Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
  • F16K1/32—Details
  • F16K1/34—Cutting-off parts, e.g. valve members, seats
  • F16K1/36—Valve members
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L23/00—Flanged joints
  • F16L23/16—Flanged joints characterised by the sealing means
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L23/00—Flanged joints
  • F16L23/16—Flanged joints characterised by the sealing means
  • F16L23/162—Flanged joints characterised by the sealing means the pipe ends abutting each other
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
  • F16K1/32—Details
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
  • F16K1/32—Details
  • F16K1/34—Cutting-off parts, e.g. valve members, seats
  • F16K1/42—Valve seats
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K27/00—Construction of housing; Use of materials therefor
  • F16K27/02—Construction of housing; Use of materials therefor of lift valves
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L21/00—Joints with sleeve or socket
  • F16L21/08—Joints with sleeve or socket with additional locking means
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L23/00—Flanged joints
  • F16L23/006—Attachments
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L23/00—Flanged joints
  • F16L23/02—Flanged joints the flanges being connected by members tensioned axially
  • F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
  • F16L23/026—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes by welding
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L23/00—Flanged joints
  • F16L23/16—Flanged joints characterised by the sealing means
  • F16L23/167—Flanged joints characterised by the sealing means in connection with the appearance or detection of leaks
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L23/00—Flanged joints
  • F16L23/16—Flanged joints characterised by the sealing means
  • F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings
  • F16L23/22—Flanged joints characterised by the sealing means the sealing means being rings made exclusively of a material other than metal
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
  • G01M3/00—Investigating fluid-tightness of structures
  • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
  • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
  • G01M3/00—Investigating fluid-tightness of structures
  • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
  • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
  • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
  • G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
  • G01M3/183—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for pipe joints or seals
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L2201/00—Special arrangements for pipe couplings
  • F16L2201/30—Detecting leaks

Definitions

• the present invention relates to a device for connecting a gas-carrying line element, in particular a hydrogen-carrying line element, to a counterpart, in particular to a component. Furthermore, the present invention relates to a method for connecting a gas-carrying line element, in particular a hydrogen-carrying line element, to a counterpart, in particular to a component.
• a gas-carrying line element in particular a fluid line for compressed hydrogen
• a component for example with a component into which the gas is to be introduced, such as an in-tank valve (in English "On-Tank-Valve (OTV)"), a Gas handling device (GHU), a gas pressure accumulator, or other gas-carrying components, or also with a component which is designed as a coupling element of another line element, are known from the prior art.Since the seal plays a decisive role with gases, typically Sealing elements are used. This also applies in particular to high-pressure applications, such as line elements for compressed natural gases or compressed hydrogen meet a high diffusion resistance, is of crucial importance.
• connection section with a connection body with a conical bore, a nut with a conical surface, a connection section being formed on a pipe.
• the connecting section has clamping surfaces produced by upsetting, which have an orientation like the associated conical bore or conical surface.
• upsetting which have an orientation like the associated conical bore or conical surface.
• Ferrule type connectors are also well known and typically include a threaded coupling nut, a threaded coupling body, and one or more ferrules fitted within the coupling nut A cylindrical conduit, such as a pipe end, is pushed into the coupling body with the ferrules tightly surrounding the outer wall of the conduit end.
• the coupling nut is on the threaded end of the coupling body installed, an axial force is exerted on the ferrule or ferrules causing the
• each ferrule and the body are engaged such that a swaging action is created whereby radial displacement of portions of the ferrules tightly grip the outer wall of the conduit end.
• the fitting can be removed using simple hand tools, such as
• a further disadvantage of conventional connection techniques for gas-carrying line elements is the fact that both the sealing elements and the screwing elements, which are used to create the sealing effect, come into direct contact with the medium to be sealed, in particular the gas.
• This is not dramatic with conventional gases such as natural gas, but can be a major hazard in connections used for hydrogen fluid lines. Since many materials, especially metals, tend to so-called "hydrogen embrittlement" when they come into contact with hydrogen, this can often lead to leaks in known connection technologies, especially in combination with changing stresses (temperature and voltage changes) and vibrations. Since hydrogen is the lightest of all chemical represents elements, permanently tight connection points are difficult to achieve.
• an object of the present invention is to provide a device and a method for connecting a gas-carrying line element to a counterpart which is able, on the one hand, to provide a defined to create a sealing situation which can be logged and thus certified and, on the other hand, to take into account the problems described above such as hydrogen embrittlement, the occurrence of leaks caused by temperature and voltage changes and vibrations, while at the same time enabling a simplified structure and thus reduced assembly and maintenance work.
• the stated object is achieved by a device for connecting a gas-carrying line element, in particular a hydrogen-carrying line element, with a counterpart, in particular a component, according to claim 1 and a method for connecting a gas-carrying line element, in particular a hydrogen-carrying line element, with a counterpart, in particular with a component according to claim 16.
• a device for connecting a gas-carrying line element, in particular a hydrogen-carrying line element with a counterpart, in particular a component, according to claim 1
• Preferred developments of the invention are specified in the dependent claims.
• One of the basic ideas of the present invention is to create a device for connecting a gas-carrying line element, which is preferably intended for conducting hydrogen, which has two seals that are connected in an outflow direction of a leaking or seeping or leaking gas one behind the other or in series are arranged and work on two different sealing principles.
• a first seal of the two seals which is preferably arranged first in the outflow direction, ie is arranged in front of a second seal of the two seals, preferably works as a seal which is sealed by a pressing force.
• the second seal works on a sealing principle that exerts or unfolds its sealing effect independently of an axial displacement, in particular in an installation direction E, which is necessary to produce the sealing effect of the first seal (pressing force).
• a seal of a device for connecting a gas-carrying line element to a counterpart can be provided, which on the one hand has a seal, namely the first seal, which can be recorded and certified by predetermined parameters that can be easily measured and recorded.
• the provision of the second seal additionally increases the sealing effect and in particular creates the possibility that even in the unfortunate event that the first seal leaks, ie gas escapes through the first seal, the second seal still seals the connection point in a gas-tight manner and thus creates time to repair the first seal before the gas actually escapes to the outside through the joint. This is extremely advantageous, especially in the field of explosion protection.
• a device for connecting a gas-carrying line element, in particular a hydrogen-carrying line element, to a counterpart, in particular a component has: at least one screw connection body which is designed to be brought into engagement with the counterpart in a tight, in particular gas-tight manner a first seal, which is designed in the form of a valve body which is set up to be brought into contact with a valve seat provided on the counterpart, in particular to be brought into contact in a gas-tight manner, or is designed in the form of a flat seal, and a second Seal that works on a sealing principle that exerts or unfolds its sealing effect independently of an axial displacement, in particular in an installation direction that is necessary for producing the sealing effect of the first seal.
• the present device relates to a so-called “mechanically attached connection”, such as fittings, joints, couplings, connectors, Valve inlets and outlets, valve ports, and the like used in fluid systems or fluid circuits, such as vehicular hydrogen supply systems, that contain fluid flow and fluid pressure.
• mechanically attached connections may be used with, but not limited to, conduit fittings for a pipe, tube, or any other type of conduit, and connect one conduit end to any other conduit end or to any other portion, element, or component of a fluid system, like a valve body.
• Such mechanically attached connections are characterized by a fluid-tight (gas-tight) seal and mechanical strength to hold the connection together, including adequate containment of the conduit under vibration, stress and pressure.
• the first seal is designed as a so-called metal seal or oscillating seal and/or the second seal is designed as a radial seal, an elastic seal, an O-ring, a delta ring, a liquid seal and the like and/or the second seal 5 is arranged after the first seal in an outflow direction of a gas leaking through the first seal and flowing out from the gas-carrying pipe member.
• a metallic seal means that two elements made of metal are pressed against each other under the influence of force, so that a fluid-tight connection is established between the two elements.
• an annular contact surface is produced between the two elements, within which the medium or gas to be sealed can flow.
• the valve body has an at least partially conical shape, rounded shape, spherical shape, spherical shape, and/or the valve seat provided in the counterpart has a tapering shape, in particular a conical shape.
• the first seal is formed on an end face of the screw connection body, in particular on an end side of the screw connection body, which dips into a recess of the counterpart (in the assembled or gas-tightly connected state) designed to complement the screw connection body, and/or the second seal is provided or formed on a peripheral surface of the preferably cylindrical screw connection body, which preferably faces an inner wall of the recess formed in the counterpart in the installed state.
• valve body and the valve seat are designed in such a way that an annular contact surface is formed, with a central axis of the valve seat and a central axis of the valve body being arranged parallel to one another, in particular coaxially to one another, and the valve body being parallel to the two central axes, in particular in the installation direction, is displaceable.
• the device further comprises at least one fluid channel having an open end provided between the first seal and the second seal and adapted to allow gas leaking through the first seal , which flows from the gas-carrying line element to detect.
• the fluid channel allows the leaking gas through the Added fluid channel and flow through it.
• the leaking gas can be fed to a downstream gas sensor, which can thereby detect the leaking gas and signal the presence of a leak.
• the at least one fluid channel is formed in the screw body and/or in the counterpart. If the fluid channel is formed in the screw body, a self-sufficient unit with leakage detection can be formed, which, however, increases the costs of the individual device (connecting device), which can nevertheless be advantageous in certain applications.
• the fluid channel also sniffer channel, is integrated in the counterpart, in particular in a component such as a gas handling device (GHU), several sealing points or connection points can be channeled to a sensor chamber, whereby several sealing points are monitored by only one sensor be able.
• GHU gas handling device
• the device in particular the screw connection body
• the device is set up to carry out a purely translatory movement, in particular in the direction of the installation direction, when the gas-tight connection is established between the screw connection body and the counterpart.
• the device is designed in such a way that during the connection, in particular the gas-tight connection by means of two seals arranged in series with one another, the gas-carrying line element with the counterpart, no relative rotary movement of the screw connection body to the counterpart takes place or is necessary.
• This makes assembly easier, particularly in the case of long line elements with several bends. This represents a great advantage over known screw connections, which in most cases are screwed into a counterpart via an external thread.
• the screw connection body can advantageously be provided with at least two, preferably four, through holes for receiving fastening screws, the through holes preferably being provided on a flange shoulder of the screw connection body, and the through holes in an outflow direction of a leaking or leaking through the first seal Gas, which flows out of the gas-carrying line element, are preferably arranged behind the two seals.
• the device can have a third seal, which is designed as a radial seal, an elastic seal, an 0-ring, a delta ring, an elastomeric sealing element, a liquid seal, and the like, the third seal in an outflow direction through which first seal of leaking gas, which flows out from the gas-carrying duct element, is arranged after the first seal or after the second seal.
• a third seal which is designed as a radial seal, an elastic seal, an 0-ring, a delta ring, an elastomeric sealing element, a liquid seal, and the like, the third seal in an outflow direction through which first seal of leaking gas, which flows out from the gas-carrying duct element, is arranged after the first seal or after the second seal.
• the device further comprises a second fluid channel having an open end provided between the second seal and the third seal and adapted to allow gas leaking through the first seal and through the second seal, which flows out of the gas-carrying line element.
• the gas-carrying line element is connected to the screw connection body in a gas-tight manner by a welded connection.
• a welded connection In this way, another possible leakage point, namely the connection point between the line element and the screw body, can be avoided and after the welding has taken place, a tightness test can be carried out, which can also be logged.
• the valve body of the first seal is pressed against the valve seat formed in the counterpart via a screw connection, in particular at least two, preferably four, clamping screws.
• a device or screw connection can be implemented in which a relatively exact pressing of the valve body against the valve seat can be implemented with a specified tightening torque of the clamping screws, so that a sealing contact of the corresponding elements can be ensured over a large temperature range, and over the applied tightening torques logging and thus certification is possible.
• valve body in particular the screw body, and/or the valve seat is made of a metal, in particular a steel material, preferably a stainless steel material, with the valve seat preferably being made of a harder material than the valve body.
• valve seat is made of a harder material than the valve body, it can be ensured that in the event of a possible plastic deformation when the valve body is pressed against or into the valve set, the valve body is plastically deformed and can be easily replaced.
• the valve seat of the counterpart which may be a valve seat provided in a complex valve unit such as a gas handling device, can be protected from plastic deformation.
• the at least one fluid channel preferably at least the two fluid channels, are channeled into a common sensor chamber in which a gas sensor for detecting gas is arranged. In this way, both seals can be monitored using a common sensor and a corresponding leakage detection device.
• the two fluid channels are routed into separate sensor chambers and any gas that may be escaping there can be detected independently of one another.
• the device according to the invention for connecting a gas-carrying line element to a counterpart can therefore be implemented very easily and inexpensively and advantageously allows logging and certification. It is therefore particularly suitable for sealing in systems in which hydrogen, in particular compressed hydrogen, or compressed natural gas is used. Such systems, which are exposed to particularly high temperature fluctuations, voltage fluctuations and vibrations, are found in particular in vehicles in which, for example, hydrogen at pressures of up to 700 bar or natural gas at typically 260 bar as fuel or fuel for driving the vehicle, for example via a Fuel cell is used.
• a vehicle or “means of transport” or other similar terms such as motor vehicles in general, such as passenger automobiles including sports utility vehicles (SUV), buses, trucks, various commercial vehicles, watercraft including various boats and ships, airplanes , flying drones and the like, hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen vehicles and other alternative vehicles.
• a hybrid vehicle is a vehicle that uses two or more fuels, for example, gasoline-powered and electric-powered vehicles at the same time.
• the present invention relates to a method for connecting a gas-carrying line element, in particular a hydrogen-carrying line element, to a counterpart, in particular to a component, preferably using the device described above, comprising: inserting a screw connection body into a complementary recess of the counterpart, tightening of the screw connection body by means of a screw connection on the counterpart, wherein: a first seal, in particular by pressing a valve body of the first seal against a valve seat provided in the counterpart, in particular in the recess, is brought into a sealed state, and a second seal, which works on a sealing principle that exerts its sealing effect independently of an axial displacement, in particular in an installation direction that is necessary for producing the sealing effect of the first seal, into a sealed one State, in particular between the screw body and the recess is brought.
• the method has a leak detection step, with an open end of a fluid channel being arranged between the first seal and the second seal and the other end of the fluid channel opening into a sensor chamber in which a gas sensor is arranged If there is a leak at the first seal, the leaking gas, which flows or leaks from the first line element, flows into the fluid channel and through this into the sensor chamber, with the gas sensor detecting the gas flowing into the sensor chamber, in particular the hydrogen, and thus a Leakage of the first seal is detected and signalled.
• signals is understood to mean that the gas sensor sends a signal to a controller, in particular a vehicle controller, in order to inform it that a leaking gas was detected and accordingly there is a leak in the monitored seal or screw connection. This can then be communicated, for example, via the control of a display, which lights up or displays a corresponding warning signal.
• the device for connecting a gas-carrying line element, in particular a hydrogen-carrying line element, to a counterpart, in particular a component can be used for the described method for connecting a gas-carrying line element to a counterpart. Therefore, the additional features disclosed in connection with the above description of the device can also be applied to the method. The same applies vice versa for the procedure.
• Fig. 1 shows schematically a known device for connecting a gas-carrying line element with a
• Fig. 2 simplifies an embodiment of a device according to the invention for connecting a gas-carrying line element to a counterpart. Description of Embodiments
• FIG. 1 schematically shows a known device 200 for connecting a gas-carrying line element 201 to a counterpart (not shown).
• the connecting device shown in Figure 1 is of the ferrule type.
• such connecting devices 200 comprise a threaded coupling nut 202, a threaded coupling body 203 and one or more ring ferrules 204, 205 which are mounted within the coupling nut 202 are fitted in.
• the coupling body 203 usually includes a stop surface 206 which engages or can be brought into engagement with a stop surface on a ferrule Ferrules 204, 205 tightly surround the outer wall of the conduit end.
• a stop surface 206 which engages or can be brought into engagement with a stop surface on a ferrule Ferrules 204, 205 tightly surround the outer wall of the conduit end.
• FIG. 2 shows a simplified embodiment of a device 100 according to the invention for connecting a gas-carrying line element 1 to a counterpart 2, which in the illustrated embodiment is part of a valve block, such as a gas handling device.
• the device 100 shown consists of a cylindrical screw connection body 10 which extends longitudinally along an installation direction E.
• one of the counterparts is 2
• the line element 1 to be connected is welded to the end face of the screw connection body 10 facing away from it, as shown, the weld seam 9 is made slightly larger in order to ensure that the weld seam is gas-tight.
• the screw connection body 10 has a flange attachment 10c, which is provided with four through-holes which are radially spaced apart in the circumferential direction, in particular spaced apart at an angle of 90° to one another.
• the counterpart 2 has four complementary threaded bores, with which the screw connection body 10 can be screwed against the counterpart 2 in a defined manner via four clamping screws and can be fastened to it.
• valve body 3a On the other end side, i.e. the end side facing the counterpart 2, of the fitting body 10, a valve body 3a, which forms a part or region of the fitting body 10, is formed.
• the valve body 3a is cone-shaped.
• the counterpart 2 is formed with a recess 2a, which has a shape complementary to the cylindrical shape of the screw connection body 10, in particular a cylindrical shape, and forms a loose fit with the screw connection body 10 when it is inserted or inserted.
• a valve seat 4 is formed at the lower or inner end of the recess 2a, which is conically shaped to complement the valve body 3a, the exact contour, angle and the like of the two elements 3a, 4 depending on the respective application, in particular the prevailing working pressure Materials of the two elements and the like depend.
• the valve body 3a could also be curved or spherical. It is crucial that an annular contact surface is formed between the two elements. As can also be seen from FIG.
• the screw connection body 10 has two annular circumferential grooves provided on the cylindrical peripheral surface 10a, in each of which an O-ring is inserted as the second and third seal 3, 5, in particular an elastic seal, and gas-tight abut against a cylindrical inner wall of the recess 2a of the counterpart 2.
• the valve body 3a is pressed against the valve seat 4, creating a gas-tight seal or a gas-tight seal (first seal) between the valve body 3a and the valve seat 4 is formed, also called metallic seal.
• first seal gas-tight seal
• second seals 5, 8 two additional (so-called safety seals) are provided, which are only used if the first seal 3 should form a leak.
• the second and third seals 5, 8 only have to seal if the first seal starts to leak.
• the second seal 5 and the third seal 8 are arranged behind the first seal in an outflow direction A of a gas leaking through the first seal 3 .
• the second and third seals 5, 8 are arranged axially spaced apart from the first seal 3 counter to the installation direction E.
• Figure 2 shows two fluid channels 7a, 7b, each of which has an open end, with the open end of the first fluid channel 7a being arranged between the first and second seals 3, 5 and the open end of the second fluid channel 7b being between the second and of the third seal 3, 5 are arranged.
• the two open ends of the fluid channels 7a, 7b are each on the inner surface of the recess 2a of the counterpart 2.
• the two fluid channels 7a, 7b can each lead to a separate sensor chamber 11, in each of which a gas sensor 12 is arranged (not shown) . In this way, it can be determined independently of one another whether only the first seal 3 (fluid channel 7a) is leaking, or whether the first and the second seal 3, 5 (fluid channel 7b) are leaking. In the embodiment shown, however, both fluid channels 7a, 7b are routed into a common sensor chamber 11, which is why only one gas sensor needs to be provided in order to be able to detect a leak in the two seals 3, 5. This is a cheaper option.
• FIG. 2 also shows that the fitting body 10 can optionally also be equipped with a fluid channel 7c.
• the open end of the fluid passage 7c is located between the second and third seals 5, 8, so a leak can only be detected when the two seals (first and second seals 3, 5) are leaking (if the two fluid passages 7a, 7b should not be provided).

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Valve Housings (AREA)
• Joints With Pressure Members (AREA)
• Examining Or Testing Airtightness (AREA)
• Flanged Joints, Insulating Joints, And Other Joints (AREA)
• Lift Valve (AREA)

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Publications (1)

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ID=76891052

Family Applications (1)

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• 2020
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