JPH0640896Y2 - silencer - Google Patents

Description

[Detailed Description of the Invention] "Industrial application field" This invention is for suppressing noise used when discharging gas from a tank for storing liquefied gas, compressed gas, etc., or a tank such as a tank truck, gas cylinder, etc. Regarding the silencer.

"Prior art" As is well known, a tank for liquefied gas or compressed gas stores residual gas so that the atmosphere does not flow into the tank and pollute the inside of the tank at the end of use of the gas stored in the tank. Is normal. For this reason, when a high-pressure storage tank such as a tank truck or a gas cylinder is filled with a gas such as oxygen or nitrogen under high pressure, the inside of the storage tank is kept under pressure so that contaminants such as the atmosphere are not mixed from the storage tank prior to filling. It is necessary to discharge the remaining gas.

By the way, when such residual gas is discharged, the atmosphere vibrates due to the energy when the residual gas in a pressurized state is released into the atmosphere and expands rapidly. Vibration or the like occurs, which causes noise such as vibration noise. And, as a conventional one for coping with and suppressing such noise, a muffler chamber having a plurality of rectifying shelves inside, or made of porcelain, glass, metal or the like is filled with a large number of honeycomb-shaped fillers, for example. There is a muffler. That is, if the silencer chamber or the inlet of the muffler is connected to the outlet of the storage tank and the residual gas is discharged into the box, the residual gas is a bent flow path partitioned by a flow straightening shelf in the box, or After passing through a curved flow path formed randomly by the packing, it collides with the flow straightening shelves or the packing and consumes energy gradually, and then is discharged from the muffler or the outlet of the muffler. Therefore, by using these muffling chambers and mufflers, it is possible to reduce the conversion of energy due to the rapid expansion of residual gas into vibrations of the surrounding atmosphere and vibrations of the exhaust pipe, etc., and as a result, this rapid expansion It reduces the noise caused by.

"Problems to be solved by the invention" However, in the above-mentioned muffler and muffler, the size of the whole becomes large because a plurality of rectifying shelves are provided or a large number of fillings are filled, and therefore, as a regular item. There is a problem that it is difficult to load it on a tank truck and it is inconvenient to handle, and it is difficult to reduce desired noise with a conventional muffler.

"Means for Solving Problems" The silencer of the present invention is composed of a cylindrical porous molded body with a lid, and a sound deadening member that causes a pressure loss in passing gas and an opening side of the sound deadening member are integrally fixed. A tubular main body fixing part having a concave portion on one end side, a tubular flanged joint connected to the other end side of the main body fixing part, and a main body provided in contact with the flange of the joint and attached to the joint The above problem was solved by providing a protection tube that covers the entire length of the sound deadening member fixed to the fixing portion and the main body fixing portion and discharges the gas passing through the sound deadening member from one opening.

The present invention will be described in detail below. The sound deadening member is made of a porous material, and the porous material is a porous sintered metal, a mesh-shaped ceramic, or a porous silicic acid. Molded bodies made of inorganic materials such as calcium are used, and among them, mechanical strength is high,
Sintered metal is preferably used because it has excellent formability. Further, the shape of the muffling member may be such that it can cover the discharge port of the storage tank when attached to the discharge port,
It is a hollow cylinder with a lid, a hemispherical surface, a plate, or the like.

The connecting member is provided integrally with the sound deadening member, and is configured to be attachable to and detachable from the discharge port of the storage tank so that the sound deadening member can be airtightly attached to the discharge port. Equipped with a screw to enable screwing, a fitting groove or a fitting strip to enable connection by fitting, and a known locking mechanism that enables connection and fixation. Is.

[Example] Hereinafter, the present invention will be described more specifically with reference to the drawings.

The example described here is a case where the silencer of the present invention is applied to a silencer attached to the gas outlet of a tank truck.

FIG. 1 is a diagram showing a silencer attached to a gas discharge port of a tank truck, and reference numeral 1 in the figure is a silencer. The silencer 1 includes a cylindrical silencing member 2 with a lid, a connecting member 3 integrally provided on the opening side of the silencing member 2, and a protective tube 4 attached to the connecting member 3.

The sound deadening member 2 is made of a sintered metal such as a copper alloy and is porous so that compressed gas can pass therethrough and pressure loss can be appropriately generated in the compressed gas. Further, the sound deadening member 2 has a sufficiently large thickness so as to withstand the pressure applied by the compressed gas and the like, and has high mechanical strength so as to withstand impact and the like.

The connection member 3 includes a main body fixing portion 5 and a joint 6. The main body fixing portion 5 is made of a metal tube and has a concave portion 7 formed on one opening side for fitting and fixing the sound deadening member 2, and a male screw on the outer peripheral surface on the other opening side. 8 is formed. The joint 6 is made of metal and has a flange 9 formed on the outer peripheral surface on one opening side and a male screw 10 formed on the outer peripheral surface on the other opening side. A female screw 11 to be screwed into the male screw 8 of the main body fixing portion 5 is formed on the surface. Then, based on such a configuration, the joint 6 can be attached to and detached from the main body fixing portion 5 by screwing.

The protection tube 4 is made of a metal pipe such as stainless steel, and is fixed to the flange 9 of the joint 6 by force fitting. Further, the length of the protective tube 4 is such that, when fixed to the joint 6 as shown in FIG. 1, the main body fixing portion 5 screwed to the joint 6 and the sound deadening member 2 fixed to the main body fixing portion 5. The exhaust gas from the muffling member 2 is made to cover the entire length of the muffling member 2 of the protection pipe 4.
It flows out only from the side opening 4a.

In order to discharge the residual gas such as liquid nitrogen from the tank of the tank truck using the silencer 1 having such a structure, first, as shown in FIG. Are stored in the protective tube 4.

Next, as shown in FIG. 2, the discharge pipe 12 of the tank truck vehicle
A coupler 14 prepared in advance is attached and fixed to an adapter 13 attached to the discharge port of the. Here, the coupler 14 has a lock mechanism and a packing 15, and the fixed cams 16 and 16 are rotated to lock the fixed portions 16a and 16a at the tips thereof into the fixed groove 13a of the adapter 13. By being pressed, it is fixed to the adapter 13 in an airtight manner. Further, the coupler 14 has a female screw formed on the inner peripheral surface on the opening side opposite to the side attached to the adapter 13.

Then, the prepared silencer 1 is connected to the discharge pipe 12 of the tank through the coupler 14 by screwing the male screw 10 of the joint 6 onto the female screw of the coupler 14.

Then, the valve of the tank is operated to discharge the residual gas in the tank through the silencer member 2 of the silencer 1 as shown by the arrow in FIG. Then, the residual gas causes a pressure loss due to resistance when passing through the muffling member 2, and the flow velocity becomes gentle due to consumption of energy and the like.
It is less likely to vibrate the ambient atmosphere, the exhaust pipe 12, etc., and thus noise generated due to vibration and the like is suppressed. In this case, for example, when the exhaust is performed without mounting the silencer 1, the noise of the level of 85 to 95 dB is reduced to the level of 55 to 65 dB.

The silencer 1 having such a structure is excellent in operability as compared with a conventional silencer room having a rectifying shelf because it is manufactured to be small and light, as well as having a superior noise suppressing effect. It will be easy to handle,
Furthermore, it will be possible to always equip a tank truck or the like. Further, since the sound deadening member 2 is made of porous sintered metal, it is easy to manufacture and the manufacturing cost is low. Furthermore, since it is made entirely of metal, it can withstand impacts and the like, and
It is extremely excellent in durability as it is prevented from deterioration due to sunlight, rain, etc. when it is used outdoors, and is particularly suitable for low temperature gas such as low temperature liquefied gas.

Further, when the protective pipe 4 is provided, the outflow direction of the exhaust gas is limited to one direction, so that it is possible to avoid the disadvantage that the exhaust gas pressurized when the residual gas is exhausted directly hits the human body and is protected from the outside. Therefore, it is possible to avoid applying an impact due to an external force, and even if the sound deadening member 2 is damaged due to an operation mistake or the like, an accident such as a broken piece hitting a human body is prevented.

The protective tube 4 may be omitted as it does not directly participate in the sound deadening effect.

Further, although the silencer of the present invention is applied to the tank truck vehicle in the above-mentioned embodiment, the silencer can also be applied to, for example, discharging the residual gas of the gas cylinder.

Further, although the connecting member 3 is composed of the main body fixing portion 5 and the joint 6 in the above-mentioned embodiment, it may be composed of only the main body fixing portion 5, in which case the protective tube 4 is fixed to the main body fixing portion 5. To do so. Further, the connecting member may be configured to include the coupler 14 shown in FIG.

Furthermore, although the sound deadening member 2 is made of a sintered metal in the above-mentioned embodiment, it may be made of a mesh-shaped ceramic material or a porous inorganic material such as calcium silicate, and the shape thereof is covered. It may be formed in a hollow cylindrical shape, a hemispherical shape, or a plate shape.

[Advantage of the Invention] As described above, the silencer of the present invention is made of a porous molded body having a cylindrical shape with a lid, and a sound deadening member that causes a pressure loss in passing gas and an opening side of the sound deadening member are integrally fixed. A tubular main body fixing part having a concave portion on one end side, a tubular flanged joint connected to the other end side of the main body fixing part, and a main body provided in contact with the flange of the joint and attached to the joint The sound deadening member fixed to the fixing portion and the main body fixing portion covers the entire length of the sound deadening member, and is provided with a protective tube for discharging the gas passing through the sound deadening member from one opening. It is possible to cause pressure loss in the residual gas, so that it is possible to reduce the vibration of the ambient atmosphere, the exhaust pipe, etc., and suppress the noise caused by this vibration. In addition, it is easy to carry because it can be made compact and lightweight, and it has better operability and easier to handle than a conventional silencer room equipped with a conventional rectifying shelf. It is possible to load it as a regular item in a car or the like.

Also, if a protective tube that covers the muffling member with a gap is provided,
The sound deadening member can be protected from external force, and the outflow direction of the gas discharged from the sound deadening member can be limited to one direction, whereby the exhaust gas pressurized when the residual gas is discharged directly hits the human body. It is possible to avoid the above, and even if the sound deadening member is damaged due to an operational error or the like, it is possible to prevent an accident such as a broken piece hitting a human body.

[Brief description of drawings]

FIGS. 1 and 2 are views showing an embodiment of the silencer of the present invention, FIG. 1 is a partial sectional view showing a schematic construction of the silencer, and FIG. 2 is a use of the silencer shown in FIG. It is a fragmentary sectional view for explaining a method. 1 ... Silencer, 2 ... Silencer, 3 ... Connection member, 4 ... Protective tube, 5 ... Main body fixed part, 6 ... Joint, 12 ... Discharge pipe, 13 ... Adapter, 14 ... Coupler .

Claims (1)

[Scope of utility model registration request] 1. A silencer, which is attached to an outlet when a gas is discharged from a storage layer, is made of a porous molded body having a cylindrical shape with a lid, and a sound deadening member that causes a pressure loss in passing gas; A tubular main body fixing part having a recess on one end side for fixing the opening side integrally, and a tubular flanged joint connected to the other end side of the main body fixing part,
A protective tube that is provided in contact with the flange of this joint and covers the entire length of the main body fixing part attached to the joint and the noise canceling member fixed to the main body fixing part, and discharges the gas passing through the noise canceling member from one opening. A silencer characterized by being provided.