Shut-off valve

Abstract

The present invention relates to a shut-off valve (100), preferably a crash valve, for interrupting a gas flow, comprising: a gas inlet (101); a gas outlet (102); a closure device (103) arranged in the direction of flow between the gas inlet and the gas outlet; said closure device (103) being movable along a direction of movement (X) from an open position to a closed position; the closure device (103) being biased closed; wherein the closure device (103) comprises a center lever (7), preferably protruding in the direction of movement, said lever (7) is adapted to move together with the closure device (103) so that the lever (7) occupies a first position in the open state and a second position in the closed state; a sensor unit (10) comprising an oscillating inertial element, preferably a first ring magnet (1) arranged inside a second, outer ring magnet (2), and a center pin (6) being arranged in a first position in the open state and a second, deflected position, different from the first position, in the closed state; wherein in the rest position, the center pin (6) maintains the center lever (7) in the open position, so that the closure device (103) is prevented from returning to the closed position; and wherein the center pin (6) is adapted to move from the rest position to the deflected position when an external force larger than a predetermined threshold, is exerted on the shut-off valve 100, causing the center lever (7) to assume the second position and the closure device (103) to assume the closed state.

Description

[0001] SHUT-OFF VALVE

[0002] Field of the invention

[0003] The present disclosure relates to the field of gas regulation and control, more specifically to an improved shut-off valve and a vehicle with such a valve.

[0004] Background of the invention

[0005] Gas, particularly liquefied petroleum gas (LPG), is widely used for various applications such as heating, cooling, and cooking in environments where a consistent electricity supply is not available. LPG is stored in high-pressure containers, with the majority in liquid form and a small portion in the gas phase. The pressure keeps the LPG in a liquid state, and the vapor is located at the top of the container due to gravity.

[0006] LPG is supplied in pressurized containers because it evaporates quickly at normal temperatures and pressures. The containers are typically filled up to 80% capacity to accommodate thermal expansion of the liquid. The pressure required to maintain LPG in a liquid state is called vapor pressure. When the LPG evaporates, it draws heat from the surrounding environment, but the gas phase of the LPG container does not transfer heat effectively.

[0007] Gas containers generally have pressures ranging from 0.3 to 16 bar, depending on the gas type and ambient temperature. The maximum gas flow rate from the container varies between 0.7 and 2.0 kg / h, depending on factors such as gas type, ambient temperature, and duration of usage.

[0008] To reduce the high pressure inside the gas container to a usable level, a gas regulator is typically used. The regulator is connected to the gas container and lowers the pressure to a desired supply level for gas appliances. This ensures that a specific gas pressure is delivered from the regulator to the appliance.

[0009] Regulation is commonly achieved in one or two steps using fixed outlet pressure regulators. These regulators are set to a predetermined outlet pressure, often around 30 mbar, although pressures of 37 mbar and 50 mbar are also common depending on the appliance requirements. Fixed outlet pressure regulators are widely used as they provide the necessary pressure for various types of gas appliances.

[0010] There are also adjustable regulators that allow users to adjust the gas pressure to compensate for pressure drops in the pipeline. However, this option is restricted in many countries due to safety concerns, as incorrect inlet pressure adjustments can lead to incomplete combustion and the release of dangerous gases such as carbon monoxide.

[0011] A common shut-off valve for gas appliances, such as those described below and used for example in campervans, operates as a safety mechanism to detect sudden impacts or crashes and prevent the unintended release of gas. These shut-off valves traditionally operate using gravity, which maintains a pendulum or ball in a specific position, thereby keeping a gas channel open. This configuration ensures that gas can flow through the appliance while maintaining normal usage.

[0012] In its standard functioning, the gas shut-off valve is carefully calibrated and positioned to be correctly oriented relative to gravity. The pendulum or ball within the shut-off valve is balanced to stay in a specific position that allows the gas channel to remain open. However, in the event of an impact occurring in the correct direction, the force and direction of the impact cause the pendulum or ball to move from its equilibrium position. This movement triggers a sequence of mechanical events.

[0013] When the pendulum or ball moves due to the impact, a spring-activated seal mechanism is set into motion. This mechanism is designed to promptly close the gas passage. The spring's tension forces the seal against the gas channel, effectively halting the flow of gas. This rapid response prevents any further gas from being released from the appliance, thus minimizing potential hazards like gas leakage, fires, or explosions.

[0014] Importantly, the spring-activated seal remains engaged even after the impact subsides. This means that the gas channel remains closed, and the pendulum or ball doesn't immediately return to its original position due to the tension in the spring and the sealed gas passage.

[0015] To reset the shut-off valve after an impact event and to restore gas flow, the system usually allows for manual intervention. By releasing the pressure on the spring mechanism, the pendulum or ball can return to its resting position, re-establishing the open gas channel.

[0016] The correct orientation of the shut-off valve is a critical aspect of its functionality. The shut-off valve must be positioned precisely with respect to gravity to ensure its sensitivity to impacts and movements in the intended direction.

[0017] Gravity plays a pivotal role in these shut-off valves, maintaining a pendulum or ball in a specific position to keep a gas channel open. When an impact occurs, particularly in the designated direction, the ball or pendulum shifts, activating a spring-powered seal that closes the gas passage. To optimize their functionality, these shut-off valves must be properly aligned with gravity.

[0018] Accurate calibration and adjustment are paramount due to the shut-off valve's reliance on gravity. Even minor deviations in the pendulum's or ball's position relative to gravity can impact its sensitivity and result in malfunction.

[0019] In summary, a shut-off valve for gas appliances relies on a balanced interplay between mechanical components, gravitational forces, and rapid response mechanisms. By detecting impacts and promptly shutting off gas flow, these shut-off valves play a pivotal role in enhancing the safety of gas-powered devices like campervan appliances.

[0020] Given these challenges, the objective of the invention is to provide an improved shut-off valve that ensures correct reliability of the shut-off valve irrespective of direction and positioning.

[0021] The subject matter claimed herein is not limited to embodiments that solve any disadvantages or that operate only in environments such as those described herein. Rather, this background is only provided to illustrate an example technology area where some implementations described herein may be practiced.

[0022] Summary of the invention

[0023] On this background, it is an object of the present invention to provide a solution that addresses the challenges of providing an improved shut-off valve. According to a first aspect of the invention, the objects laid out in the background section may be achieved by a shut-off valve preferably a crash valve, for interrupting a gas flow, comprising: a gas inlet; a gas outlet; a closure device arranged in the direction of flow between the gas inlet and the gas outlet; said closure device being movable along a direction of movement (X) from an open position to a closed position; the closure device being biased closed; wherein the closure device comprises a center lever preferably protruding in the direction of movement, said lever is adapted to move together with the closure device so that the lever occupies a first position in the open state and a second position in the closed state; a sensor unit comprising an oscillating inertial element, preferably a first ring magnet arranged inside a second, outer ring magnet and a center pin being arranged in a first position in the open state and a second, deflected position, different from the first position, in the closed state; wherein in the rest position, the center pin maintains the center lever in the open position, so that the closure device is prevented from returning to the closed position; and wherein the center pin is adapted to move from the rest position to the deflected position when an external force larger than a predetermined threshold, is exerted on the shut-off valve causing the center lever to assume the second position and the closure device to assume the closed state.

[0024] Hereby a shut off valve is provided that may be rotated in all directions and will still be able to function, since it is does not dependent on gravity. Consequently, the shut-off valve remains unaffected by the direction of the external force and functions reliably in any installation position, thereby preventing potential downstream leaks, especially in situations such as traffic accidents.

[0025] In an embodiment the center pin is deflectable in a direction approximately along by the operating plane (Y) of the oscillating inertial element.

[0026] In an embodiment a flow path between the gas inlet and gas outlet leads at least partially through the sensor unit arranged in the flow path between the gas inlet and the gas outlet.

[0027] In an embodiment when the center pin is in the deflected position and the center lever is in the second position, the center lever prevents the center pin from returning to the rest position. In an embodiment the sensor unit is substantially rotationally symmetrical with respect to an axis of symmetry.

[0028] In an embodiment the shut-off valve further comprises a reset button so as to move the center lever back into the first position in the open state, thereby allowing the center pin to move back into the rest position, when said reset button is activated, preferably pushed, by a user.

[0029] In an embodiment when the reset button is released from the push, the biased for closed of the closure device will attempt to move the center lever to the second position, wherein the center pin in the rest position will maintain the center lever in the first position so as to keep the shut off valve open.

[0030] In an embodiment the shut-off valve further comprising an indicator, preferably attached to the center lever adapted to inform a user, whether the shut-off valve is open or closed.

[0031] The ability for users to visually and effortlessly confirm the closure of the shut-off valve holds significant advantages in various contexts. By providing a clear visual indicator that the valve has been shut off, users are empowered with a sense of assurance and control over the equipment's operational status. This visual confirmation serves as a tangible checkpoint, mitigating the risk of inadvertent errors or oversights that could lead to unintended consequences.

[0032] In industrial settings, where safety and precision are paramount, being able to readily perceive the valve's shut-off condition at a glance enhances operational efficiency. This visual cue reduces the likelihood of misinterpretation and allows operators to promptly respond to any adjustments or maintenance needs. In emergency situations, such as during the shutdown of a gas supply, the immediate recognition of a closed valve aids in swift decision-making and ensures that safety protocols are effectively executed.

[0033] Furthermore, this feature promotes user confidence and familiarity with the equipment. When users can easily identify the valve's status without the need for complex procedures or additional tools, the overall user experience is streamlined, and user errors are minimized. As a result, the risk of potential system damage or operational disruptions due to improper valve positioning is significantly reduced. In an embodiment the center pin is biased to return from the deflected position to the rest position.

[0034] In an embodiment the center pin is configured to move from the rest position to the deflected position in response to the external force, regardless of the direction from which the force is applied to the shut-off valve.

[0035] In an embodiment the shut-off valve further comprises a second sensor element.

[0036] In an embodiment the shut-off valve is adapted to shut off the flow through said valve based on an external force acting on said valve, regardless of the angle and / or origin of the force.

[0037] In an embodiment the second sensor element comprises; a fourth, preferably radial, magnet arranged near the outlet end of the valve; a guide element preferably an elongated rod, extending between the first sensor element 10 and the fourth magnet; a third, preferably radial, magnet positioned around the guide element so that said guide element extends through the center opening of the magnet; wherein the third magnet is adapted to change from a base position to a crash position, when an external force is applied to the valve.

[0038] In an embodiment the reset button is adapted to return the sensor element and second sensor element to their opening state, so that when the reset button is activated and / or released the shut-off valve is returned to the open state where fluid / gas may flow through said valve.

[0039] The unique advantage of incorporating both the first sensing element and the second sensing element within the shut-off valve lies in its exceptional ability to respond and promptly shut off the gas or fluid supply, regardless of the direction from which an external force is exerted.

[0040] In conventional scenarios, valves often exhibit specific sensitivities to the direction of external forces, rendering their responsiveness contingent upon the force's origin. However, the strategic integration of these two sensing elements transforms the shut-off valve into a truly versatile safeguard. This innovation ensures that the valve can detect and react to external forces from any conceivable direction. Imagine a situation where the valve is exposed to varying environmental conditions or subject to unforeseen impacts. In such cases, the valve's capacity to respond reliably and instantaneously, regardless of the angle or vector of the external force, becomes a critical asset. Whether the force is applied horizontally, vertically, diagonally, or even obliquely, the shut-off valve remains poised to promptly engage its protective mechanism, shutting off the gas or fluid supply to prevent any potential hazards.

[0041] This adaptability not only enhances safety but also simplifies operations for users. The freedom from the need to consider force direction during valve installation or operation reduces complexity and eliminates the risk of unintentional errors. Moreover, this feature fosters user confidence, knowing that the valve's response is consistently reliable under various circumstances.

[0042] In essence, the combination of the first and second sensing elements equips the shutoff valve with an unprecedented level of versatility. This innovation ensures that the valve's protective function remains unwavering, irrespective of the angle, force application, or installation orientation. As a result, users can rest assured that the shut-off valve stands as a vigilant guardian against potential leaks or risks, contributing to enhanced safety and peace of mind in diverse operational scenarios.

[0043] According to a second aspect of the invention a vehicle (400), preferably a caravan or mobile home, with a shut-off valve according to the first aspect of the invention is provided.

[0044] According to a third aspect of the invention a house or stationary building with a shut-off valve 100 according to the first aspect of the invention is provided.

[0045] It will be understood that in the context of this description the external force acting upon the shut-off valve may arise from a plurality of different situations such as (but not limited to); crashes, earthquakes, natural disasters, rough roads, and so forth.

[0046] Various outside factors have the potential to trigger the valve's shut-off mechanism as a safety precaution. These factors encompass a range of situations, including seismic events like earthquakes, which can generate strong vibrations capable of activating the valve's safety features. Additionally, car crashes, whether involving the house or a camper van, could result in impacts that prompt the shut-off valve to engage. Structural shifts, such as foundation movements or collapses, can also activate the valve's safety mechanisms. Explosions, blasts, or shockwaves from nearby incidents can trigger the shut-off valve as well. Impact from falling objects, landslides, and rockslides can cause sudden movements that lead to the valve's activation. Moreover, severe weather conditions like storms and strong winds could contribute to impacts that prompt the valve to shut off. Structural failures in adjacent buildings or structures could generate impacts that activate the valve's safety features. Lastly, ruptures in nearby gas lines due to accidents or construction work may result in sudden pressure changes that trigger the valve's shut-off mechanism. In essence, the shut-off valve's ability to respond to these external factors aims to prevent gas leaks and potential hazards by promptly shutting off the gas supply in risky scenarios.

[0047] Having a shut-off valve in a vehicle such as a mobile home or camper van is crucial for a range of safety and operational reasons. These vehicles often rely on gas for cooking, heating, and powering appliances, making the shut-off valve a vital safety measure against potential gas leaks. In emergencies like accidents or damage, the shut-off valve enables occupants to swiftly halt the gas supply, minimizing risks of fire or explosions. It also provides users with control over the gas supply during periods of inactivity, enhancing safety during downtime. This feature is especially important as these vehicles navigate diverse terrains and conditions. Moreover, adhering to regulations mandating shutoff valve installation ensures legal compliance and peace of mind. Overall, the shut-off valve offers reassurance, control, and prevention, making it an indispensable component for safe and enjoyable travel experiences.

[0048] The spring mechanism used to shut the gas passage when the magnets move requires careful selection. The spring's characteristics, including stiffness and compression properties, dictate the sensor's responsiveness and how quickly it returns to its normal state may be selected depending on the installation of the shut-off valve.

[0049] The invention described herein offers a versatile solution applicable to a wide range of gases and liquids used within various contexts. This innovation accommodates not only liquefied petroleum gas (LPG) and natural gas, but also extends to encompass other pressurized liquids such as propane, butane, methane, ethane, and diverse forms of gases like hydrogen, nitrogen, and oxygen. These examples of gases and liquids commonly utilized within gas containers demonstrate the adaptability of the invention to different environments and applications, enhancing its utility and value across a spectrum of scenarios.

[0050] Any one or more of the above embodiments or preferred features can be combined with any one or more of the above aspects.

[0051] It is to be understood that both the foregoing general description and the following detailed description are examples and explanatory and are not restrictive of the invention, as claimed. It should be understood that the various embodiments are not limited to the arrangements and instrumentality shown in the drawings. It should also be understood that the embodiments may be combined, or that other embodiments may be utilized and that structural changes, unless so claimed, may be made without departing from the scope of the various embodiments of the present invention. The following detailed description is, therefore, not to be taken in a limiting sense.

[0052] Brief description of the drawings

[0053] The invention will be described in more detail below by means of nonlimiting examples of embodiments and with reference to the schematic drawings, in which:

[0054] Fig. 1a shows a cross section of an example of a sensor element 10 according to the invention.

[0055] Fig. 1 b shows a cross section of the senor element 10, wherein an external force (Z) has been applied to the sensor element 10.

[0056] Fig. 1c shows a cross section of an alternative embodiment of the sensor element 10.

[0057] Fig. 2a shows an illustrative example of a shut-off valve 100 according to the invention, where the valve is in an open state.

[0058] Fig. 2b shows an illustrative example of a shut-off valve 100 according to the invention, where the valve is in a closed state.

[0059] Fig. 2c shows an illustrative example of a shut-off valve 100 according to the invention, where the valve is returning to the open state after activation of the reset button 13. Fig. 3a shows an illustrative example of another embodiment of the shut-off valve 100 according to the invention, where the valve comprises both a sensor element 10 and a second sensor element 20, the valve 100 being in an open state.

[0060] Fig. 3b shows an illustrative example of another embodiment of the shut-off valve 100 according to the invention, the valve 100 being acted upon by an external force Z.

[0061] Fig. 3c shows an illustrative example of another embodiment of the shut-off valve 100 according to the invention, the valve 100 being in a closed state.

[0062] Fig. 3d shows an illustrative example of another embodiment of the shut-off valve 100 according to the invention, where the valve 100 is returning to the open state after activation of the reset button 13.

[0063] Detailed description of the invention

[0064] In the following, embodiments of the invention will be described in further detail. Each specific variation of the features can be applied to other embodiments of the invention unless specifically stated otherwise. Note that for illustrative purposes the dimensions, especially thickness and / or size of the different elements shown may be exaggerated.

[0065] Turning first to Fig. 1a which shows a cross section of an example of a sensor element 10 according to the invention. The sensor element 10 comprises a second magnet 2 and a first magnet 1. The first magnet 1 is arranged inside the second magnet 2.

[0066] The first magnet adapted to be the innermost magnet. The second magnet adapted to be the outer magnet 2.

[0067] The first and second magnets 1 ,2 are radial and / or ring-shaped magnets.

[0068] In a ring-shaped magnet, the magnetic field lines form a loop that travels from the north pole to the south pole within the magnet. This looped structure means that the magnetic field lines do not have a direct path from one pole to the other, as they do in a typical bar magnet. The first magnet 1 comprises its north pole I negative side (represented with a - sign) on its outside and its south pole I positive side (represented with a + sign) on its inside.

[0069] Imagine holding the ring-shaped magnet so that it's flat and you're looking at its crosssection. The magnetic field lines loop around the ring, traveling from the inside of the ring to the outside. This looped pattern means that every point on the ring's inner surface is part of the south pole, while every point on the outer surface is part of the north pole.

[0070] The second magnet 2 comprises its south pole I positive side (represented with a + sign) on its outside and its north pole I negative side (represented with a - sign) on its inside.

[0071] Hereby, when the first magnet 1 is arranged inside the second magnet 2, the negative, outer, side of the first magnet 1 faces the negative, inner side of the second magnet 2.

[0072] The two similar poles will repel each other keeping the first magnet 1 in the center of the second magnet 2.

[0073] Turning to fig. 1b which illustrates the same cross section of the senor element 10, wherein an external force (illustrated with an arrow ->) has been applied to the sensor element 10.

[0074] This force may be applied when the gas appliance I camper can tip over and / or are hit by an earthquake or other (natural) disaster, where it is desired to turn of the gas supply.

[0075] When the external force is lager than the repelling force between the magnets, it will move the first, inner, magnet 1 away from the approximate center of the second, outermost, magnet 2.

[0076] When the external force is no longer applied, the first magnet 1 will automatically return to the approximate center position of the second magnet 2.

[0077] Turning to fig. 1c where a cross section of an alternative embodiment of the sensor element 10 is shown.

[0078] Here the first magnet 1 comprises a plurality of standard bar magnets 3 placed in a ring / circular pattern, with the same poles directed either outwards and / or inwards. In an embodiment the first magnet 1 comprises at least 3 standard bar magnets 3, preferably at least 5 standard bar magnets, more preferred at least 10 standard bar magnets 3.

[0079] Here the second magnet 2 also comprises a plurality of standard bar magnets 4 placed in a ring / circular pattern, with the same poles directed either outwards and / or inwards. In an embodiment the second magnet 2 comprises at least 3 standard bar magnets 4, preferably at least 5 standard bar magnets 4, more preferred at least 10 standard bar magnets 4.

[0080] It will be understood that the orientation of the north and south poles in a ring magnet can be a bit counterintuitive. Unlike a traditional bar magnet where you can easily identify the poles by the ends, the ring magnet's poles are intertwined due to its continuous looped structure. If the ring magnet were to be cut in half along a plane perpendicular to the loop, you'd end up with two separate magnets, each with its own north and south pole. The cut would expose the inner surface's south pole on one half and the outer surface's north pole on the other half.

[0081] A traditional bar magnet is a rectangular or cylindrical magnet with two distinct ends or poles: a north pole and a south pole. It produces a magnetic field that extends from its north pole to its south pole, creating a continuous loop of magnetic lines of force. The two poles attract or repel each other and can interact with other magnetic materials.

[0082] Turning now to fig. 2a. In the context of this description the valve-part of the shut-off valve may be any standard valve with the desired functionality. The shut-off valve comprises a valve body; wherein the valve body has a switching space for the inertial bodies; the closure device having a valve disc and a corresponding valve seat on the valve body; wherein the center lever is a valve pin or a valve needle protruding in the moving direction of the closure device 103; and wherein the valve pin is preferably formed integrally on the valve head.

[0083] The two ring magnets 1 , 2 in the bottom of the shut off valve 100 keeps the center pin 6 in center. The center lever stands on the center pin 6, allowing gas or fluids to pass through the center lever and through the entire shut off valve 100. An indicator 9 attached to the center lever is visible through a looking glass 8, hereby informing a user looking from outside onto the unit 100, that the unit 100 is in normal (open) mode. The center lever is spring 14 operated. The spring 14 force tries to push the lever down. The ring magnets 1 , 2 are kept in place by two perforated plates 11 , 12 arranged on each side of the magnets. This ensure that the center magnet can only move in one operating plane (y-plane).

[0084] Hereby a shut off valve is provided that may be rotated in all directions and will still be able to function, since it is does not dependent on gravity. The direction of the force that may activate the sensing element 10, so that it will close the flow through the shut off valve 100, is preferably approximately parallel to the operating plane (y) of the magnets 1 , 2.

[0085] Fig 2b illustrates the situation where a force Z has been applied to the outside of the shut off valve 100, preferably approximately parallel to the operating plane (y) of the magnets 1 , 2, whereby the inner, first magnet 1 is moved away from the center position and further towards the second magnet 2. This also moves the center pin 6 along the operating plane (y), thereby allowing the center lever to be pushed down towards the magnets, hereby closing the opening through the shut off valve 100 with a seal.

[0086] The indicator 9, attached to the center lever is thus no longer visible through the looking glass 8, since it has been moved along with the lever. This informs the user that the shut off valve 100 is in crash (closed) mode. Gas / liquid can no longer flow through the unit.

[0087] Further the positioning of the center lever in crash / closed mode of the shut off valve 100, prevents the inner magnet 1 from being able to move back into its center position.

[0088] The user may push a reset button 13, as shown on fig. 2c to move the center lever back up to is starting position in open mode, allowing the first magnet 1 to move back into the center. When the reset button 13 is released from the push, the spring will try to push the center lever back down towards the magnets, but it will be stopped by the center pin 6 - keeping the flow of gas / liquid through the shut off valve 100 open.

[0089] Fig 3a shows another embodiment of the shut-off valve 100 according to the invention. Here the shut off valve 100 further comprises a second sensor element 20.

[0090] In an embodiment, the second sensor element 20 is adapted to sense an external force applied to the shut-off valve in an approximately vertical direction, encompassing the entire circumference of the valve. This also comprises instances where the force is applied at an angle.

[0091] In an embodiment, the sensor element 10 is adapted to sense an external force applied to the shut-off valve in an approximately horizontal direction, covering the entire circumference of the valve. This also encompasses forces applied at an angle.

[0092] If the first sensor element 10 does not react to a specific external force Z, the second sensor element 20, designed to detect more vertical external forces, will be activated instead. And vice versa.

[0093] Hereby the combination of having both the first sensing element 10 and the second sensing element 20 allows the shut-off valve to react and shut-off the gas / fluid supply irrespective to the direction of the external force.

[0094] Additionally, this means that the shut-off valve may be installed in any direction / orienta- tion, hereby eliminating the risk of installing the valve incorrectly, so that it will not function.

[0095] The sensor element 20 comprises a fourth, preferably radial, magnet 22 arranged near the outlet end of the valve, at a distance to the first sensor element 10.

[0096] The sensor element 20 further comprises a guide element 23, preferably an elongated rod, extending between the first sensor element 10 and the fourth magnet 22.

[0097] The sensor element 20 further comprises a third, preferably radial, magnet 21 positioned around the guide element 23, so that said guide element extends through the center opening of the magnet 21. The third magnet 21 is thereby also arranged between the first sensor element 10 and the fourth magnet 22.

[0098] In an embodiment the third magnet 21 comprises the same polarity as the first magnet 1.

[0099] In an embodiment the fourth magnet 22 comprises the same polarity as the second magnet 2. The polarity and positioning of the third magnet 21 on the elongated element, allows it to only move up and down between the first sensor element 10 and the fourth magnet 22 in an operating plane X.

[0100] Due to the polarity the third magnet 21 is repulsed from both the first sensor element 10 and the fourth magnet 22 and will therefor try to remain on the middle of the elongated element (with respect to the first sensor element 10 and the fourth magnet 22).

[0101] The third magnet 21 is biased towards a base position due to the polarity of the magnets, wherein the magnet 21 is arranged approximately in the middle of the sensor element 10 and the fourth magnet 22.

[0102] In an embodiment the third magnet 21 is adapted to change from the base position to a first crash position, wherein the third magnet moves towards the sensor element 10, when an external force is applied to the valve 100.

[0103] In an embodiment the third magnet is adapted to change from the base position to a second crash position, wherein the third magnet moves towards the fourth magnet 22, when an external force is applied to the valve 100.

[0104] It will be understood that the third magnet 21 is adapted to move along the elongated guide element 23 along the operating plane X.

[0105] In an embodiment the operating plane X of the second sensor element 20 is approximately perpendicular to the operating plane Y of the first sensor element 10.

[0106] In an embodiment the second sensor element 20 further comprises a, preferably elongated, activation element 24.

[0107] In an embodiment the activation element 24 comprises a first protrusion 24a arranged adjacent to, preferably abutting a part of the third magnet 21 .

[0108] In an embodiment the activation element 24 is biased towards the third magnet 21 , preferably by a spring, so that said spring pushes the activation element and / or the first protrusion 24a towards the third magnet 21. When the third magnet 21 is in the base position, the first protrusion 24a abuts a part of the third magnet 21.

[0109] Turning to fig. 3b which illustrates the embodiment shown in fig. 3a, wherein an external force Z has been applied to the shut-off valve in the operating direction X of the second sensor element 20. In this specific example the force has been applied towards the outlet end of the valve.

[0110] The application of the external force moves the third magnet 21 from the base position as shown in fig. 3a to a first crash position as shown on fig. 3b.

[0111] When the third magnet 21 changes from the base position to the first crash position, or to the second crash position (not shown), the bias of the elongated activation element 24 and the first protrusion 24a moves it closed towards the guide element 23.

[0112] In the shown embodiment the first protrusion 24a is moved in between the third magnet 21 and the fourth magnet 22, abutting a side of the third magnet 21 , so that the third magnet 21 cannot resume to the base position.

[0113] In an embodiment a part of the activation element 24 abuts a part of the third magnet 21 , when said magnet is arranged in the first crash position.

[0114] In an embodiment the elongated activation element 24 comprises a second protrusion 24b.

[0115] In an embodiment the elongated activation element extends in between the first magnet 1 and the second magnet 2.

[0116] In an embodiment the second protrusion 24b of the activation element 24 is arranged in the sensor element 10, preferably between the first magnet 1 and the second magnet 2.

[0117] As seen on fig. 3c when the third magnet 21 is moved to the first crash position and / or the second crash position, the change in position of the activation element 24 also changes the position of the second protrusion 24b, so that the second protrusion 24b moves / pushes the first magnet 1 from the center position, wherein the valve 100 is in an open state, towards the second magnet 2, so that the center pin 6 also moves along the operating plane Y, thereby allowing the center lever to be pushed down towards the first sensor element 10, hereby closing the opening through the shut off valve 100, so that no gas / fluid is able to flow through said valve.

[0118] The indicator 9, attached to the center lever is thus no longer visible through the looking glass 8, since it has been moved along with the lever. This informs the user that the shut off valve 100 is in crash (closed) mode. Gas / liquid can no longer flow through the valve 100.

[0119] To release the shut-off valve from the closed / crash mode / state, the user may push a reset button 13. When the reset button is pushed in, as shown on fig. 3d the center lever is moved back up to is starting position in open mode, allowing the first magnet 1 to move back into the center position, wherein the center pin 6 abuts the center lever so that the valve is in the open state.

[0120] In an embodiment the activation element 24 further comprises a third protrusion 24c. The third protrusion 24c is arranged near the center lever.

[0121] In an embodiment the reset button is further adapted to move the third protrusion 24c.

[0122] When the reset button 13 is pushed in the third protrusion 24c is moved along with the activation element 24. This also moves the second protrusion 24b and / or the first protrusion 24a back up the starting position in open mode, allowing the third magnet 21 to move back into the center position.

[0123] When the reset button 13 is released from the push, the bias will try to push the first protrusion 24a towards the third magnet 21 , so that the first protrusion 24a abuts a part of the third magnet in the base position, as seen on fig. 3a.

[0124] The external force that is needed to activate the valve 100 may be adjusted in a plurality of ways.

[0125] For example the strength of the magnets determines how high / large an external force that is required to active the shut-off valve.

[0126] If the weight of the first magnet 1 and center pin 6 is low, a higher force is needed to push them away from the center position. The center lever pushing down on the center pin 6 and the force of the magnets may add friction to the valve. If the spring force is higher and / or the area of contact is bigger, a higher force is needed to push the first magnet 1 away from its center.

[0127] In an embodiment approximately the same external force is required to activate both the first sensor element 10 and the second sensor element 20.

[0128] In an embodiment different levels of external force are required to activate the first sensor element 10 and the second sensor element 20, whereby it is possible to adjust the sensitivity of the shut-off valve depending on installation and / or needs of the user.

[0129] For example in an auto camper it may be adapted so that the shut-off valve does not activate easily to forces in the vertical direction (bumps on the road) but reacts easily to forces in the horizontal direction (an impact).

[0130] While specific language has been used to describe the present subject matter, any limitations arising on account thereto, are not intended. As would be apparent to a person in the art, various working modifications may be made to the method in order to implement the inventive concept taught herein. The drawings and the foregoing description give examples of embodiments. Those skilled in the art will appreciate that one or more of the described elements may well be combined into a single functional element. Alternatively, certain elements may be split into multiple functional elements, Elements from one embodiment may be added to another embodiment.

[0131] List of reference numbers

Claims

Claims1. A shut-off valve (100), preferably a crash valve, for interrupting a gas flow, comprising:• a gas inlet (101);• a gas outlet (102);• a closure device (103) arranged in the direction of flow between the gas inlet and the gas outlet; said closure device (103) being movable along a direction of movement (X) from an open position to a closed position; the closure device (103) being biased closed; wherein the closure device (103) comprises a center lever (7), protruding in the direction of movement, said lever (7) is adapted to move together with the closure device (103) so that the lever (7) occupies a first position in the open state and a second position in the closed state;• a sensor unit (10) comprising an oscillating inertial element, a first ring magnet (1) arranged inside a second, outer ring magnet (2), and a center pin (6) being arranged in a first position in the open state and a second, deflected position, different from the first position, in the closed state; wherein in a rest position, the center pin (6) maintains the center lever (7) in the open position, so that the closure device (103) is prevented from returning to the closed position; and wherein the center pin (6) is adapted to move from the rest position to the deflected position when an external force larger than a predetermined threshold, is exerted on the shut-off valve 100, causing the center lever (7) to assume the second position and the closure device (103) to assume the closed state.

2. A shut-off valve (100) according to claim 1 , wherein the center pin (6) is deflectable in a direction approximately along by the operating plane (Y) of the oscillating inertial element.

3. A shut-off valve (100) according to one of the preceding claims, wherein a flow path between the gas inlet (101) and gas outlet (102) leads at least partially through the sensor unit (10) arranged in the flow path between the gas inlet (101) and the gas outlet (102).

4. A shut-off valve (100) of any preceding claim, wherein when the center pin (6) is in the deflected position and the center lever (7) is in the second position, the center lever (7) prevents the center pin (6) from returning to the rest position.

5. A shut-off valve (100) according to any one of the preceding claims, wherein the sensor unit (10) is substantially rotationally symmetrical with respect to an axis of symmetry.

6. A shut-off valve (100) according to any of the preceding claims, wherein the shut-off valve further comprises a reset button (13), so as to move the center lever back into the first position in the open state, thereby allowing the center pin (6) to move back into the rest position, when said reset button is activated, preferably pushed, by a user.

7. A shut-off valve (100) according to claim 6, wherein when the reset button (13) is released from the push, the biased for closed of the closure device (103) will attempt to move the center lever (7) to the second position, wherein the center pin (6) in the rest position will maintain the center lever (7) in the first position so as to keep the shut off valve (100) open.

8. A shut-off valve (100) according to any of the preceding claims, said shut-off valve (100) further comprising an indicator (9), preferably attached to the center lever adapted to inform a user, whether the shut-off valve is open or closed.

9. A shut-off valve (100) according to any of the preceding claims, wherein the center pin (6) is biased to return from the deflected position to the rest position.

10. A shut-off valve (100) according to any of the preceding claims, wherein the center pin (6) is configured to move from the rest position to the deflected position in response to the external force, regardless of the direction from which the force is applied to the shut-off valve (100).

11. A shut-off valve (100) according to any of the preceding claims, wherein the shut-off valve further comprises a second sensor element (200).

12. A shut-off valve (100) according to claim 11 wherein the shut-off valve is adapted to shut off the flow through said valve based on an external force acting on said valve, regardless of the angle and / or origin of said force.

13. A shut-off valve (100) according to any one of claims 11 - 12 wherein the second sensor element (20) comprises;• a fourth, preferably radial, magnet (22) arranged near the outlet end (102) of the valve (100);• a guide element (23), preferably an elongated rod, extending between the first sensor element (10) and the fourth magnet (22);• a third, preferably radial, magnet (21) positioned around the guide element (23), so that said guide element extends through the center opening of the magnet (21); wherein the third magnet (21) is adapted to change from a base position to a crash position, when an external force is applied to the valve (100).

14. A shut-off valve (100) according to any one of claims 11 - 13 wherein the reset button (13) is adapted to return the sensor element (10) and second sensor element 2(0) to their opening state, so that when the reset button (13) is activated and / or released the shut-off valve (100) is returned to the open state where fluid / gas may flow through said valve (100).

15. A vehicle (400), preferably a caravan or mobile home, with a shut-off valve (100) according to one of claims 1 to 14.

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