JPS62162771A - Dynamo-diesel engine starter - Google Patents

Abstract

PURPOSE:To enable reliability of start-up of a diesel engine subsequently power generation therefrom to be maintained at low cost by laying the first, second and third opening/closing valves, the third pipe line and the like on an existing equipment. CONSTITUTION:In the case of any failure on the first air reservoir 7, the first opening/closing valve 25 is closed, and the second and the third opening/closing valves 25', 24 are opened. As the result, the cylinder of the first diesel engine and the second air reservoir 7' are communicatingly connected to each other through the first pipe line 8, the third pipe line 23 and the second pipe line 8' in order to do start-up of the first diesel engine 2 by means of compressed air supplied from the second air reservoir 7'. Contrarily, in the case of any failure on the second air reservoir 7', start-up of the second diesel engine 2' is similarly carried out by means of compressed air supplied from the first air reservoir 7. By the above mechanism, the communicatingly connected state of the cylinder of a diesel engine and an air reservoir can be swiftly and easily switched by operation of an opening/closing valve.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a starting device for a diesel engine for power generation, which is suitable for use in a power generation membrane (fil, etc.) of a nuclear power plant.

[Conventional technology]

In general, in the power generation equipment of nuclear power plants, etc., where reliability of power generation is highly required, the power generation washing room 1 is equipped with two
It is divided into two compartments A and B, and in each compartment A and B there is a diesel engine 2 and a coupling 4 connected to the diesel engine Isoseki 2.
A generator 3 is provided which is driven via a generator 3 to generate electricity.

The power generation tels D in each section A and B are provided independently, so that if one power generation device fails, the other power generation device is used.

In addition, each diesel engine 2 has a compression tF15 l distribution.
6. Start-up 5 consisting of air reservoir 7 and piping 8! ;A place is provided.

Fig. 2 shows an example of a starting device equipped with two air reservoirs 7 for one diesel engine 2. To explain the first conventional example of a starting device for a diesel engine for power generation equipped with a damper 7, the third
As shown in FIG. 1
1 through a pipe 8 having an opening/closing valve 9 interposed therebetween.

The compressors 8!5 are driven and operated from the machine board 13 via the control panel 14. In addition, pressure switches 19u and 19b connected to the air reservoir 7 and activated according to the pressure within the air reservoir 7 are connected to the control panel 14 via signals @20 and 20, and the compression fi5 is connected to the air reservoir 7. It is automatically controlled by the control panel 14 according to the signals from the pressure inlets 19a and 19b so as to maintain the pressure within the predetermined pressure range.
6 to supply air into the air reservoir 7.

The opening/closing source 9.9 is driven to open and close from the machine board 13 via the signal line 20 and the control panel 14, and is normally in a closed state, but is operated so as to be in an open state when the diesel engine 2 is started. Ru.

In FIG. 3, reference numeral 10 is a starting valve connected to the pipe 8 and for injecting compressed air into the air t111 when the diesel engine 2 starts n5, 12 is a piston in the cylinder 11, and 15 is an air reservoir 7. 16 is a safety valve of the air reservoir 7, 21 is a drain pit, and 19c is a pressure switch. 8, and is activated when the compressed air for starting passing through the pipe 8 falls below a predetermined pressure, and the signal line 2
Alarm number IJ is sent to the machining board 13 via o.

With the above configuration, the pressure in the air reservoir 7 is maintained within the pressure range of the minimum working pressure P and the maximum working pressure P2 in order to supply the cylinder 11 with the amount of air necessary to start the diesel engine 2. .

That is, when the pressure in the air reservoir 7 reaches P, the pressure switch 19b is activated and a signal is output via the signal m20.
Sent to board 14. Then, in response to the same signal, the control panel 1
4 operates the compressor 5, and the compressor 5 supplies air into the air reservoir 7 via the pipe 6.

When the pressure in the air reservoir 7 reaches P2 due to air supply, the pressure switch 19a is activated, and a signal is sent to the control panel 14 via the signal line 20. In response to the signal, the control panel 14 starts the operation of the compressor 5. make it stop.

In this way, the compressor 5 has a pressure switch 19a.

19b starts and stops, and the air reservoir 7
The pressure inside is always maintained within the range of P and P2.

Note that the drain valve 15 is normally closed, and the air reservoir 7
In addition to being opened when draining the drain from the drain pipe 22 to the drain bit 21, the main valve 18 is normally open and is closed when performing maintenance such as draining the air reservoir 7.

In addition, a safety valve 1G is installed to prevent damage to the air reservoir 7 when the compressor 5 does not stop operating even if the pressure inside the air reservoir 7 exceeds P2 due to a malfunction of the pressure switch 19a, etc.
is automatically opened.

By the way, when starting the diesel engine 2, the signal line 20 is connected from the control panel 14 by operating the operation panel 13.
An opening operation signal is sent to the opening/closing source tF9 via. This results in
The opening/closing source valve 9 changes from the closed state to the open state, and compressed air flows from the air reservoir 7 where the pressure has been accumulated like a double series into the air f211 through the piping 8 and the starting valve 10, and the open air I2111.
Lower the piston 12 in 1 to diesel 8! 1 Seki 2
start.

Note that the starting valve 10 is designed to prevent the compressed gas in the cylinder 11 from flowing back into the pipe 8 during the compression stroke in the AAffJ11.

Next, referring to FIG. 4, a description will be given of a second conventional example of a starting device for a diesel engine for power generation, which is provided with two air reservoirs 7 for one diesel engine 2.As shown in FIG. This second conventional example is also configured almost the same as the conventional example l, but in the conventional example f:IS2, the piping 6
and 8 are each branched into two, and a pair of air reservoirs 7.7 are connected to the pipe 6 and upstream 8 in parallel. Each air reservoir 7 is connected to a vent pipe 22, which is VC-connected via a vent valve 15, similar to the device shown in Figure tpJ3. safety valve 1
6° pressure switches 19a, 19b, etc. are attached.

” Due to the dual configuration, the starting device of this second conventional example etc.
In addition to functioning in exactly the same way as the conventional example of 1, the air reservoir 7 is
Since it is provided separately, a large amount of compressed air can be stored, and the diesel engine 2 can be started quickly and reliably.

[Problem that the invention seeks to solve]

However, in both the first and second conventional examples, in the conventional starting device for a diesel engine for power generation as described above, if a failure occurs in the compression 8!5 or the air reservoir 7, the diesel engine 2 cannot be started. At times, compressed air at a predetermined pressure cannot be supplied to the cylinder 11 of the diesel engine 2, making it impossible to start the diesel engine 2.

By the way, since reliability of power generation is absolutely required for the power generation membrane 4a of a nuclear power plant, as shown in Figure i2, 211 power generation equipment is generally provided, but this is not a diesel engine. This is to deal with large-scale equipment failures or maintenance of the diesel engine 2 and generator 3, and due to a failure of the starting device, power generation by one diesel engine 2 and generator 3 changes from power generation to the other. Switching requires extremely large-scale operations and time, and greatly impairs the reliability of power generation.

Therefore, in order to deal with the failure of the starting device, each diesel engine
It is possible to attach multiple starting devices to the iI5iI2, consisting of an air reservoir 71 compression 8!5, etc., but in general,
Due to reasons such as noise and vibration, power generation equipment is often installed in narrow spaces under adverse conditions such as basements.
As shown in FIG. 2, the sections Δ and B as the above spaces
Inside, a tank 27 for storing fuel, lubricating oil, cooling water, etc. for the diesel engine 2, stairs 28, etc. are also arranged, so it is not possible to provide multiple starters in compartments Δ and B. This is difficult in terms of space and unfavorable in terms of cost.

Furthermore, in the second conventional example shown in Fig. fi4, when one of the air reservoirs 7 fails, the failed air reservoir 7 is
Genben 18 or Hai? ? 8 (close the till valve and isolate it,
It is also conceivable to start the diesel engine 2 using only the other air reservoir 7. However, in this case, the function of the second conventional example of starting the diesel engine 2 reliably in a short time is impaired, and the closing operation of the main valve 18 etc. must be performed manually. There is also a point where the response to this problem will be delayed.

The present invention attempts to solve the above-mentioned problems, and is aimed at starting either of the two diesel engines using a starting device attached to each diesel engine at a power generating membrane end having two diesel engines. - enables immediate and easy switching to the other starting device in the event of failure of one power starting device, ensuring reliable diesel engine starting, reducing costs and making efficient use of space; Another object of the present invention is to provide a starting device for a diesel engine for power generation.

[Means for solving problems]

For this reason, the starting device for a diesel engine for power generation according to the present invention has the first and second diesel engines 8! installed to drive the generator. Each of the leapers is provided with a first upper air reservoir and a second air reservoir for starting, and a first pipe connecting the cylinder of the first diesel engine and the first air reservoir; A first opening/closing source valve and a first opening/closing valve of tjS2 are provided in the second piping connecting the negative air 9 (9) of the diesel engine and the second air reservoir, respectively, and the f!S1 in the first piping is A third pipe connecting the branch part and the second branch part of the second pipe is provided between the air reservoir of the tpJ1 and the branch part of the tfS1. a first on-off valve installed in the piping;
f: a second on-off valve interposed in the piping of tjS2 between the air reservoir of tS2 and the branch of PJ2; and a third on-off valve interposed in the third piping. It is characterized by the fact that

[For production]

In the above-mentioned starting device for a power generation diesel engine of the present invention,
If a failure occurs in the air reservoir of tjSl, by closing the first on-off operation valve and opening the second and V-third on-off operation valves, the Air reservoir is fjSl piping, third piping and fiS2
The first diesel engine is started by compressed air supplied from the second air reservoir.

On the other hand, if a failure occurs in the second air reservoir, the second on-off valve should be turned on! 7I frequently, IJIJ11 of the above 2nd and above Pt53! ] By releasing the operating valve by one step, the cylinder of the second diesel engine and the first air reservoir are connected to the piping of PjS2, the third piping and the first air reservoir.
The second diesel engine is started by compressed air supplied from the air tank tjIJ1.

〔Example〕

Hereinafter, a starting device for a power generation diesel engine as an embodiment of the present invention will be explained with reference to the drawings. Fig. 1 is a schematic piping diagram thereof, and as shown in the figure The structure is almost the same as the conventional example (see Fig. 3), and the inside of the generator room 1 is divided into two compartments A and I3.
To these compartments and into B, respectively, the first and second diesel 8! Seki 2, 2' and a power generation rock (No. 2 3 in Fig. 2) which is driven by the same diesel engine 2, 2' via a coupling (see numeral 4 in Fig. 2) to generate electricity.
) are provided.

First and second air reservoirs 7, 7'' for starting are installed in the diesel engines 11 and 2, respectively.
A compression valve 5.5 is connected to these air reservoirs 7 and 7'' via piping 6.6 which is equipped with a main valve 18.18 and a check valve 17.17, respectively. At the same time, air reservoir 7゜7' and diesel filI12
．． 2' are connected to the tubes 11, 11 by first and second pipes 8.8'', respectively,
Furthermore, these first and twelfth pipes 8, 8' are
Opening/closing source valves 9.9' and 11 and fi2 are interposed, respectively.

In each section Δ, B, the compressor 5 is driven and operated from an operation panel 13 via a control panel 14. In addition, pressure switches 19m and 19b are connected to the air reservoir 7 (or 7') and operate according to the pressure within the air reservoir 7 (or 7'').
It is connected to the control panel 14 via the signal @20.20,
Compression 8!5 is operated by pressure switch 19a+ to maintain the pressure in air reservoir 7 (or 7') within a predetermined pressure range.
It is automatically controlled by the control panel 14 in response to the signal from the terminal 19b, and air is supplied from the arrangement i7G into the air reservoir 7 (or 7').

In addition, the opening/closing source valves 9 and 9' are driven to open and close from the operation panel 13 via the A3 line 20 and the control #114 in sections ΔI3 and B, respectively, and are normally open, but the diesel engine 2 and 2' are driven so as to be in the open state when starting.

) js The first and second pipes 8 and 8' each have 1
1 and a second branch part 8a, 8a' are formed, and a third pipe 23 penetrating the partition wall 1a in the generator room 1 connects the branch parts 8a, 8a' with each other. It is connected in communication.

Then, in the ward 1ilA, the first air reservoir 7 and the first
A first opening/closing operation 1j25 is interposed in the first piping 8 between the branch part 8a of the
In the second pipe 8' between the air reservoir 7'' of jS2 and the branch part 8m' of I\S2, there is a 1'' closing valve 25 of ptS2.
' are interposed, and these opening/closing valves 25 and 25' are driven to open and close from the operation panel 13 via the signal @ 20 and the control panel 14 in the compartments A and 13, respectively.
Usually open.

Also, in the compartment! 53 piping 23 has a third 1
IrJI7I operating valve 24 is installed, and the same open operation valve J valve 24 is installed! Line 20 and control t111'! i!
It is driven to open and close from the operation panel 13 via 14, and is normally closed.

Furthermore, the operation panels 13, 13 to and from the compartments are electrically connected to each other by a signal IQ2G.

In this embodiment, the third on-off valve 24 is provided on the section A side, but it may be provided on the section B side.

In Fig. 3, reference numeral 10 is a starting valve that is connected to pipe 8 (or 8') and injects compressed air into cylinder 1 when starting diesel engine 2 (or 2'). , 12 is a piston in the cylinder 11, 15 is a drain well installed in the drain pipe 22 of the air reservoir 7 (or 7'), 16
10 shows the air reservoir 7 (or 7'), 21 shows the drain bit, and 19c shows the pressure switch. Pressure switch 19
c is connected to piping 8 (or 8'') and is activated when the starting compressed air passing through piping 8 (or ε3') falls below a predetermined pressure, and is sent to the operation panel 1 via signal #a20.
Alert No. 11 will be sent to 3.

The beginning of a power generation diesel engine as an embodiment of the present invention!
Since the l1lJ device is configured as described above, during normal power generation, the power generation F of either section A or B is
& 4Al generates electricity. The diesel engine 2 (or 2') is started using compressed air from the air reservoir 7 (or 7') in exactly the same manner as in the prior art.

At this time, the on-off valve 25 (or 25'') in the arrangement (or 8') is opened, and the third on-off valve 24 in the third pipe 23 is closed.

By the way, in this embodiment, since the operation panels 13.13 in sections Δ and B are electrically connected to each other by y#i26, it is possible to connect the operation panels 13 in either section Δ or B to the other section. The starting device in iIB or A can be operated.

Therefore, in the ward uiA the first diesel fiV
When starting the iJ2, in the unlikely event that the first air reservoir 7 in the compartment fails, the diesel engine 8! If it becomes impossible to start the ttSi connected to the tjSl piping 8, by pushing the operation panel 13 into the compartment, a control signal is sent via the control panel 14 and No. 43 m20, and the ttSi installed in the tjSl piping 8 is While closing the on-off operation valve 25 of the ill
The third on-off valve 24 installed in the pipe 23 of '3 is opened.

Thereby, the cylinder 11 of the diesel engine 2 of fISl in the compartment is connected to the first pipe 8. It is connected to the air reservoir 7' of tjS2 in section i1B via the third pipe 23 and the second pipe 8'.

Then, by sending a control signal from the rubbing board 13 in section IIA to the operation panel 13 in section 1iIB via the signal line 26, the compressor 5 in section B is driven, and the 152 air reservoirs are operated in the same manner as before. Compressed air is now supplied from 7' to the air f:111 of the first diesel engine 2, and the diesel engine 2 at f51 in section A can be started without any trouble.

Conversely, when starting the second diesel engine 2' in section B, if a failure occurs in the air reservoir 7' of f52 in section B, operation J! in section B should be performed. i! 1
3, close the second on-off valve 25' and open the third on-off valve 24, and open the second diesel engine 2' in section B. The first air reservoir 7 in section A is connected to the second air reservoir 7 in section A. ? 8', 3rd
The first piping 23 and the first piping 8 communicate with each other.

As a result, conversely to the above case, fjS in section B
Two diesel engines 2' can be started by compressed air supplied to the first air reservoir 7C) in the compartment.

On the other hand, in the unlikely event that the compressor 5 in the compartment breaks down, the district +1! When accumulating pressure in the air reservoir 7 of 1jS1 in IiA, by operating the operation panel 13 in section A, a control signal is sent via the control panel 14 and signal line 20 to open the third opening/closing valve 24. do.

Then, by sending a control signal 81 from the operation panel 13 in the compartment to the operation #113 in compartment B via the signal line 2G, the compressor 5 in compartment B is driven, and the second air is While air is being supplied to the reservoir 7', air is also supplied to the first air reservoir 7 in section A via the second piping 8', the piping 23 of fjS3, and the first piping 8, and the accumulated pressure is increased. It is done.

Note that if the compressor 5 in section B breaks down, the same procedure as described above will be applied to section iI! With a compression of 8!5 in iA, pressure accumulation in the second air reservoir 7' in compartment B can be carried out.

As described above, according to this embodiment, two sets of power generation equipment, which were conventionally installed independently, are connected by the third pipe 23S and the signal line 2G, so that any of the power generation equipment in section A or B can be It is now possible to start the diesel engine 2 or 2' in section B or A of the pond power even if the starting device is used, so if either starting device fails, the Kaida operating valve 25. By closing the IJi of ' and 24, switching to the other starting device can be performed immediately and easily, and the reliability of starting the diesel FII3Q2 or 2' and, in turn, the reliability of power generation can be fully ensured. .

In addition, it is not necessary to provide a limited number of starting devices in each section Δ or B, and the third piping 23 is added to the existing equipment.
．． Since it is only necessary to provide the signal 12G and the opening/closing valve 24°25.25', there is an advantage that the equipment cost can be reduced and the space in the generator room 1 can be used effectively.

In addition, in this embodiment, 1'! to one diesel engine! ! 2(
Regarding the starting device in which one air reservoir 7 (or 7') is attached to each air tank 7 (or 2'):
As a second conventional example, the starting device shown in Fig. 4 has two air reservoirs attached to one diesel engine.
It can be applied in the same way as above. In this case, the function of starting the diesel engine in a short time and reliably due to the presence of two air reservoirs will not be impaired as in the past.

〔Effect of the invention〕

As described in detail above, according to the starting device for a power generation diesel engine of the present invention, the first
and V for each of the second diesel engines for starting.
and a second air reservoir, and the first diesel 8! A first pipe is connected to a piping connecting the flash cylinder and the first air reservoir, and a second pipe connecting the twelve cylinders of the diesel engine to the second air reservoir, respectively. A third pipe is provided, which is provided with an rT1 jump valve and a second opening/closing valve, and connects the first branch part in the first pipe and the tjS2 branch part in the second pipe, and A first llIrX1 interposed in the ml pipe between the @1 air reservoir and the first branch part.
an operating valve, a second lJIIm interposed in the piping of the ff12 between the second air reservoir and the second branch section;
an operating valve and a third rf interposed in the piping of the PIS3
With a simple configuration in which an R-operated valve is provided, the communication connection state between the first and second diesel engine cylinders and the first and second air reservoirs can be instantly determined by interleaving and closing the open-m operation valve. Since the switching can be made easily, the reliability of starting the diesel engine and the reliability of power generation can be sufficiently ensured.

Also, ml in existing equipment,! Just by installing R2 and fjS3 open field operation valves and Pt53 arrangement 17, etc.
Since the device of the present invention can be manufactured, reliability of power generation can be ensured at low cost, and there is also the advantage that space within the generator room can be used effectively.

[Brief explanation of drawings]

Figure 1 is a schematic piping diagram showing the starting device of a power generating diesel engine as an embodiment of the present invention, and Figure F52 is a schematic piping diagram showing the arrangement of general power generation equipment in nuclear power plants etc. It is a plan view, FIG. 3 is a schematic piping diagram showing the starting V and position of a power generation diesel engine as a first conventional example, and FIG. 4 is a diagram of a power generation diesel engine as a conventional example of PtrJ2. It is a typical piping diagram showing a starting device. 1... Generator room, 1u... Bulkhead, 2... First diesel 8! Flash, 2'...Second diesel engine, 5...Compressor, 6...Piping, 7...First air reservoir, 7'...
12 air reservoir, 8...first piping, 8a...first branch, 8'...second piping, 8a'...second branch, 9...first opening/closing source valve , 9'...Second opening/closing valve, 1
0...Starting valve, 11...Ki CL12...Piston, 13
・・Processing board, 14・・Control panel, 15・・Drain valve, 16
... Safety 17. Check valve, 18. Main valve, 19. J
, 19b, 19c...pressure switch/chi, 20...signal line,
21...Drain focus, 22...V drain tube, 23...f
ln3 piping, 24... 3rd opening/closing fya! I! l+valve,
25...First on-off operation valve, 25'...Second on-off operation valve, 26..Signal line, 8.B..Division in the power generation rock chamber. Sub-Agent Patent Attorney A Hiko Iinuma Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] First and second diesel engines installed to drive the generator are each provided with first and second air reservoirs for starting, and the cylinders of the first diesel engine and the first air reservoir are provided. and a second pipe connecting the cylinder of the second diesel engine and the second air reservoir, a first opening/closing valve and a second opening/closing valve, respectively. A third pipe is provided to connect a first branch part of the first pipe and a second branch part of the second pipe, and a third pipe is provided to connect the first branch part of the first pipe and the second branch part of the second pipe. A first on-off valve interposed in the first pipe between the branch part and a first on-off valve interposed in the second pipe between the second air reservoir and the second branch part. 1. A starting device for a diesel engine for power generation, characterized in that a second on-off valve is provided, and a third on-off valve is interposed in the third pipe.