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
  • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
  • F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
  • F16K17/38—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature
  • F16K17/383—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature the valve comprising fusible, softening or meltable elements, e.g. used as link, blocking element, seal, closure plug

Definitions

• the invention relates to a temperature-sensitive shut-off valve, in particular for gas lines, with a housing having a passage, in which a closing body and at least one temperature-sensitive component are arranged.
• Such generic temperature-sensitive shut-off valves are used in particular as fire protection valves in pipes, in particular in gas lines in front of gas valves, gas appliances and the like. If the temperature rises, for example as a result of a fire, the shut-off valves are intended to prevent the medium from being fed through the pipeline, in particular the gas supply.
• a closing body is arranged in a housing having a passage, which closes the passage in the event of a temperature rise.
• the passage can be straight or kinked.
• the closing body is biased in one direction and placed on a bearing element.
• a temperature-sensitive component ensures that the closing body is moved in one direction away from the bearing element in the event of a temperature increase due to the pretensioning, in order to close the passage at a location provided for this purpose.
• a shut-off valve of the type described is known from EP-A 11 81 52.
• the closing body is formed by a ball which is biased by a spring on the one hand and is arranged on a bearing element which is made of an alloy with thermal Shape memory is formed. After the closing process, automatic opening is difficult.
• EP-A 34 36 1 5 Another fitting of the type described is known from EP-A 34 36 1 5, in which the closing body is designed as a cone.
• a guide rod is attached to the cone and biased against a stop by means of a compression spring.
• the guide rod is held in this position by a melting body.
• the melting body softens, the cone is suddenly moved in the closing direction under the action of the compression spring.
• shut-off valve of the generic type is known from WO-A-93 06 397.
• the ball In the passage of the housing, the ball is supported on the one hand directly on a temperature-sensitive element, and on the other hand on the housing or balls in between.
• the closing body must be adapted to it.
• the assembly of the closing body placed on spherical elements and the temperature-sensitive element is also very complex.
• the temperature sensitivity control is problematic in all known shut-off valves, since the temperature-sensitive elements, particularly in a device according to WO-A-93 06 397, are arranged far inside the housing and are in temperature-conducting contact with the closing body.
• the closing body is placed on elements lying in the closing path direction and is loaded by a spring.
• the assembly is not unproblematic, on the other hand, due to an increase in temperature, at least one obstacle must be moved away from the closing path in order to release the closing path. This also triggers the triggering and does not always guarantee a safe and tilt-free triggering.
• the present invention is based on the object of further developing a shut-off valve of the generic type in such a way that it can be easily assembled with simply manufactured parts and has a high degree of sensitivity to
• At least two clamping elements lying in a radial plane are arranged in the housing for clamping the closing body, the radial distance of which can be changed by the temperature-sensitive component.
• the shut-off valve according to the invention has simply formed components which are particularly easy to assemble. Contrary to all previously known solutions, the closing body is clamped like a vice between at least two clamping elements lying in a radial plane. This clamping is preferably carried out behind the closing area and, in the case of a spherical closing body, in the area its equator or in a tapered area behind it. In particular, it is also conceivable to form vertical surfaces on the closing body, against which the clamping elements rest. According to the invention, the safe function of the shut-off valve is ensured since the passage area is not blocked by any obstacles to be cleared out of the way, so that a central and untilted release of the closing element can be effected.
• the clamping elements be designed like pins. If two clamping elements are used, they are preferably arranged diametrically opposite one another in the housing. The end faces are worked out correspondingly to the side faces of the closing body, so that an almost linear vice-like clamping can take place.
• at least one of the clamping elements is formed by a temperature-sensitive element. Only the change in length of this temperature-sensitive element can increase the distance between the clamping elements lying in a radial plane, so that the closing body is suddenly released without having to pass an obstacle.
• shut-off valve ensures the safe function of the shut-off valve, since the passage area is released in a defined manner by the holding element, so that a central and untilted release of the closing element can be effected.
• the closing body can advantageously have the shape of a spherical segment, alternatively also the shape of a sphere. It is advantageously proposed that the closing body have a bore on the side pointing away from the sealing area. This bore can serve, for example, to accommodate a prestressing element.
• the biasing element is a spring element.
• Spiral springs, coil springs, but also other elements such as a porous metal bellows, pressurized pistons or the like can serve as the spring element. Also as a result of Temperature increase their volume increasing materials in combination with
• Spring elements are used for preloading.
• the counter-bearing of the spring element on the housing takes place either directly on housing projections, bearing rings or the like, or via holding elements such as a ring, brackets, bracket, etc.
• the invention proposes to guide the spring element with particular advantage. If, for example, a helical or a spiral spring is used, these can advantageously be guided over a guide pin, which is otherwise positioned stationary relative to the housing. This measure prevents the spring element from tilting and the closing body from tilting. In a particularly advantageous manner, the guide pin projects into the closing body in the fastening position.
• the housing advantageously has a through hole.
• a bearing seat for a spring element is formed in the through hole.
• the bearing seat can advantageously be an annular surface.
• the valve seat in which the closing element engages in the event of a fire, is funnel-shaped in accordance with a proposal of the invention.
• the funnel-shaped taper leads from a valve chamber with a large diameter into a pipe socket with a smaller diameter, so that the closing body can advance through the funnel guide in a closing manner.
• the funnel-shaped valve seat inlet has a convex cross section, i. H. the diameter does not taper linearly, but following a curve that initially has a large curvature that decreases more and more.
• the diameter of the bore connected to the funnel-shaped valve seat is slightly smaller than the diameter of the closing body in the area of its sealing surface.
• the outside of the housing is essentially cylindrical.
• the housing can have a thread at both ends, for example on existing connection fittings to be connected or simply to be used in cables.
• internal and / or external threads can be formed.
• the housing advantageously has at least one polygonal ring in order to be able to apply a torsional force by applying a key.
• the temperature-sensitive trigger element has a material which changes its volume as a result of a temperature change.
• the trigger element advantageously has fusible link.
• the trigger element has a two-part structure, one part being a bearing element in order to mount the trigger element relative to the housing and the other part a receiving part in order to accommodate the blocking region of the holding element.
• the volume-changing material is arranged between the two parts.
• the two parts with the volume-changing material preferably fusible link, form a rigid unit, the two parts moving relative to one another due to the melting fusible link due to an increase in temperature, so that the blocking area of the holding element can be moved out of the passage area.
• the bearing part and the receiving part are advantageously designed in the form of a cylinder / piston arrangement, the cylinder forming the bearing part which is fastened to the housing, while the piston forms the receiving part which is movable relative to the cylinder.
• the cylinder pot is advantageously inserted into a bore in the housing, advantageously into a threaded bore.
• the trigger element have a position indicator.
• this is formed by a projection arranged on the relatively movable part, which protrudes through or otherwise penetrates the part fixed to the housing.
• the fusible link is advantageously arranged in the region of the bearing part which, in the installed position, points furthest to the outside of the housing.
• the inventive design of the trigger element makes it possible to insert a cylinder pot into a threaded bore in the housing, so that the trigger element itself has an outwardly facing surface located outside the housing. This ensures a special sensitivity to temperature. This is favored by the arrangement of the solder in the area of this outer surface.
• the position indicator ensures that it can be recognized from the outside whether the valve is open or closed.
• the described design of the temperature-sensitive element enables manufacturing or other defects to be recognized immediately.
• a temperature-sensitive element as described represents a sensitive point from the point of view of the flow medium leakage. It may therefore be particularly advisable to simply design the temperature-sensitive element as a cylinder-pot-like element with an inserted pin-like piston without the breakthrough in the display, with soldered solder being arranged in the bottom of the pot.
• soldered solder being arranged in the bottom of the pot.
• Such an element can be inserted into a bore in the interior of the housing, so that the soldering area is brought as far as possible to the outer edge.
• a dowel pin with a long fine thread can then be used in the through hole area.
• the clamping elements are screwed into the housing wall.
• the pin-like clamping elements can be designed to be tensionable and spring-loaded.
• at least one of the clamping elements can be designed so that it is accessible from the outside of the housing. In a particularly advantageous manner, this is the temperature-sensitive element.
• the invention also proposes that the housing is a piece of pipe.
• the pipe section can be part of a line pipe or a pipe socket of a fitting.
• This variant according to the invention makes it possible to design the shut-off valve practically as an insert element which can be used in existing pipes.
• threads can be cut into the pipe sections and the shut-off valve designed as an insert element can be screwed in.
• Gluing, soldering or any other type of installation are also conceivable. It is essential that the other elements such as closing body, spring element, spring bearing and especially the clamping elements are integrated into one insert unit.
• the invention proposes in a particularly advantageous manner a solution in which the shut-off valve is formed from a tube piece provided with a seat or a valve housing into which a unit consisting of a bearing base, spring position, closing body, temperature-sensitive component and closing spring is inserted.
• the bearing base consists of a cylindrical, one-sided closed sleeve body, on which preferably three leg-like elements are arranged, by means of which the sleeve body can be pressed into the inner bore of a pipe section, a fitting or a housing.
• One of the three legs is provided with a receiving space for receiving a temperature-sensitive element.
• a spring is inserted into the cylindrical sleeve.
• the closing body On the non-closed side, the closing body is inserted with a molded-on piece, which is fixed in the sleeve body by the clamping in the radial plane by means of the temperature-sensitive element.
• This unit consisting of a press-fit sleeve body with a closing body, closing spring and temperature-sensitive element has the particular advantage that it can be mounted very easily in corresponding bores which are designed with a closable opening.
• the arrangement of the clamping elements ensures safe triggering and the design of the valve seat and Closing body a secure closure, even if the spring force decreases due to the temperature increase. Because the closing body can be guided essentially in a centered manner, material weaknesses of the spring as a result of the initial temperature effect cannot have any serious consequences. Due to the convex design of the valve seat, a guaranteed latching closure between the closing body and the valve seat in the housing can be guaranteed at any point.
• Figure 1 is a schematic front view of a shut-off valve.
• Fig. 2 is a view of the shut-off valve according to FIG. 1 in a
• FIG. 3 shows a schematic sectional view along the line III-III in FIG.
• Fig. 4 is an illustration of a trigger element
• Fig. 5 is a sectional view of an embodiment of a
• Fig. 6 is a plan view of the trigger element in the direction of the arrow
• Fig. 7 is a sectional view taken along the line Vll-Vll in Fig. 5;
• FIG. 8 shows a sectional illustration of a further exemplary embodiment of a shut-off valve
• FIG. 9 shows a sectional illustration of the fitting according to FIG. 8 in a triggered state
• Figure 1 0 is a sectional view of another embodiment of a shut-off valve.
• Figure 1 1 is a sectional view of another embodiment of a shut-off valve.
• Figure 1 2 is a sectional view of a further embodiment of a shut-off valve.
• Fig. 1 3 is a sectional view of the valve of Figure 1 1 in a triggered state.
• Figure 1 4 is a sectional view of a further embodiment of a shut-off valve.
• Figure 1 5 is a sectional view of a further embodiment of a shut-off valve.
• Fig. 1 6 is a sectional view of the shut-off valve according to Figure 1 5 in a triggered state.
• Figure 1 7 is a sectional view of another
• Figure 1 8 is a sectional view of the valve of Figure 1 7 in a triggered state
• Figure 1 9 is an illustration of a valve body
• Figure 20 is a representation of Figure 1 9 in section
• Figure 21 is a plan view of the base body according to Figure 1 9;
• Figure 22 is a sectional view of a closing body;
• Figure 23 is a plan view of the closing body according to Figure 22 and
• FIG. 24 shows an application example for the exemplary embodiment according to FIG. 1 7.
• the shut-off valve 1 shown in FIGS. 1 to 3 comprises an essentially cylindrical housing 2, which in the exemplary embodiment shown has two connecting pieces 3 and 4.
• the housing is provided with a polygon 5, to which a key can be used, for example, for mounting.
• a temperature sensitive element 6 is inserted into a bore 7 in the housing.
• the shut-off valve 1 can be used, for example, in a valve 8 of a gas system, as shown in FIGS. 2 and 4.
• the respective designs for the arrangement of sealing means and the like are provided on the end faces.
• the bore 7 for the temperature-sensitive element 6 is formed in the area of the polygon, so that it is also visible when the fitting 1 is inserted with its connecting piece into a system consisting of fittings and / or lines.
• the temperature-sensitive element 6 comprises a cylinder 1 8 and a piston 1 9. Both are arranged in a predetermined position by fusible link 20 arranged on the cylinder base. With the cylinder 1 8, the temperature-sensitive element 6 is attached to the housing 2 by inserting it into the bore 7. The position of the piston 1 9 is such that sufficient pressure is exerted on the closing body so that the passage is blocked for the closing body. At a certain temperature, the fusible link clears the way for the piston 1 9 into the cylinder 1 8 so that the closing body can pass through.
• FIG. 5 shows an enlarged sectional view of a Shut-off valve 1 in the functional state, ie the shut-off valve 1 can be installed in a pipe system and a medium can flow through it.
• the temperature-sensitive element 6 shown in this exemplary embodiment is likewise inserted in a bore 7 in the housing 2.
• an external thread can be formed on the cylinder, while the bore 7 is designed as a threaded bore.
• a cam is formed on the piston, which projects through the cylinder in its bottom region. The ring-shaped fusible link fixes the cylinder / piston arrangement in its preload position.
• FIG. 6 shows a plan view of the end face of the temperature-sensitive element 6, wherein the end face region of the cylinder 1 8 is provided with a pot-like polygon, so that the temperature-sensitive element 6 can be screwed in and out.
• a hole is arranged approximately in the center of the end face of the cylinder 1 8, into which a shoulder of the piston 1 9 projects.
• the shut-off valve 1, shown schematically in section in FIGS. 5 and 7, has a passage 22 in the interior of the housing 2, which in turn has the connecting pieces 3 and 4 and the polygon 5, which opens into an outlet 26 at the outlet end.
• a holding space 27, to which the funnel 25 connects, is formed in the central region.
• the spherical closing body 1 2 is held by the holding pin 1 3 inserted into a hole in the holding space 27 and the temperature-sensitive element 6.
• the retaining pin 1 3 and the temperature-sensitive element are arranged substantially diametrically opposite in the same radial plane of the housing 2 and clamp the essentially spherical closing body 1 2 in the area of its equator.
• the closing body can be easily inserted and installed in this position and after the temperature-sensitive element 6 has been triggered, the cylinder moving towards the outside of the housing, no obstacles have to pass until the closing body presses into the convex funnel 25 and the outlet at the funnel bottom 26 closes.
• the diameter of the outlet area is chosen so that it is slightly smaller than the diameter of the closing body, in the exemplary embodiment shown the ball 1 2. This results in a complete closure of the outlet 26. Due to the movement of the piston 1 9 in the cylinder 1 8 of the temperature-sensitive element 6 due to the melting solder, the piston neck has migrated through the bore in the cylinder bottom and protrudes outwards. It can thus be immediately recognized from the outside that the fitting has triggered and is in an inevitably closed state. In particular, manufacturing or other defects are also recognizable.
• the closing body can be supported by a spring which is inserted into the housing in the region of the passage 22 by means of a holding element known per se and acts on the closing body.
• the described configuration also entails that practically no obstacles are arranged in the flow path with the exception of the two pin-like holding elements, so that a good flow of fittings is ensured.
• the vice-like clamping of the closing body in the undissolved state reduces the number of components required and simplifies assembly considerably. In addition, triggering is faster and safer.
• the housing 2 also has a connecting piece 3 with an internal thread and a connecting piece 4 with an external thread.
• a spherical closing body 1 2 is held between two pin-like elements, namely between the temperature-sensitive element 6 and the holding pin 1 3.
• the temperature-sensitive element 6 is inserted into a blind hole in the housing, while the holding pin 1 3 seals in a through hole 7 in Housing is inserted.
• the ball forming the closing body has a bore in which a spring 10 is mounted, which is supported at its other end on a holding element 11 which is arranged on a bearing area 23 in the housing.
• the holding element 1 1 can be a clasp, a web, star-shaped or other geometric shapes, as long as it can be flowed through sufficiently and serves as a counter bearing for the spring 10. Metals or plastics can be used as the material for the components mentioned.
• the vise-like clamped ball 1 2 is driven by the force of the spring 1 0 when the shut-off valve 1 is triggered into the convex funnel 25 in order to To close the valve. It is triggered by the temperature-sensitive element, which can be moved laterally as a result of the temperature increase and the melt solder drain.
• the connecting piece 3 is also provided with an external thread, so that a corresponding space remains in the interior for the arrangement of the holding element 1 1 in an upstream position.
• the valve can be made shorter overall.
• additional polygonal rings or alternative polygonal rings can be arranged.
• the use of the temperature-sensitive element 6 in the blind bore of the housing 2 avoids any leakage in this area.
• the bore can be designed in such a way that the fusible link area of the temperature-sensitive element, as shown in FIGS. 8 and 10, is as far as possible on the outside of the housing.
• a pin element with a very long fine thread can be screwed into the through hole 7. On the one hand, this supports the tensioning of the ball 1 2, on the other hand, this configuration avoids any leakage problem. Additional glue can be used when inserting the pin elements into the respective holes.
• FIGS. 1 2 and 1 3 in different functional states correspond in terms of their essential construction to the exemplary embodiments already described. It turns out that the outlet 26 is conical, so that the spherical closing body seals well there.
• the exemplary embodiment shown discloses the use of a guide pin 28 which is inserted on the one hand on the holding element 11 and extends into the bore of the closing body.
• the guide pin can for example be made of a temperature-resistant plastic, a metal or similar materials. With regard to its contour, it can also be designed to meet requirements, for example to exclude twists and the like.
• the guide pin 28 is surrounded by the spring 10. Both the spring 1 0 and the ball 1 2 are thus guided and cannot tilt during the triggering process. This ensures safe closing.
• Fig. 14 which shows a corner tap, in which a shut-off valve 1 is used, shows another special feature.
• an end seal 30 is inserted in the end edge of the shut-off fitting 1 inserted into the fitting. This increases the tightness considerably and also guarantees it in the event of a trigger.
• the seal assembly is considerably simplified and thus the manufacturing costs are reduced.
• shut-off valve 1 is integrated directly into a connection valve 8. There is therefore no need to use the shut-off valve connector and the housing is provided by a housing extension of the valve 8.
• the elements such as holding element 11, guide pin 28, spring 10, ball 12 and the holding pins 13 and 6 can be integrated into one unit and subsequently inserted into the tubular housing of a line or a fitting.
• the shut-off valve 1 is formed in that a unit consisting of spring element, closing body, release element and counter bearing for the spring is inserted into a housing 2.
• This unit is designated cartridge 31.
• a cartridge consists of a sleeve 32, which can be made of aluminum or another corresponding material, for example.
• Bearing webs 33 are integrally formed on the sleeve 32.
• this can be done in that a lower sleeve ring is made in one piece with molded bearing webs from a material on which an upper sleeve 32 is placed. The material of the lower sleeve ring must depend on the place of use.
• the lower sleeve ring with molded-on bearing webs can be made of brass. In the event that higher temperatures have to be secured, for example up to 925 ° C, this area must be made of steel.
• the upper sleeve area, which is in one piece can be created with the lower area or can be produced separately from this, the material selection can then be adapted accordingly.
• An essential element of the sleeve 32 is that it has a closure 38 at one end. This can be retrofitted, screwed in or fastened in some other way or can also be formed in one piece.
• Figures 1 9 to 21 show an embodiment for a sleeve 32 which is made in one piece from one material. This has the sleeve area 32, the bearing webs 33, the closure 38 and a seat 37, in which a release element can be used. The shape of the bearing webs can be adjusted from a fluidic point of view.
• the sleeve 32 is inserted into the existing bore of the tube piece or armature forming the housing 2 by means of the bearing blocks 8 pressed. In addition to pressing, welding, gluing or even screwing can also take place here.
• the spring 36 is inserted, a closing spring which is mounted against the closure 38.
• the sleeve 32 has an enlarged bore in the area lying between the bearing webs 33, into which a closing body 35 with a tapered area 43 can be inserted.
• the closing body 35 shown in detail in FIGS. 22 and 23 has a spherical closing area 39 which, in the exemplary embodiment shown, has a flat 42 on the lower edge.
• the closing body has the taper 43, which comprises flats 40 on the opposite side, which serve as an assembly aid.
• the closing body 35 has a coaxial longitudinal bore 41.
• the longitudinal bore 41 serves to receive the other end of the spring 36.
• the described cartridge according to the invention can be very easily installed outside a fitting, a pipe section or a housing and then used accordingly, so it has considerable economic advantages.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Safety Valves (AREA)
• Measuring Temperature Or Quantity Of Heat (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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Citations (4)

• 1995
  • 1995-03-03 DE DE19507412A patent/DE19507412A1/de not_active Withdrawn
• 1996
  • 1996-02-29 WO PCT/EP1996/000818 patent/WO1996027750A1/de not_active Application Discontinuation
  • 1996-02-29 CZ CZ19972751A patent/CZ286775B6/cs unknown
  • 1996-02-29 PL PL96322027A patent/PL179179B1/pl unknown
  • 1996-02-29 EP EP96906718A patent/EP0813662A1/de not_active Ceased
  • 1996-02-29 TR TR97/00886T patent/TR199700886T1/tr unknown

Patent Citations (4)

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