EP3665415A1

EP3665415A1 - Safety system for a pressure accumulator

Info

Publication number: EP3665415A1
Application number: EP18758832.2A
Authority: EP
Inventors: Thomas Kreutzer; Thomas GÖTZ
Original assignee: Hydac Technology GmbH
Current assignee: Hydac Technology GmbH
Priority date: 2017-08-12
Filing date: 2018-08-09
Publication date: 2020-06-17
Anticipated expiration: 2038-08-09
Also published as: EP3665415B1; DE102017007628A1; JP2020529553A; US11112062B2; JP7261180B2; US20200149683A1; CN212029152U; KR20200038939A; WO2019034529A1; KR102608476B1

Abstract

The invention relates to a safety system with a valve block (10) to which at least one gas safety valve (12, 14) is detachably connected, comprising at least one controllable valve (50, 52, 58) in or on the valve block (10) and at least one pressure accumulator (42) that receives a gaseous pressure medium and is also detachably connected to the valve block (10). The invention is characterised in that a gas-conducting connection extending at least in sections in the valve block (10), between the respectively connected pressure accumulator (42) and the respectively connected gas safety valve (12, 14), can be locked or released by means of the valve (50, 52, 58).

Description

security system

The invention relates to a safety system with a valve block to which at least one gas safety valve is connected in a preferably removable manner, with at least one controllable valve in or on the valve block and at least one gaseous pressure medium receiving accumulator connected to the valve block in gleichfal ls removable manner is.

Such a safety system is used in a variety of hydraulic supply systems and is, for example, from the product catalog "Storage Technology" with the company's D No. 3.553.4 / 03.1 6

HYDAC I NTERNATIONAL known. The known solution is used for filling and testing of hydro-storage systems with so-called secondary configuration. Here, the known valve block has various fluid connections, in particular for the connection of a filling and testing device, a pressure gauge, downstream nitrogen bottles, a pressure accumulator in the form of a hydraulic accumulator and at least one gas safety valve. During operation of the valve block, the hydraulic accumulator, preferably in the form of a piston accumulator, is permanently connected to its gas side with the gas safety valve. The liquid side of the hydraulic accumulator, which is separated from the gas side via a separating element, such as a separating piston which can be longitudinally guided in a storage housing, is connected to a hydraulic supply system, for example in the form of a conventional hydraulic working circuit. Furthermore, in the Valve block a shut-off valve present, the fluid path between the possibly connected, downstream nitrogen bottles and the hydraulic accumulator releases in its open Stel ment for a gas-conducting connection with the nitrogen gas and blocks this fluid path in its closed position.

When the respective gas safety valve is removed from the valve block, for example during maintenance or repair work, then the entire working gas under operating pressure must always be released from the safety system, with the respectively connected hydraulic accumulator and / or the respectively connected nitrogen bottles being closed and at least parts of a connected hydraulic system must be depressurized accordingly. Upon subsequent recommissioning of the safety system, including the associated gas safety valve and correspondingly connected pressure accumulators, the above-mentioned style I positioning steps can be undone.

Based on this prior art, the invention has the object to provide a security system with improved functionality and to conserve resources.

A related object solves a security system with the features of claim 1 in its entirety. Advantageous embodiments of the invention are the subject of the dependent claims.

Characterized in that according to the characterizing part of claim 1, a running at least partially within the valve block gas-conducting connection between the respectively connected pressure accumulator and the respective connected gas safety valve by means of the valve lockable or is releasable, is a particularly high security reached. The respective gas safety valve can be removed if necessary from the valve block, provided that the associated valve in or on the valve block brought into its blocking position and is so far safely separated from the respective gas pressure accumulator connected from a hydraulic accumulator or a gas storage, such as a nitrogen cylinder or other , at least partially gas-carrying pressure vessel, such as a storage tank or the like, is formed.

The safety system according to the invention opens up the possibility of shutting off the gas safety valve connected to the valve block of the safety system via an associated controllable valve without suffering substantial gas losses on the side of the respective pressure accumulator system connected to the valve block and without depressing hydraulic system components.

The required during repair and / or maintenance of a gas safety valve from the valve block of the safety system can be carried out quickly and inexpensively and time-consuming emptying and Befüllvorgänge on the gas side of a so far connected system with the respective pressure accumulator can be omitted, which is resource-saving so far , This has no equivalent in the prior art.

Pressure accumulator according to the invention include all for receiving a fluid, in particular a gas, suitable and used containers, such as pressure vessels, hydraulic accumulator, gas cylinders, in particular nitrogen bottles, and the like. It is understood that the accumulator used in the security system according to the invention is not limited to the usual language definitions in individual areas. In a preferred embodiment of the security system according to the invention, the respective pressure accumulator is a pressure vessel which is exclusively filled or filled with the gaseous pressure medium, such as a nitrogen cylinder or a hydraulic accumulator, in particular in bellows, membrane, accumulator or piston design Separator housed in a storage case separates a gas side from a liquid side. In this way, with only one safety system, various types of pressure accumulators, which are connected only to a valve block, certainly dominate, which is the case regularly, if on one side of the valve block at least one hydraulic accumulator is connected as a pressure accumulator to a hydraulic system and on the same or another side of the valve block additional nitrogen bottles are connected as storage or Nachschaltflaschen, the same at Hergestel older fluid supply the hydraulic accumulator on its gas side during operation reload or increase its bias on its gas side during operation.

In a further preferred embodiment of the safety system according to the invention, at least two gas safety valves are connected to the valve block, it being ensured by means of a safety device that for removing a gas safety valve from the valve block, the gas-conducting connection to the respectively connected pressure accumulator is interrupted and leading to at least one other gas safety valve Connection is maintained such that a permanent gas-conducting connection between this respective pressure accumulator and this respective other gas safety valve during the change process of a gas safety valve and its re-commissioning is hergestel lt. In this way, the operation of a hydraulics, at least partially gas-conducting system maintained, even if a gas safety valve is removed from the valve block, since the safety valve remaining on the valve block a gas safety valve fully assumes the safety functions mentioned.

In particular, with the safety system according to the invention, it is ensured that, during commissioning and during continuous operation of a hydraulic supply system, the gas safety valve set to a maximum response pressure is permanently connected to the gas side of the pressure accumulator connected from its liquid side to a hydraulic system or system remains connected in the form of a hydraulic accumulator. In particular, in gas safety valves used repeatedly on the valve block can for cleaning and / or maintenance purposes of such a gas safety valve this decrease from the valve block, while the other, remaining on the valve block gas safety valve further perceives the safety function described for the hydraulic supply system together with its parts. Regularly such gas safety valves are formed from pressure relief valves, whose gas outlet side leading to the environment is covered by a mesh grid or a sieve in order to protect any nearby persons staying in the event of security from the outflowing compressed gas of high pressure.

In a preferred embodiment of the safety system according to the invention, the safety device is based on a mechanical locking concept, a mechanical control concept, an electrical monitoring concept or a chip-controlled actuation concept for the respectively controllable valve. Due to the requirement-based, adapted to the particular application design of the safety device a secure shut-off of the pressure accumulator is ensured during operation with low interference and error rate, for example, before acceptance of an associated gas safety valve. Mechanical concepts for locking or valve control offer the advantage of a high degree of Robustness and a low maintenance intensity. An electrical or chip-controlled concept for monitoring or actuation offers the advantage of a small space requirement and the possibility of remote monitoring when using a corresponding data transmission.

In a further preferred embodiment of the safety system according to the invention two, preferably manually operable, ball valves are provided for the realization of a mechanical locking concept, which are each gas-conducting connected to a assignable gas safety valve and wear the control discs that ensure in a mutually locked state that a ball valve in his opened position the associated gas safety valve with the pressure accumulator via a gas-conducting connection connects and the other ball valve in its blocking position for removal of the associated gas safety valve, for example, for replacement or maintenance purposes, blocks from the valve block an associated other connection to the respective pressure accumulator.

The control disks are an integral part of a mechanical locking of the actuating elements of the ball valves and preferably arranged on an outer side of the valve block. As soon as a ball valve is blocked to remove the associated gas safety valve, the associated control disc is locked in such a way with at least one control disc of another gas safety valve that the other gas safety valve is blocked in the open, safe position and securely held. Thus, when removing and removing a gas safety valve at least one functional further gas safety valve is connected to the valve block in its open position, which then only performs the safety function. In a further preferred embodiment of the invention is by means of two hand lever of the ball valves, starting from a common opening direction, one of the control discs in the direction of a closed position of the ball valve actuated, the outer peripheral side has a cut, with a correspondingly formed cutout on the outer circumference of the other Control disc cooperates such that a rotational movement of the respective ball valve is enabled or blocked by means of the associated hand lever. Particularly preferably, the respective cutout has an arcuate contour with a curvature comparable to the outer circumference of the control disk. In such a shaped cut the other control disc engages in such a way that the associated hand lever blocked in the selected position and an unintentional or deliberate change of this position is not possible. The gas safety valves have a cylindrical basic shape and are arranged on an underside of the valve block. The hand lever for actuating the associated ball valves are preferably arranged on a side accessible to an operator side of the valve block, wherein usually a vertical direction, the open position and a horizontal direction indicates the closed position of the associated ball valve. Particularly preferably, the cutouts in adjacent hand levers are arranged such that in the open position of the two hand lever, the cutouts are arranged opposite each other and opposite each other such that upon movement of a hand lever in the Sehl ieß- position the associated control disk in the cutout on the other control disk the other hand lever is moved while blocking their movement also in the closed position.

Preferably, two or more gas safety valves are arranged side by side, forming a row, on the valve block. Accordingly are two or more hand lever with associated control discs side by side, forming a row, arranged on the side of the valve block.

It is also advantageous that the control disc cooperates with a stop limit on the valve block such that the hand lever from an opening direction paral lel to the longitudinal direction of the respective igen gas safety valve by 90 ° in a blocking Stel development transversely to this longitudinal orientation and vice versa is pivoted. H here comes the advantage of error-free operation when pivoting the respective hand lever in one of his Stel settings.

In a further preferred embodiment of the security system according to the invention is for the Realization of a mechanical control concept as a controllable valve, a 3-way ball valve used in its one switching Stel development of a gas safety valve via a connection to the accumulator gas-conducting connects and another gas safety valve by locking a associated other connection from the pressure accumulator decoupled, wherein in another switching Stel development the other gas safety valve via the other connection to the pressure accumulator gas-conducting connected and a gas safety valve is decoupled by blocking the one connection. By using only one 3-way ball valve, two separate ball valves for the two gas safety valves can be omitted. Regardless of the switching Stel development of the 3-way ball valve but then a gas safety valve is connected to the accumulator and a gas safety valve thereof separated so that at least one gas safety valve takes over the safety function for the pressure accumulator.

In a further preferred embodiment of the security system according to the invention, the position of the respectively controllable valve is monitored for its realization of an electrical monitoring concept by means of a sensor system in its opening and / or closing position, and an operation of the hydraulic supply system is enabled by a higher-level control only when the sensor detects and transmits to the controller that the respective gas-conducting connection between gas safety valve and accumulator is actually released via the controllable valve. This results in the advantage that an opening or locking of the gas-conducting connection can be detected "automatically." By means of an additional optical display, for example attached to an outer side of the valve block, an operator can be notified of the release for removing the gas safety valve, if this other gas safety valve performs the safety function.

In a further preferred embodiment of the security system according to the invention, a control chip is provided for the implementation of a chip-controlled actuation concept, which enables operation of the control system of the hydraulic supply system, but removes the supply system when it is removed and, when it is used on the controllable valve, the respectively assignable gas safety valve then decoupled from the pressure accumulator on the gas side by blocking the associated connection. Conversely, an operation of the hydraulic supply system is only possible when the control chip after removal releases the gas safety valve back to its open position and this chip re-used on the controller allows the operation of the connected hydraulic system again.

It is further advantageous that the valve block has at least one further supply port, via which at least one further pressure accumulator, preferably a gas pressure accumulator, can be connected, which via a valve disposed within the valve block check valve in its open position with the respective pressure accumulator gas-conducting connected, preferably at the gas side of a hydraulic accumulator is connected. over The further supply connection can then in particular be taken from the gas reservoir of the storage cylinder and passed to the gas side of the hydraulic accumulator in order to increase the working capacity of this hydraulic accumulator.

It is also advantageous that the valve block has at least one further connection point, to which a filling and testing device can be connected, which connected directly to the pressure accumulator via a filling and test connection in the valve block, preferably connected to the gas side of a hydraulic accumulator in the form of a piston accumulator , Is, and that this filling and test connection is connected via a check valve which opens in the direction of the respective controllable valve to a further connection between the respective further pressure accumulator and the pressure accumulator. Characteristics of the gas, such as temperature and pressure of the gas volume, can be monitored and recorded via the filling and testing device.

If a hydraulic supply system is usually connected to the above-described hydraulic accumulator on its liquid side, the safety system according to the invention ensures that in the event of a malfunction, as may also be caused by a fire, it is not unintentional to increase the pressure on the gas side of the hydraulic accumulator can come because over the opened

Valve device, or the ball valve is in the open position ensures that when a maximum pressure is set to the respective gas safety valve, gas with higher pressure on the hydraulic accumulator side can escape directly into the environment. In this way too high pressure on the liquid side of the hydraulic accumulator and on the side of the supply system, which could lead to the destruction of system parts, is immediately reduced, so that a danger to operators at the system components of the supply system is avoided. tems is eliminated. The safety system further ensures that manual misoperations, which could lead to unsuccessful stoppage of the function of the gas safety valve, have been eliminated. Further advantages and features of the invention will become apparent from the figures and the following description of the drawing. According to the invention, the abovementioned features and the further mentioned features can be realized individually or in any desired combinations on a safety system according to the invention. The features shown in the figures are purely schematic and not to scale I understand. Show it:

Fig. 1 a to 1 c jewei ls a side view of an embodiment of a valve block of a safety system with difference I lesser Actuate lungs of individual nen Gassicherheitsventi len associated hand lever n;

Fig. 2 is a perspective view of the Venti lblocks

Fig. 1 b;

3a and 3b show a circuit diagram for a first exemplary embodiment of the safety system according to the invention;

4 shows a circuit diagram for a second exemplary embodiment of the safety system according to the invention;

5 shows a circuit diagram for a third exemplary embodiment of the safety system according to the invention; 6 shows a circuit diagram for a fourth exemplary embodiment of the safety system according to the invention; and 7a and 7b each show a perspective view of a further embodiment of the security system according to the invention.

1 a to 1 c show a side view of a valve block 10, on the underside of which a first gas safety valve 12 and a second gas safety valve 14 are arranged. The gas safety valves 12, 14 are each assigned a chick of a ball valve 50, 52 (see FIGS. 3a, b) which is present in the housing of the valve block 10. The chicks of the ball valves 50, 52 are arranged switchable back and forth between a switch open position and a closed switch position via a first hand lever 16 and a second hand lever 18, respectively. In the switching position of the two hand levers 16, 18 shown in FIG. 1a, these are each aligned in the vertical direction, parallel to the cylindrical gas safety valves 12, 14, and thus shown in their open switching position. In the closed switching position, the associated hand lever 16 or 18 is aligned horizontally, as shown in Fig.1b for the second hand lever 18 and in Fig.1c for the first hand lever 16. While the hand lever 16 is running straight, the other hand lever 18 has a crank, so that it can be swung over the hand lever 16 if necessary (see Fig. 2). In the closed switch or closed position, the connection to the gas side 45 of a pressure accumulator 42 (see Figures 3a and 3b) not shown in Figures 1a to 1c is separated via the associated ball valve 50 or 52 and the decrease of the associated gas safety valve 12 or .14 possible in a secure manner, which will be explained in more detail below.

Spaced apart from the juxtaposed hand levers 16, 18, a third hand lever 20 is arranged on the outside of the valve block 10, via which a supply port 22 associated Kü- ken another third ball valve 54 (see Fig.3a, b) is operable. The connection 22 is arranged in the direction of the figures 1a, b, c and 2 at the bottom of the cuboid valve block 10. In a side surface of the valve block 10 shown on the right in FIGS. 1 a to 1 c, a filling and test connection point 24 is formed for a gas-filling and testing device, not shown further, and at the top of the valve block 10 is a pressure connection 26 for a Connection of the accumulator 42 available. Further, a measuring device 28 is provided in the form of an electrical pressure transducer on the upper side of the valve block 10. A pressure gauge connection 34 for a pressure gauge 44 (see FIGS. The first and the second hand lever 16, 18 are each connected to a circular control disc 30a, 30b, which are each arranged coaxially to the axis of rotation of the associated hand lever 16, 18 on the front end side of the valve block 10. The third hand lever 20 has a conventional disc 30c for limiting rotation.

The ring-shaped control disks 30a, 30b for the hand levers 16, 18 each have a segment-wise and concave-shaped cutout 32a, 32b with a curved contour. In the open switching position of the two hand levers 16, 18 shown in FIG. 1a, the two cutouts 32a, 32b are arranged opposite one another. The configuration and arrangement of the cutouts 32a, 32b is selected such that when the second hand lever 18 is moved clockwise into the closed switching position, comparable to the representation according to FIG. 1b, the second control disk 30b on the outer peripheral side with its outer convex outer contour in the first, concave recess 32a is forcibly moved on the first control disk 30a of the first hand lever 16. As a result, the first hand lever 16 is mechanically locked in the open, vertical switching position shown by the control discs 30a, 30b. In a comparable manner, the first control disk 30a with their convex or arcuate outer periphery on movement of the first hand lever 16 in a clockwise direction in the closed switching position, as shown in Figure 1c, in the second, concave cutout 32b on the second control disk 30b moves into it and accordingly the second hand lever 18 in the in FIG. 1c securely locked open, vertical switch position shown.

On the valve block 10 are further two pin-like projecting stop boundaries 15a, 15b are provided, each defining the rotational movement of the associated hand lever 16, 18 by 90 ° in the open and the closed switching position and adjacent to the cutout 32a, 32b of the respective control disc 30a, 30b trained Collapse stop lugs. The pertinent limit stop is common in ball valves, so that will not be discussed further here; In particular, individual details have been omitted in the figures for clarity. FIG. 2 also shows a limit stop 15c for a nose formed on the control disk 30c, which limits the corresponding rotational movement of the third hand lever 20.

3a shows a hydraulic circuit diagram for a first exemplary embodiment of the valve block 10 with a first valve connection 36 (see FIG.1a) for the first gas safety valve 12 and a second valve port 38 (see Fig.1b) for the second gas safety valve 14th At the supply connection 22, by way of example, two further pressure accumulators 40a, 40b, designed as gas accumulators in the form of conventional nitrogen reloading bottles, are connected to the valve block 10. Furthermore, a pressure accumulator 42, formed as a pressure vessel filled exclusively with a gaseous pressure medium in the form of a nitrogen cylinder, is connected to the pressure port 26. At the pressure gauge port 34 is the pressure gauge 44 and at a measuring port 48, the measuring device 28 is connected. The Pressure gauge 44 and the measuring device 28 übl icher type are on Schnel lschlusskupplungen 46 a, 46 b connected to the associated terminals 34 and 48 on the valve block 1 0 fluid and pressure leading. With the solution according to FIG. 3a, among other things, the pressure accumulator 42 can be filled with nitrogen from the reloading bottles 40a, 40b. The filled memory 42 can then be taken from the valve block 10 filled and a new memory 42 in turn befül lt. In that regard, could replace the individual storage bottles 40a, 40b a supply network (not dargestel lt) from which the memory 42 can then be filled. Instead of an exemplary pressure accumulator 42 in the form of a gas storage bottle, a large number of such gas-carrying accumulator systems can also be connected to the connection 26 of the valve block 10 (not shown). In the valve block 10, a plurality of interconnected fluid connections between the first valve connection 36, the second valve connection 38, the supply connection 22, the pressure connection 26, the filling and test connection point 24, the measurement connection 48 and the manometer connection 34 formed. Typically, the compounds are introduced as bores in the valve block 10 manufactured from a metal material. From the first valve connection 36, a first connection section 21 leads to a first intersection point 23, from the second valve connection 38 a second connection section 25 to a second intersection point 27. The first intersection point 23 and the second intersection point 27 are arranged in a third connection section 29, which extends from Measuring connection 48 to a third intersection point 31 in the interior of the valve block 1 0 runs.

A fourth connection section 33 extends from the supply connection 22 to the pressure connection 26. In the fourth connection section 33, the third intersection point 31 and a fourth intersection point 35 are arranged. The The fourth crossing point 35 is the end of a filling and testing connection 37 beginning at the filling and testing connection point 24. In the filling and testing connection 37, a fifth crossing point 39 is arranged, which terminates at the end of a fifth connection section beginning at the first crossing point 23 In the first connection section 21, a sixth intersection point 43 is arranged between the first valve connection 36 and the first intersection point 22, which represents the end of a sixth connection section 45 starting at the pressure gauge connection 34.

Further, a first line section 47 between the first gas safety valve 1 2 and the first valve port 36, a second line section 49 between the second gas safety valve 14 and the second valve port 38, third line sections 51, 51 a, 51 b see between the other pressure accumulators 40 a, 40b and the supply connection 22, a fourth line section 53 between the pressure accumulator or gas supply bottle 42 and the pressure connection 26, fifth line sections 55a, 55b, 55c between the measuring device 28 and the measuring connection 48 as well as the measuring device 28 Line sections 57a, 57b between the pressure gauge 44 and the pressure gauge port 34 available.

In the connections leading from the gas safety valves 1 2, 14 to the pressure accumulator 42, the first ball valve 50 is arranged in the first connecting section 21 and the second ball valve 52 is arranged in the second connecting section 25. In the leading to the pressure accumulator 42 fourth connecting portion 33 of the third ball valve 54 is disposed between the third 31 and fourth intersection point 35 and paral lel to this a check valve 56 in the fifth connecting portion 41 between the first 23 and fifth intersection point 39 connected in the direction of the first intersection point 23rd opens. The individual ball valves 50, 52, 54 are via the associated hand lever 1 6, 1 8, 20 operated individually by hand. From adjacent to the pressure port 26 arranged fourth intersection point 35 leads the filling and test connection 37 directly to Fül l and Prüfanschlussstel le 24th

3b is essentially identical to FIG. 3a and differs from this solution shown in that anstel le designed as a pressure vessel gas storage bottle 42 designed as a hydraulic accumulator in the form of a piston accumulator pressure accumulator 42 is connected to the pressure port 26 of the valve block 1 0 , On the hydraulic ik- or liquid side 47 of the accumulator designed as a piston accumulator 42 is in the presen- tation of Fig. 3b exemplified a hydraulic isches supply system 43 connected regularly consisting of a hydraulically working group, such as a motor-pump unit, a storage tank, hydraulics Consumers, control and monitoring equipment, etc. (not shown).

As soon as the pressure on the gas side 45 of the pressure accumulator 42 rises due to an impermissible pressure increase, for example caused by a technical fault in the hydraulic supply system 43, such as a fire, a maximum pressure on the gas side 45 of the pressure accumulator 42 is exceeded is specified by the set pressure of the gas safety valves 1 2, 14 causes their triggering and gas can flow from the gas side 45 of the accumulator 42 with valves open in the form of ball valves 50, 52 on the gas safety valves 1 2, 14 until their set pressure of example 330 bar again reached or fallen below. This safety function is also realized when the further pressure accumulators 40a, 40b are separated on the gas side from the gas side 45 of the pressure accumulator 42 by closing the further third ball valve 54. In this case, the pressure compensation takes place via the check valve 56, which is in the direction of the two Gas safety valves 12, 14 opens and as far as the associated, working gas regularly in the form of nitrogen gas leading compounds in the valve block 10 releases for pressure reduction. For the sake of completeness, it should be mentioned that the piston 49 of the accumulator 42 designed as a piston accumulator separates the gas side 45 from the liquid side 47 leading to the supply system 43. In the embodiment of the safety system shown in each case in FIGS. 3a, 3b, it is ensured by the ball valves 50, 52 which can be operated and switched separately from one another that one of the gas safety valves 12 or 14 is always gas-conductively connected to the pressure reservoir 42 via the associated connection. which, as stated, leads to the desired safety gain.

The circuit diagram for a second exemplary embodiment of the safety system shown in FIG. 4 differs from the first exemplary embodiment shown in FIGS. 3a and 3b in that, instead of the two ball valves 50, 52, only one 3-way ball valve 58 is provided in the connections from the gas safety valves 12, 14 to the respective pressure accumulator 42 is arranged. Due to the arrangement of the 3-way ball valve 58, the interconnection of the connections in the valve block 10 is modified such that the first connection section 21 and the second connection section 25 each terminate at the ball valve 58 and from this a common connection section 59 to a common intersection point 61 in the third connecting portion 29 leads. The pressure gauge 44 is also connected to the third connecting portion 29 via the sixth connecting portion 45. The interconnection of the fourth connection portion 33, the fifth connection portion 41 and the filling and test connection 37 are unchanged. The pressure accumulators 40a, 40b, 42 are no longer shown in FIG. 4 for the sake of simplicity. Also, the bottles 40a, 40b do not necessarily have to be connected to the connection 22, which is then to be closed unoccupied. The safety functions with the two gas safety valves 12, 14 and the associated ball valves 50, 52 is also reduced when only a corresponding pressure accumulator 42 is connected to the terminal 26 of the valve block 10. Regardless of the rotational position of the plug of the ball valve 58, however, the 3-way ball valve solution always ensures that a gas safety valve 12 or 14 is in each case connected to the pressure accumulator 42 in gas supply. Dangerous operating errors are excluded as in the previously described solutions. In the circuit diagram shown in Fig.5 in the form of a hydraulic circuit diagram for a third embodiment of the safety system are a first monitoring device 60 in the first connection section 21 for electrical or electronic monitoring of a connection from the first gas safety valve 12 to the accumulator 42 and a second comparable monitoring device 62 in second connection portion 25 for monitoring the other connection from the second gas safety valve 14 to the pressure accumulator 42 to terminals 3, 2 of the 3-way ball valve 58 is formed. Otherwise, the representation of FIG. 5 substantially corresponds to the illustration according to FIG.

In the circuit diagram shown in Figure 6 for a fourth embodiment of the safety system only one gas safety valve 12 is provided and only one monitoring device 60, as presented above, in the first connection section 21 for monitoring the connection from the gas safety valve 12 to the pressure accumulator 42 on the associated ball valve 50 available , This monitoring device 60 can optionally monitor electrically or electronically the opening and / or closed position of the ball valve 50. The illustration of FIG. 6 differs from the first exemplary embodiment shown in FIGS. 3a and 3b, in particular in that the second gas safety valve 14, the second line section 49, the second valve connection 38, the second connection section 25 together with the second crossing point 27 and the second ball valve 52 omitted.

In the exemplary embodiments of the safety system shown in FIGS. 3 a, 3 b and 4, a redundant mechanical locking or valve control concept is implemented. In the mechanical locking concept according to FIGS. 3 a and 3 b, the two associated 2-way ball valves 50, 52 are mutually lockable in the direction of their respective horizontal closing position via the control disks 30 a, 30 b, so that only one ball valve 50 or 52 in FIG its locking Stel ment can get, which sets the gas-conducting safety function for only one of the two connected gas safety valves 1 2 or 14 out of force. In the valve control concept according to FIG. 4 an operator guidance is achieved in the sense that in each case, regardless of the operator's wish, a gas safety valve 1 2, 14 is always kept in its safety function, as seen from the valve stool of the valve 58 is.

In the exemplary embodiments shown in FIGS. 5 and 6, an electrical or electronic monitoring concept is implemented via at least one monitoring device 60, 62 on the 3-way ball valve 58 or on a ball valve 50. It is understood that combinations of such a monitoring concept according to FIGS. 5 and 6 with a mechanical locking or valve control concept according to FIGS. 3 a, 3 b and 4 on the valve block 10 can be combined with one another for reasons of redundancy.

As soon as a gas safety valve 1 2, 14 is to be removed from the valve block 10, it is first to be assured that the respective gas-conducting connection is from the gas safety valve 1 2, 14 via the valve connections 36, 38 and the respectively associated ball valve 50, 52 or 58 as well as the pressure port 26 to the accumulator 42 is disconnected or disconnected. is locked. This is achieved by operating the associated hand lever 16, 18 and an associated mechanical locking of the hand levers 1 6, 18 formed control discs 30 a, 30 b or a corresponding setting one of the two switching positions of the 3-way ball valve 58. In the valve solution with ball valve 58 and a externally actuated control would be conceivable, for example. In the form of an electric, hydraulic or pneumatic motor control. Alternatively or additionally, the blocking of the gas connection from the gas safety valve 12, 14 to the respective pressure accumulator 42 via at least one monitoring device 60, 62 are monitored, wherein the monitoring device 60, 62 generate a corresponding control and / or monitoring signal for a higher-level control device (not shown) can. Correspondingly, the active replacement of a gas safety valve 12, 14 can be monitored by hand on the valve block 10 and the valves 50, 52, 58 can be brought into the opening or closing switching position as required.

As soon as the fourth connecting section 33 is shut off from the pressure accumulator 42 to the gas safety valves 12, 14 via the third ball valve 54, the gas side 45 of the respective pressure accumulator 42 can be checked via a filling and testing device 28 (not shown) to be connected to the filling and test connection point 24 and optionally refillable. If refilling or switching in of working gas from the gas reservoir of the further pressure accumulators 40a, 40b is required, the third ball valve 54 is permanently opened, so that the working gas from the gas supply of the further pressure accumulators 40a, 40b via the third line sections 51, 51 a , 51 b can flow to the supply port 22, on the fourth connection portion 33 to the pressure port 26 and further on the fourth line section 53 to the pressure accumulator 42, if necessary. The associated pressure curve can be monitored via the pressure gauge 44 connected to the pressure gauge connection 34. Furthermore, the pressure in the safety system can be monitored electrically via the pressure transducer 28. Sol lte the gas supply in the respective other pressure accumulator 40a, 40b must also be aufgefül be, says the other pressure accumulator 40a, 40b are connected via the Anschlußstel le 22 on the valve block 10, this happens simultaneously with the open ball valve 54 together Gas side 45 of the respective pressure accumulator 42 and, if necessary. With closed ball valve 54 via the check valve 56. The pertinent len len on the Anschlußstel le 24 is then take place until through the SETTING pressure balance between the other pressure accumulators 40a, 40b, the refill at the connection point 24 and the respective pressure accumulator 42, the check valve 56 visibly reaches its closed set ting.

An alternative embodiment of the safety system according to the invention is shown in FIGS. 7a and 7b. The valve block 10 is compared to the embodiment shown in Figs. 1 a to 1 c designed comparatively small and umhaust a in the perspective depicting development of Fig. 7a and 7b not shown 3-way ball valve. The ball valve can be actuated via its on the valve block 1 0 rotatably arranged hand lever 1 6 between its switching positions. The valve block 10 with the components arranged thereon forms a separate structural unit, which is arranged on an end face 64 of a pressure accumulator 42. For this purpose, a right-angled bent connecting piece 66 is inserted into a passage opening on the end face 64, wherein the valve block 10 is fixedly connected to the connecting piece 66.

In the dargestel in Fig. 7a first variant of the safety system, a gas safety valve 1 2 and a rupture disc 68 are arranged on the valve block 1 0. H here are the gas safety valve 1 2 and the rupture disc 68 horizontally aligned and arranged on gegenüberl standing sides on Venti lblock 10. The rupture disk 68 has the function that, when the gas safety valve 1 2 is connected, it is kept free from damage by the rupture disk 68 at high pressure loads. About the arranged in the valve block 10 3-way ball valve, a gas-conducting connection between the gas safety valve 1 2 and the accumulator 42 is lockable or releasable. The 3-way ball valve has an L or T-bore, wherein the central connection leads to the pressure accumulator 42 and at the respective other terminals, the gas safety valve 1 2 and / or the rupture disk 68 are attached.

The second variant of the safety system illustrated in FIG. 7b differs from the first variant illustrated in FIG. 7a in that, instead of the rupture disk 68, a second gas safety valve 14 is arranged on the valve block 10. H here comes the advantage that when one of the two gas safety valves 12, 14 by the remaining on the valve block 1 0 other gas safety valve 1 4, 1 2 a continuous safety function is ensured.

Claims

P a n t a n s p r e c h e

Safety system with a valve block (1 0), to which at least one gas safety valve (1 2, 14) is detachably connected, with at least one controllable valve (50, 52, 58) in or on the valve block (10) and with at least one gaseous pressure medium receiving pressure accumulator (42) which is connected to the valve block (1 0) in gleichfal ls removable manner, characterized in that at least partially within the valve block (1 0) extending gas-conducting connection between the respectively connected pressure accumulator (42) and the respective connected gas safety valve (1 2, 14) by means of the valve (50, 52, 58) can be blocked or released.

Safety system according to claim 1, characterized in that the respective pressure accumulator (42) is a pressure vessel which is exclusively filled or fillable with the gaseous pressure medium, or is a hydraulic accumulator, the separation element (49) accommodated in a storage housing having a gas side (45) from a liquid side (47) separates.

Safety system according to claim 1 or 2, characterized in that at least two gas safety valves (12, 14) are connected to the valve block (1 0), and that is ensured by means of a safety device that for removing a gas safety valve (1 2, 14) from the valve block (1 0) the gas-conducting connection to the respectively connected pressure accumulator (42) is interrupted and the at least one other gas safety valve (12, 14) leading compound is maintained such that a permanent gas-carrying Connection between this respective pressure accumulator (42) and this respective other gas safety valve (12, 14) during the change process of a gas safety valve (12, 14) and its renewed commissioning is hergestel lt.

Safety system according to one of the preceding claims, characterized in that the safety device a

mechanical locking concept,

mechanical control concept,

electrical monitoring concept, or

chip-controlled actuation concept

for the respective controllable valve (50, 52, 58) is based.

Safety system according to one of the preceding claims, characterized in that for realizing a mechanical locking concept two, preferably manually operable, ball valves (50, 52) are provided which are each connected to a gas-assignable gas safety valve (12, 14) gas leading and the Control discs (30 a, 30 b), which in the mutually locked state sicherstel len that a ball valve (50) in its open Stel ment the associated gas safety valve (12) to the pressure accumulator (42) connects via a gas-conducting connection and the other ball valve (52 ) in its blocking Stel ment for removing the associated gas safety valve (14) from the valve block (10) an associated other connection to the respective pressure accumulator (40 a, 40 b, 42) blocks.

Safety system according to one of the preceding claims, characterized in that by means of two hand lever (1 6, 1 8) of the ball valves (50, 52), starting from a common opening direction, each one of the control discs (30 a, 30 b) in the direction of a Schl ießstellung of Ball valve (50, 52) is actuated, the outer peripheral side one Cutout (32a, 32b) which cooperates with a correspondingly formed cutout (32a, 32b) on the outer circumference of the other control disk (30a, 30b) such that a rotational movement of the respective ball valve (50, 52) by means of the associated hand lever (1 6, 18) is enabled or blocked.

Safety system according to one of the preceding claims, characterized in that the respective control disk (30a, 30b) cooperates with a limit stop (35a, 35b) on the valve block (10) in such a way that the hand lever (16, 18) runs parallel from an opening direction to the longitudinal orientation of the respective gas safety valve (12, 14) by 90 ° in a blocking position transverse to this longitudinal orientation and vice versa is pivotable.

Safety system according to one of the preceding claims, characterized in that a 3-way ball valve (58) is used for the actualization of a mechanical control concept as a controllable valve, in its one switching Stel development of a gas safety valve (1 2) via a connection with the Pressure accumulator (42) gas leading connects and another gas safety valve (14) by blocking an associated other connection from the pressure accumulator (42) decoupled, and that in another switching Stel development the other gas safety valve (14) via the other connection to the pressure accumulator (42) gas-conducting connected and a gas safety valve (12) is decoupled by blocking the one connection.

Safety system according to one of the preceding claims, characterized in that, for the realization of an electrical monitoring concept by means of a sensor system (60, 62), the position of the respectively controllable valve (50, 58) is monitored for its opening and / or closing position , and that an operation of the hydraulic only after the sensor system (60, 62) detects and communicates to the controller, that the respective gas-conducting connection between gas safety valve (12, 14) and pressure accumulator (42) via the controllable valve ( 50, 58) is released.

1 0. A security system according to any one of the preceding claims, characterized in that for the Real isierung a chip-controlled actuation concept, a control chip is provided, the operation of the control of the hydraulic power supply system whose operation makes it possible, in its removal, the supply system style sets and at the Inserted on the controllable valve (50, 52, 58) the respective assignable gas safety valve (1 2, 14) is on the gas side of the pressure accumulator (42) decoupled by blocking the associated compound.

1 1. Safety system according to one of the preceding claims, characterized in that the valve block (10) has at least one further supply connection (22) via which at least one further pressure accumulator (40a, 40b), preferably a gas pressure accumulator, can be connected, which can be connected via a within the valve block (10) arranged check valve (54) in its open Stel development with the respective pressure accumulator (42) gas-conducting connected, preferably connected to the gas side (45) of a hydraulic accumulator is. ^. Safety system according to one of the preceding claims, characterized in that the valve block (10) has at least one further connection point (24) to which a filling and testing device (28) can be connected which has a filling and test connection in the valve block (1 0) connected directly to the respective pressure accumulator (42) gas-conducting, and that this filling and test connection via a check valve (56) in the direction of the respective controllable valve (50, 52, 58) opens, is connected to a further connection between the respective further pressure accumulator (40a, 40b) and the respective pressure accumulator (42).