solenoid valve

Abstract

The solenoid valve (100) includes: a housing (1) having an inlet (1a) and an outlet (1b) defining a flow path (11) through the solenoid valve (100) between the inlet and the outlet; a valve seat (12) disposed in the flow path (11); a valve piston including an armature (4) and a sealing body (6); a closing spring (5); a solenoid coil (2); and a yoke (1c). The solenoid coil (2) includes a coil body (2a) and a winding (2b). The solenoid valve (100) includes a load-bearing composite acting in the radial direction, which receives a nominal pressure present in the flow path (11). The radial expansion of the load-bearing composite is less than 200 μm and preferably less than 20 μm when receiving the nominal pressure.

Description

Technical Field

[0001] This invention relates to an electromagnetic valve. Background Technology

[0002] Solenoid valves are also known as electromagnetically controlled valves, or EBVs.

[0003] In fuel supply systems for gaseous fuels, such as natural gas or hydrogen, there is a storage pressure or nominal pressure up to approximately 700 bar on the high-pressure side and an operating pressure up to approximately 20 bar on the load side. The load side is also referred to as the low-pressure side. In such systems, solenoid valves are installed on both the high-pressure and low-pressure sides. These solenoid valves, for example, open and / or close the filling and / or draining paths. Opening and / or closing can be achieved by applying voltage to the individual solenoid valves or by disconnecting the voltage supply to the solenoid valves.

[0004] Solenoid valves known in the prior art include a housing and a shut-off system for closing or opening a flow path, within which the flow path extends. The shut-off system includes a solenoid coil for opening and / or closing the flow path by means of a change in the position of at least one component of the shut-off system. Solenoid valves according to the prior art are known, for example, from publications DE60102241T2 or EP2857727A1. DE60102241T2 discloses a solenoid valve arranged inside a container valve. The solenoid valve housing and solenoid coil extend into a high-pressure container and are subjected to fluid pressure on all sides inside the container. The solenoid coil is powered by a separately arranged, pressure-resistant, and pressure-sealed cable feeder that separates the pressureless external space from the pressure-loaded side of the container valve. Due to the pressure-sealed and pressure-resistant cable feeder, the housing is not pressure-resistant and is not pressure-sealed. A disadvantage of this prior art solenoid valve is its high structural cost for the cable feeder, which leads to high production costs. In addition, the required cable feeders need additional sealing areas on the cable feeders, which may form weak points and leaks may occur at these sealing areas.

[0005] EP2857727A1 discloses a solenoid valve arranged on the outside of a container valve, wherein the armature chamber and the inner side of the housing are subjected to fluid pressure, and the outer side of the housing, as well as the solenoid coil fitted onto the housing with a small clearance, are in contact with ambient air. Thus, the solenoid coil is not subjected to fluid pressure. The housing meets the requirements for compressive strength and sealing even without the solenoid coil installed. A disadvantage of this structure is that the housing is subjected to fluid pressure and therefore must be made pressure-resistant and airtight. This results in a wall thickness that ensures the material stresses present are absorbed by the housing under all operating conditions. It must be ensured that the housing does not deform to the point that it no longer fulfills its function. Such deformation is referred to as unacceptable deformation within the scope of this specification. This occurs, for example, when the housing, due to deformation, no longer guides the components arranged within it, and therefore the solenoid valve no longer opens and / or closes, fails to seal, or the housing breaks. Furthermore, in the case of hydrogen-containing fluids, the effects of hydrogen embrittlement must be considered when selecting materials. This would normally result in the housing being made of austenitic, non-magnetic material, thereby increasing the solenoid valve's power consumption, size, and weight. Summary of the Invention

[0006] The objective of this invention is to avoid, in particular, these disadvantages of the prior art by reducing the power consumption, weight, and size of the solenoid valve and by reducing the effects of hydrogen embrittlement.

[0007] According to the present invention, this task is solved by providing a solenoid valve.

[0008] The solenoid valve according to the invention comprises: a housing having an inlet and an outlet, defining a flow path through the solenoid valve between the inlet and the outlet; a valve seat disposed in the flow path; a valve piston including a magnetically conductive armature and a sealing body; a closing spring; an electromagnetic coil and a magnetically conductive yoke. The electromagnetic coil itself includes a coil body and windings.

[0009] The closing spring is configured to press the sealing body against the valve seat when the solenoid valve is closed, and the sealing body is configured to seal relative to the valve seat when the solenoid valve is closed. The solenoid coil is configured to move the armature by means of magnetic force.

[0010] According to the invention, the solenoid valve includes a load-bearing composite acting in the radial direction, the composite being composed of adjacent components, the composite being configured to receive a nominal pressure present in the flow path, wherein the radial expansion of the load-bearing composite is less than 200 μm and preferably less than 20 μm when receiving the nominal pressure.

[0011] The nominal pressure is a reference parameter used for pressure-loaded systems, particularly pipes and fittings. Nominal pressure represents the maximum reliable pressure. Fluid systems are designed with reference to pipe wall thickness and the dimensions of connections and interfaces in mind.

[0012] Preferably, the solenoid valve includes a sleeve disposed between the flow path and the solenoid coil. The sleeve contacts the fluid in the flow path and seals the winding relative to the flow path. The load-bearing composite herein includes a coil body and also includes at least one of the winding, yoke, and sleeve.

[0013] Preferably, the coil body is in contact with the fluid located in the flow path, and the coil body is sealed relative to the flow path, wherein the load-bearing composite includes the coil body and also includes at least one of a winding and a yoke.

[0014] Preferably, the solenoid valve includes a sleeve disposed between the flow path and the solenoid coil, wherein the sleeve is in contact with fluid located in the flow path and the sleeve is sealed relative to the flow path, wherein the load-bearing composite includes the sleeve and also includes at least one of a coil body, a winding, and a yoke.

[0015] Furthermore, the solenoid valve may be arranged sequentially between the sleeve and the solenoid coil in an axial direction that is substantially perpendicular to the radial direction, including a first magnetic flux guide, a non-magnetic intermediate member, and a second magnetic flux guide, wherein the sleeve is in contact with fluid located in the flow path and the sleeve is sealed relative to the flow path, wherein the load-bearing composite includes the sleeve and also includes at least one of a coil body, a winding, and a yoke, as well as a combination including the first magnetic flux guide, the intermediate member, and the second magnetic flux guide.

[0016] Furthermore, the solenoid valve according to the invention may include a support body, wherein the load-bearing composite includes the support body.

[0017] The electromagnetic coil preferably includes a filler material, wherein the load-bearing composite includes the filler material.

[0018] Preferably, the electromagnetic coil is sealed relative to the housing.

[0019] Furthermore, the housing is preferably sealed relative to the support, and / or the coil body is sealed relative to the yoke.

[0020] It is preferable to use at least one sealing element or a force-fitting connector for sealing.

[0021] An inner housing is arranged between the electromagnetic coil and the flow path, and the inner housing includes the sleeve.

[0022] Furthermore, the inner housing is preferably made of a non-magnetic material.

[0023] Furthermore, the housing includes a guide for supporting the armature, which is guided within the coil body of the electromagnetic coil. Alternatively, an inner housing may be arranged between the electromagnetic coil and the flow path, within which the armature is guided.

[0024] According to a preferred embodiment, the electromagnetic coil is preferably sealed relative to the housing by means of at least one seal. Furthermore, the electromagnetic coil and the housing are preferably connected by a force-fit connector, wherein the force-fit connector is preferably implemented as a fluid-tight seal. The advantage achieved by this is that no additional sealing material is required.

[0025] According to an alternative embodiment of the solenoid valve of the invention, an inner housing is arranged between the solenoid coil and the flow path. This avoids direct fluid contact between the solenoid coil and the fluid. This is particularly advantageous in the case of chemically corrosive fluids, as it prevents the solenoid coil from being corroded by the fluid. Preferably, the inner housing is made of a non-magnetic material. This prevents the magnetic field generated by the solenoid coil from being affected by the inner housing. Here, the inner housing preferably comes into contact with the fluid passing through the flow path.

[0026] According to a preferred embodiment, the electromagnetic coil is at least partially in contact with the fluid flowing through the flow path in the open and / or closed states.

[0027] Preferably, the housing is arranged within a support. Furthermore, it is preferable to have at least one seal between the housing and the support. The support may be, for example, part of a pressure vessel or pressure reservoir, or a component of a motor. According to a preferred embodiment, the housing is connected to the support by means of a force-fitting connector, wherein the force-fitting connector is preferably liquid-sealed.

[0028] According to a preferred embodiment, the electromagnetic coil includes a coil body, at least one winding, and a filling material, wherein the coil body is implemented as a single piece or multiple pieces, and is preferably made of a non-magnetic material.

[0029] Advantageously, the housing includes a guide for supporting the armature, which is guided within the coil body of the electromagnetic coil, or an inner housing is arranged between the electromagnetic coil and the flow path, within which the armature is guided. Thus, reliable opening and closing of the flow path can be achieved even under high pressure.

[0030] Preferably, the radial deformation of the coil body or inner housing when subjected to pressure by the nominal pressure present in the flow path is a maximum of 200 μm.

[0031] According to an alternative implementation variant, the inner housing includes a sleeve for guiding the armature.

[0032] This invention fully utilizes the stress-strain characteristics of each individual component of a hybrid structure within a load-bearing composite, determined by the stiffness of each component: high-stiffness components in the composite bear the load, are directly responsible for compressive strength, and should be made of materials insensitive to hydrogen embrittlement when in contact with hydrogen-containing fluids. Low-stiffness components in the composite do not bear loads or bear secondary loads and transfer forces to adjacent components; therefore, they are not directly responsible for compressive strength, and due to the low mechanical stress (tensile and compressive stress) upon contact with hydrogen-containing fluids, they can also be made of materials sensitive to hydrogen embrittlement.

[0033] According to one embodiment of the invention, the electromagnetic coil is fluid-loaded at least on the inner side of the coil facing the armature, or is protected from fluid influence by a preferably tubular sleeve of the inner housing, which is fluid-loaded on the inner side facing the armature. The various components of the electromagnetic coil, or the electromagnetic coil itself, regardless of whether it is in contact with the fluid or protected from fluid contact by the inner housing and thus not in contact with the fluid, are loaded with forces caused by pressure loading and transmit or absorb these forces, or a portion thereof, to other components.

[0034] To transmit the force, adjacent components are pressed against each other with a small clearance between them or with no clearance between them. The pressure-loaded space is sealed by a seal or by a force-fitting connector (e.g., a press fit).

[0035] The radial and optional axial compressive strength or sealing performance of the internally pressure-loaded and optionally externally pressure-loaded solenoid valves according to the present invention is achieved in the region of the solenoid coil using only one installed solenoid coil. That is, without the installation of a solenoid coil, the internally pressure-loaded and optionally externally pressure-loaded electromagnetically operated valves according to the present invention do not meet the requirements for radial and optional axial compressive strength and / or sealing performance in the region of the solenoid coil.

[0036] Because of the load-bearing electromagnetic coil or the load-bearing composite consisting of the electromagnetic coil and the housing, as well as the large-area support of the electromagnetic coil on the housing and the large-area support of the housing on the support body, the mechanical stress in the housing of the solenoid valve according to the present invention is smaller, thereby avoiding the negative effects of hydrogen embrittlement.

[0037] This invention can be used in directly or indirectly controlled solenoid valves regardless of the operating mode and is applicable to all types of directional valves, such as shut-off valves, flow control valves, or multi-way valves.

[0038] This invention has to date made full use of the unused components of the solenoid valve to ensure compressive strength and improve the functionality of the solenoid coil: in addition to affecting the position of the shut-off system, the solenoid coil also undertakes load acceptance and / or load transfer in the radial and optional axial directions.

[0039] This invention reduces the size and weight of the solenoid valve by expanding the functionality of the electromagnetic coil.

[0040] The present invention prevents unacceptable deformation of the guide armature component of the solenoid valve in the longitudinal direction of the valve in the region between the outer sides of the solenoid coil by extending the function of the solenoid coil. The permissible deformation is understood to be a radial extension of the guide armature component in the longitudinal region of the solenoid coil of less than 200 μm and preferably less than 20 μm.

[0041] This invention reduces hydrogen embrittlement of components in contact with hydrogen-containing fluids by altering the stress distribution.

[0042] This invention reduces the power consumption of the solenoid valve by possibly using magnetic materials and / or using a thin-walled internal housing due to changes in stress distribution.

[0043] This invention reduces the manual labor required to establish an electrical connection between the electromagnetic coil and the electrical plug by eliminating the electrical feeder located between them.

[0044] This invention reduces the overall cost of solenoid valves. Attached Figure Description

[0045] The solenoid valve according to the present invention and its alternative embodiments are described below with reference to the accompanying drawings.

[0046] Figure 1 A cross-sectional view of a solenoid valve according to a preferred embodiment is shown.

[0047] Figure 2 The solenoid valve according to the invention is shown in an alternative embodiment, having pressure ports on both sides and a solenoid coil that is not in contact with the fluid in the closed state.

[0048] Figure 3 Another alternative embodiment of the solenoid valve according to the invention is shown, which has a support body and the solenoid coil is in contact with the fluid in the closed state.

[0049] Figure 4 Another alternative embodiment of the solenoid valve according to the invention is shown, which has a support body and the solenoid coil is not in contact with the fluid in the closed state. Detailed Implementation

[0050] Figure 1 A solenoid valve 100 according to the invention is shown, which is used to connect pressure lines on both sides in the closed state. The solenoid valve has a multi-part housing 1 and a multi-part solenoid coil 2. The housing is preferably made of a magnetic material, i.e., a ferromagnetic or ferrimagnetic material, and the solenoid coil is preferably made of a non-magnetic material, i.e., an antimagnetic, paramagnetic, or antiferromagnetic material. Each surface of the housing 1 and the solenoid coil 2 is in contact with the fluid, and the housing 1 and the solenoid coil 2 ensure the sealing of the solenoid valve 100. The housing 1 includes an inlet 1a configured as an input-side pressure interface and an outlet 1b configured as an output-side pressure interface, and preferably includes a magnetic yoke 1c that serves as a threaded connection between the two pressure interfaces 1a and 1b and both sides. In the open state of the solenoid valve 100 according to the invention, fluid flows from the inlet 1 to the outlet 1b. A flow path 11 is defined between the inlet 1a and the outlet 1b, along which the fluid flows. An electromagnetic coil 2, consisting of a coil body 2a for accommodating a winding 2b, is arranged within the housing 1. The winding is preferably composed of multiple layers of conductive insulated wire and optionally a filler material 2c for completely filling the coil body 2a. The electromagnetic coil 2 is sealed relative to the adjacent portion of the housing 1 by at least one seal 3, preventing the winding 2b from contacting the fluid. A valve seat 12 is arranged in the flow path 11. Figure 1 The magnetic circuit, identified by flux lines MFL, includes a yoke 1c, an outlet 1b, an armature 4, and an inlet 1a. The armature 4 is axially movable within the coil body 2a and the outlet 1b with a small clearance. The inlet 1a functions as a counter pole in the magnetic circuit and receives a closing spring 5. A sealing body 6 seals relative to the outlet 1b. The solenoid valve 100 according to the invention includes a valve piston comprising an armature 4 and a sealing body 6. The sealing body 6 can be connected to the armature 4. Furthermore, the solenoid valve 100 includes a closing spring 5 and a solenoid coil 2, the closing spring being configured to hold the sealing body 6 within the solenoid valve 100. Figure 1 In the closed state, the solenoid coil 2 is pressed against the valve seat 12, or the sealing body 6 is lifted from the valve seat 12 in the open state of the solenoid valve 100. The solenoid coil is configured to move the armature 4 by means of magnetic force. The solenoid coil 2 is arranged at least partially adjacent to the flow path 11, either indirectly or directly, in at least one of the open and / or closed states. According to a variation of the invention, the solenoid coil 2 is at least partially in contact with the fluid flowing through the flow path 11 in at least one of the open and / or closed states. The solenoid coil 2 at least partially absorbs the pressure present in the flow path 11. The movement of the armature 4 is achieved by applying a voltage to the solenoid coil 2, thereby allowing the sealing body 6 to move between the open and closed states.

[0051] Figure 2An alternative embodiment of the solenoid valve 100 according to the invention in the closed state is shown, which has a housing 1 comprising a multi-piece inner housing 1d made of non-magnetic material and a multi-piece outer housing 1e composed of individual magnetic and non-magnetic components. Furthermore, according to... Figure 2 The solenoid valve includes a multi-piece solenoid coil 2 made of a non-magnetic material, wherein only the surfaces of the inner housing 1d are in contact with the fluid, and preferably only the inner housing 1d ensures the sealing of the solenoid valve 100. The inner housing 1d includes an inlet 1a as an input-side pressure interface, an outlet 1b as an output-side pressure interface, and a preferably tubular sleeve 1f connected thereto, which is sealed relative to the inlet 1a by a seal 3. The outer housing 1e includes: a magnetic yoke 1c and a first magnetic flux guide 1g connected thereto; an intermediate part 1h; and a second magnetic flux guide 1i, and the outer housing 1e connects the inlet 1a and the outlet 1b to threads on both sides. In the outer housing 1e, preferably only the intermediate part 1h is made of a non-magnetic material. The solenoid coil 2, consisting of a coil body 2a, a winding 2b, and optionally a filler material 2c, is arranged between the inner housing 1d and the outer housing 1e. The magnetic circuit, illustrated by flux lines MFL, includes a yoke 1c, a first flux guide 1g, an armature 4, a counter pole 7, and a second flux guide 1i. In this variant, the armature 4 receives a closing spring 5 and is axially guided with a small clearance on the inside of the sleeve 1f. The sleeve 1f receives the counter pole 7 and supports a non-axially movable counter pole 7 at one end of the sleeve 1f. The sealing body 6 seals relative to the outlet 1b.

[0052] Figure 3Another alternative embodiment of the solenoid valve 100 according to the invention is shown, the solenoid valve having a support 8 that at least partially surrounds a housing 1 in the closed state. The housing 1 is at least partially arranged within the support 8. According to this embodiment, the housing 1 is preferably made of a magnetic material. Furthermore, according to this embodiment, the solenoid valve 100 includes a multi-piece solenoid coil 2 made of a non-magnetic material, wherein the respective surfaces of the housing 1 and the solenoid coil 2 are in contact with a fluid, and the housing 1 and the solenoid coil 2 ensure the sealing of the solenoid valve 100. The support 8 includes a support outlet 8a on the output side and an orifice 8b for receiving the housing 1 of the solenoid valve 100, the solenoid valve having a valve seat 12 for sealing relative to a sealing body 6 of the solenoid valve 100. The outlet 1b of the housing 1 is arranged in the region of the support outlet 8b and is in fluid connection with the support outlet, the fluid connection being preferably interruptible by the sealing body 6 in the closed state of the solenoid valve 100. The support body 8 includes: a support surface for axially supporting the housing 1 on the support body 8; a guide surface for radially guiding the housing 1 within the support body 8; and a radial insertion portion for securing the housing 1 within the support body 8 using an elastic fixing element 9, which also compensates for manufacturing tolerances axially. The housing 1 includes a yoke 1c and a first magnetic flux guide 1g connected thereto. An electromagnetic coil 2 is disposed inside the housing 1 and the counter pole 7, the electromagnetic coil consisting of a coil body 2a for accommodating at least one winding 2b and optionally a filler material 2c. The electromagnetic coil 2 is sealed relative to the adjacent portions of the housing 1 and the counter pole 7 by a seal 3, such that the winding 2b does not come into contact with fluid. The magnetic circuit, represented by the flux lines MFL, includes the yoke 1c, the first magnetic flux guide 1g, the armature 4, and the counter pole 7. The armature 4 is axially movable with a small clearance on the inner side of the first magnetic flux guide 1g. The counter pole 9 functions as an inlet on the input side. The seal 6 seals relative to the support body 8. Preferably, at least one seal is arranged between the housing 1 and the support 8. Furthermore, the housing 1 is preferably connected to the support 8 by means of a force-fit connector, wherein the force-fit connector is preferably liquid-sealed. Additionally, the electromagnetic coil 2 and the housing 1 are preferably connected by means of a force-fit connector, which is preferably liquid-sealed.

[0053] Figure 4 Another alternative embodiment of the solenoid valve according to the invention is shown, which, in the closed state, has a support body 8 and a preferably multi-part inner housing 1d, the inner housing being arranged between the solenoid coil 2 and... Figure 4 The invisible flow path 11 is between the components, and it is preferably made of a non-magnetic material. Furthermore, in Figure 4The diagram shows a multi-piece outer housing 1e made of magnetic material and a multi-piece electromagnetic coil 2 made of preferably non-magnetic material. Preferably, only the surfaces of the inner housing 1d are in contact with the fluid passing through the flow path 11, and preferably only the inner housing 1d ensures the sealing of the solenoid valve 100. The support body 8 includes an inlet 8c on the inlet side, an outlet 8a on the outlet side, and a bore 8b for receiving the housing 1 of the solenoid valve 100, which has a valve seat 12 for sealing relative to the sealing body 6 of the solenoid valve 100. The outlet 1b of the housing 1 is arranged in the region of the outlet 8b of the support body and is in fluid connection with the outlet of the support body, which is preferably interruptible by the sealing body 6 in the closed state of the solenoid valve 100. Furthermore, the support body 8 includes a support surface for axially supporting the solenoid valve 100 on the support body 8, a guide surface for radially guiding the solenoid valve 100 in the support body 8, and a fixing thread for securing the solenoid valve 100 in the support body 8. The inner housing 1d includes a support member 1j sealed relative to the support body 8 by a seal 10, and a tubular sleeve 1f with a bottom 1k connected to the support member. The outer housing 1e includes a yoke 1c, a first flux guide 1g connected thereto, and a second flux guide 1i, and the inner housing 1d is pressed against the support body 1 by threads. An electromagnetic coil 2 is arranged between the inner housing 1d and the outer housing 1e, the electromagnetic coil consisting of a coil body 2a with an intermediate member 2d connected thereto, a winding 2b, and an optional filler material 2c. The magnetic circuit, represented by flux lines MFL, includes the yoke 1c, the second flux guide 1i, an armature 4, a counter pole 7, and the first flux guide 1g. The armature 4 is axially movable on the inside of the sleeve 1f with a small clearance. The sleeve 1f receives the counter pole 7 and supports the non-axially movable counter pole 7 on the bottom 1k by an internal closing spring 5. A seal 6 seals relative to the support body 8. Preferably, the housing 1 includes a guide for supporting the armature 4. Alternatively, the armature 4 can be guided within the coil body 2a of the electromagnetic coil 2. According to another alternative, an inner housing 1d can be arranged between the electromagnetic coil 2 and the flow path 11, wherein the armature 4 is guided within the inner housing 1d.

[0054] The electrical lines for energizing the electromagnetic coil 2 are guided out of the housing 1 and optionally from the support 8 in a supply hole in the radial or axial direction, wherein the supply hole is sealed by at least one seal when necessary.

[0055] The electromagnetic coil 2, together with the seal 3 or the inner housing 1d, separates the high-pressure side of the solenoid valve 100 toward the armature 4 from the low-pressure side of the electromagnetic coil 2 toward the supply hole of the housing 1, and the seal of the supply hole, which is used when needed, serves as a separation element between the high-pressure side and the low-pressure side.

[0056] The radial compressive strength and sealing performance of the solenoid valve 100 according to the present invention are ensured primarily in the longitudinal region between the two outer sides of the solenoid coil 2 by means of the individual parts or the entire solenoid coil 2 acting as a load-bearing composite, or by means of a hybrid structure consisting of the solenoid coil 2 and the housing 1, or by means of a composite consisting of the solenoid coil 2, the housing 1, and the load-bearing composite 8. Without the load-bearing solenoid coil 2 or the load-bearing composite consisting of the solenoid coil 2 and the housing 1, the solenoid valve 100 deforms unsealed under pressure loading and / or the inner housing 1d deforms impermissibly. Typically, the inner housing 1d, under internal pressure loading, is not configured to absorb all the pressure occurring within the flow path alone.

[0057] Depending on the structure of the solenoid valve 100 within the region of the solenoid coil 2, different individual components are required in the radial direction. If the radial compressive strength of the solenoid valve 100 within the region of the solenoid coil 2 is ensured by the coil body 2a of the solenoid coil 2, then the force caused by the pressure loading on the coil body 2a or the inner housing 1d is transmitted radially only to the coil body 2a, and not to the winding 2b, the filling material 2c, the outer housing 1e, or the support 8. If the radial compressive strength of the solenoid valve 100 within the region of the solenoid coil 2 is ensured by the load-bearing composite consisting of the coil body 2a and the winding 2b, then the force caused by the pressure loading on the coil body 2a or the inner housing 1d is transmitted radially only to the winding 2b, and not to the filling material 2c, the outer housing 1e, or the support 8. If the radial compressive strength of the solenoid valve 100 in the region of the solenoid coil 2 is ensured by a load-bearing composite consisting of the coil body 2a, winding 2b, and filler material 2c, then the force caused by the pressure loading of the coil body 2a or the inner housing 1d is transmitted radially only to the filler material 2c, but not to the outer housing 1e and the support 8. If the radial compressive strength of the solenoid valve 100 in the region of the solenoid coil 2 is ensured by a load-bearing composite consisting of the solenoid coil 2 and the outer housing 1e, then the force caused by the pressure loading of the coil body 2a or the inner housing 1d is transmitted radially only to the outer housing, but not to the support 8. If the radial compressive strength of the solenoid coil 100 in the region of the solenoid coil 2 is ensured by a load-bearing composite consisting of the solenoid coil 2, the outer housing 1e, and the support 8, then the force caused by the pressure loading of the winding 2a or the inner housing 1d is transmitted radially to the support 8.

[0058] Similar to the radial direction, the strength of the solenoid valve 100 in the region of the solenoid coil 2 in the axial direction is ensured only by the individual parts of the solenoid coil 2 or the entire solenoid coil 2 as a load-bearing composite, or by the load-bearing composite or hybrid structure consisting of the solenoid coil 2 and the housing 1, or by the load-bearing composite consisting of the solenoid coil 2, the housing 1 and the support 8, wherein the components vary depending on the structural requirements of the solenoid valve in the region of the solenoid coil 2.

[0059] Alternatively, individual components may be force-fitted together, for example by press fitting, threaded connection, by bonding, brazing, welding, interlocking or similar means, and optionally sealed and transmitted axial force by force-fitted connectors.

[0060] Optionally, the shown components or elements thereof are implemented as multiple pieces and optionally the shown components or elements thereof are combined into a single piece.

[0061] Optionally, the inner shell 1d may be entirely or partially made of magnetic material.

[0062] Optionally, the components or elements of the housing 1 shown are integrated into the electromagnetic coil 2, and optionally the components or elements of the electromagnetic coil 2 shown are integrated into the housing 1.

[0063] Optionally, the first magnetic flux guide 1g, the intermediate member 1h, and the second magnetic flux guide 1i constitute the coil body 2a.

[0064] Alternatively, the electromagnetic coil 2 may be implemented without a coil body 2a.

[0065] Preferably, the support body 8 is a container valve for a compressed gas tank and / or a housing for a compressed gas tank for a container valve, wherein the solenoid valve 100 is preferably positioned concentrically with the fixed thread and optionally positioned within the sealing area and / or the fixed thread relative to the compressed gas tank.

[0066] Preferably, the coil body 2a is made of a non-magnetic metal or polymer. Optionally, the coil body 2a of the electromagnetic coil 2 is partially or entirely made of a magnetizable material and is implemented as a one-piece or multi-piece assembly. Optionally, components of the electromagnetic coil 2 or the electromagnetic coil 2 itself are injection molded or coated. Optionally, the individual components shown in the housing 1 are integrated into the electromagnetic coil 2.

Claims

1. A solenoid valve (100), comprising: A housing (1) having an inlet (1a) and an outlet (1b) defining a flow path (11) through the solenoid valve (100) between the inlet and the outlet; a valve seat (12) arranged in the flow path (11); a valve piston including a magnetically conductive armature (4) and a sealing body (6); a closing spring (5); an electromagnetic coil (2); and a magnetically conductive yoke (1c). The electromagnetic coil (2) includes a coil body (2a) and a winding (2b). The closing spring (5) is configured to press the sealing body (6) against the valve seat (12) when the solenoid valve (100) is closed, or to lift the sealing body (6) from the valve seat (12) when the solenoid valve (100) is open, and the sealing body (6) is configured to seal relative to the valve seat (12) when the solenoid valve (100) is closed. The electromagnetic coil (2) is configured to move the armature (4) by means of magnetic force. The solenoid valve (100) includes a load-bearing composite acting in the radial direction, the composite being composed of adjacent components, the composite being configured to receive a nominal pressure present in the flow path (11), wherein the radial expansion of the load-bearing composite is less than 200 μm when receiving the nominal pressure, characterized in that... The load-bearing composite includes the coil body (2a) and the winding (2b).

2. The solenoid valve (100) according to claim 1, characterized in that, The coil body (2a) is in contact with the fluid in the flow path (11) and the coil body (2a) is sealed relative to the flow path (11), wherein the load-bearing composite also includes a magnetic yoke (1c).

3. The solenoid valve (100) according to claim 1, characterized in that, The solenoid valve (100) includes a sleeve (1f) disposed between the flow path (11) and the solenoid coil (2), wherein the sleeve (1f) is in contact with fluid in the flow path (11) and the sleeve (1f) is sealed relative to the flow path (11), wherein the load-bearing composite also includes the sleeve (1f) and the yoke (1c).

4. The solenoid valve (100) according to claim 3, characterized in that, The solenoid valve (100) has a magnetically conductive first flux guide (1g), a non-magnetically conductive intermediate part (1h), and a magnetically conductive second flux guide (1i) arranged sequentially in an axial direction oriented substantially perpendicular to the radial direction between the sleeve (1f) and the solenoid coil (2), wherein the sleeve (1f) is in contact with the fluid located in the flow path (11), and the sleeve (1f) is sealed relative to the flow path (11), wherein the load-bearing composite comprises: the sleeve (1f) and the yoke (1c), and a combination of the first flux guide (1g), the intermediate part (1h), and the second flux guide (1i).

5. The solenoid valve (100) according to claim 1, characterized in that, The solenoid valve (100) is arranged in the support body (8), wherein the load-bearing composite includes the support body (8).

6. The solenoid valve (100) according to claim 1, characterized in that, The electromagnetic coil (2) includes a filler material (2c), wherein the load-bearing composite includes the filler material (2c).

7. The solenoid valve (100) according to claim 1, characterized in that, The electromagnetic coil (2) is sealed relative to the housing (1).

8. The solenoid valve (100) according to claim 5, characterized in that, The housing (1) is sealed relative to the support (8).

9. The solenoid valve (100) according to claim 1, characterized in that, The coil body (2a) is sealed relative to the magnetic yoke (1c).

10. The solenoid valve (100) according to any one of claims 7 to 9, characterized in that, The seal is achieved by means of at least one seal (3) or a force-fitting connector.

11. The solenoid valve (100) according to any one of claims 3 to 4, characterized in that, An inner housing (1d) is arranged between the electromagnetic coil (2) and the flow path (11), the inner housing including the sleeve (1f).

12. The solenoid valve (100) according to claim 11, characterized in that, The inner shell (1d) is made of a non-magnetic material.

13. The solenoid valve (100) according to claim 1, characterized in that, The housing (1) includes a guide for supporting the armature (4), which is guided in the coil body (2a) of the electromagnetic coil (2), or an inner housing (1d) is arranged between the electromagnetic coil (2) and the flow path (11), and the armature (4) is guided in the inner housing (1d).

14. The solenoid valve (100) according to claim 1, characterized in that, The radial expansion of the load-bearing composite is less than 20 μm when subjected to nominal pressure.

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