JP2003083059A - Exhaust gas muffler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exhaust gas muffler capable of reducing the number of exhaust gas mufflers having less frequency used, miniaturizing a building storing various machine facilities, and reducing building cost. SOLUTION: Primary exhaust gas mufflers 15-1, 15-2 and secondary exhaust gas mufflers 17-1, 17-2 are connected with a first engine 10 and a second engine 11 is series, respectively, to allow a tertiary exhaust gas muffler 19 to be used by two engines 10, 11 as one unit in common.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust silencer suitable for silencing exhaust noise of a plurality of engines.

[0002]

2. Description of the Related Art Conventionally, for example, when a plurality of engines are installed in a pumping station, an exhaust silencer for reducing the exhaust sound is provided for each engine after considering the exhaust sound. Performance and quantity were designed and installed. For this reason, conventionally, an exhaust silencer connected to a plurality of engines is not shared, and for example, as shown in FIG. 3, two engines 80 and 81 silence noises of different frequencies. When an exhaust silencer is required, the exhaust silencers 83-1, 85-1, 87-1, 83 of the first to third orders are independently provided for each engine 80, 81.
-2, 85-2, 87-2 were attached, and in this example, six exhaust silencers were required.

However, in recent years, there has been a demand for miniaturization of various mechanical equipment such as pumping stations due to reduction of construction cost and amount of materials, and it has been necessary to reduce the installation space of the exhaust silencer.

On the other hand, when only the engine 80 is operated without operating all the engines 80, 81, a large number of unused exhaust silencers 83-2, 85-2, 87-2 are generated, and the effective use thereof is made. I couldn't.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide a building that can reduce the number of exhaust silencers that are infrequently used and store various mechanical equipment. An object of the present invention is to provide an exhaust silencer that can be reduced in size and construction cost.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention is an exhaust silencer having a structure in which exhaust gases emitted from a plurality of engines are silenced by a plurality of exhaust silencers connected in series. In one of the plurality of exhaust mufflers, one of the secondary and subsequent exhaust mufflers is shared by a plurality of engines.

In the present invention, the above-mentioned two engines are provided, and the primary engine and the secondary engine are respectively primary and
The secondary exhaust silencer is connected in series, and the third exhaust silencer is shared by two engines as one.

In the present invention, the above-mentioned three engines are provided, and the exhaust silencers up to the second order are connected in series to the first engine, and the second and third engines are connected. Connect the primary exhaust silencer to each one, and then connect the secondary exhaust silencer so as to be shared by one unit, and further connect one secondary exhaust silencer to the two secondary exhaust silencers. The feature is that they are connected so as to be shared by the units.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. [When Two Engines are Installed] FIG. 1 is a block diagram showing an exhaust path when two engines are installed at a pumping station. As shown in the figure, in this embodiment, the primary and secondary exhaust silencers 1 are separately provided for the exhaust pipes 13 drawn from the two engines 10 and 11.
5-1 and 15-2, 17-1 and 17-2 are connected in series, and the exhaust pipes 13 of the two secondary exhaust silencers 17-1 and 17-2 are gathered into one to form one unit. Third exhaust silencer 19
Are connected. That is, the third exhaust silencer 19 is shared by the two engines 10 and 11 as one unit.
It should be noted that the engines 10 and 11 in this embodiment are respectively installed in a pumping station, one engine 10 is a pump driving engine used during normal pump operation, and the other engine 11 is temporarily used when the amount of drainage is large. It is an engine for driving a pump that is commonly used.

For example, when only the engine 10 is operated during normal operation, the exhaust noise is gradually increased by the primary, secondary, and tertiary exhaust silencers 15-1, 17-1, 19 connected thereto. The sound is reduced.

On the other hand, if the drainage cannot be made in time by the operation of only one engine 10 and the operation of the engine 11 is started, that is, if the two engines 10, 11 are operated at the same time, the primary, Secondary exhaust silencer 1
After the exhaust noises of both of them are reduced stepwise by 5-1, 17-1, 15-2, 17-2, the exhaust noise of both of them is further reduced by one third exhaust silencer 19. Exhausted.

When the two engines 10 and 11 are simultaneously operated, the amount of exhaust gas processed by the tertiary silencer 19 is large, and therefore a silencer larger than the conventional silencer may be required as the tertiary silencer 19. Even so, the effect of reducing the installation space and the cost of parts by reducing the number of exhaust silencers by one is greater.

When a larger silencer than the conventional one is installed as the third silencer 19, the engine 10, 11 is normally operated.
Since all of the exhaust silencers 19 are not operated, there is a margin in the performance of the silencer 19. Therefore, during normal operation in which only the engine 10 is operated, exhaust noise and pressure loss at the outlet of the exhaust silencer 19 can be made smaller than before, which is preferable. .

[When Three Engines are Installed] FIG. 2 is a block diagram showing an exhaust path when three engines are installed at the pumping station. As shown in the figure, in this embodiment, the primary engine 20 and the secondary engine 20 are
The following exhaust silencers 27-1 and 29-1 are connected in series by the exhaust pipe 24, while the second and third engine 21,
23 to the primary exhaust silencers 27-2 and 27
-3 is connected by the exhaust pipe 24, and then the exhaust pipe 24 is set to 1
The exhaust pipes 2 of the two secondary exhaust silencers 29-1 and 29-2 are connected together by connecting them to the secondary exhaust silencer 29-2.
The four exhaust mufflers 31 are connected to each other by assembling four. In other words, the secondary exhaust silencer 29-2 has two engine 2
1, 23 are shared as one unit, and the third exhaust silencer 31 is shared as one unit for the three engines 20, 21, 23. The engines 20, 21, 23 in this embodiment are also installed at the pumping station, the first engine 20 is a pump driving engine used during normal pump operation, and the second engine 21 is, for example, The pump driving engine is used temporarily when the amount of drainage is large, and the third engine 23 is a pump driving engine which is temporarily used when the amount of drainage is large.

For example, when only the engine 20 is operated during normal operation, the exhaust noise is gradually increased by the primary, secondary, and tertiary exhaust silencers 27-1, 29-1, 31 connected thereto. The sound is reduced.

When the operation of the engine 21 is started because the drainage cannot be made in time by the operation of only one engine 20, that is, when the two engines 20, 21 are operated at the same time, the primary and secondary connected respectively. Exhaust silencer 27-
After the exhaust noises of both of them are gradually reduced by 1, 29-1, 27-2, 29-2, one third exhaust silencer 31
The exhaust sound of both is further reduced and exhausted.

Even if the operation of the engine 23 is started because the drainage is not in time by the operation of the two engines 20, 21 only, that is, all the three engines 20, 21, 23 are operated at the same time, the exhaust muffling is performed. 27-1, 27-2,
27-3, 29-1, 29-2, and 31 reduce the exhaust noises in stages, and the exhaust noises are exhausted.

Also in the case of this embodiment, the number of exhaust silencers is reduced as in the case of the above-mentioned embodiment, so that the installation space can be reduced and the cost of parts can be reduced.
When a larger silencer is installed as the secondary exhaust silencer 29-2 or the tertiary exhaust silencer 21, and only one engine 20 or two engines 20, 21 are operated and not all are operated. The exhaust noise and pressure loss at the outlet of the exhaust silencer 31 can be made smaller than in the conventional case.

The third engine 23 can also be constructed as an emergency engine when the other engines 20, 21 fail. Even in such a case, since the engine 23 is rarely used, the effect of reducing the silencer is great.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications are possible within the scope of the claims and the technical idea described in the specification and drawings. Can be modified. Note that any shape, structure, or material not directly described in the specification and drawings is within the scope of the technical idea of the present invention as long as the functions and effects of the present invention are exhibited. For example, in the above-described embodiment, the case where the number of engines is two or three has been described, but the present invention can be applied to the case of four or more engines. There are also 2 exhaust silencers
Only the next or four or more may be installed. The point is that the exhaust silencer of any one of the secondary and subsequent exhaust silencers may be shared by a plurality of engines. Further, in the above-described embodiment, an example in which a plurality of engines have a driving priority, or one of the engines is used as an emergency engine has been shown, but all the engines may be used in normal operation or may be replaced. It goes without saying that the present invention can be applied to the case where it is used.

[0021]

As described in detail above, the present invention has the following excellent effects. It is possible to reduce the number of exhaust silencers that are rarely used, reduce the size of the building that houses various mechanical equipment, and reduce the construction cost.

If there is an engine that is not operated during normal operation by using a plurality of engines with priorities for operation or by using one of the engines as an engine for emergency operation, share it during normal operation. There is a margin in the performance of the existing exhaust silencer, noise can be reduced more effectively than before, and exhaust pressure loss can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing an exhaust path when two engines are installed at a pumping station.

FIG. 2 is a block diagram showing an exhaust path when three engines are installed in a pumping station.

FIG. 3 is a block diagram showing a conventional exhaust path when two engines are installed at a pumping station.

[Explanation of symbols]

10,11 engine 13 Exhaust pipe 15-1, 15-2 Primary exhaust silencer 17-1, 17-2 Secondary exhaust silencer 19 Third exhaust silencer 20,21,23 engine 24 exhaust pipe 27-1, 27-2, 27-3 Primary exhaust silencer 29-1, 29-2 Secondary exhaust silencer 31 3rd exhaust silencer

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takayuki Ishiwata             11-1 Haneda Asahi-cho, Ota-ku, Tokyo Co., Ltd.             Inside the EBARA CORPORATION (72) Inventor Kazuyuki Kawahara             11-1 Haneda Asahi-cho, Ota-ku, Tokyo Co., Ltd.             Inside the EBARA CORPORATION F-term (reference) 3G004 AA06 BA00 BA01 BA09 DA01                       DA06

Claims (3)

[Claims] 1. An exhaust silencer having a structure in which exhaust gases emitted from a plurality of engines are silenced by a plurality of exhaust silencers connected in series, wherein a secondary exhaust silencer of the plurality of exhaust silencers is used. An exhaust silencer in which any one of the following exhaust silencers is shared by a plurality of engines. 2. The engine includes two engines, a first engine and a second engine.
The primary and secondary exhaust silencers are connected in series to the first engine, respectively, and the tertiary exhaust silencer is shared by the two engines as one unit. Exhaust silencer. 3. The number of engines is three, exhaust silencers up to the second are connected in series to the first engine, and one to each of the second and third engines. After connecting the next exhaust silencer, connect the secondary exhaust silencer so that it shares one unit, and further share the third exhaust silencer with the two secondary exhaust silencers. The exhaust silencer according to claim 1, wherein the exhaust silencer is connected as follows.