DE102017005984A1 - Silencer device, pressure reduction device and tank system with a pressure reduction device - Google Patents

Abstract

The invention relates to a silencer device (12) for a pressure reduction device (10) of a tank system, wherein the silencer device (12) has an inlet opening which is adapted to be connected to an outlet valve (16) of the tank system and at least one silencer element which extends between the inlet opening and an outlet opening (24) of the muffler device (12) and is adapted to reduce a sound pressure of a fluid flowing from the inlet opening to the outlet opening (24). The invention further relates to a pressure reduction device (10) with a muffler device (12), and a tank system with a pressure reduction device (10) according to the invention.

Description

The invention relates to a silencer device for a pressure reduction device, a pressure reduction device with a silencer device, and a tank system with a pressure reduction device.

Usually, tank systems, such as vacuum tank systems, pressure reduction devices, by means of which an existing in the tank system pressure can be at least partially degraded in a controlled manner. This is often done via a valve, such as a ball valve, which can be opened when the pressure of a fluid in the tank system has reached a predetermined value, so that the fluid under elevated pressure can escape at least partially from the tank system. Once a sufficient amount of fluid has been blown off and the pressure in the tank system is reduced to a predetermined value, the valve can be closed again to avoid unnecessary leakage or escape of fluid from the tank via the valve or safety valve.

When venting or escape of the fluid from the tank system, it often leads to noise. The greater the overpressure to be relieved in the tank system, the greater the noise that is often generated when the fluid is blown off. In particular, the noise during the blowing off of the fluid can lead to an undesirable noise load in the vicinity of the tank system. Especially in noise-sensitive areas, such as in residential areas and / or near hospitals or clinics, the regular operation of a tank system due to the noise during blow-off of fluid to reduce excess pressure can thereby interfere.

The invention is therefore based on the object to reduce the operating noise of a tank system when blowing off fluid, in particular for reducing an overpressure.

The object is achieved by a muffler device, a pressure reduction device and a tank system with the features of the respective independent claims. Preferred embodiments are subject matters of the dependent claims.

In a first aspect, the invention relates to a muffler device for a pressure reduction device of a tank system, wherein the muffler device has an inlet opening, which is adapted to be connected to an outlet valve of the tank system. In addition, the muffler device has at least one muffler element, which extends between the inlet opening and an outlet opening of the muffler device and is adapted to reduce a sound pressure of a fluid flowing from the inlet opening to the outlet opening.

In a further aspect, the invention relates to a pressure reduction device for a tank system, comprising an outlet valve which is adapted to the tank system to close fluid-tight in the closed state and to allow in the open state, a discharge of a fluid from the tank system to a pressure of the fluid in to reduce the tank system. Furthermore, the pressure reduction device comprises a muffler device, which is connected to the outlet valve such that the fluid flowing out of the tank system escapes via the muffler device. The muffler device is set up in such a way that it reduces a sound pressure resulting from the outflowing fluid.

In a further aspect, the invention relates to a tank system with a pressure reduction device according to the invention.

Preferably, the muffler device and / or the pressure reduction device are designed for liquid and / or gaseous fluids. In particular, the fluid may be in the form of gas, such as gaseous nitrogen, carbon dioxide, oxygen, rare gas or other gas. Furthermore, the pressure reduction device and / or the muffler device may also be suitable for tank installations, which are designed to store a liquid fluid, wherein during or before the outflow, the fluid at least partially passes into the gas phase.

The invention offers the advantage that the noise during the blowing off of fluid from the tank system to reduce overpressure can be reduced without adjustments to the safety-relevant blow-off of fluid from the tank system are necessary. In particular, the invention offers the advantage that the noise produced by the blowing off of fluid can be attenuated by means of the silencer device in such a way that the noise pollution in the surroundings of the tank system can be significantly reduced. This offers the advantage that the operation of a tank system using the invention is possible even in noise-sensitive environments, without the regular operation of the tank system and in particular by the blowing off of fluid in the presence of an overpressure in the tank system to a noise in the environment of the tank system respectively.

Furthermore, the invention has the advantage that a muffler device according to the invention and / or a pressure reduction device according to the invention can also be retrofitted into an existing tank system, which already installed tank systems, especially in noise-sensitive environments, can be improved to the effect that a noise pollution caused by these tank systems whose environment can be reduced for the future.

The invention also offers the advantage that the muffler device can preferably be integrated into the pressure reduction device, so that these preferably form an integral unit. As a result, the invention offers the possibility of being able to provide a compact pressure reduction device, whereby the space requirement and / or the external appearance of the pressure reduction device and / or the tank system can be reduced or improved.

Preferably, the at least one muffler element is designed as an absorption muffler and / or as a reflection muffler. This offers the advantage that the at least one silencer element can be specifically set up to reduce or filter out certain frequency ranges from the noise development during the blowing off of the fluid. For example, an absorption muffler may be advantageous in filtering out high frequencies of noise, while a reflection muffler may be particularly suitable for filtering low frequencies. This offers the advantage that the at least one silencer element can be flexibly adapted to the frequency spectrum to be filtered. In particular, a single muffler element may be formed either as an absorption muffler or as a reflection muffler. According to another preferred embodiment, the at least one muffler element may be formed as an absorption muffler and as a reflection muffler by having features and / or components of both muffler types.

Preferably, the muffler device comprises a plurality of muffler elements. In particular, different types of silencer elements can be combined with each other. For example, it is possible that the plurality of silencer elements has at least one absorption silencer and at least one reflection silencer. Alternatively, all the muffler elements of the plurality of muffler elements may be formed as a reflection muffler or as an absorption muffler. The combination of several silencer elements offers the advantage that different frequency ranges can be filtered by the individual silencer elements and thus particularly broad frequency ranges of the noise development can be filtered or attenuated by a suitable combination of a plurality of silencer elements.

Preferably, the muffler elements of the plurality of muffler elements are successively arranged along a flow direction of the fluid flowing to the outlet port. This offers the advantage that different frequency ranges of the noise development can be sequentially filtered or attenuated in succession, while the fluid flowing through the muffler device moves through the individual muffler elements.

Preferably, at least one silencer element of the at least one silencer element is designed as an absorption silencer which has a perforated tube and an absorption material surrounding the perforated tube. Due to this design of the absorption silencer this can be particularly advantageous for the filtering or attenuation of high frequencies of noise. As the effluent flows through the perforated tube, sound waves may exit the perforated tube at least partially through the perforations to be at least partially absorbed in the surrounding absorbent material. The absorbent material may preferably comprise a glass fiber fleece and / or glass wool and / or rock wool.

Preferably, at least one muffler element of the at least one muffler element is designed as a reflection muffler, which has a plurality of sections with diameters different from each other. Due to the different diameters of the plurality of sections, the fluid flowing through the reflection muffler successively passes through regions having cross-sectional enlargements and cross-sectional constrictions. As a result, a reduction of sound pressure peaks of the noise development by the flowing fluid can be achieved, which is why the reflection muffler can be particularly suitable for filtering or reduction of low frequencies.

Preferably, the muffler device further comprises at least one sintered filter, which is arranged at the outlet opening of the muffler device. This offers the advantage that penetration of solid contaminants and / or insects through the outlet opening into the muffler device can be prevented. In this way can malfunction, which caused, for example, due to clogging and / or deposits in the muffler device by penetrating impurities and / or insects are avoided.

Preferably, the muffler device has a housing which surrounds the muffler device at least partially, wherein preferably an interior of the housing is at least partially filled with an insulating material. This can offer the advantage that thereby an insulation or attenuation of vibration noise can be achieved, whereby the noise of the pressure reduction device can be further reduced. For example, the housing may be formed as a jacket tube, which is filled, for example, with a foam material as the material. In particular, the insulating material may be arranged such that the insulating material fills the entire remaining volume between inner walls of the housing and disposed within the housing components, such as the at least one muffler element fills.

Preferably, the pressure reduction device is configured such that the outlet valve has a ball valve. This offers the advantage that the pressure reduction device can be reliably opened and closed even when the fluid in the tank system has a very high pressure and in particular a very large overpressure.

In particular, a pressure reduction device according to the invention preferably also has a silencer device according to the invention. In addition, the pressure reduction device preferably also has a switching unit, which is set up to control and / or regulate the outlet valve. For example, the switching unit may be integrated in a control cabinet, which is preferably connected to the pressure reduction device and / or with the muffler device. This offers the advantage that the pressure reduction device can be provided with an associated switching unit compact design.

Preferably, the pressure reduction device further comprises a pressure sensor for determining a blow-off pressure of the fluid from the tank system, wherein the pressure sensor is connected to the switching unit and / or is integrated in the switching unit. This allows the pressure reduction device can independently make a discharge of fluid from the tank system when the pressure of the fluid in the tank system reaches a predetermined value. Preferably, the pressure reduction device and / or the switching unit may be equipped with a timer, for example, to perform a blow off of fluid, preferably at weekends and / or times of the day, at which this is perceived as less disturbing than at other times. For example, bleeding of fluid may preferably be done only during the day during weekdays to avoid disturbance to residents outside of these times. For example, a tolerance range can be provided within which a blow-off of fluid should take place before a maximum overpressure is reached, in which an immediate blow-off of fluid is necessary for safety reasons. For example, a blow-off can already take place when the overpressure is within a suitable time for blowing in a range between 5 and 10 bar, although the maximum possible and / or allowable pressure is not reached, such as 18 bar for nitrogen tank systems or 22 cash at carbon dioxide tanks.

Further advantages and embodiments of the invention will become apparent from the description and the accompanying drawings.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

• Figurenbeschreibung
• 1A und 1B zeigen schematisch eine bevorzugte Ausführungsform einer erfindungsgemäßen Druckreduktionsvorrichtung für eine Tankanlage in einer Querschnittdarstellung in Frontalansicht und in Seitenansicht.
• 2A bis 2C zeigen eine bevorzugte Ausführungsform einer erfindungsgemäßen Druckreduktionsvorrichtung für eine Tankanlage in fotografischen Abbildungen.

The invention is schematically illustrated by means of an embodiment in the drawings and will be described below with reference to the drawings.

• figure description
• 1A and 1B schematically show a preferred embodiment of a pressure reduction device according to the invention for a tank system in a cross-sectional view in frontal view and in side view.
• 2A to 2C show a preferred embodiment of a pressure reduction device according to the invention for a tank system in photographic images.

Detailed description of the drawing

1A shows a schematic cross-sectional representation of a preferred embodiment of a pressure reduction device according to the invention 10 in frontal view. 1B shows the pressure reduction device 10 out 1A in side view. The pressure reduction device 10 has a muffler device 12 on, which via a connecting line 14 with an exhaust valve 16 connected is. The outlet valve 16 is designed as a ball valve, by means of which an opening and closing of a tank system (not shown) for the controlled discharge or blowing off a fluid from a with the pressure reduction device 10 connected tank system is enabled. The outlet valve 16 is doing by a switching unit 18 controlled or regulated, ie that the switching unit 18 the opening state of the exhaust valve 16 controls or regulates. In particular, in the switching unit 18 a pressure sensor (not shown) may be integrated, which is designed to determine the pressure or overpressure of the fluid in the tank system. The switching unit 18 can then on the basis of the pressure detected by the pressure sensor or overpressure of the fluid in the tank system, a controlled blowing off or flowing out of the fluid via the outlet valve 16 make.

That from the exhaust valve 16 outflowing fluid passes through the connecting line 14 into the muffler device 12 , The silencer device 12 has the first silencer element an absorption silencer 20 on which a perforated tube 20a having, in the vertical direction extending centrally in the muffler device 12 is arranged. The perforated tube 20a may have a cylindrical or a different shaped cross-section. The perforated tube 20a extends according to the preferred embodiment shown from the upper end of the muffler device 12 at which this with the connecting line 14 is connected, almost to the lower end of the muffler device 12 where these with a mounting plate 30 is equipped to the pressure reduction device 10 for example, to be fixed to the ground. Furthermore, the absorption silencer has 20 an absorption material 20b on which the perforated tube 20a surrounds almost its entire length. On the one hand serves the absorption material 20b to do so, through the perforations of the perforated tube 20a To absorb penetrating sound waves, and on the other, to escape the through the absorption muffler 20 flowing fluid in the lateral direction to prevent. At the bottom has the perforated tube 20a a section 20c which is not of the absorbent material 20b is surrounded, so in section 20c that through the absorption silencer 20 flowing fluid can escape laterally.

After that by the absorption silencer 20 flowing fluid from this in the section 20c escaped, the fluid enters a second muffler element, which serves as a reflection muffler 22 is trained. The reflection silencer 22 has substantially the shape of a hollow, cylindrical wall, which is concentric, parallel to the perforated tube 20a of the absorption silencer 20 extends. In particular, the reflection silencer 22 arranged such that this the absorption silencer 20 ie the perforated tube 20a and the absorbent material 20b surrounds and / or encloses. Although not apparent from the cross-sectional view, the reflection muffler 22 preferably a round cross-section which extends completely around the absorption muffler 20 extends around.

The reflection silencer 22 has several sections 22a on, which have different diameters from each other. In particular, the sections 22a arranged such that when flowing through the fluid through the reflection muffler 22 result in multiple sites with a cross-sectional taper or a cross-sectional widening. As already explained above, this serves to average out any peaks in the sound level and in this way in particular filters out or mitigates low frequencies in the frequency spectrum of the flow noises. The reflection silencer 22 is arranged such that when flowing through the reflection muffler, the fluid flows upwards again, ie opposite to the flow direction in the absorption muffler 20 , and up to the outlet openings 24 the muffler device 12 arrives. At the top, the muffler device 12 several outlet openings 24 on, on each of which a sintered filter 26 is arranged, which serves to prevent the ingress of contaminants or insects.

At the top of the muffler device 12 is a diverter 28 formed, which from the outlet openings 24 deflects flowing fluid in the vertical direction downwards. In this way, not only the exiting fluid, but also from the muffler device 12 Exiting sound or the exiting caused by the flowing fluid noise down in the direction of the mounting plate 30 distracted. This has the advantageous effect that the from the muffler device 12 emerging sound not in the horizontal direction of the pressure reduction device 10 away, but towards the mounting plate 30 , and if it is fixed to the ground, towards the ground. In this way, the disturbing influences of the already reduced noise, which are caused by the outflowing or blown off fluid can be minimized again.

According to the embodiment shown, the switching unit 18 at least partially on a control cabinet 32 arranged. In the control cabinet 32 can more for the operation of the pressure reduction device 10 intended instruments are housed. This offers the advantage of being in the control cabinet 32 accommodated elements may be protected from mechanical effects and may optionally be locked therein to prevent unauthorized access to the elements therein. According to Other embodiments may also be the switching unit 18 in the control cabinet 32 be housed.

In addition, the muffler device 12 a housing 34 on, which surrounds the silencer elements at least partially. According to the embodiment shown, the housing 34 is formed as a cylindrical tube, which is arranged around the muffler elements around. The space between the silencer elements and the housing 34 is with a damping material 36 filled. The insulation material 36 For example, may be a foam-like material with which the gap between the muffler elements and the housing 34 can be foamed or filled. The housing 34 and the insulating material serve to reduce sound waves and / or vibrations caused, for example, by the fluid flowing through the muffler elements. The housing 34 and the insulation material 36 do not extend completely to the upper end of the muffler device 12 but end under the outlet openings 24 so that the outlet openings 24 lie freely and an outflow of fluid from the muffler device 12 is possible.

The 2A to 2C show a preferred embodiment of a pressure reduction device according to the invention for a tank system in photographic images from different angles. The pressure reduction device 10 is almost entirely made of stainless steel. In particular, it can be seen that the housing 34 the silencer device 12 einhaust and together with the deflector 28 closes against the environment and prevents in this way a mechanical action on the muffler elements.

The pressure reduction device 10 can be completely pre-assembled, especially including the control cabinet 32 and the connection valve 16 , By means of the mounting plate 30 can the pressure reduction device 10 For example, be attached next to a tank system on the tank foundation or on the ground.

Depending on the pressure of the fluid in the tank system or depending on the pressure on the connection valve 16 applied pressure can with a pressure reduction device 10 According to the preferred embodiment shown, a reduction or attenuation of the acoustic emission by about 30 dB to 50 dB can be achieved.

In the following Table 1 are determined in a comparison measurement sound pressure, which from a compressed air source with a pressure of 10 bar, which over a ¼ "sleeve with the length 60 mm free blow (middle column) and the pressure reduction device according to the invention 10 according to the in 2A to 2C opposite shown preferred embodiment (right column). Table 1 Distance from the sound source Conventional pressure reduction device Pressure reduction device according to the invention according to a preferred embodiment 1 meter 102.7 dB 53.6 dB 5 meters 90.7 dB 46.9 dB 10 meters 76.2 dB 44.2 dB 15 meters 72.1 dB 43.1 dB 20 metres 70.6 dB 43.5 dB

The measured values shown in Table 1 illustrate that with a pressure reduction device according to the invention 10 according to the in 2A to 2C On average, a reduction of the switching pressure by about 44 dB compared to the conventional pressure reduction device can be achieved.

LIST OF REFERENCE NUMBERS

10

Pressure reduction device

12

muffler device

14

connecting line

16

connection valve

18

switching unit

20

absorption silencer

20a

perforated tube

20b

absorbent material

20c

Section of the perforated tube

22

reflection silencer

22a

Section of the reflection silencer

24

outlet

26

Sinterfilter

28

Umlenkblende

30

mounting plate

32

switch cabinet

34

casing

36

insulation

Claims (14)

A muffler device (12) for a pressure reduction device (10) of a tank system, the muffler device (12) having an inlet opening adapted to be connected to an outlet valve (16) of the tank system, and at least one muffler element extending between the inlet opening and an outlet opening (24) of the muffler device (12) and configured to reduce a sound pressure of a fluid flowing from the inlet opening to the outlet opening (24). Silencer device (12) according to Claim 1 wherein the at least one muffler element is designed as an absorption muffler (20) and / or as a reflection muffler (22). Silencer device according to Claim 1 or 2 comprising a plurality of silencer elements. Silencer device (12) according to Claim 3 wherein the plurality of muffler elements are sequentially arranged along a flow direction of the fluid flowing to the discharge port (24). A muffler device (12) according to any one of the preceding claims, wherein at least one muffler element of the at least one muffler element is formed as an absorption muffler (20) having a perforated tube (20a) and an absorbent material (20b) surrounding the perforated tube (20a). A muffler device (12) according to one of the preceding claims, wherein at least one muffler element of the at least one muffler element is formed as a reflection muffler (22) having a plurality of sections (22a) with different diameters from each other. A muffler device (12) according to one of the preceding claims, further comprising at least one sintered filter (26) which is arranged at the outlet opening (24) of the muffler device (12). Silencer device (12) according to one of the preceding claims, wherein the silencer device (12) has a housing (34) which at least partially surrounds the silencer device (12), preferably an interior of the housing (34) being at least partially covered with an insulating material (36). is filled. Pressure reduction device (10) for a tank system, comprising: - An outlet valve (16) which is adapted to fluid-tightly close the tank system in the closed state and to allow in the open state, a discharge of a fluid from the tank system to reduce a pressure of the fluid in the tank system; a muffler device (12) which is connected to the outlet valve (16) such that the fluid flowing out of the tank system escapes via the muffler device (12), and wherein the muffler device (12) is arranged such that it flows through the exhaust gas Fluid resulting sound pressure is reduced. Pressure reduction device (10) after Claim 9 wherein the outlet valve (16) comprises a ball valve. Pressure reduction device (10) according to one of Claims 9 and 10 wherein the muffler device (12) according to one of Claims 1 to 8th is trained. Pressure reduction device (10) according to one of Claims 9 to 11 , further comprising a switching unit (18) adapted to control and / or regulate the outlet valve (16). Pressure reduction device (10) after Claim 12 , further comprising a pressure sensor for determining a blow-off pressure of the fluid from the tank system, wherein the pressure sensor is connected to the switching unit (18) and / or integrated in the switching unit (18). Tank system with a pressure reduction device (10) according to one of Claims 9 to 13 ,

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