DE3925147A1 - Hot isostatic pressing equipment interlocking safety device - Google Patents

Abstract

An interlocking safety device includes a gas cylinder, a compressor, a high pressure vessel contg. a furnace, a process gas pipe system for supplying gas from the cylinder to the pressure vessel via the compressor, a relief pipe system connected between the compressor and pressure vessel venting to atmos. and a safety pipe system connected between the compressor and pressure vessel with a safety device which ruptures when the vessel pressure exceeds a predetermined level to relieve the pressure. The safety system comprises (a) a first valve in the process gas pipe system between the cylinder and the compressor and a first thermocouple to measure process gas temp. positioned close to the pressure vessel gas inlet, (b) a second valve in the relief pipe system with a second thermocouple positioned close by for temp.measurement, (c) a third valve in the safety pipe system with a third thermocouple positioned close by for temp. measurement, and (d) an interlocking device operating when the temp. signal from any of the thermocouples exceeds a preset value to close the first and third valves, open the second, stop compressor operation and disconnect furnace power

Description

The invention relates to a blocking device for an isostatic hot pressing device.

An isostatic hot press device (hereinafter for Simplification referred to as a HIP facility) nor serves sometimes to a processing step in an atmosphere sphere of inert gas, such as argon or stick material. Recently, however, is at a HIP facility sometimes as process gas argon mixed with acid fabric, used.  

Because in this case resistance to oxidation is required in a high temperature atmosphere a platinum-rhodium alloy furnace or the like as Oven used, which is arranged in a high pressure vessel is not. Such a process now includes rensgas normally consumes less than 20% oxygen Lich the inert gas, such as nitrogen.

On the other hand, a safety valve or Crushing disc as a safety device for a normal one Inert gas atmosphere used in a HIP facility.

With such a HIP device, in which gas, which is mixed with oxygen as the process gas is used are a control of the oxygen con concentration and control of the pressure are very important with regard to security aspects. This is a requirement Lich, because the HIP device may be damaged can be when oxygen with an excessively high Concentration in error in the process gas should be included, and if mistakenly a Pressure that is higher than a desired pressure, he could be enough, which leads to the high pressure vessel or a tube could be damaged.

Control of the oxygen concentration was however made not yet done. Instead, the inside temperature of the HIP device controlled to a poss prevent damage to the HIP device. This gives rise to the following problems.

In particular, an oven is included in a HIP device  covered with an insulating jacket so that the temperature in the high pressure vessel cannot rise as long as Thermocouple on the inner surface of an upper ver Conclusion of the high pressure vessel is arranged. If thus the insulating jacket is damaged and the tempera extremely high in the high pressure vessel Value increases, this will require the thermocouple to be determined to the energy supply of the furnace to turn off.

However, if the concentration of oxygen in the Process gas is high, there is a possibility that a gasket or packing by increasing the Internal temperature of the high pressure vessel oxidized (burned) becomes. As a result, the power supply may shut off the oven depending on detection of the thermo element to prevent oxidation, a you pack or a pack too late.

If continue with a process in an inert gas atmosphere a greater amount of oxygen than that permissible value contained in the process gas can a graphite furnace or a molybdenum furnace by the Sauer wear fabric.

In contrast, control of a pressure points the following problems in a HIP facility.

In particular, a HIP facility is a safe bet safety valve or a rupture disc provided to a Relieve pressure so that the pressure in the high pressure vessel does not exceed a predetermined desired pressure value  can walk.

However, if a higher pressure than the desired pressure value is reached when the concentration of acid is high in the process gas, if the Crushing disc breaks one to release the pressure large amount of gas discharged at the same time. Hence there is a risk that a tube ver burns. It is good to imagine the danger especially increases when the temperature of the Tube rises during gas delivery.

It is an object of the present invention to block device for an isostatic hot press device create what if an oxygen concentration that is higher than a predetermined value in the process gas is included, the supply of the process gas interrupts the high pressure vessel and the energy supply switches off to an oven to avoid possible damage prevent damage to the HIP facility.

It is another object of the present invention a blocking device for an isostatic hot press establishment to create what if a backup device, such as a crow disk, is broken, prevents a large amount of high temperature gas is drained at the same time and the energy supply to a furnace to prevent possible damage, a burning or overflowing flame on the Prevent HIP device, especially on a pipe.

To achieve these goals, according to one aspect, the  Present invention provided a blocking device tion for an isostatic hot pressing device fen, which is a high pressure vessel, an oven in the high pressure level, a process gas piping system for Zu Feeding process gas into the high pressure vessel this, and an opening and closing valve includes wel ches in the process gas piping system is switched. The blocking device comprises a ver Fahrensgas manifold, which in the middle of Ver Fahrensgas pipe system is arranged, as well as a Oxygen concentration sensor, which to determine an oxygen concentration in the process gas Process gas manifold is arranged, and a Blocking device which can be actuated when the Oxygen concentration sensor an oxygen concentration tration determined which is higher than a predetermined ter value to the opening and closing valve in the Process gas piping system to close and around a Power supply for the furnace in the high pressure vessel to prevent.

When process gas is released into the high pressure vessel the, it is from the gas cylinder by means of Ver gas line system into the high pressure vessel directs. Part of the process gas is thereby collected the process gas manifold, one Oxygen concentration in the thus collected ver driving gas through an oxygen concentration sensor is determined.

If the through the oxygen concentration sensor he average value is higher than a predetermined value  the opening and closing valve closed to the Process gas pipe close while the energy supply is interrupted in order to operate the Stop the furnace in the high pressure vessel.

The blocking device thus enables the prevention possible damage to components of the HIP device, such as a seal or a Pac when the oxygen concentration in the process rensgas is excessively high.

According to another aspect of the present invention is a blocking device for a hot isostatic Pressing device provided, which a first furnace in an oxygen atmosphere, and one second furnace for one of the oxygen atmosphere un different atmosphere, a high pressure vessel, which is suitable, alternatively the first or the second Include furnace to process gas into the pressure vessel supply with a process gas piping system, and with an opening and closing valve, which in the process gas piping system is arranged, wherein the blocking device a process gas collecting egg tion comprises, which in the middle area of the process gas piping system is arranged, as well as an acid substance concentration sensor, which in the process gas manifold is provided to a concentration to determine oxygen in the process gas, and a determination circuit for distinguishing between between the first and the second furnace, and a block Kiereinrichtung, which can be operated when the Sauer substance concentration sensor an oxygen concentration  determines which is higher than a predetermined value, and the determination circuit fixes the second furnace provides the opening and closing valve in the ver Fahrensgas pipe system to close and a Ver supply of the second furnace in the high pressure vessel interrupt.

If the second furnace, which can be a graphite furnace, to be used, it will be in an operating position introduced into the high pressure vessel. The graphite furnace is determined by the determination circuit.

After loading the graphite furnace, the process gas and fed into the high pressure vessel. If in this case the oxygen concentration in the ver driving gas is higher than a predetermined value, the blocking device closes the opening and Shut-off valve to close the process gas piping system close and disconnect the energy supply to one Prevent operation of the second or graphite furnace and stops the operation of the gas compressor.

Consequently, a Ver preventing possible damage to the HIP facility possible, even if incorrectly the first or the second furnace or process gas is optionally used.

According to another aspect of the present invention is a blocking device for an isostatic Hot pressing device is provided, which a Gaszylin which includes, as well as a gas compressor, a high pressure Ge  barrel, an oven in the high pressure vessel, a process gas piping system for supplying process gas from the gas cylinder to the high pressure vessel via the gas compressor, a drain line system, which with the Process gas piping system between the compressor and the high pressure vessel is connected to a pressure to dismantle to the environment, as well as a security tion system, which with the process gas line system between the gas compressor and the high pressure vessel is connected and a safety device which breaks when the pressure in the high pressure vessel rises to a higher value than one before given value to release the pressure, the Blocking device a first opening and closing valve includes which in the process gas line system between the gas cylinder and the gas compressor is provided, as well as a second opening and closing valve provided in the drain pipe system is, and a third opening and closing valve, wel is arranged in the safety line system, and a flow switch, which in the safe Unit piping system is provided to process gas determine which one from the security line system flows out when the pressure in the high pressure vessel descends below the predetermined value after the Security device was broken, as well as a Blocking device which can be actuated when the Flow switch determines that process gas is off the safety line system flows out to the first and to close the third opening and closing valve and around the second opening and closing valve  open to stop the operation of the gas compressor and power supply to the furnace in the high pressure to prevent vessel.

When process gas is introduced into the high pressure vessel should be, it is from the gas cylinder via the Ver gas pipeline system through the gas compressor in the high pressure vessel is pumped.

When the pressure in the high pressure system is higher Value increases as the predetermined value and the safe unit breaks, the flow switch determine a gas flow from the high pressure vessel via the safety line system and the Si security device is delivered. Hence closes the blocking device the first and the third opening valve to the process gas piping system and to close the safety line system while it is the second opening and closing valve opens to the Open drain pipe system. The blocking device continues to inhibit the operation of the gas compressor and disconnects the power supply for the oven.

Consequently, possible damage to a line or the like of the HIP device can be prevented, caused by leakage of a large amount of acid High temperature gas containing substance are caused can if the safety device is broken.

According to another aspect of the present invention is a blocking device for an isostatic  Hot pressing device is provided, which a Gaszylin which includes, as well as a gas compressor, a high pressure vessel, an oven in the high pressure vessel, a process gas piping system for supplying process gas from the cylinder to the high pressure vessel via the gas com pressor, a drain pipe system, which with the Ver Fahrensgas pipe system between the gas compressor and the high pressure vessel is connected to a pressure to the atmosphere, as well as a security Pipe system, which with the process gas pipe system between the gas compressor and the high pressure ge is connected and a breakable security device includes when the pressure in the high pressure vessel rises higher than a predetermined value to relieve the pressure with the blocking device on includes first opening and closing valve, which in the process gas piping system between the Gaszy Linder and the gas compressor is provided, as well as a second opening and closing valve, which in the Drain pipe system is provided, and a third Opening and closing valve, which in the safe unit line system is arranged, a first thermo element for measuring a temperature of the process gas piping system near a gas inlet opening, which out in a closure element of the high pressure vessel is formed, and a second thermocouple for measurement a temperature of the drain pipe system nearby the second opening and closing valve, as well as a third thermocouple for measuring a temperature of the Safety process gas line near the Safety device, and a blocking device,  which can be actuated when one of the temperature signals of the first, second and third thermo oils ment exceeds a predetermined value in order to first and third opening and closing valve close to the second opening and closing valve open to actuate the gas compressor stop and to power the furnace in the To prevent high pressure vessel.

In a similar manner, the blocking can thus be carried out possible damage to a line or a similar component of the HIP device prevented who the.

According to another aspect of the present invention is a blocking device for an isostatic Hot pressing device is provided, which a Gaszylin which includes, as well as a gas compressor, a high pressure vessel, an oven in the high pressure vessel, a process gas piping system for supplying process gas in the gas cylinder to the high pressure vessel via the gas compressor, a drain pipe system, which with the Process gas piping system between the gas compress sor and the high pressure vessel is connected to one Relieve pressure to atmospheric air, a sure bet unit piping system, which with the process gas Pipe system between the gas compressor and the high pressure vessel is connected and a safety device device, which is breakable, includes when the pressure in the high pressure vessel rises higher than a vorbe right value to release the pressure, the bloc  Kiervorrichtung a first opening and closing valve which is in the process gas piping system featured between the gas cylinder and the gas compressor can be seen, as well as a second opening and closing vein til, which is provided in the drain pipe system is a third opening and closing valve, which interposed in the safety line system is a flow switch, which is in the safe unit piping system is arranged to process gas determine which one from the security line system flows out when the pressure in the high pressure ge falls below a predetermined pressure, if the safety device is broken, on first thermocouple for measuring a temperature of the Process gas piping system near a gas inlet, which in a closure element of the high pressure vessel is formed, a second thermocouple ment for measuring a temperature of the drain line systems near the second opening and closing valve, a third thermocouple for measuring one Temperature of the safety line system nearby the safety device and a blocking device device, which can be actuated when the flow scarf ter determines that process gas from the safety Pipe system flows out and depending on one the temperature signals from the first, second and the third thermocouple, which has a predetermined Exceed value to the first and the third public Closing and closing valve to close the second Open and close valve to open the operation the gas compressor to stop and an energy ver  to prevent supply of the furnace in the high pressure vessel.

When the pressure in the high pressure vessel is higher Value increases as the predetermined value and the safe unit breaks, the flow determines switch a flow of gas coming from the high pressure vessel via the safety line system and the Security device is delivered. If one of the Temperatures, which of the first, the second and the third thermocouple, a height hold their value than the specified value, closes the blocking device the first and the third opening opening and closing valve, opens the second opening and shut-off valve, prevents the gas from operating compressor and disconnects the energy supply to the furnace.

Consequently, one can also use the blocking device possible damage to the HIP facility and a line or something like this HIP facility prevented who the one that leaks a large amount of High temperature gas containing oxygen can become if the safety device breaks. Furthermore, a safety device with a high degree of reliability.

According to another aspect of the present invention is a blocking device for an isostatic Hot pressing device is provided, which a Gaszylin which includes, as well as a gas compressor, a high pressure vessel, an oven in the high pressure vessel, a process gas piping system for supplying process gas from  the gas cylinder to the high pressure vessel via the gas compressor, a drain pipe system, which with the Process gas piping system between the gas compressor and the high pressure vessel is connected to a pressure vent to the ambient air, a safety Pipe system, which with the process gas pipe system between the gas compressor and the high pressure ge barrel is connected, and a safety device which is breakable when the pressure in the High pressure vessel rises to a higher value than one predetermined value to release the pressure, and a first opening and closing valve, which in the Process gas piping system is provided, the Blocking device a process gas manifold includes which with the process gas piping system between the gas cylinder and the gas compressor is, and an oxygen concentration sensor, which is provided in the process gas manifold is a concentration of oxygen in the ver to determine driving gas, a feed side block Kiereinrichtung, which can be operated when the Sauer substance concentration sensor an oxygen concentration determines which is higher than a predetermined value, around the first opening and closing valve in the ver gas line system and close one Power supply for the furnace in the high pressure vessel to separate. Furthermore, a second opening and Shut-off valve in the process gas line system between the gas cylinder and the gas compressor, and a third opening and closing valve, which  is interposed in a drain pipe system and a fourth opening and closing valve, which is arranged in the safety line system. A Flow switch is in the safety line system provided to determine process gas which from flows out of the safety line system when the Pressure in the high pressure vessel below a predetermined Value drops after the safety device breaks is broken, and a drain-side blocking device, which can be actuated when the flow switch Ver driving gas detects which of the safety Pipe system flows out to the second and fourth Open and close valve to close the third Open and close valve to open the operation of the gas compressor and to prevent energy supply of the furnace in the high pressure vessel to below break.

The blocking device thus controls the pressure in the HIP facility in addition to the concentration of the Oxygen. Consequently, through the blocking device guaranteed a very high level of security will.

According to another aspect of the present invention is a blocking device for an isostatic Hot pressing device is provided, which a Gaszylin which, a gas compressor, a high pressure vessel and one Includes furnace in the high pressure vessel, as well as a process Rensgas piping system for the supply of processes gas from the gas cylinder to the high pressure vessel via the  Gas compressor, a drain pipe system, which with the process gas pipeline system between the gas com pressor and the high pressure vessel is connected to one Relieve pressure to the atmosphere, sure unit piping system, which with the process gas Pipe system between the gas compressor and the high pressure vessel is connected and a safety device device which breaks when the pressure in the High pressure vessel rises to a higher value than one predetermined value to release the pressure, and on A first opening and closing valve is provided see which one in the process gas piping system is interposed. The blocking device comprises a process gas manifold, which with the Ver Fahrensgas pipe system between the gas cylinder and connected to the gas compressor, and an oxygen Concentration sensor, which in the process gas Manifold is provided to a concentration of Determine oxygen in the process gas. Next There is a blocking device on the feed side seen which can be actuated when the oxygen Concentration sensor an oxygen concentration averages which is higher than a predetermined value, around the first opening and closing valve in the ver gas line system close and an energy supply to the furnace in the high pressure vessel the. There is also a second opening and closing valve in the process gas piping system between Gas cylinder and the gas compressor provided, as well a third opening and closing valve, which in the Drain pipe system is arranged and a fourth  Opening and closing valve, which in the safe unit line system is provided. It is a first Thermocouple for measuring a temperature of the process rensgas piping system near a gas inlet, which in a closure element of the high pressure vessel is formed, provided, and a second thermo element for measuring a temperature of the drain lei system close to the third opening and closing valve, and a third thermocouple for measurement the temperature of the safety pipe system in the Near the safety device, and a drain-side Blocking device which can be actuated if one the temperature signals from the first, second and the third thermocouple a predetermined value exceeds the second and fourth opening and closing valve to close the third opening Opening and closing valve to open an operation the gas compressor to stop and an energy ver to prevent supply to the furnace in the high pressure vessel.

With this blocking device it is possible to similarly possible damage to a line or the like to prevent the HIP device.

According to another aspect of the present invention is a blocking device for an isostatic Hot pressing device is provided, which a Gaszylin who, a gas compressor, a high pressure vessel, a Furnace in the high pressure vessel and a process gas Pipe system for supplying process gas from the Gas cylinder to the high pressure vessel over the gas compressor  sor includes, and a drain line system, which with the process gas piping system between the gas compressor and the high pressure vessel is connected to release a pressure to the ambient air, a safe unit pipeline system, which with the process gas Pipe system between the gas compressor and the high pressure vessel is connected and a safety device device which is breakable when the pressure in the high pressure vessel rises to a higher value as a predetermined value to relieve the pressure. There is also a first opening and closing valve provided which in the process gas line system is arranged. The blocking device comprises a process gas manifold, which with the Ver Fahrensgas pipe system between the gas cylinder and the gas compressor is connected, an oxygen con concentration sensor, which in the process gas collection is arranged to a concentration of Determine oxygen in the process gas. A feed-side blocking device can be actuated, if the oxygen concentration sensor is acidic substance concentration, which is higher than a predetermined value to the first opening and Shut-off valve in the process gas piping system too close and a power supply for the furnace to prevent in the high pressure vessel. A second The opening and closing valve is in the process gas Pipe system between the gas cylinder and the gas Compressor provided a third opening and The shut-off valve is in the drain line system between switched, is a fourth opening and closing valve  interposed in the safety line system, a flow switch is in the safety line system provided to determine process gas which flows out of the safety line system, when the pressure in the high pressure vessel is below the agreed value drops after the security device tung is broken. A first thermocouple for measurement solution of a temperature of the process gas piping system is arranged near a gas inlet channel, which in a closure element of the high-pressure vessel is trained det. A second thermocouple to measure one Temperature in the drain line system is nearby the third opening and closing valve, a third thermocouple for measuring a temperature of the safety line system is close to the safety provided. An outlet-side bloc Kiereinrichtung is actuated when the flow switch determines that process gas from the safe unit pipe system and one of the tempera signals of the first, second and third thermo oils ment exceeds a predetermined value in order to second and the fourth opening and closing valve close to the third opening and closing valve open to stop the operation of the gas compressor and a power supply for the furnace in the To prevent high pressure vessel.

Even with this blocking device can be done in a similar way Way a possible damage to a wire or one similar component of the HIP device prevented who the.  

According to another aspect of the present invention is a blocking device for an isostatic Hot pressing device provided, which a first Includes furnace for an oxygen atmosphere, as well as a second oven for an atmosphere that differs from that Distinguishes oxygen atmosphere, a high pressure ge barrel, which is suitable, alternately the first or to take up the second furnace, a gas cylinder, a gas compressor, a process gas piping system for supplying process gas from the gas cylinder to the high pressure vessel via the gas compressor, an Ab let line system, which with the process gas Lei system between the gas compressor and the high pressure vessel is connected to a pressure to the Atmos a safety line system, which with the process gas piping system between connected to the gas compressor and the high pressure vessel and has a safety device which is breakable if the pressure in the high pressure vessel rises above a predetermined pressure value by the Relieve pressure. Furthermore, a first opening and shutoff valve in the process gas piping system arranged. The blocking device comprises a ver gas line, which is connected to the process gas Pipe system between the gas cylinder and the gas compressor is connected, an oxygen concentration tion sensor, which in the process gas collection device for determining a concentration of oxygen is located in the process gas, a determination circuit to distinguish between the first and the second oven. A feed side block  direction can be actuated when the oxygen concentration tration sensor determines an oxygen concentration, which is higher than a predetermined value and the Determination circuit determines the second furnace the first opening and closing valve in the process gas piping system close and around an energy supply for the second furnace in the high pressure vessel to prevent. A second opening and closing valve is in the process gas piping system between the Gas cylinder and the gas compressor provided a third The opening and closing valve is in the drain line arranged system, a fourth opening and The closing valve is in the safety line system interposed, a flow switch is in the Safety guidance system provided to procedural gas to determine which one from the safety line system flows out when the pressure in the high pressure vessel drops below a predetermined pressure after the Safety device is broken. An indulgence side blocking device can be actuated when the Flow switch detects that process gas is off the safety line system flows out to the second and fourth open and close valve to close to open the third opening and closing valve to stop actuating the gas compressor and around power supply to the furnace in the high pressure vessel adjust.

Similarly, this blocking device can possible damage to a line or the like prevent the HIP facility.  

According to another aspect of the present invention is a blocking device for an isostatic Hot pressing device provided which a first Oven for an oxygen atmosphere, a second oven for an atmosphere that differs from the oxygen atmosphere differs, includes, as well as a high pressure vessel, which is suitable, alternatively one of the first and second furnaces, a gas cylinder, a gas compressor, a process gas piping system for supplying process gas from the gas cylinder to the high pressure vessel via the gas compressor Drain line system, which with the process gas Pipe system between the gas compressor and the high pressure vessel is connected to a pressure to the atmosphere let down. A safety line system is in the process gas pipeline system between the gas com pressor and the high pressure vessel connected and includes a safety device that is breakable, when the pressure in the high pressure vessel rises higher as a predetermined value to release the pressure. There is also a first opening and closing valve interposed in the process gas piping system. The blocking device comprises a process gas Manifold, which with the process gas line between the gas cylinder and the gas compressor is, and an oxygen concentration sensor, which in the process gas manifold for investigation concentration of oxygen in the ver driving gas is arranged. Furthermore, there is a determination mation circuit provided to switch between the first and to distinguish the second oven. A feeder  side blocking device can be actuated when the Oxygen concentration sensor an oxygen concentration tration determined which is higher than the predetermined te value and the determination circuit the second furnace notes the first opening and closing valve close in the process gas piping system and to supply energy to the second furnace in the To prevent high pressure vessel. A second opening and shut-off valve is in the process gas line system between the gas cylinder and the gas compressor provided a third opening and closing valve is interposed in the drain pipe system, a fourth opening and closing valve is in the Safety line system arranged, a first Thermocouple for measuring a temperature of the ver Fahrensgas piping system is near a gas inlet arranged, which in a closure element of the high pressure vessel is formed, a second thermocouple ment for measuring a temperature of the drain line systems is close to the third opening and closing valve arranged, a third thermocouple for measurement solution of a temperature of the safety line system is provided near the safety device, further a blocking device on the outlet side is actuated bar if any of the temperature signals from the first one one before the second and the third thermocouple given value exceeds the second and that fourth open and close valve to close to open the third opening and closing valve stop the operation of the gas compressor and by one Power supply for the furnace in the high pressure vessel  to prevent.

Similarly, through this blocking device possible damage to a line or the like the HIP device can be prevented.

According to another aspect of the present invention is a blocking device for an isostatic Hot pressing device provided, which a first Oven for an oxygen atmosphere, a second one Oven for an atmosphere that differs from the Sauer atmosphere distinguishes, includes, and a High pressure vessel, which is suitable, alternatively the first or second furnace to receive a gas cylinder, a gas compressor, a process gas lei system for supplying process gas from the Gas cylinder to the high pressure vessel via the gas commander pressor. A drain line system is in the process gas line system between the gas compressor and connected to the high pressure vessel to a pressure to At dismantle the atmosphere. There is a safety line system with the process gas piping system between the gas Compressor and the high pressure vessel connected and points a safety device which is breakable is when the pressure in the high pressure vessel is above a predetermined value increases to release the pressure. There is also a first opening and closing valve interposed in the process gas piping system. The blocking device comprises a process gas Manifold, which with the process gas line system between the gas cylinder and the gas compressor  is connected, as well as an oxygen concentration sensor, which is in the process gas manifold is arranged to have an oxygen concentration in the process gas. In addition is a Determination circuit provided to make a difference between the first and the second furnace fen. A feed-side blocking device is actuated when the oxygen concentration sensor determined an oxygen concentration, which higher is as a predetermined value and the determination circuit detects the second oven to the first Opening and closing valve in the process gas line system to close an energy supply for the furnace in the high pressure vessel. A second opening and closing valve is in the Process gas piping system between the gas cylinder and the gas compressor, a third opening and closing valve is in the drain pipe system between switched, a fourth opening and closing valve is arranged in the safety line system net, a flow switch is in the safety Line system installed to determine flow gas len, which from the safety line system flows when the pressure in the high pressure vessel is below a predetermined pressure drops after the safe unit has burst. A first thermo oil ment is provided to a temperature in the process to measure the rensgas piping system near a gas inlet, which in a closure element of the high pressure vessel is trained. A second thermocouple is featured see a temperature in the drain pipe system  near the third opening and closing valve to measure, a third thermocouple is used to measure the Temperature of the safety line system in the Measure near the safety device. One off blocking device on the lower side can be actuated if the flow switch determines that process gas flows out of the safety line system and if one of the temperature signals from the first, the two ten and the third thermocouple a predetermined Value exceeds the second and third Open and close valve to close the third opening valve to open an operation of the Adjust gas compressor and an energy supplier switch off for the furnace in the high pressure vessel.

Even with this blocking device can be done in a similar way Way a possible damage to a wire or one similar component of a HIP device be changed.

In the following the invention based on execution examples described in connection with the drawing, with other features, objectives and benefits of present invention are illustrated. Here shows:

Fig. 1 is a schematic representation of a first embodiment of the blocking device according to the invention for a HIP Einrich tung,

Fig. 2 is a schematic view of an oxygen concentration sensor for uses voltage in the embodiment shown in Fig. 1 Anord, which comprises zirconium,

Fig. 3 is a schematic representation of a locking device for a HIP Einrich processing according to a second Ausführungsbei game of the present invention, in wel chem the HIP process is carried out under an inert gas atmosphere,

Fig. 4 is a schematic sectional view of the embodiment shown in Fig. 3 HIP device, wherein a HIP process in a gas atmosphere Sauerstoffat expires,

Fig. 5 is a sectional view of a bottom closure member of the HIP shown in Fig. 3 means

Fig. 6 shows a circuit arrangement of a burn 'detection range of a thermoelectric converter according to the rule in Fig. Gezeig th assembly 3

Fig. 7 shows a schematic arrangement of a third embodiment of the blocking device according to the invention for processing a HIP Einrich

Fig. 8 is a schematic view of a locking device according to a fourth exporting approximately example of the present invention,

Fig. 9 shows a fifth embodiment of a blocking device according to the invention for a HIP device,

Fig. 10 is a schematic representation of a sixth embodiment of a OF INVENTION to the invention locking device for a HIP device,

Fig. 11 is a schematic representation of a seventh embodiment of an inventive locking device for a SEN HIP-A direction,

Fig. 12 shows an eighth embodiment of a blocking device according to the invention in a schematic representation;

Fig. 13 is a schematic representation of a ninth embodiment of an inventive blocking device for a HIP device, and

Fig. 14 is a schematic representation of a tenth embodiment of an inventive blocking device.

In Fig. 1, a HIP device is shown, which is provided with a first embodiment of an inventive blocking device. The HIP device comprises a high-pressure vessel 1 with an upper closure element 2 and a lower closure element 3 . By means of a press frame, not shown, a pressing axial force of the high-pressure vessel 1 is absorbed during use. In the high-pressure vessel 1 , a furnace 4 is arranged, which comprises a heater 6 and an insulating jacket 7 , etc., and which is arranged on a storage table 5 . A workpiece 8 to be processed is set up on the storage table 5 . The heater 6 is connected to a power supply 13 via a converter 9 , a thyristor circuit 10 , an opening and closing switch 11 , an interrupter 12 , etc.

A process gas piping system 14 is provided for introducing and discharging a process gas from a gas cylinder 15 into the high pressure vessel 1 via an opening and closing valve 16 , a pair of check valves 17 and 18 , a further opening and closing valve 19 , etc. A gas compressor 20 for compressing the process gas is connected to the line system 14 between the check valves 17 and 18 . A process gas manifold 21 is connected to the lower pressure side of the pipe system 14 via a throttle valve 22 so that the collected process gas can be released from the process gas manifold 21 into the atmosphere.

An oxygen concentration sensor 23 is provided on the inside of line 21 to electrically determine a concentration of oxygen in the process gas. The oxygen concentration sensor 23 can be configured in the zirconium type, the magnet type, the electrode type, etc. If, for example, a zirconium sensor is used, a zirconium cell 24 is provided on the inside of the line 21 , as shown in FIG. 2. As shown in FIG. 2, when the zirconium cell 24 is heated red-hot via a cell heater 25 and is exposed to the process gas, movement of oxygen ions in the zirconium cell 24 is effected because of the partial pressures of the oxygen at the opposite interfaces of the Zirconium cell 24 . Consequently, an electromotive force is generated between a pair of electrodes 26 in accordance with a concentration of oxygen in the process gas. Consequently, this oxygen concentration can be measured depending on the size of the electromotive force. As shown in Fig. 1 represents, an amplifier 27 for amplifying a detection signal of the oxygen concentration sensor 23 is provided, and an adjusting device 28 for setting a limit value of the oxygen concentration in the process gas. An arithmetic function 29 is provided in order to compare a determined value from the oxygen concentration sensor 23 and a predetermined value from the adjusting device 28 . If the determined value is higher than the set value, that is, if the oxygen concentration is higher than a predetermined value, the computing unit 29 outputs a blocking signal A. Depending on such a blocking signal A , an air line solenoid valve 30 a is energized to close the opening and closing valve 19 a , while the opening and closing switch 11 is switched off and the gas compressor 20 is stopped. It should be emphasized that the blocking device 31 is formed by the setting device 28 and the computing unit 29 .

If process gas is to be tet eingelei in the high-pressure vessel 1, it is derived from the gas cylinder 15 is in the high pressure vessel 1 via the line system fourteenth In this case, part of the process gas is collected by means of line 21 and a concentration of oxygen in the process gas thus collected is determined by sensor 23 . After this collection, the process gas is released into the atmosphere.

If a value determined by the sensor 23 is determined which is higher than a value specified by the adjusting device 28 , the computing unit 29 , which compares the two values, outputs a blocking signal A. Thus, depending on such a blocking signal A, the opening and closing valve 19 a is closed , while the opening and closing switch 11 is switched off and the gas compressor 20 is stopped. As a result, the introduction of process gas into the high-pressure vessel is stopped, and furthermore an energy supply to the heater 6 is prevented. As a result, possible damage to the HIP device which would be caused by an excessively high oxygen concentration can be prevented.

In Fig. 3, a second preferred exemplary embodiment of the blocking device according to the invention for a HIP device is shown. In this case, the HIP device is designed so that an oven for an oxygen atmosphere and another oven for an atmosphere different from the oxygen atmosphere can be used and used alternatively or alternately in a single high-pressure vessel. The blocking device also serves to determine the type of furnace to be used and also enables such a determination of blocking requirements.

Specifically, a graphite furnace 32 for performing a high temperature process in an inert gas atmosphere is shown, which is arranged in a high pressure vessel 1 in Fig. 3, while a platinum-rhodium alloy furnace 33 for performing a process in an oxygen atmosphere in Fig. 4 in the high pressure vessel is shown in Fig. 1.

Each of the furnaces 32 and 33 comprises a heater 34 or 35 , an insulating jacket 36 or 37 , a thermocouple 38 or 39 etc. and is in each case placed on a storage table 40 or 41 . A W-Re thermocouple can be used as a thermocouple 38 in the graphite furnace 32 , while a platinum-rhodium thermocouple can be used as a thermocouple 39 in the platinum-rhodium furnace 33 so that it is suitably designed for the respective process conditions are.

At different locations on the storage table 40 or 41, a pair of thermocouple connectors 42 or 43 are provided, for each of the ovens 32 and 33 , and are connected to the opposite ends of each thermocouple 38 or 39 , respectively. A pair of thermocouple terminals 44 or 45 are in a Bodenver closure element 3 each in a corresponding relationship to the thermocouple 42 or 43 is provided.

In the high-pressure vessel 1 , a positioning device 46 is provided which, as shown in Fig. 5, comprises a bearing 47 which is provided above in the center of the lower closure element 3 and has a locking, and a recess 48 or 49 , each in each the storage tables 40 and 41 are formed and are provided with a bolt guide. Thus, if the furnaces 32 or 33 are placed in position on the lower closure element 3 , they can be positioned so that the corresponding connections, ie the connections 42 and 44 or the connections 43 and 45 , are each connected to one another, as shown in FIG is shown in FIGS. 3 or 4.

Each of the thermocouple connections 44 and 45 is connected to a temperature controller 54 via a pair of compensation lines 50 or 51 , each having a thermo-electrical converter 52 or 53 . The temperature controller 54 compares a measured temperature from the thermocouples 38 or 39 with a set temperature from a function generator 55 to control a thyristor circuit 10 via a thyristor control circuit 56 to regulate the furnace 32 or 33 so that the process chamber temperature is the same the set temperature. The temperature control 54 is designed so that it can determine a burning signal, which is a difference between the furnaces 32 or 33 . Specifically, if the thermocouple 38 or 39 is connected as shown in Fig. 6, only a very small current will flow through a resistor R _S and a capacitor C _F will be charged slightly because the resistance of a further resistor R _{B is} very high is compared to the resistance R _S. On the contrary, if none of the thermocouples 38 and 39 are connected, the resistance R _{S represents} an infinitely high resistance. Consequently, the capacitor C _{F is} charged and a burn-through signal is developed.

A discrimination circuit 57 is provided for distinguishing the furnaces 32 or 33 . If the thermocouple terminals 45 are non-conductive while the other thermocouple terminals 44 are conductive, the discriminating circuit 57 detects the furnace 32 in response to a blow signal from the temperature controller 54 and develops a distinguishing signal thereof. An AND circuit 58 outputs a blocking signal A when it receives a signal from an arithmetic unit 29 and a discrimination signal from the discrimination circuit 57 , ie when the concentration of oxygen in the process gas is higher than a predetermined value and the furnace 32 into it High temperature vessel 1 is set.

If the graphite crucible 32 is to be selectively used, the upper closure element 2 is the high pressure vessel 1 is removed and the furnace 32 is inserted from above into the high-pressure vessel 1 and placed in position on the lower closure element 3 by means of the positioning mechanism 46th Consequently, the connections to the storage table 40 are connected to the connections 44 of the lower closure element 3 , while the connections 45 remain in a non-conductive state. Accordingly, the discriminating circuit 57 operates in response to a burn-out signal from the temperature controller 54 to thereby determine the storage of the furnace 32 and to output a distinguishing signal thereof.

After the furnace 32 has been inserted, process gas is added and fed into the high-temperature vessel 1 from the gas cylinder 15 . Then, when the concentration of oxygen in the process gas exceeds a permissible predetermined value, the AND circuit 58 is opened in response to a signal from the computing unit 29 and the identification signal from the discrimination circuit 57 and outputs a blocking signal A. Consequently, the opening and closing valve 19 a is closed, while the opening and closing switch 11 is turned off and the gas compressor 20 is stopped. Consequently, if the graphite furnace 32 is mistakenly used for a HIP process in an oxygen atmosphere or if an oxygen mixture with gas as process gas is similarly introduced into the high-pressure vessel 1 in a HIP process with an inert gas atmosphere, possible wear of the graphite can occur oven 32 can be prevented by oxidation.

Reference 7 is hereinafter referred to Fig., Which illustrates a third preferred embodiment of the OF INVENTION to the invention locking device for a HIP Einrich processing. A high pressure vessel 1 for a HIP device has an upper closure element 2 and a lower closure element 3 , a pressure frame for receiving pressure axial forces during driving on the high pressure vessel 1 is not shown. An oven 4 comprises a heater 6 , an insulating jacket 7 , etc. and is arranged on a storage table 5 . A workpiece 8 , which is to be machined, is placed on the storage table 5 . The heater is connected to a power supply 13 via a converter 9 , a transistor circuit 10 , an opening and closing switch 11 , an interrupter 12 , etc.

A process gas line system 14 is provided to process gas from a gas cylinder 15 in the high pressure vessel 1 via a pair of opening and closing valves 16 and 19 d , a pair of check valves 17 and 18 and other opening and closing valves 19 a etc. to feed and to derive. A gas compressor 20 for compressing the process gas is interposed in the line system 14 .

A drain pipe system 61 a pressure release b gas into the atmosphere and a safety line system 61 for the delivery of process gas into the atmos phere are provided, when the pressure in the high pressure vessel 1 to a value higher increases than a predetermined pressure and are connected to the process gas system 14 between the gas compressor 20 and the high pressure vessel 1 . A throttle valve 62 is connected to the process gas line system 14 via the drain line system 61 a , an opening and closing valve 19 d is connected to a portion of the procedural gas line system 14 before the throttle valve 62 , so that the pressure by opening or Closing the opening and closing valve 19 b is obtained on right.

A flow switch 63 is disposed b in the conduit system 61, a rupture disk 64 is in the line system 61 b provided in front of the flow switch 63 while an opening and closing valve 19 c is arranged on the lower side of the flow switch 63rd The rupture disk 64 serves as a safety device, which breaks to reduce the pressure in the conduit system 61 b to drain when the pressure over a vorbestimm th value increases. The flow switch 63 determines a process gas flow in the line system 61 b when the pressure drops to a lower value than a desired pressure after the crushing disk 64 has broken. When the flow switch 63 detects a flow of process gas and outputs a determined transmission signal, such a signal is amplified by an amplifier 65 and converted to a blocking signal A. A solenoid valve 30 b is acted upon as a function of the blocking signal A with energy to open the opening and closing valve 19 b , while further solenoid valves 30 c and 30 d are acted upon with energy to the opening and closing valves 19 c and close 19 d . At the same time, the energy supply 13 for the furnace 4 is interrupted by the opening and closing switch 11 and the gas compressor 20 is stopped. It should be emphasized that the blocking device 66 is formed by the flow switch 63 and the amplifier 65 .

If now the pressure in the high-pressure vessel 1 rises above a predetermined pressure value, so that the breaking disk 64 breaks, process gas will flow through the line system 61 b and the flow switch 63 will determine such a flow of process gas and emit a detection signal. The detection signal is amplified by the amplifier 65 and leads to a blocking signal A. In dependence on such a blocking signal A , the solenoid valve 30 b is energized to open the opening and closing valve 19 b , the solenoid valves 30 c and 30 b are energized to the opening and closing valves 19 c and 19 d each to close, during the opening and closing switch ter 11 turned off and the gas compressor 20 be stopped ge. Consequently, the outflow of a large amount of high-temperature gas from the line system 61 b is prevented and an excessively high pressure is gradually released via the throttle valve 62 from the line system 61 a . In the meantime, the gas supply into the high-pressure vessel 1 is stopped and the heater 46 is switched off. As a result, possible damage to the lines of the HIP device, which could be caused by leakage of a large amount of oxygen-containing high temperature gas, can be prevented.

In Fig. 8, a fourth preferred exemplary embodiment of a blocking device for an isostatic hot pressing device is shown. The Blockiervorrich device is a modification of the embodiment shown in FIG. 7 and differs in that a thermocouple 67 a for measuring a temperature in a line 14 is arranged near a gas inlet, which is formed in an upper closure element 2 from. Furthermore, a further thermocouple element 67 b for measuring a temperature in a line system 61 a near an opening and closing valve 19 b is provided, while another thermocouple 67 c for measuring a temperature on a line system 61 b near a crow disk 64 is provided. The thermocouples 67 a , 67 b and 67 c are connected to electrical converters 68 a , 68 b and 68 c, respectively. An adjusting device 69 is provided in order to set an allowable value of the temperature for each line system. A computing unit 70 compares the line temperatures of the thermocouples 67 a , 67 b and 67 c with a predetermined temperature from the setting device 69 and develops a distinctive signal when one of the line temperatures is higher than the preset temperature. An OR circuit 71 signals an AND circuit 72 when a discrimination signal is obtained from an arithmetic unit 70 . The AND circuit 72 develops a blocking signal A when it receives both a detection signal from the computing unit 70 and a detection signal from a flow switch 63 , that is, when the breaker disk 64 is broken to allow process gas to flow therefrom and thereupon the temperature of any pipe system is raised above the preset temperature. It should be emphasized that in this arrangement, a blocking device 63 by the flow switch 63 , the amplifier 65 , the adjusting device 69 , the computing unit 70 , the OR circuit 71 and the AND circuit 72 is formed.

If a blocking signal A is emitted, a solenoid valve 30 b is energized to open the opening and closing valve 19 b , but the solenoid valves 30 c and 30 d are energized to the opening and closing valves 19 c and 19 d each to close while an opening and closing switch 11 is turned off and a gas compressor 20 is stopped. As a result, an outflow of a large amount of temperature gas from the pipe system 61 b is prevented, and an excessively high pressure is gradually released from the pipe system 61 a by means of a throttle valve 62 . Since the temperature in each of the piping systems does not rise higher than the preset temperature and since the supply of gas to the high pressure vessel 1 is stopped while the heater 6 is turned off, possible damage to the piping system of the HIP device, which is caused by leakage of a large amount of oxygen-containing high temperature process gas would be caused. As a result, a safety device with a very high degree of reliability can be obtained.

It should be emphasized that the blocking device 74 can be formed by the setting device 69 , the arithmetic unit 70 and the OR circuit 72 , so that a blocking signal A can be obtained as an outlet signal of the OR circuit 71 according to FIG. 8.

Furthermore, the safety device can be designed in the form of any other safety device than the breaker disk 64 described above.

Fig. 9 shows a fifth embodiment of the blocking device according to the invention for a HIP device. This blocking device is designed as a suitable combination of the Blockingvorrich lines shown in Fig. 1 and 7, so that a detailed description descrip to avoid repetition. However, it should be pointed out that the blocking device 31 according to FIG. 1 serves as a supply-side blocking device which can be actuated when the oxygen concentration sensor 23 detects an oxygen concentration which is higher than a predetermined value by the opening and closing valve 19 a in the process gas line system 14 to close and to interrupt the power supply 13 for the furnace 4 in the high-pressure vessel 1 , while the blocking device 63 according to FIG. 7 serves to be actuated as an ablass-side blocking device when the flow switch 63 determines That process gas flows out of the safety line system 61 to close the opening and closing valves 19 d and 19 c and to open the opening and closing valve 19 b to stop the operation of the compressor 20 and the energy supply 13 to interrupt for the furnace 4 in the high pressure vessel 1 .

Fig. 10 shows a sixth preferred embodiment example of a blocking device according to the invention for a HIP device. This blocking device is formed by a suitable combination of the blocking devices, which are shown in FIGS . 1 and 8. In this blocking device, the blocking device 31 according to FIG. 1 serves as a supply-side blocking device, while the blocking device 74 according to FIG. 8 serves as a blocking device on the outlet side.

In Fig. 11, a seventh embodiment of the blocking device according to the invention for a HIP device is shown. The blocking device is designed as a suitable combination of the blocking devices shown in FIGS. 1 and 8. In this exemplary embodiment, however, the blocking device 31 according to FIG. 1 serves as a supply-side blocking device, while the blocking device 73 according to FIG. 8 serves as a blocking device on the outlet side.

Fig. 12 shows an eighth embodiment of a blocking device according to the invention for a HIP device. This blocking device is in the form of a suitable combination of the blocking devices shown in FIGS . 3 and 7, wherein in this blocking device the blocking device 31 according to FIG. 3 serves as a supply-side blocking device, while the blocking device 63 of FIG. 7 serves as a blocking device on the outlet side.

Fig. 13 shows a ninth embodiment of a blocking device according to the invention for a HIP device. In this exemplary embodiment of the blocking device, a suitable combination of the blocking device shown in FIGS . 3 and 8 has been made, the blocking device 31 according to FIG. 3 serving as the supply-side blocking device, while the blocking device 74 according to FIG. 8 serves as the discharge-side blocking device.

Fig. 14 shows a tenth embodiment of a locking device according to the invention for a HIP device. The blocking device shown here represents a suitable combination of the blocking devices shown in FIGS . 3 and 8, wherein in this tenth exemplary embodiment the block 00547 00070 552 001000280000000200012000285910043600040 0002003925147 00004 00428 blocking device 31 according to FIG. 3 serves as a blocking device on the feed side, while the blocking device 73 8 processing is shown in FIG. Blockiereinrich as a let-off side.

The invention is not based on the embodiment shown examples limited, rather arise for the Expert within the scope of the invention varied options for modification and modification.

Claims (13)

1. Blocking device for an isostatic hot pressing device with a high pressure vessel, an oven in the high pressure vessel, a process gas line system for supplying process gas to the high pressure vessel and an opening and closing valve which is arranged in the process gas line system, characterized in that a process gas manifold is located in the central area of the process gas piping system, an oxygen concentration sensor is provided in the process gas manifold to detect a concentration of oxygen in the process gas, and a blocking device is operable when the oxygen concentration sensor determines an oxygen concentration, which che is higher than a predetermined value in order to close the opening and closing valve in the process gas line system and to switch off a power supply for the furnace in the high pressure vessel. 2. Blocking device according to claim 1, characterized in that the Process gas manifold with the process gas Line system between a gas cylinder and a Gas compressor is connected. 3. Blocking device for an isostatic hot pressing device, which a first furnace for a Oxygen atmosphere, a second furnace for one Atmosphere different from an oxygen atmosphere, a high pressure vessel, which alternatively can accommodate the first or the second oven, a process gas piping system for the supply of Process gas in the high pressure vessel and an opening Opening and closing valve, which in the process gas piping system is arranged comprises characterized by a process gas manifold, which is in the central area of the Process gas line system is arranged, a  Oxygen concentration sensor, which in the Process gas manifold is provided for Er averaging a concentration of oxygen in the Process gas, a discrimination circuit for Distinguish between the first and the second Oven and a blocking device which operates bar when the oxygen concentration sensor determined an oxygen concentration, which higher is as a predetermined value and the difference circuit determines the second oven to the Opening and closing valve in the process gas Line system to close and an energy supplier supply for the second furnace in the high pressure vessel switch on. 4. blocking device according to claim 1, characterized in that the Process gas manifold with the process gas Line system between a gas cylinder and a Gas compressor is connected. 5. Blocking device for an isostatic hot Press device with a gas cylinder, a gas compressor, a high pressure vessel, an oven in the high pressure vessel, a process gas line system for supplying process gas from the gas cylinder to the high pressure vessel by means of the gas com pressors, a drain piping system that works with the process gas piping system to the gas compressor sor and the high pressure vessel for releasing a pressure to the ambient air, a safety  Pipe system, which with the process gas Pipe system between the gas compressor and the High pressure vessel is connected and a safety device which is breakable if the pressure in the high pressure vessel over one agreed value increases to relieve the pressure characterized by a first Opening and closing valve, which in the process gas line system between the gas cylinder and the gas compressor is provided, a second opening opening and closing valve, which is in the drain Line system is interposed, a third Opening and closing valve, which in the safe unit line system is provided, a stream switch, which is in the safety line system for determining a process gas flow is provided from the safety line system, when the pressure in the high pressure vessel is below one predetermined pressure drops after the security device is broken and blocked device which can be actuated when the flow mungsschalter determined that process gas from the Safety pipe system flows out to close of the first and third opening and closing valve, for opening the second opening and closing valve, to stop the operation of the gas compressor and to interrupt a power supply for the Oven in the high pressure vessel. 6. Blocking device for an isostatic hot Press device with a gas cylinder, a gas  compressor, a high pressure vessel, an oven in the high pressure vessel, a process gas line system for supplying process gas from the gas cylinder to the high pressure vessel by means of the gas com pressors, a drain piping system that works with the process gas piping system between the gas compressor and the high pressure vessel for dispensing the Pressure to the ambient air is connected Safety line system, which with the Ver Fahrensgas pipe system between the gas compressor sor and the high pressure vessel is connected, and a Security device which is breakable is when the pressure in the high pressure vessel is above a predetermined value increases by the pressure dismantle characterized by a first Opening and closing valve, which in the ver Fahrensgas pipe system between the gas cylinder and the gas compressor is arranged, a second Opening and closing valve, which is in the drain Line system is provided, a third opening Opening and closing valve, which in the safe unit line system is interposed first thermocouple for measuring a temperature of the process gas piping system near one Gas inlet, which in a closure element the high pressure vessel is formed, a second Thermocouple for measuring a temperature in the Drain pipe system near the second public opening and closing valve, a third thermocouple ment for measuring a temperature of the safety  Line system adjacent to the security direction, and a blocking device, which be is operable when one of the temperature signals from the first, the second and the third thermo oils ment exceeds a preset value to Closing the first and third opening and Closing valve, to open the second opening and closing valve to stop the operation of the Gas compressor and to interrupt an energy supply for the furnace in the high temperature vessel. 7. Blocking device for an isostatic hot Press device with a gas cylinder, a gas compressor, a high pressure vessel, an oven in which High pressure vessel, a process gas piping system for supplying process gas from the gas cylinder to the high pressure vessel via the gas compressor, one Drain pipe system, which with the procedure gas piping system between the gas compressor and to the high pressure vessel for releasing pressure the atmospheric air is provided, a safe unit management system, which with the process gas piping system between the gas compressor and the high pressure vessel is connected and a safe device which is breakable, if the pressure in the high pressure vessel is above one certain value increases to release this pressure sen, characterized by a first Opening and closing valve, which in the process gas line system between the gas cylinder and  the gas compressor is arranged, a second Opening and closing valve, which is in the drain Line system is provided, a third opening Opening and closing valve, which in the safe unit line system is interposed, one Flow switch, which is in the safety lei system for determining a gas flow the safety line system is arranged if the pressure in the high pressure vessel below one agreed value drops after security broken direction, a first thermocouple for measuring a temperature of the process gas Pipe system near a gas inlet, which in a closure element of the high pressure Ge is formed, a second thermocouple for measuring a temperature of the drain pipe system stems near the second opening and closing valves, a third thermocouple for measurement a temperature of the safety line system near the security device, and a blockage device which can be actuated when the flow switch the outflow of process gas from the safety line system, so like exceeding one of the temperature signals of the first, the second and the third thermo element over a predetermined value for closing the first and third opening and Closing valve, to open the second opening and closing valves, to stop the operation of the gas compressor and to interrupt an ener Energy supply for the furnace in the high pressure vessel.   8. Blocking device for an isostatic hot Press device with a gas cylinder, a gas compressor, a high pressure vessel, an oven in the high pressure vessel, a process gas line System for supplying process gas from the Gas cylinder to the high pressure vessel over the gas compressor, a drain pipe system, which with the process gas piping system between the Gas compressor and the high pressure vessel connected is to release a pressure to the atmospheres air, a safety line system, which with the process gas piping system between the Gas compressor and the high pressure vessel is connected and has a safety device which is fragile when the pressure in the high pressure vessel rises above a predetermined value release the pressure, and a first opening and Shut-off valve, which in the process gas Lei system is arranged, characterized by a process gas manifold, which with the process gas Pipe system between the gas cylinder and the Gas compressor is connected to an oxygen Concentration sensor, which in the process gas manifold to determine a concentration tion of oxygen arranged in the process gas is a feed-side blocking device, which can be actuated when the oxygen concentration tration sensor an oxygen concentration which is higher than a predetermined value, to close the first opening and closing vein  tiles in the process gas piping system and for Interrupting the power supply to the furnace the high pressure vessel, through a second opening and closing valve, which in the process gas Pipe system between the gas cylinder and the Gas compressor is provided, a third opening opening and closing valve, which is in the drain Line system is interposed, a fourth Opening and closing valve, which in the safe unit line system is interposed, one Flow switch, which in the safety Pipe system for determining an outflow of the process gas from the safety line systems is provided when the gas flow in the high pressure vessel under a predetermined pressure drops after the safety device is broken Chen, and by a drain-side blockage direction which can be actuated when the current mungsschalter determined that process gas from flows out of the safety line system to second and fourth opening and closing valves close to the third opening and closing valve open to the operation of the compressor to stop and to provide energy for the Interrupt the furnace in the high pressure vessel. 9. Blocking device for an isostatic hot pressing device with a gas cylinder, a Gas compressor, a high pressure vessel, an oven in the high pressure vessel, a process gas line system for supplying process gas from the gas  cylinder to the high pressure vessel over the gas com pressor, a drain pipe system, which with the Process gas piping system between the gas com pressor and the high pressure vessel for dispensing a Pressure to the atmosphere, one Safety line system, which with the process rengsgas pipe system between the gas compressor and the high pressure vessel is connected and a Si safety device which is breakable, when the pressure in the high pressure vessel is above a predetermined value increases to release the pressure sen, and with a first opening and closing vein til, which in the process gas piping system interposed characterized by a process gas manifold, which with the process gas Pipe system between the gas cylinder and the gas compressor is connected to an oxygen concentration tration sensor, which in the process gas collection is provided to a concentration of Determine oxygen in the process gas, a feed-side blocking device, which be is operable when the oxygen concentration sensor determines an oxygen concentration, wel che is higher than a predetermined value by which first opening and closing valve of the process gas piping system and to close an ener Power supply for the furnace in the high pressure vessel interrupt, a second opening and closing valve, which in the process gas line sy stem between the gas cylinder and the gas compressor  a third opening and closing is provided valve, which in the drain pipe system between is switched, a fourth opening and Shut-off valve, which is in the safety line System is provided for a first thermocouple Measure a temperature of the process gas line systems near a gas inlet located in a closure element of the high pressure vessel is formed, a second thermocouple for measurement a temperature of the drain pipe system close to that third opening and closing valve, a third Thermocouple for measuring a temperature of the Safety line system close to the safety device, and a drain-side blocking device which can be actuated when one of the tempe rature signals from the first, the second and the third thermocouple a predetermined value exceeds, to close the second and the fourth opening and closing valve, for opening the third opening and closing valve to Stop the operation of the gas compressor and to Interruption of a power supply for the furnace in the high pressure vessel. 10. Blocking device for an isostatic hot Press device with a gas cylinder, a gas compressor, a high pressure vessel, an oven in which High pressure vessel, a process gas piping system for supplying process gas from the cylinder to the high pressure vessel via the gas compressor, one Drain pipe system, which with the procedure  gas piping system between the gas compressor and connected to the high pressure vessel for delivery a pressure to the ambient air, a safe unit management system, which with the process gas piping system between the gas compressor and the high pressure vessel is connected and a safe device which is breakable, when the pressure in the high pressure vessel is above a predetermined value increases to decrease this pressure leave, and a first opening and closing ven til, which in the process gas piping system interposed characterized by a process gas manifold, which with the process gas Pipe system between the gas cylinder and the Gas compressor is connected to an oxygen Concentration sensor, which in the process gas manifold to determine a concentration tion of oxygen in the process gas hen is a feed-side blocking device, which can be actuated when the oxygen concentration tration sensor an oxygen concentration which is higher than a predetermined value, to close the first opening and closing vein tils in the process gas piping system and Disconnect a power supply for the furnace in the High pressure vessel, a second opening and closing valve which is in the process gas piping system between the gas cylinder and the gas compressor is arranged, a third opening and closing valve, which in the drain pipe system between  is switched, a fourth opening and Shut-off valve, which is in the safety line system is interposed, a flow switch, which in the safety management system stem for determining a process gas outflow is arranged from the safety line system, when the pressure in the high pressure vessel is below one predetermined pressure drops after the safe is broken, a first thermo element for measuring a temperature of the process gas piping system near a gas inlet, which in a closure element of the high pressure Ge is formed, a second thermocouple for measuring a temperature of the drain pipe system stems near the third opening and closing valve, a third thermocouple for measuring a Temperature of the safety line system close to Safety device and a bloc on the outlet side Kiereinrichtung, which can be actuated when the Flow switch the flow of flow gas determined from the safety line system and if any of the temperature signals from the first one, the second and the third thermocouple exceeds a predetermined value to close the second and fourth opening and closing valves, to open the third opening and closing vein tiles, to stop the operation of the gas compressor sors and to interrupt a power supply for the furnace in the high pressure vessel.   11. Blocking device for an isostatic hot pressing device with a first furnace for a Oxygen atmosphere, with a second furnace for an atmosphere different from an oxygen atmosphere, a high pressure vessel, which is suitable either the first or the second oven record, a gas cylinder, a gas compressor sor, a process gas piping system for supply tion of process gas from the gas cylinder to the High pressure vessel via the gas compressor, a drain Pipe system, which with the process gas Pipe system between the gas compressor and the High pressure vessel is connected to a pressure for Venting ambient air, a safety Pipe system, which with the process gas Lei system between the gas compressor and the High pressure vessel is connected and a safety device which is breakable if the pressure in the high pressure vessel over one increased value to release the pressure, and a first opening and closing valve, wel ches in the process gas piping system between is switched characterized by a process gas manifold, which with the process gas Pipe system between the gas cylinder and the Gas compressor is connected to an oxygen Concentration sensor, which in the process gas manifold to determine a concentration  of oxygen is located in the process gas a discrimination circuit for difference between the first and the second furnace, a feed-side blocking device, which can be actuated when the oxygen concentration sensor determines an oxygen concentration, which is higher than a predetermined value and the discrimination circuit the second oven average, to close the first opening and Closing valve in the process gas line system stem and to interrupt a power supply for the second furnace in the high pressure vessel second opening and closing valve, which in the Process gas piping system between the gaszy Linder and the gas compressor is arranged third opening and closing valve, which in the drain pipe system is interposed, a fourth opening and closing valve, which is provided in the safety line system, a flow switch, which in the safety Pipe system for determining an outflow of process gas from the safety line system stem is arranged when the pressure in the high pressure vessel drops below a predetermined pressure, after the safety device is broken, and a drain-side blocking device which can be actuated when the flow switch is fixed ensures that process gas from the safety Pipe system flows out to the second and that to close the fourth opening and closing valve, to open the third opening and closing valve,  to interrupt the operation of the gas compressor and to supply power from the furnace to the Interrupt high pressure vessel. 12. Blocking device for an isostatic hot pressing device with a first furnace for a Oxygen atmosphere, a second furnace for one Atmosphere different from an oxygen atmosphere, a high pressure vessel, which choice wise to record the first and second Oven is suitable, a gas cylinder, a gas compressor, a process gas piping system for Supply of process gas from the gas cylinder the high pressure vessel via the gas compressor, one Drain pipe system, which with the procedure gas piping system between the gas compressor and the high pressure vessel is connected to a pressure to degrade to the ambient air, a sure thing unit management system, which with the process gas piping system between the gas compressor and the high pressure vessel is connected and a safe device which is breakable, when the pressure in the high pressure vessel is above a predetermined value increases to decrease this pressure build, and a first opening and closing valve, which in the process gas piping system between is switched characterized by a process gas manifold, which with the process gas Pipe system between the gas cylinder and the Gas compressor is connected to an oxygen concentration  tration sensor, which in the process gas Collective line for determining a concentration of oxygen is located in the process gas a discrimination circuit to distinguish between the first and the second furnace, a feed-side blocking device, wel che is operable when the oxygen concentration tion sensor determines an oxygen concentration, which is higher than a predetermined value and the discrimination circuit the second furnace determines the first opening and closing ven til close in the process gas piping system and a power supply for the oven to prevent in the high pressure vessel, a second Opening and closing valve, which in the ver Fahrensgas pipe system between the gas cylinder which and the gas compressor is arranged, a third tes opening and closing valve, which in the Drain pipe system is interposed, a fourth opening and closing valve, which is provided in the safety line system, a first thermocouple for measuring a temperature process gas piping system near one Gas inlet, which in a closure element of the High pressure vessel is formed, a second Thermocouple for measuring a temperature of the Drain pipe system near the third public opening and closing valves, a third thermo oil ment for measuring a temperature of the safety Pipe system near the safety device and a drain-side blocking device which  can be actuated when one of the temperature signals to the first, second and third thermo element exceeds a predetermined value, around the second and fourth opening and closing valve to close the third opening and Opening the shut-off valve in order to operate the Stop gas compressor and an energy ver Supply for the furnace in the high pressure vessel too break. 13. Blocking device for an isostatic hot pressing device with a first furnace for a Oxygen atmosphere, with a second furnace for an atmosphere different from an acid atmosphere, a high pressure vessel, which for optional inclusion of the first and the second Oven is suitable, a gas cylinder, a gas compressor, a process gas piping system for supplying process gas from the gas cylinder linder to the high pressure vessel over the gas compressor sor, a drain pipe system which is connected to the Process gas piping system between the gas com pressor and the high pressure vessel to drain the Pressure in the ambient air, one Safety line system, which with the Ver Fahrensgas piping system between the Gaskom pressor and the high pressure vessel is connected and has a safety device which zer is breakable if the pressure in the high pressure vessel rises above a predetermined value by the Relieve pressure, and a first opening and  Shut-off valve, which in the process gas Lei intermediate system, characterized by a process gas manifold, which with the process gas Pipe system between the gas cylinder and the Gas compressor is connected to an oxygen Concentration sensor, which in the process gas manifold is provided to a concentra tration of oxygen in the process gas to provide a discrimination circuit for Distinguish between the first and the second Furnace, a feed-side blocking device, wel che is operable when the oxygen concentration tration sensor an oxygen concentration averages which is higher than a predetermined one Value and the discrimination circuit the second Oven detects the first opening and closing valve in the process gas piping system close and power supply for the two interrupt the furnace in the high pressure vessel second opening and closing valve, which in the process gas piping system between the gas cylinder and the gas compressor is arranged, a third opening and closing valve, which in the Drain pipe system is provided, a fourth Opening and closing system, which in the safe unit line system is provided, a stream switch, which is in the safety line system is arranged to prevent an outflow of ver gas from the safety pipe system determine if the gas pressure in the high pressure vessel  falls below a predetermined value after the safety device is broken first thermocouple for measuring the temperature in the process gas piping system near one Gas inlet, which in a closure element of the High pressure vessel is formed, a second Thermocouple for measuring a temperature of the Drain line system near the third opening and closing valve, a third thermocouple Measurement of a temperature of the safety line systemes near the safety device, and through a drain-side blocking device, which be is operable when the flow switch is off flow of process gas from the safety Line system determined and if one of the tempe rature signals from the first, the second and the third thermocouple a predetermined value exceeds to close the second and four opening and closing valve to open the third opening and closing valve, for stopping the operation of the gas compressor to interrupt a power supply for the furnace in the high pressure vessel.