter along its axial length that remains constant or continuously decreases in a direction away from the first end region.

4. A fluid line insert as claimed in claim 1 wherein the insert housing body has an intermediate bottom (6) integral with the screen section and/or the screen support structure, the intermediate bottom forming an end closure for the particulate screen.

5. A fluid line insert as claimed in claim 4, wherein the backflow preventer or flow regulator housing is constituted by an extension of the screen support structure extending beyond the intermediate bottom or, on the side of the intermediate bottom facing away from the screen section, by a housing sleeve section (9) of the insert housing body which is integral with the screen section and/or the screen support structure.

6. The fluid line insert of claim 4, wherein the insert housing body forms a fluid collection chamber (10) between the particulate screen and the backflow preventer or flow regulator housing, contiguous with the intermediate bottom.

7. A fluid line insert as claimed in claim 1, wherein the insert housing body has an outer sealing ring groove (11) in an axial region between the particle screen and the backflow preventer or flow regulator housing.

8. The fluid line insert of claim 1, wherein the insert housing body is integrally constructed.

9. The fluid line insert of claim 1, wherein at least the screen section, the screen support structure and the sealing flange are integrally constructed of a plastic material.

10. The fluid line insert of claim 1, wherein the fluid line insert is used to sanitize a fluid line.