DE2007436A1 - Security pressure reducer - Google Patents

Description

13/2/1970 ■ ''

Mr. Jean MARIE

"Security Print Miriderer"

The invention relates generally to pressure reducers, to reduce the pressure of a medium to a substantially constant and lower value and relates in particular the pressure reducers for installation between a distribution network of fuel gas under high pressure and the consumer equipment facing this gas under a constant and low Pressure, essentially independent of the required amount, is to be supplied.

The pressure reducers used for this purpose Art usually have a relief valve, which by -one of the opposite pressure forces of the relaxed medium and a return spring exposed .Membrane is actuated.

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This structure is sufficient to ensure the essential function of the pressure reducer, which is the pressure • to reduce the medium to an essentially constant value, but very often organs must be assigned to this pressure reducer capable of taking on the safety functions required for the distribution of fuel gas; these can in particular consist of a safety valve that closes in the event of a pressure failure and of a stopcock that controls the Delivery of the gas to the relevant system is interrupted, e.g. if this system fails.

The purpose of the invention is therefore a pressure reducer and to create pressure regulators for a medium which, from a structural point of view, is designed in such a way that it can be used as a safety valve and can work as a stopcock.

Numerous pressure reducers and pressure regulators which have these two functions are already known in the art. However, the known devices have the following disadvantages: They are complicated, space-consuming, and their manufacturing costs are not only tall, they are difficult to install and maintain.

Another object of the invention is accordingly to create a pressure reducer and pressure regulator which is suitable to work as a safety valve and stopcock that has a simple and solid structure with small dimensions, and whose control and safety mechanisms are very easily accessible.

Another disadvantage of the known pressure reducers of this type is that when they work as a safety valve an additional displacement of the pressure membrane is required, which causes its early shutdown can, so that the size of the pressure reducer increases Need to become; Furthermore, the manual switch-on and control means built into the pressure reducer generally work directly on the pressure membrane, so that they have to be very strong and their actuation requires considerable effort.

Thus, another object of the invention is to provide a pressure reducer of this type that is suitable iat to work as a safety valve without an additional stroke being required for the pressure membrane, and in which

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the manual switch-on "and control means" indirectly to the Act on the membrane by means of a force transmission.

A pressure reducer according to the invention is expedient and · Pressure regulator of the medium, "ordering from one Expansion valve, which through one of the opposing pressure forces of the relaxed medium and a pressure membrane exposed to a return spring "is actuated, characterized in that that this return spring, which is arranged in a side extension of the pressure reducer housing, is connected to this membrane via a linkage is connected, which has an escape mechanism by means of which this membrane is released from its return spring .sobald its stroke has reached a certain deflection, which corresponds, for example, to the maximum opening of the expansion valve, which in the closed position is directly loaded by an auxiliary spring. ■

As can be seen through the arrangement of the Retraction spring in a lateral extension of the housing, the dimensions of the pressure reducer can be reduced; through the rod built between the pressure membrane and its return spring, any desired translation can be achieved. The escape mechanism raises the additional stroke required the mambran when the pressure reducer works as a safety valve on; Advantageously, the manual switch-on and control means of the pressure reducer mounted in the lateral extension of the housing, so that its dimensions are further reduced and the translation introduced by the linkage can be made use of, while at the same time the Removal is facilitated for maintenance. Ultimately, it becomes your own Inertia of the moving parts of the pressure reducer reduced, so that a proper pressure regulation of the relaxed medium is guaranteed, while the complementary Frictions and play of the mechanism cause resilience, which the flap of the expansion valve vibrates hinders. .

Further essential features and advantages of the inventive Pressure reducers and pressure regulators are used in the following. Description based on two exemplary embodiments, which are shown in the accompanying drawings, explained in more detail.

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- Figure 1 shows in axial section an inventive Pressure reducer and pressure regulator for a medium that has two expansion stages and as a safety valve and Stopcock is used;

- Figures 2 and 3 show a partial section of the pressure reducer shown in Figure 1, whereby the Intersection lines are designated by II and III, respectively;

- Figure 4 shows · an axial partial section through the pressure reducer shown in Figure 1 after the safety valve has tripped;

- Figure 5 shows a variant in an axial partial section the pressure reducer of Figure 1;

- Figure 6 shows the pressure reducer of Figure |; in partial section, the section line being denoted by VI.

The pressure reducer shown in Figures 1 to 4 comprises a housing 10 formed by a central tubular Part 11, which is a central transverse partition 12, from which an inlet port R E and an outlet port R S open on both sides, and two covers 13, 14 with those of the outer circumference of the pressure membranes M1, M2 on the end wings of the middle part are braced. The interior of the housing 10 is thus divided into four successive compartments divided, with the two compartments located at the ends under atmospheric pressure by means of the lids 13, 14 are arranged air vents, while the one hand of the partition 12 arranged middle compartments, the one with the * Inlet connection R E via a first expansion valve S1 and the other communicating with the outlet connection R S, the middle compartments via a cross through the partition 12 arranged second expansion valve S2 are connected. The middle part 11 and the cover 13,14 further comprise laterally arranged spaces 15 and 17, 18, which are parallel to Axis of the housing 10 are aligned to form a lateral extension in which most of the organs are housed are causing the pressure reducer to puncture the safety valve and the stopcock can meet.

Overloaded from the pressure reducer under high pressure The gas taken up the inlet connection R E is first expanded through the valve S1, which is actuated by the pressure membrane M1

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is that the opposite compressive forces of the relaxed Medium below the valve and via a linkage that is subsequently is described, the elastic pressure of a return spring RI is exposed, which is in de.m lateral space 15 of the central part 11 of the housing 10 is arranged, this spring on a transverse central partition wall 16 of the compartment 15 is supported. The valve S1 comprises essentially a flap 20, the head of which, guided in the bore of the inlet connection R E, interacts with a sealing seat 21 formed through the base of the connection, and its end piece 22 on one arm of an angle lever 23 rotatable about a fixed axis 24 is traversed, "the other arm of which one with the membrane M1 connected bracket 25 traverses; one on the partition wall 12 of the middle part 11 supporting auxiliary spring 26 tries the lever 23 to tilt in one direction, in order to bring about the closing of the valve S1. On the opposite of bracket 25 The membrane MI carries a surface with its support plate connected sleeve 27, on the one hand on a with the cover 13 a part-forming axis 28 slides around the To guide membrane M1 during displacement and the other side arranged according to a transverse axis roller 29 carries, this Roll with the above linkage that the membrane MI with the spring R1 connects, cooperates. This linkage will described below.

The linkage essentially comprises a lever 30 which is tiltably arranged on an axis 31 connected to the cover 13 is, wherein one end of the lever designed as a fork comes into contact with the rollers 29, which on the with the membrane M1 connected 'sleeve 27 are attached; the other end of the lever 30 penetrates into the lateral space 17 of the cover 13 a, and comes into contact with a roller 32 on a die both arms of a U-shaped lever 33 traverse Axis is arranged, this lever on the movable. Ansehlag 35 of the return spring R1 is hinged, which is slidable Is slidable in the lateral space 15 of the central part 11 of the housing of the pressure reducer. Thus becomes the pressure of the return spring R1 on the movable stop 35 Transfer via the lever 30 to the membrane M1> in order to reduce the pressure exerted on the membrane by the relaxed medium

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balance forces. -. ■

The just Idesehrebenen linkage also includes one Escape mechanism to keep the diaphragm M1 from its return spring R1 to be solved, e.g. if there is a leak below the pressure reducer occurs, wherein the return spring tries to move the diaphragm over a position that the full opening of the Relaxing g-valve S1 corresponds to. The escape mechanism consists essentially of the lever 33, a needle-like spring 34 attempting this lever in the opposite direction Direction of the clock hands on Figure 1 so that the rollers 36 mounted on the same axis as the roller 32 and 37 on the parallel paths formed by inner projections of the cover 13 in the lateral space 17 38, 39 stay in the facility. Thus, it is clear from Figure 1 that when the diaphragm moves away from its depicted Moves position in the direction that corresponds to the opening of the valve S1, so press the webs 38, 39 gradually the rollers 36, 37 back to the right by tilting the lever 33 clockwise, allowing for a certain displacement of the membrane M1, which e.g. corresponds to the full opening of the valve S1, the right end of the lever 30 of the roller 32 escapes, as can be seen in Figure 4; thus through relaxation the spring R1 of the lever 33 is pushed back towards the bottom of the room 17 to the lower end of the tracks 38, 39 and on the other hand, the valve S1 is simultaneously in the illustrated closed position by the cooperation of the auxiliary spring 26 and the pressure of the medium acting on the membrane M1. Through the escape mechanism just described the pressure reducer can work as a safety valve when the normal pressure release pressure of the medium and above all of valve S1 cannot be reached, e.g. because of a Interruption in distribution, failure of the pressure reducer or a leak below the latter.

The pressure reducer includes manual actuation means for re-setting it after it has been under the above conditions has been triggered: The movable stop 35 of the return spring R1 is expediently connected to a rod 40, which is arranged in the axis of the compartment 15 and

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extends through the central opening of the partition wall 16 to the side "compartment 18" of the decked-S 14; the free 'end of the rod '40 comprises a transverse slot in which a pin "41 slides", the ends of which are guided through arranged in the wall of the compartment axial grooves 42, this pin as a movable "stop ^{1 a:} is transverse to the Partition '16 of the compartment 15 supporting spring 43 is used; further traversed eiii. ' second pin 44 arranged perpendicular to pin 41, the slot located at the free "end of rod 40; the free ends of the pins 41 and 44 cooperate with two spiral paths 45 formed on a part 46, this part being rotatably arranged in the lateral compartment 18 of the cover 14 and being axially supported on a plug 19 closing this compartment; a rod connected to part 46 traverses this plug 19, the end of which facing outwards is provided with .einem square 47 in which a key 48 is mounted.

Under the normal working conditions of the pressure reducer - and as can be seen from FIG to allow the free relaxation of the spring R1 and consequently ^T the free deflection of the membrane M1. If the pressure reducer works as a safety valve under the conditions described above, the spring R1 relaxes until the pin 44 ^{comes to the pin 41: the} stop, which is located on the tracks 45 of the part 46 by the elastic force of the Spring 43, which is larger than that of the spring R1, is supported; In order to re-set the pressure reducer, the key 48 is actuated so that the pin 41 is released and thus enables the compression of the return spring R1 by releasing the spring 43 and consequently the new setting of the escape mechanism. The key 48 can then be returned to its initial position shown in Figure 1 in order to enable the pressure reducer to operate freely. . · ■. _: . . . β ^ α ¹ -

.If the key 48 is moved from its starting position _: during normal operation of the pressure reducer, the pin 41 released by the path 45 enables the

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Spring 43 which compresses the return spring R1 by moving the movable stop 35 into the position shown in FIG Position is returned; the auxiliary spring 26 thus closes the valve S1. The pressure reducer then works as a stopcock. The pressure reducer will then return to its normal operating mode offset by simply turning the key 48 in its initial position.

The pressure reducer described as an example comprises a second expansion stage, essentially consisting of the valve S2, which is arranged in the partition wall 12 of the central part 11 of the pressure reducer housing, the as annular Seal formed flap 50 of this valve a through the partition wall 12 has guided end piece 51, which is traversed by a tiltable about a fixed axis 53 lever 52, the a bracket 54 connected to the membrane M2 crosses, the return spring R2 arranged in the cover 14 opening directly this membrane acts. Most of the relaxation process takes place in the first stage, the second expansion stage a fine regulation of the pressure of the supplied to the system Gas allows and can possibly have arrangements that this pressure of the required amount of gas or other Adjust parameters.

In the variant shown in Figures 5 and 6 of the pressure reducer were only the linkage and that connecting the membrane M1 with its return spring R1 Changed escape mechanism. The lever 30 was replaced by a lever 60 whose fork-shaped end with the

Rollers 29 come into contact carried by the sleeve 27 connected to the membrane M1; The lever 60 is suspended from two rocker arms 61, 62 which are articulated on an axis connected to the cover 13 ', a stop 63 on the cover 13' limiting the rotation to the right on the figure 5 by means of a spring 64. The lever 60 has a cutout in which a transverse roller 65 is arranged, which is in contact with a cone 66 , the end piece screwed into the cover 13 ^{1 of} which is blocked by a lock nut 67. The end of the lever 60 inserted into the lateral compartment 17 ′ of the cover 13 ′ has an angular fold 68 into which one at the fork-shaped end 69

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of the rod 4O ¹ , which is connected to the movable stop 35 'of the. Return spring R1 is connected, arranged roller 32 'is inserted.

You can immediately see that when the expansion of the spring R1 reaches a sufficient deflection with the displacement of the membrane M1, e.g. the maximum opening of the expansion valve corresponds, the cone 66 pushes the roller 65 to the left and consequently the lever 60, so that the roller 32 ' emerges from the fold 68; then the spring relaxes R1 unrestrained, as in the embodiment previously described, while the lever 60 on the one hand via the springs. 64 and on the other hand by the return movement of the membrane M1 in its rest position when the expansion valve closes, in its original position is returned. Of course the stroke of the membrane MI, at which the pressure reducer, automatically triggered, arbitrarily regulated by the cone 66 is adjusted.

The pressure reducer according to the invention in the described and illustrated embodiments has numerous advantages over similar "known devices, whereby it ensures the triple function as a pressure reducer and pressure regulator of a medium, as an automatically operating safety valve and as a shut-off valve with manual actuation Control and safety devices in a lateral extension of the housing, the dimensions of the pressure reducer are considerably reduced, so that its installation is facilitated; the linkage built between these devices and the pressure membrane creates a reduction, whereby the setting and manual operation of the pressure On the other hand, the inertia effect of the parts used and the combined play creates a hysteresis in the operating mode of the first "relaxation stage, so that the vibrations of the flap are dampened without affecting the pressure regulation is intruded. It should also be noted that if the pressure reducer works as a safety valve, this takes place without an additional shift of the pressure membrane, the stroke of which is therefore completely active; as a result, the membrane is less stressed, so that its service life is increased . Finally, there are the safety and manual controls in a lateral approach to the housing

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are arranged, their maintenance and repair can be carried out without the need to use the pressure hinderer to be fully expanded.

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Claims (11)

..-, .- ..,. - ... r.- Ρ..Α.ΐ! Ε, Ιΐ AJS -PR TJC HE -,. . ,; : M.JEiEL Druckr-Minderer "and ^ -Regler -für ein.Medltun 'consisting of a relief valve which is actuated by a pressure membrane exposed to the opposite pressure effects of the relaxed medium and a return spring, characterized in that the in a lateral approach of the Housing of the pressure reducer arranged return spring Ri is connected to the membrane M1 via e ± n rods with an escape mechanism that separates this membrane from its return spring as soon as its displacement has reached a certain value, which corresponds to the maximum opening of the expansion valve S1, for example , which is loaded directly in the closing position by an auxiliary spring 26. 2. Pressure reducer and regulator according to claim 1, characterized in that the linkage consists of a lever 30, 60 which connects the membrane M1 with its return spring R1 and that the escape mechanism comprises means such as cams 38-39, 66, with which the lever is separated from the springs or this membrane when its angular adjustment reaches a certain value, the. eg corresponds to the * 'maximum opening of the expansion valve S1. 3. A pressure reducer and regulator according to claim 2, characterized characterized in that the return spring R1 is on a movable Stop 35, 35 'acts, which normally moves at a free end of the lever 30, 60, and that the designed as a cam means 38-39, 66 the lever of the separate the movable stop by causing their relative lateral displacement. 4. Pressure reducer and regulator according to claim 3, characterized in that the movable stop 35 is a tilting element 33, which on the one hand comes into contact with the free end of the lever 30, which is arranged on a fixed axis, and that on the other hand with the aid of elastic retraction means 34 against at least one inclined to the displacement direction of the movable stop arranged web 38-39 is held in the stop. 5. Pressure reducer and regulator according to claim 3, characterized in that the lever 60 arranged on a laterally displaceable movable axis is held in the stop with the aid of elastic retraction means 64 against at least one path 66 arranged obliquely to the displacement direction of the lever 00983.7 / 1430 6. Pressure reducer and regulator according to claim 3, 4 or 5, characterized in that it comprises adjusting means to the to bring movable stop 35, 35 'with the free end of the lever 30, 60 in connection. 7. Pressure reducer and regulator according to claim 6, characterized in that the adjusting means comprise a spring 43, which exerts a greater force on the movable stop 35, 35 'that is opposite to that of the return spring R1, which, however, is normally ineffective by manual actuation means. 8. Pressure reducer and regulator according to claim 7, characterized characterized in that the manual actuation means provided cause the expansion valve S1 to close. 9. Pressure reducer and regulator according to claim 7 or 8, characterized in that the lateral extension of the housing 10 delimits a bore 15-17-18 with a central partition 16, on which the springs R1, 43 are supported on both sides and which is traversed by a rod 40, 40 ', one end of which with the stop 35, 35 'slidably arranged in the bore connected, and the other free end with the adjustment and manual control means cooperates. 10. Pressure reducer and regulator according to claim 9, characterized characterized in that the free end of the rod 40, 40 'has a slot in which the movable stop of the The transverse pin 41 forming the spring 43 is arranged, the ends of which are arranged in axially aligned in the wall of the bore 18 Mutes 42 are guided, which come into connection with the spiral paths 45, which consist of freely rotatable, however be formed in the bore secured against axial displacement part 46, this part with an external control member 48 is connected. 11. Pressure reducer and regulator according to claim 10, characterized in that the slot is at the free end of the rod 40, 40 'is traversed by a fixed pin 44 or the like which is axially and angularly offset from the pin 41 is and with the tracks 45 of the part 46 in connection. Comes in order to enable the closing of the valve S1 by hand. 009837 / U30 Blank page