JP2020118066A - Air supply system for starting up internal combustion engine and pump facility - Google Patents

Abstract

To provide an air supply system for starting up an internal combustion engine and a pump facility capable of preventing in advance, a defective start-up of the internal combustion engine.SOLUTION: An air supply system for starting up an internal combustion engine 50 comprises: an air tank 8 to supply start-up air to the internal combustion engine 4; an air compressor 23 which fills the air tank 8 with the start-up air; a pressure gauge 8a which measures pressure levels in the air tank 8 including at least a high-pressure level and a low-pressure level; and a control device 100 which drives the air compressor 23 on the basis of a measurement result of the pressure gauge 8a. The control device 100 measures a number of start-ups of the internal combustion engine 4 while the pressure level in the air tank 8 is reduced from the high-pressure level to the low-pressure level and detects abnormality of the system on the basis of the number of start-ups.SELECTED DRAWING: Figure 3

Description

The present invention relates to an air supply system for starting an internal combustion engine and pump equipment.

The following Patent Document 1 discloses a pump facility equipped with a pump driven by an internal combustion engine and operated for the purpose of controlling flooding in heavy rain or the like. In such a pump facility, reliable operation is required in the event of a flood, and in order to confirm the soundness of the entire facility, it is essential to carry out a controlled operation of the main pump and auxiliary equipment. In particular, a starting failure of the internal combustion engine that drives the main pump leads to a decrease in reliability, and therefore it is necessary to detect an abnormality early and restore the function by maintenance or repair. Therefore, the normal operation of the starting air system equipment (internal combustion engine starting air supply system) that supplies the starting air to the internal combustion engine is an important factor for operating the main pump properly at an appropriate time.

JP 2012-246865 A

By the way, the air supply system for starting an internal combustion engine has a wide variety including an air compressor, an air tank, a control device, and various air pipes/valves. , Equipment, and the system including these devices and equipment must be inspected, which may take a fatal time at a drainage pump station that requires early restoration. The causes of abnormalities in the air supply system for starting the internal combustion engine include the failure of the air compressor, the sticking of various valves (check valves, etc.) in the system, the air leakage from the system, and the failure of the control device. However, it was difficult to make a visual judgment. Therefore, the system abnormality is often found at the timing when the internal combustion engine startup failure occurs, and it is difficult to prevent the internal combustion engine startup failure.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an air supply system for starting an internal combustion engine and a pump facility capable of preventing a starting failure of the internal combustion engine.

(1) An internal combustion engine starting air supply system according to one aspect of the present invention includes an air tank for supplying starting air to an internal combustion engine, an air compressor for filling the air tank with the starting air, and Among the pressure levels of the air tank, a pressure gauge that measures at least a high level and a low level, and a control device that drives the air compressor based on the measurement result of the pressure gauge, the internal combustion engine starting air In the supply system, the control device measures the number of times the internal combustion engine is started while the pressure level of the air tank is lowered from the high level to the low level, and based on the number of starts, Detect system abnormality.

(2) In the air supply system for starting an internal combustion engine according to (1) above, the control device compares the number of starts with a preset reference number of starts to detect an abnormality in the system. May be.

(3) The internal combustion engine starting air supply system according to (1) or (2), wherein a plurality of the internal combustion engines are installed, and the air tank and the pressure gauge are provided for each internal combustion engine. The controller may measure the number of times of starting for each of the starting air supply systems and compare the numbers of starting times to detect an abnormality of the system.

(4) The internal combustion engine starting air supply system according to any one of (1) to (3), wherein an air pipe for transferring the starting air from the air tank toward the internal combustion engine, and the air pipe. An opening/closing device for opening/closing the air conditioner, wherein the control device further measures a cumulative time during which the opening/closing device opens the air pipe while the pressure level of the air tank decreases from the high level to the low level. At the same time, the system abnormality may be detected based on the accumulated time.

(5) An internal combustion engine starting air supply system according to an aspect of the present invention includes an air tank for supplying starting air to the internal combustion engine, an air compressor for filling the air tank with the starting air, and Among the pressure levels of the air tank, a pressure gauge that measures at least a high level and a low level, and a control device that drives the air compressor based on the measurement result of the pressure gauge, the internal combustion engine starting air A supply system, comprising air piping for transferring the starting air from the air tank toward the internal combustion engine, and an opening/closing device for opening/closing the air piping, wherein the control device is a pressure of the air tank. While the level is decreasing from the high level to the low level, a cumulative time that the switchgear opens the air pipe is measured, and an abnormality of the system is detected based on the cumulative time.

(6) In the internal combustion engine starting air supply system according to (4) or (5), the control device compares the accumulated time with a preset reference accumulated time, Abnormality may be detected.

(7) The internal combustion engine starting air supply system according to (6), further including a thermometer for measuring an air temperature, wherein the control device is based on a measurement result of the thermometer, and the reference cumulative time. May be corrected.

(8) The internal combustion engine starting air supply system according to any one of (4) to (7), wherein a plurality of the internal combustion engines are installed, and the air tank and the pressure gauge are provided for each internal combustion engine. , The air pipe, comprising a starting air supply system including the opening and closing device, the control device, while measuring the cumulative time for each of the starting air supply system, by comparing the cumulative time, the system Abnormality may be detected.

(9) In the air supply system for starting the internal combustion engine according to (1) to (8), the control device further drives the air compressor, and the pressure level of the air tank is at the low level. The pressure rise time from the level to the high level may be measured, and the system abnormality may be detected based on the pressure rise time.

(10) An internal combustion engine starting air supply system according to an aspect of the present invention includes an air tank for supplying starting air to an internal combustion engine, an air compressor for filling the starting air with the air tank, Among the pressure levels of the air tank, a pressure gauge that measures at least a high level and a low level, and a control device that drives the air compressor based on the measurement result of the pressure gauge, the internal combustion engine starting air In the supply system, the control device drives the air compressor to measure a pressure rise time until the pressure level of the air tank changes from the low level to the high level, and at the pressure rise time. Based on this, the system abnormality is detected.

(11) In the internal combustion engine starting air supply system according to (9) or (10), the control device compares the pressure increase time with a preset reference pressure increase time, A system abnormality may be detected.

(12) The air supply system for starting an internal combustion engine according to any one of (9) to (11), comprising a plurality of the air compressors, wherein the control device has the pressure increase time for each of the air compressors. May be measured and the pressure rise times may be compared with each other to detect a system abnormality.

(13) The internal combustion engine starting air supply system according to any one of (9) to (12), wherein a plurality of the internal combustion engines are installed, and each of the internal combustion engines includes the air tank and the pressure gauge. And a switching device for switching the connection with the air compressor to any one of the starting air supply system, wherein the control device is the starting air supply system. The pressure rise time may be measured for each time, and the pressure rise times may be compared with each other to detect a system abnormality.

(14) The internal combustion engine starting air supply system according to (9) to (12), wherein a plurality of the internal combustion engines are installed, and the air tank and the pressure gauge are provided for each internal combustion engine. Including a starting air supply system, each of the starting air supply system is connected to the air compressor, the controller drives the air compressor, the starting air supply system of In all, the total pressure increase time from the low level to the high level of the pressure level of the air tank is measured, and the abnormality of the system may be detected based on the total pressure increase time.

(15) A pump facility according to an aspect of the present invention supplies a pump for pumping a liquid, an internal combustion engine for driving the pump, and a starting air for starting the internal combustion engine (1) to (14). And the described air supply system for starting an internal combustion engine.

According to the above aspect of the present invention, it is possible to provide an air supply system for starting an internal combustion engine and pump equipment capable of preventing a poor start of the internal combustion engine.

It is a whole block diagram of the pumping station 1 which concerns on 1st Embodiment. It is a schematic block diagram of the main pump 10 which concerns on 1st Embodiment. It is a schematic structure figure of an internal-combustion-engine starting air supply system 50 concerning a 1st embodiment. It is a figure which shows an example of the detection method of the abnormality of the internal combustion engine starting air supply system 50 which concerns on 1st Embodiment. It is a graph which shows the relationship between the pressure of the air tank 8 which concerns on 2nd Embodiment, and the time which opened the starting valve 50b. It is a figure which shows an example of the detection method of the abnormality of the internal combustion engine starting air supply system 50 which concerns on 2nd Embodiment. It is a graph which shows the relationship between the pressure of the air tank 8 which concerns on the modification of 2nd Embodiment, and the time when the starting valve 50b was opened. It is a control flow by the control apparatus 100 which concerns on 3rd Embodiment. It is a control flow by the control apparatus 100 which concerns on 3rd Embodiment. It is a figure which shows an example of the setting method of the reference pressure rise time (when there is one internal combustion engine 4 (main pump 10)) according to the third embodiment. It is a figure which shows an example of the setting method (when there are multiple internal combustion engines 4 (main pump 10)) of the reference pressure rise time which concerns on 3rd Embodiment. It is explanatory drawing for demonstrating the calculation method of the setting method (when there are multiple internal combustion engines 4 (main pump 10)) of the reference pressure rise time which concerns on 3rd Embodiment. It is explanatory drawing for demonstrating the calculation method of the setting method (when there are multiple internal combustion engines 4 (main pump 10)) of the reference pressure rise time which concerns on 3rd Embodiment. It is a schematic block diagram of the internal combustion engine starting air supply system 50 which concerns on the modification of 3rd Embodiment. It is a control flow by the control apparatus 100 which concerns on 4th Embodiment. It is a control flow by the control apparatus 100 which concerns on 5th Embodiment. It is a control flow by the control apparatus 100 which concerns on 6th Embodiment.

Hereinafter, an internal combustion engine starting air supply system and pump equipment according to an embodiment of the present invention will be described with reference to the drawings. In the following description, as an application example of the present invention, a pumping station operating for the purpose of controlling flooding in heavy rain or the like will be exemplified.

(First embodiment)
FIG. 1 is an overall configuration diagram of a pumping station 1 according to the first embodiment.
The pumping station 1 (pump equipment) shown in FIG. 1 includes a plurality of main pumps 10 (pumps) and a plurality of auxiliary machines 20 that operate the main pumps 10. The pumping station 1 includes four horizontal axis pumps as the main pump 10. The main pump 10 may be a vertical axis pump.

The pumping station 1 includes, as the auxiliary machine 20, a vacuum pump 21, a gear pump 22, an air compressor 23 (compressor), a cooling water pump 24, and the like. The air compressor 23 is a component of the internal combustion engine starting air supply system 50 that starts the internal combustion engine 4 that is the drive unit of the main pump 10. Two of these auxiliary machines 20 are installed, respectively, and one of the two machines can be a spare machine.

FIG. 2 is a schematic configuration diagram of the main pump 10 according to the first embodiment.
As shown in FIG. 2, the main pump 10 includes a casing 11 having a suction port 11 a opening to the suction water tank 2 and a discharge port 11 b opening to the discharge water tank 3. The suction water tank 2 and the discharge water tank 3 are provided with water level gauges 2a and 3a for measuring the water levels on the suction side and the discharge side, respectively. A pump shaft 12 extending in the lateral direction (horizontal direction) is inserted in the casing 11. An impeller (impeller) (not shown) is connected to the pump shaft 12. A discharge valve 13 is provided on the downstream side of the impeller and the upstream side of the discharge port 11b.

The main pump 10 is driven by the internal combustion engine 4. The internal combustion engine 4 is, for example, a diesel engine started by an air motor or the like. The drive shaft 4a of the internal combustion engine 4 is connected to the speed reducer 5, and the speed reducer 5 is connected to the pump shaft 12 of the main pump 10. By driving the internal combustion engine 4, the pump shaft 12 rotates via the speed reducer 5, the water in the suction water tank 2 is pumped by the main pump 10, and the water is discharged to the discharge water tank 3. ing.

The vacuum pump 21 sucks air in the casing 11 when the main pump 10 is activated, and fills the casing 11 with priming water. The vacuum pump 21 is connected to the casing 11 via an intake line 30 (intake pipe). The intake line 30 is provided with a full-water detector 14 for detecting fullness of priming water in the casing 11, and an intake valve 31 (motorized valve or electromagnetic valve) for opening/closing the intake line 30.

The vacuum pump 21 is driven by the electric motor 21a. The vacuum pump 21 is, for example, a water-sealing type (specifically, Nash type) vacuum pump, and as shown in FIG. 1, a water supply pipe 32 for supplying makeup water is connected to the intake side thereof, and an exhaust side thereof. A discharge pipe 33 for discharging the supplied water and the sucked air is connected to the. The water supply pipe 32 is connected to the replenishment tank 34, and a water supply valve 35 (motorized valve or electromagnetic valve) for opening and closing the water supply pipe 32 is provided.

The gear pump 22 shown in FIG. 1 pumps up the fuel of the internal combustion engine 4. The gear pump 22 is driven by an electric motor 22a. The gear pump 22 is provided in the fuel supply line 40 (fuel supply pipe). In the fuel supply line 40, by driving the gear pump 22, the fuel is pumped up from the underground oil storage tank 6 for storing fuel to the fuel dispensing tank 7 installed at a predetermined height above the ground, and the internal combustion is carried out from this fuel dispensing tank 7. Fuel is supplied to the engine 4. By storing the fuel in the fuel dispensing tank 7, the fuel can be supplied to the internal combustion engine 4 at a required supply pressure even when the gear pump 22 is not driven.

The air compressor 23 fills the air tank 8 with compressed air (starting air) for starting the internal combustion engine 4. The air compressor 23 is driven by an electric motor 23a. The air compressor 23 is provided in the air supply line 50a (air pipe). In the air supply line 50a, the compressed air compressed by driving the air compressor 23 is filled in the air tank 8, and the compressed air is supplied from the air tank 8 to the internal combustion engine 4. By storing the compressed air in the air tank 8, the compressed air can be supplied to the internal combustion engine 4 to be started.

The cooling water pump 24 assembles cooling water that cools the internal combustion engine 4. The cooling water pump 24 is driven by an electric motor 24a. The cooling water pump 24 is provided in the cooling water supply line 60 (cooling water supply pipe). In the cooling water supply line 60, the cooling water is pumped from the cooling water tank 61 by driving the cooling water pump 24, and the cooling water is supplied to the heat exchangers 4 b that cool the internal combustion engines 4. When the heat exchanger (not shown) is also installed in the speed reducer 5, the heat exchanger 4b of the internal combustion engine 4 and the heat exchanger of the speed reducer 5 may be connected in series in the cooling water supply line 60.

FIG. 3 is a schematic configuration diagram of the internal combustion engine starting air supply system 50 according to the first embodiment.
As shown in FIG. 3, the internal combustion engine starting air supply system 50 includes a starting air supply system 51 that supplies the compressed air stored in the air tank 8 to the internal combustion engine 4. As shown in FIG. 1, the starting air supply system 51 is installed for each of a plurality of (in this embodiment, four) internal combustion engines 4. That is, the internal combustion engine starting air supply system 50 includes four starting air supply systems 51.

Two air tanks 8 are installed in the starting air supply system 51. Each of the two air tanks 8 is provided with a pressure gauge 8a, a discharge valve 8b, a charging valve 8c, and a drain valve 8d. The pressure gauge 8a measures the pressure level of the air tank 8. The discharge valve 8b is an open/close valve that opens/closes the downstream side of the air tank 8 in the air supply line 50a. Further, the charging valve 8c is an opening/closing valve that opens/closes the upstream side of the air tank 8 in the air supply line 50a. The drain valve 8d is an open/close valve that discharges drain (liquid) accumulated in the air tank 8 from the bottom of the air tank 8.

Of these two air tanks 8, one is reserved. In the present embodiment, the air tank 8 on the right side of the paper in FIG. 3 is “normally used”, and the discharge valve 8b and the charging valve 8c are open. On the other hand, in FIG. 3, the air tank 8 on the left side of the drawing is a "spare", and the discharge valve 8b and the charging valve 8c are closed. Of the two air compressors 23 that fill the air tank 8 with starting air, the air compressor 23 on the right side of the drawing in FIG. Valve) is open. Further, in FIG. 3, the air compressor 23 on the left side of the paper surface is set as “spare”, and the supply valve 23b (open/close valve) on the downstream side thereof is closed. Although the following description is based on this state, the air tank 8 and the air compressor 23 may be appropriately switched between "normal" and "standby".

An open/close valve 52 and a drain separator 53 are provided between the air compressor 23 and the air tank 8 in the air supply line 50a. The opening/closing valve 52 and the drain separator 53 are included in the starting air supply system 51. The on-off valve 52 is always open, and is closed when performing maintenance and inspection of the starting air supply system 51. The drain separator 53 is arranged downstream of the on-off valve 52 in the air supply line 50a, separates the drain contained in the starting air, and discharges it to the outside of the system. A thermometer 54 that measures the temperature in the system and a pressure gauge 55 that measures the pressure in the system are provided between the drain separator 53 and the charging valve 8c in the air supply line 50a.

On the downstream side of the air tank 8 (exhaust valve 8b) in the air supply line 50a, a start valve 50b (opening/closing device: electric valve or electromagnetic valve) that supplies start air to the internal combustion engine 4 is provided. The start valve 50b is opened when the internal combustion engine 4 is started. Specifically, when it is detected by a tachometer or a speed relay (not shown) that the start valve 50b is opened and the internal motor 4 has reached a predetermined low speed (starting speed) at which the internal combustion engine 4 can be driven independently by driving the air motor, The start valve 50b is closed.

The air compressor 23 is driven based on the measurement result of the pressure gauge 8a (or the pressure gauge 55) under the control of the control device 100 described later. The pressure gauge 8a detects at least a high level and a low level among the pressure levels in the air tank 8. The high level and the low level may be set values that can be set by the administrator. The control device 100 starts the air compressor 23 when a low level is detected from the pressure gauge 8a, and stops the air compressor 23 when a high level is detected from the pressure gauge 8a. As the air compressor 23, it is preferable to employ a reciprocating (compression type) compressor that can maintain a substantially constant charge amount regardless of the pressure on the secondary side (air tank 8).

The pumping station 1 includes a control device 100 that integrally controls the operations of the above-described components. The control device 100 does not show an operation unit such as a CPU (not shown), a storage unit such as a RAM, a ROM, a hard disk drive (HDD), a solid state drive (SSD), an input/output interface for exchanging data with each component, and the like. It is connected by a bus. In addition to the above-described components, the input/output interface is connected with a display device such as a display (not shown) and an input device such as a mouse and a keyboard.

A program for the arithmetic unit to read and execute is stored in the storage unit, and the control device 100 can detect an abnormality of the internal combustion engine starting air supply system 50 described below according to the program. Has become. The control device 100 of the present embodiment measures the number of startups of the internal combustion engine 4 while the pressure level of the air tank 8 decreases from the high level to the low level, and supplies the internal combustion engine start air supply based on the number of startups. The abnormality of the system 50 is detected.

As described above, the number of times of starting the internal combustion engine 4 is to count the number of times the starting valve 50b is opened, the internal combustion engine 4 reaches a predetermined low speed, and the starting valve 50b is closed, that is, the number of times the starting valve 50b is opened and closed. Measure with. The control device 100 detects the abnormality of the system by comparing the number of times of starting with the preset number of times of starting. The reference number of starts is a set value that can be set by the administrator, and may be set based on, for example, a record at the time of factory test, a record at the test run of an actual machine, or the like. For example, if it is possible to start the internal combustion engine 4 about three times on average while the pressure level of the air tank 8 decreases from the high level to the low level, the reference number of starts may be set to three times. ..

FIG. 4 is a diagram showing an example of a method of detecting an abnormality in the internal combustion engine starting air supply system 50 according to the first embodiment.
As shown in FIG. 4, the control device 100 compares the number of times the internal combustion engine 4 is started with the reference number of times each time the air tank 8 is filled, and determines whether the internal combustion engine starting air supply system 50 has an abnormality. judge. Specifically, when the number of starts of the internal combustion engine 4 decreases with respect to the reference number of starts (for example, when the number of starts decreases to less than 3 times), the control device 100 controls the internal combustion engine start air supply system 50. It is determined that an abnormality (for example, air leakage) has occurred.

Further, in order to improve the detection accuracy of the abnormality in the internal combustion engine starting air supply system 50, it is determined whether or not there is an abnormality in the internal combustion engine starting air supply system 50 based on the tendency of the change in the number of startups of the internal combustion engine 4. Is preferred. That is, the control device 100 accumulates the number of startups of the internal combustion engine 4 measured for each number of times the air tank 8 is filled in the storage unit. For example, as shown in FIG. If it is detected by the above, it may be determined that an abnormality has occurred in the internal combustion engine starting air supply system 50. This makes it possible to eliminate a temporary external factor and accurately detect an abnormality in the internal combustion engine starting air supply system 50.

Further, in order to improve the detection accuracy of the abnormality of the internal combustion engine starting air supply system 50, the abnormality of the internal combustion engine starting air supply system 50 is compared with the number of times of starting of the internal combustion engine 4 in another starting air supply system 51. It is preferable to determine the presence or absence of. That is, the control device 100 measures the number of times of starting for each of the plurality of starting air supply systems 51 shown in FIG. 1 and compares the numbers of starting times with each other, and, for example, starts a specific starting air supply system 51. If the number of times is smaller than the number of times of starting the other starting air supply system 51, it may be determined that an abnormality has occurred in the internal combustion engine starting air supply system 50. As a result, the starting air supply system 51 in which the abnormality has occurred can be specified, and even if it is difficult to set an appropriate reference number of starts (threshold value), the internal combustion engine start can be performed by relative evaluation. It is possible to detect an abnormality in the supply air supply system 50.

When an abnormality of the internal combustion engine starting air supply system 50 is detected, as shown in FIG. 3, the valve 61 is opened to specify the inspection gas from the inspection gas supply tank 60 to the air supply line 50a in order to identify the location of the abnormality. For example, it is preferable to supply a colored gas). The inspection gas supply tank 60 has a plurality of locations on the air supply line 50a (A1... Downstream of the discharge valve 8b, A2... Between the drain separator 53 and the charge valve 8c) via the inspection gas supply line 62. A3... Between the supply valve 23b and the on-off valve 52). It should be noted that the inspection gas supply line 62 may be connected to any portion between the air compressor 23, the air tank 8 and the internal combustion engine 4 so that the inspection gas can be injected. As a result, the inspection gas leaks from the location where the air leaks, so that the location of the abnormality in the internal combustion engine starting air supply system 50 can be visually recognized.

As described above, according to the present embodiment described above, the air tank 8 that supplies the starting air to the internal combustion engine 4, the air compressor 23 that fills the air tank 8 with the starting air, and the pressure of the air tank 8. An internal combustion engine starting air supply system including a pressure gauge 8a that measures at least a high level and a low level among the levels, and a control device 100 that drives the air compressor 23 based on the measurement result of the pressure gauge 8a. 50, the control device 100 measures the number of times the internal combustion engine 4 is started while the pressure level of the air tank 8 decreases from the high level to the low level, and the system abnormality is detected based on the number of times of the start. By adopting the configuration of detecting the above, it becomes possible to prevent the starting failure of the internal combustion engine 4 in advance. That is, by measuring the number of times the internal combustion engine 4 is started while the pressure level of the air tank 8 is lowered from the high level to the low level, it is possible to easily determine whether or not there is an abnormality in the system. If the number of start-ups is decreased, the location of the abnormality can be narrowed down from the air tank 8 to the internal combustion engine 4 (specifically, the internal combustion engine starter (air motor or distribution valve)). Therefore, by detecting an abnormality early before the start-up failure of the internal combustion engine 4 and recovering the function by maintenance or repair, it is possible to prevent the start-up failure of the internal combustion engine 4.

(Second embodiment)
Next, a second embodiment of the present invention will be described. In the following description, the same reference numerals will be given to the same or equivalent configurations as those of the above-described embodiment, and the description thereof will be simplified or omitted.

In the second embodiment, the control device 100 measures the cumulative time during which the start valve 50b opens the air supply line 50a while the pressure level of the air tank 8 decreases from the high level to the low level, and also the cumulative time. The above-described embodiment is different in that an abnormality of the internal combustion engine starting air supply system 50 is detected based on the above.

FIG. 5 is a graph showing the relationship between the pressure of the air tank 8 according to the second embodiment and the time when the start valve 50b is opened.
The air compressor starting condition shown in FIG. 5 is the low level of the above-mentioned air tank 8 (pressure level at which the air compressor 23 is started), and is set to 2.2 MPa, for example. The specified pressure is the high level of the above-described air tank 8 (the pressure level at which the air compressor 23 stops), and is set to 3.0 MPa, for example.

In the example shown in FIG. 5, the air tank 8 is configured to be able to start the internal combustion engine 4 three times from the state in which the air is filled with the specified pressure to the air compressor starting condition. Here, Δt1 to Δt3 are times when the start valve 50b is opened when the internal combustion engine 4 is started 1 to 3 times. Further, Δp1 to Δp3 are pressure change (reduction) amounts of the air tank 8 when the internal combustion engine 4 is started 1 to 3 times. The control device 100 detects an abnormality in the internal combustion engine starting air supply system 50 based on the cumulative time (ΣΔt _n ) obtained by adding Δt1 to Δt3. In addition, when the air compressor starting condition is reached during the start of the internal combustion engine (for example, an arbitrary time between Δt3 shown in FIG. 5 ), the subsequent opening time of the start valve 50b may not be included in the cumulative time.

FIG. 6 is a diagram showing an example of a method for detecting an abnormality in the internal combustion engine starting air supply system 50 according to the second embodiment.
As shown in FIG. 6, the control device 100 compares the above-described cumulative time with the reference cumulative time, and determines the abnormality of the internal combustion engine starting air supply system 50. Specifically, an allowable value (allowable range) is set for the reference cumulative time, and when the measured value of the cumulative time exceeds the lower threshold value or the upper threshold value of the allowable value, the internal combustion engine starting air supply system 50. It is determined that an abnormality has occurred. For example, when the cumulative time when the start valve 50b is opened becomes long (+ direction), it is possible that an air filter (not shown) in the air supply line 50a is clogged. Further, when the cumulative time when the start valve 50b is opened becomes short (-direction), there is a possibility that air leakage or the like has occurred in the air supply line 50a. Since the characteristics of the pressure drop in the air tank 8 differ depending on the starting method (air motor method, distribution valve method, etc.) of the internal combustion engine 4, based on the records during factory testing, records during actual machine trial operation, etc. Set a time.

Further, in order to improve the detection accuracy of the abnormality of the internal combustion engine starting air supply system 50, it is determined whether or not there is an abnormality of the internal combustion engine starting air supply system 50 based on the tendency of the change in the cumulative time when the start valve 50b is opened. Preferably. That is, the control device 100 accumulates in the storage unit the accumulated time of opening the start valve 50b, which is measured for each number of times the air tank 8 is filled, and the straight line connecting the current measured value and the previous measured value and the previous time. If the angle difference θ between the measurement value of 1 and the measurement value of the last-previous measurement value is equal to or greater than a predetermined angle, it may be determined that the sign of abnormality has been detected. This determination may be performed below the allowable value for the abnormality determination of the internal combustion engine starting air supply system 50 described above.

Further, in order to improve the detection accuracy of the abnormality of the internal combustion engine starting air supply system 50, the internal combustion engine starting air supply system 50 is compared with the cumulative time when the starting valve 50b in the other starting air supply system 51 is opened. It is preferable to determine the presence or absence of abnormality. That is, the control device 100 measures the cumulative time when the start valve 50b is opened for each of the plurality of starting air supply systems 51 shown in FIG. 1 and compares the cumulative times with each other to determine, for example, a specific starting time. If the cumulative time of the air supply system 51 has increased or decreased compared to the cumulative time of the other starting air supply system 51, it may be determined that an abnormality has occurred in the internal combustion engine starting air supply system 50. As a result, the starting air supply system 51 in which the abnormality has occurred can be specified, and even if it is difficult to set an appropriate reference cumulative time (threshold value), the internal combustion engine start can be performed by relative evaluation. It is possible to detect an abnormality in the supply air supply system 50.

Further, in order to improve the detection accuracy of the abnormality of the air supply system 50 for starting the internal combustion engine, as shown in FIG. 3, the above-mentioned reference cumulative time is corrected based on the thermometer 56 for measuring the temperature in the place. Preferably. That is, the amount of start-up air consumed per start-up of the internal combustion engine 4 increases or decreases depending on the temperature. For example, when the temperature is low, a large amount of starting air is consumed. Therefore, by correcting the reference cumulative time according to the temperature, it is possible to improve the detection accuracy of the abnormality of the internal combustion engine starting air supply system 50. For example, the control device 100 stores the reference accumulated time corresponding to each of the temperatures classified into 0 to 5°C, 5 to 10°C, 10 to 20°C, 20 to 30°C, and 30°C in the storage unit. This makes it possible to set an appropriate reference cumulative time (threshold value).

Further, in the internal combustion engine starting air supply system 50, when the time for supplying the starting air to the internal combustion engine 4 (=starting valve 50b: opening time) exceeds a certain time, the starting valve 50b is once closed and then again. In some cases, control for opening the start valve 50b is performed (when retry control is performed). If such a retry is performed, the soundness of the internal combustion engine 4 may have deteriorated. Therefore, the number of retries and the like may be recorded and it may be determined that the internal combustion engine starting air supply system 50 is abnormal. ..

As described above, according to the above-described second embodiment, the air tank 8 that supplies the starting air to the internal combustion engine 4, the air compressor 23 that fills the air tank 8 with the starting air, and the air tank 8 are provided. Air supply for starting an internal combustion engine, which includes a pressure gauge 8a that measures at least a high level and a low level of the pressure levels, and a control device 100 that drives the air compressor 23 based on the measurement result of the pressure gauge 8a. The system 50 includes an air supply line 50a that supplies start air from the air tank 8 to the internal combustion engine 4, and a start valve 50b that opens and closes the air supply line 50a. Adopting a configuration in which the cumulative time that the start valve 50b opens the air supply line 50a is measured while the pressure level decreases from the high level to the low level and the system abnormality is detected based on the cumulative time. This makes it possible to prevent a start-up failure of the internal combustion engine 4 in advance. That is, by measuring the cumulative time during which the start valve 50b is opened while the pressure level of the air tank 8 is lowered from the high level to the low level, it is possible to easily determine whether or not the system is abnormal. If the cumulative time of opening is increased or decreased, the location of the abnormality can be narrowed down from the air tank 8 to the internal combustion engine 4 (specifically, the internal combustion engine starter (air motor)). Therefore, by detecting an abnormality early before the start-up failure of the internal combustion engine 4 and recovering the function by maintenance or repair, it is possible to prevent the start-up failure of the internal combustion engine 4.

Note that, in the second embodiment, as shown in FIG. 5, a configuration in which the cumulative time when the start valve 50b is opened and closed a plurality of times is measured until the air tank 8 reaches the air compressor starting condition from the specified pressure state As described above, as shown in FIG. 7, the time Δt during which the pressure of the air tank 8 decreases from the specified pressure state to the air compressor starting condition, that is, when the start valve 50b is not opened and closed a plurality of times, for example, the specified pressure state. It is also possible to adopt a configuration in which the cumulative time when the internal combustion engine 4 is started only once is measured and the system abnormality is detected based on the cumulative time.

(Third Embodiment)
Next, a third embodiment of the present invention will be described. In the following description, the same reference numerals will be given to the same or equivalent configurations as those of the above-described embodiment, and the description thereof will be simplified or omitted.

In the third embodiment, the control device 100 drives the air compressor 23, measures the pressure rise time until the pressure level of the air tank 8 changes from the low level to the high level, and based on the pressure rise time. The difference from the above embodiment is that the system abnormality is detected.

Further, the control device 100 of the third embodiment has a normal operation mode and a management operation mode. The normal operation mode is a normal operation mode in which the air compressor 23 is operated for the purpose of keeping the pressure in the air tank 8 at a set value or higher. In this normal operation mode, an independent operation mode in which the air compressor 23 is independently operated, a linked operation mode in which a plurality of air compressors 23 are operated, and the air compressor 23 is automatically operated in accordance with the pressure drop in the air tank 8. The automatic driving mode etc. are included.

The management operation mode is an operation mode for detecting an abnormality in the internal combustion engine starting air supply system 50. In the management operation mode, the control device 100 opens, for example, the drain valve 8d shown in FIG. 3 (hereinafter, may be referred to as a management operation opening/closing valve) to set the pressure level of the air tank 8 to a low level (air compressor). After lowering to the starting condition), the air compressor 23 is driven, and the pressure rise time from the low level to the high level of the pressure level of the air tank 8 is measured.

It is preferable that the management operation mode is set to be performed periodically (for example, about once a month). The control device 100 performs an interlock process so that the regular operation in the management operation mode is not executed when the operation in the normal operation mode described above is performed (see FIG. 8 described later).

8 and 9 are control flows by the control device 100 according to the third embodiment. Note that the No. N machine shown in FIGS. 8 and 9 means any one of the four main pumps 10.
As shown in FIG. 8, first, the control device 100 switches the operation mode to the management operation mode when the inspection timing preset by a timer or the like (not shown) is reached (step S1). Next, the control device 100 confirms various conditions under which the start condition of the management operation mode is satisfied (step S2). The starting conditions are such that the main pump 10 is not in operation, the internal water level of the suction water tank 2 is equal to or lower than the specified water level, the drain valve 8d that is the opening/closing valve for management operation is closed, and the preparation for management operation is not performed. Includes confirmation of completed conditions.

Next, the control device 100 drives the air compressor 23 (step S3). Then, the control device 100 confirms whether or not the pressure level of the air tank 8 is at a high level (specified pressure) (step S4). Then, when the pressure gauge 8a detects the high level, the control device 100 stops the air compressor 23 (step S5).

As shown in FIG. 9, next, the control device 100 opens the drain valve 8d (step S6), and the pressure until the pressure level of the air tank 8 becomes a low level (air compressor starting condition) (step S7). The decrease time ΔT1 is measured.
After that, the control device 100 starts the air compressor 23 (step S8) and, at the same time, closes the drain valve 8d (step S8-1). The air compressor 23 may be started after closing the drain valve 8d.

Next, the control device 100 starts the air compressor 23 (step S8) and measures the pressure rise time ΔT2 until the pressure level of the air tank 8 reaches a high level (step S9). Then, when the pressure gauge 8a detects the high level, the control device 100 stops the air compressor 23.

After that, the control device 100 maintains the state (step S10) for a certain period of time, and the natural pressure decreases until the pressure level of the air tank 8 reaches a predetermined pressure level (less than the high level and higher than the low level) (step S11). Measure the time ΔT3. The natural pressure decrease time ΔT3 may be measured individually without being in the management operation mode. However, when the start valve 50b is opened or the air compressor 23 is operated during the measurement of the natural pressure decrease time ΔT3, the natural pressure decrease time ΔT3 may be reset.
Finally, the control device 100 stores the data of ΔT1 to ΔT3 in the storage unit, determines whether or not there is an abnormality in the internal combustion engine starting air supply system 50 based on the data, and if there is an abnormality, it is illustrated. Do not allow the display device to display a failure display.
As described above, the management operation of the internal combustion engine starting air supply system 50 is completed.

The control device 100 detects the abnormality of the internal combustion engine starting air supply system 50 by comparing the pressure increase time ΔT2 with a preset reference pressure increase time. Specifically, similarly to the above-described second embodiment (similar to FIG. 6), a permissible value (permissible range) is set for the reference pressure increase time, and the actual measured value of the cumulative time is the lower threshold value of the permissible value. Alternatively, when the upper threshold is exceeded, it may be determined that an abnormality has occurred in the internal combustion engine starting air supply system 50 (see FIG. 6). For example, when the pressure rise time ΔT2 is long (+ direction), the air compressor 23 is deteriorated, various valves (such as a check valve) in the air supply line 50a are fixed, air is leaked from the air tank 8, and the air tank is There is a possibility that air leakage has occurred in the air supply line 50a on the upstream side of No. 8.
When a spare base is installed in the air tank 8, the spare base (spare air tank) may be switched to check whether the abnormality is detected again. If it is not detected again, it can be specified that the air tank 8 has an abnormality (air leakage).

FIG. 10 is a diagram showing an example of a reference pressure increase time setting method according to the third embodiment (when the number of internal combustion engines 4 (main pumps 10) is one).
The reference pressure rise time (that is, the theoretical value of the charging time t of the air tank 8) changes based on the capacity of the air tank 8. For example, the atmospheric pressure in the field is P0 [MPa], the temperature in the field is T0 [° C.], the initial pressure in the air tank 8 is P1 (<P _max )[MPa], and the initial temperature in the air tank 8 is T1. (=T0) [° C.], and the air tank 8 (and the capacity of the air supply line 50a) is V [m ³ ].

From this state, the pressure inside the air tank 8 is P2 (=P _max )[MPa], and the temperature inside the air tank 8 is T2 (=T0) [° C.] (that is, when the temperature is equalized to the temperature in the field before and after charging). Assuming that the amount of air charged into the air tank 8 until V1 is V1 is set to V1 under the condition of an ideal gas, the following relational expression (1) is established from Dalton's law and Boyle-Charles' law. It can be calculated by the formula (2).

Then, assuming that the average amount of charge from the air compressor 23 is V'[m ³ /min], the charge time t (reference pressure increase time) can be calculated by the equation (3). The average charge amount can be calculated from the characteristic curve of the installed air compressor 23.

FIG. 11 is a diagram showing an example of a reference pressure increase time setting method according to the third embodiment (when there are a plurality of internal combustion engines 4 (main pumps 10)).
As in this embodiment, there are a plurality of internal combustion engines 4, each internal combustion engine 4 is provided with a starting air supply system 51, and each of the starting air supply systems 51 includes the air compressor 23 via the air supply line 50a. When connected to, the reference pressure increase time (theoretical value of the charging time t of all the connected air tanks 8) may be set as follows.

Assuming that the atmospheric pressure in the field is P0 [MPa], the temperature in the field is T [°C], the pressure of the air tank 8 for supplying the starting air to the internal combustion engine 4 of the first unit is P1 [MPa], and the temperature is T [°C]. ], the pressure of the air tank 8 for supplying the starting air to the internal combustion engine 4 of Unit 2 is P2 (>P1) [MPa], the temperature is T [°C], and the starting air is supplied to the internal combustion engine 4 of Unit 3 The pressure of the air tank 8 to be supplied is P3 (>P2) [MPa], and the temperature is T [°C]. Further, the capacities V of the air tanks 8 of Units 1 to 3 are assumed to be equal.

FIG. 12 and FIG. 13 are explanatory diagrams for explaining the calculation method of the reference pressure increase time setting method according to the third embodiment (when there are a plurality of internal combustion engines 4 (main pumps 10)).
As shown in the upper diagram of FIG. 12, it is assumed that P1 is the air compressor starting condition (low level) and P _max is the specified pressure (high level). Further, at this time, it is assumed that the relationship of P1<P2<P3<P _max is established. From this state, as shown in the lower diagram of FIG. 12, the charge amount V _1-1 until the pressure of the air tank 8 of the first unit rises to P2 can be calculated by the equation (4).

Then, assuming that the average amount of charge from the air compressor 23 is V′ _1-1 [m ³ /min], the charge time t _1-1 can be calculated by the equation (5).

Further, as shown in the upper diagram of FIG. 13 from the state shown in the lower diagram of FIG. 12, the charge amount V _1-2 until the pressure of the air tank 8 of Units 1 and 2 rises to P3 is calculated by the equation (6). can do.

Then, assuming that the average amount of charge from the air compressor 23 is V′ _1-2 [m ³ /min], the charge time t _1-2 can be calculated by the equation (7).

Further, as shown in the lower diagram of FIG. 13 from the state shown in the upper diagram of FIG. 13, the charge amount V _1-3 until the pressure of the air tank 8 of Units 1 to 3 rises to P _max is expressed by the equation (8). It can be calculated.

Then, assuming that the average amount of charge from the air compressor 23 is V′ _1-3 [m ³ /min], the charge time t _1-3 can be calculated by the equation (9).

In conclusion, the total charging time t (reference pressure rise time) can be calculated by the equation (10).

As described above, according to the above-described third embodiment, the air tank 8 for supplying the starting air to the internal combustion engine 4, the air compressor 23 for filling the air tank 8 with the starting air, and the air tank 8 are provided. Air supply for starting an internal combustion engine, which includes a pressure gauge 8a that measures at least a high level and a low level of the pressure levels, and a control device 100 that drives the air compressor 23 based on the measurement result of the pressure gauge 8a. In the system 50, the control device 100 drives the air compressor 23, measures the pressure rise time ΔT2 from when the pressure level of the air tank 8 changes from the low level to the high level, and based on the pressure rise time. Thus, by adopting the configuration of detecting the abnormality of the system, it becomes possible to prevent the starting failure of the internal combustion engine 4 in advance. That is, by measuring the pressure rise time ΔT2 from when the pressure level of the air tank 8 changes from the low level to the high level, it is possible to easily determine whether or not there is an abnormality in the system, and temporarily increase the pressure rise time ΔT2. In this case, the location of the abnormality can be narrowed down from the air compressor 23 to the air tank 8. Therefore, by detecting an abnormality early before the start-up failure of the internal combustion engine 4 and recovering the function by maintenance or repair, it is possible to prevent the start-up failure of the internal combustion engine 4.

Further, as in the present embodiment, a plurality of internal combustion engines 4 are installed, and each internal combustion engine 4 is provided with a starting air supply system 51 including an air tank 8 and a pressure gauge 8a. When each of them is connected to the air compressor 23, the control device 100 drives the air compressor 23 to change the pressure level of the air tank 8 from the low level to the high level in all of the starting air supply system 51. It is advisable to detect the system abnormality by measuring the total pressure rise time ΔT2 up to the above and comparing the total pressure rise time with the reference pressure rise time (total charging time t described above). As a result, it is possible to detect a system abnormality in all the starting air supply systems 51 by performing a single management operation.

In addition, when performing system abnormality detection for each starting air supply system 51, it is advisable to install a control solenoid valve 52A (switching device) instead of the on-off valve 52, as shown in FIG. The connection with the air compressor 23 is switched by the control solenoid valve 52A, the pressure increase time ΔT2 is measured for each starting air supply system 51, and the pressure increase times ΔT2 are compared with each other to detect a system abnormality. Thus, it is possible to identify whether the cause of the abnormality is the air compressor 23 side or the air supply line 50a side. For example, when the air compressor 23 is common and the pressure increase time ΔT2 is different for each starting air supply system 51, it can be determined that the cause of the abnormality is on the starting air supply system 51 side.

Further, as shown in FIG. 9, by measuring and monitoring the pressure decrease time ΔT1, for example, when the pressure decrease time ΔT1 becomes long, an abnormality such as sticking or clogging on the secondary side of the air tank 8 is detected. Can be detected.
Further, as shown in FIG. 9, the natural pressure decrease time ΔT3 is measured, and for example, by comparing each machine, it is determined whether the air leakage is natural or the air supply line 50a is damaged. be able to.
The measurement of the pressure decrease time ΔT1, the pressure increase time ΔT2, and the natural pressure decrease time ΔT3 described above may be performed not only during the management operation but also during the normal operation.

After the actual drainage operation is completed, when there is a unit whose pressure in the air tank 8 is lower than the specified pressure, the air compressor 23 is started to recover all the units to the specified pressure, so that a start failure of the internal combustion engine 4 may occur. It becomes possible to prevent it. In particular, since it takes time to fill the air tank 8 (the time to fill the air tank 8 is about 30 to 60 min per unit), if the air tank 8 is filled in advance, in the event of actual drainage operation, Even if the start fails, the number of retries can be secured and reliability can be secured.

(Fourth Embodiment)
Next, a fourth embodiment of the present invention will be described. In the following description, the same reference numerals will be given to the same or equivalent configurations as those of the above-described embodiment, and the description thereof will be simplified or omitted.

The fourth embodiment differs from the above-described embodiments in that the control device 100 detects an abnormality in the system based on the natural decrease in the internal pressure of the air tank 8.

FIG. 15 is a control flow by the control device 100 according to the fourth embodiment.
As shown in FIG. 15, the control device 100 starts the detection of the natural decrease in the internal pressure of the air tank 8 at the inspection timing preset by a timer (not shown) or the like (step S21). First, the control device 100 drives the air compressor 23 to bring the air tank 8 (No. X) to be detected into a fully filled state (for example, 3.0 MPa) (step S22). When the air tank 8 is fully charged, the control device 100 stops the air compressor 23 (step S23).

Next, the control device 100 starts measuring the time elapsed from the stop of the air compressor 23, and also starts measuring the room temperature in which the air tank 8 is installed (step S24). Note that, during this time, when the starting air is supplied from the air tank 8 to the internal combustion engine 4 (when step S25 is “Yes”), the decrease in the internal pressure of the air tank 8 is not a natural decrease, and therefore the control device 100 , The elapsed time and the measurement of the indoor temperature are reset (step S27), and the process returns to step S21.

On the other hand, when the starting air is not supplied from the air tank 8 to the internal combustion engine 4 during this time (when step S25 is “No”), the control device 100 is preset from the start of the measurement of the elapsed time and the room temperature. It is determined whether or not the set number of days (for example, 10 days) when the system abnormality is not detected has passed (step S26). When the set number of undetected days has elapsed from the start of measurement (when Step S26 is “Yes”), the control device 100 determines that there is no abnormality in the system, and resets the measurement of the elapsed time and the room temperature (Step S27), It returns to step S21.

The control device 100 lowers the internal pressure of the air tank 8 to a management threshold value (for example, 2.7 MPa) or less during the period from the start of measurement until the non-detected set number of days elapses (when Step S26 is “No”). It is determined whether or not (step S28). When the internal pressure of the air tank 8 is larger than the threshold value for management (when step S28 is "No"), it returns to step S25. Since the internal pressure of the air tank 8 may decrease due to the influence of the internal temperature, it is advisable to set the management threshold value to a value that takes this into consideration. That is, the control device 100 may correct the management threshold value based on the room temperature.

On the other hand, when the internal pressure of the air tank 8 has dropped below the threshold for management (when step S28 is “Yes”), the control device 100 causes the display device (not shown) to leak air from the air tank 8. Is displayed (step S29), and the date and time of occurrence of air leakage, elapsed time, room temperature, etc. are displayed (step S30). At this time, the measurement values may be reset while stopping the measurement of the elapsed time and the room temperature.

Further, the control device 100 may move to step S31 when the internal pressure of the air tank 8 is significantly reduced. In step S31, it is determined whether the internal pressure of the air tank 8 has dropped below a second management threshold value (for example, 2.5 MPa). The second management threshold value may be set to a value smaller than the management threshold value in step S28. As a result, it is possible to detect a minor system abnormality (light failure) in step S28 and a severe system abnormality (major failure) in step S31.

If the internal pressure of the air tank 8 is larger than the second management threshold value (step S31 is “No”), the process returns to step S25. On the other hand, when the internal pressure of the air tank 8 drops below the second management threshold value (when step S31 is “Yes”), the control device 100 causes the display device (not shown) to seriously leak air from the air tank 8. When a second warning is displayed (step S29), the date and time of air leakage, elapsed time, room temperature, etc. are displayed (step S30). At this time, the measurement values may be reset while stopping the measurement of the elapsed time and the room temperature.
As described above, the system abnormality can be detected based on the natural decrease in the internal pressure of the air tank 8.

(Fifth Embodiment)
Next, a fifth embodiment of the present invention will be described. In the following description, the same reference numerals will be given to the same or equivalent configurations as those of the above-described embodiment, and the description thereof will be simplified or omitted.

The fifth embodiment differs from the above-described embodiments in that the control device 100 detects a system abnormality based on the charging time of the air tank 8 by the air compressor 23.

FIG. 16 is a control flow by the control device 100 according to the fifth embodiment.
As shown in FIG. 16, first, the control device 100 switches the operation mode to the management operation mode when the inspection timing preset by a timer or the like (not shown) is reached (step S41). At this time, the internal pressure of the air tank 8 (No. A, No. B) may be lower than a predetermined internal pressure at the start of measurement (2.7 MPa in steps S44 and S45 described later) by manual or automatic control.

Next, the air compressor 23 is manually started (step S42), and when the start condition of the management operation mode is satisfied, the control device 100 starts the filling operation of the air tank 8 by the air compressor 23 (step S43). .. When the internal pressure of the air tank 8 (No. A, No. B) becomes equal to or higher than a predetermined internal pressure (for example, 2.7 MPa) due to the charging operation of the air compressor 23 (steps S44, S45), the control device 100. The measurement of the charging time from 2.7 MPa to 3.0 MPa (full charging) is started (step S46), and the measurement of the room temperature in which the air tank 8 is installed is also started (step S47).

When the internal pressure of the air tank 8 (No. A, No. B) becomes full (for example, 3.0 MPa or more) (steps S48 and S49), the control device 100 stops the air compressor 23 (step). S50). Then, the control device 100 displays the date and time of detection, the charging time, the number of the operated air compressor 23, the room temperature, etc. on a display device (not shown) (step S51). Further, the control device 100 stops measuring the elapsed time and the room temperature and resets the measured values (step S52).

If the filling time of the air tank 8 is equal to or greater than the predetermined warning value (step S53), the control device 100 determines that the filling time is longer than usual, and the control device 100 displays an abnormality of the filling time on the display device (not shown). A warning to be displayed is issued (step S54). Then, the control device 100 causes the display device (not shown) to display the date and time of detection, the charging time, the number of the operated air compressor 23, the room temperature, and the like (step S55).

Further, when the filling time of the air tank 8 is not less than the second warning value (value larger than the warning value of step S53) (step S56), the control device 100 determines that the filling time is abnormally longer than usual. Then, the display device (not shown) issues a second warning (such as a serious failure warning) for displaying an abnormality in the charging time (step S57). Then, the control device 100 causes the display device (not shown) to display the date and time of detection, the charging time, the number of the operated air compressor 23, the room temperature, and the like (step S58).
As described above, the abnormality of the system can be detected based on the filling time of the air tank 8 by the air compressor 23.

(Sixth Embodiment)
Next, a sixth embodiment of the present invention will be described. In the following description, the same reference numerals will be given to the same or equivalent configurations as those of the above-described embodiment, and the description thereof will be simplified or omitted.

The sixth embodiment differs from the above embodiments in that the control device 100 detects a system abnormality based on the continuous operation time of the air compressor 23.

FIG. 17 is a control flow by the control device 100 according to the sixth embodiment.
As shown in FIG. 17, first, the control device 100 switches the operation mode to the automatic operation mode (step S61). Next, when the pressure level of the air tank 9 becomes the low level (air compressor starting condition) and the air compressor 23 is started (step S62), the control device 100 causes the air compressor 23 to measure the continuous operation time. Start (step S63).

When the pressure level of the air tank 8 is changed from the low level to the high level by the operation by the air compressor 23 and the air compressor 23 is stopped (step S64), the control device 100 measures the continuous operation time of the air compressor 23. Stop and reset the measured value (step S65).

On the other hand, when the continuous operation time of the air compressor 23 (for example, about 1 hour normally) exceeds the preset maximum continuous operation time (for example, 2 hours) (step S66), the control device 100 is not shown. A warning is displayed on the display device to display an abnormality in continuous operation time (step S67). Then, the control device 100 causes the display device (not shown) to display the date and time of detection, the continuous operation time, the room temperature, and the like (step S68).
As described above, the system abnormality can be detected based on the continuous operation time of the air compressor 23.

While the preferred embodiments of the invention have been described and described above, it should be understood that these are illustrative of the invention and should not be considered limiting. Additions, omissions, substitutions, and other changes can be made without departing from the scope of the invention. Therefore, the present invention should not be considered limited by the foregoing description, but rather by the claims.

For example, in the above-described first embodiment, it has been described that the abnormality of the internal combustion engine starting air supply system 50 is detected based on the number of times the internal combustion engine 4 is started. Although it consumes a small amount of compressed air, it consumes compressed air. Therefore, by counting the number of times of stoppage as well as the number of times of startup, more accurate management becomes possible.

Further, for example, also in the first embodiment, the reference number of starting times may be corrected based on the thermometer 56 as in the second embodiment described above. For example, the control device 100 may set the reference start number to be 2 times at the temperature of 0 to 10° C. and the reference start number to be 3 times at the temperature of 10° C.

Further, for example, the configurations and control flows of the first to sixth embodiments can be replaced and combined as appropriate.

DESCRIPTION OF SYMBOLS 1... Pump station (pump equipment), 4... Internal combustion engine, 4a... Drive shaft, 4b... Heat exchanger, 5... Reducer, 8... Air tank, 8a... Pressure gauge, 8b... Exhaust valve, 8c... Fill valve , 8d... Drain valve, 10... Main pump (pump), 20... Auxiliary machine, 23... Air compressor, 23a... Electric motor, 23b... Supply valve, 50... Air supply system for starting internal combustion engine, 50a... Air supply line ( Air piping), 50b...Starting valve (opening/closing device), 51...Starting air supply system, 52...Opening/closing valve, 52A...Management solenoid valve (switching device), 53... Drain separator, 54... Thermometer, 55... Pressure gauge, 56... Thermometer, 60... Inspection gas supply tank, 61... Valve, 62... Inspection gas supply line, 100... Control device

Claims (15)

An air tank for supplying starting air to the internal combustion engine,
An air compressor for filling the starting air into the air tank,
Of the pressure levels of the air tank, a pressure gauge for measuring at least a high level and a low level,
An air supply system for starting an internal combustion engine, comprising: a control device for driving the air compressor, based on a measurement result of the pressure gauge,
The control device measures the number of times the internal combustion engine is started while the pressure level of the air tank decreases from the high level to the low level, and detects an abnormality of the system based on the number of times of start. An air supply system for starting an internal combustion engine, comprising: The air supply system for starting an internal combustion engine according to claim 1, wherein the control device compares the number of times of start-up with a preset number of times of start-up to detect an abnormality of the system. A plurality of the internal combustion engines are installed,
For each of the internal combustion engines, the air tank, a starting air supply system including the pressure gauge,
The control device measures the number of times of starting for each of the starting air supply systems and compares the number of times of starting with each other to detect an abnormality of the system. Air supply system for starting internal combustion engine. An air pipe for transferring the starting air from the air tank to the internal combustion engine,
An opening and closing device for opening and closing the air pipe,
The control device further measures a cumulative time when the switchgear opens the air pipe while the pressure level of the air tank is lowered from the high level to the low level, and based on the cumulative time, The internal combustion engine starting air supply system according to claim 1, wherein an abnormality of the system is detected. An air tank for supplying starting air to the internal combustion engine,
An air compressor for filling the starting air into the air tank,
Of the pressure levels of the air tank, a pressure gauge for measuring at least a high level and a low level,
An air supply system for starting an internal combustion engine, comprising: a control device for driving the air compressor, based on a measurement result of the pressure gauge,
An air pipe for transferring the starting air from the air tank to the internal combustion engine,
An opening and closing device for opening and closing the air pipe,
The control device measures a cumulative time when the switchgear opens the air pipe while the pressure level of the air tank is lowered from the high level to the low level, and based on the cumulative time, a system abnormality occurs. An air supply system for starting an internal combustion engine, characterized by: The air supply system for starting an internal combustion engine according to claim 4 or 5, wherein the control device compares the accumulated time with a preset reference accumulated time to detect a system abnormality. Equipped with a thermometer to measure the temperature,
The air supply system for starting an internal combustion engine according to claim 6, wherein the control device corrects the reference cumulative time based on a measurement result of the thermometer. A plurality of the internal combustion engines are installed,
For each of the internal combustion engines, the air tank, the pressure gauge, the air pipe, a starting air supply system including the opening and closing device,
8. The control device measures the cumulative time for each of the starting air supply systems, compares the cumulative times with each other, and detects an abnormality in the system. An air supply system for starting an internal combustion engine according to claim 1. The control device further drives the air compressor to measure a pressure rise time until the pressure level of the air tank changes from the low level to the high level, and a system based on the pressure rise time. 9. The internal combustion engine starting air supply system according to claim 1, wherein the abnormality is detected. An air tank for supplying starting air to the internal combustion engine,
An air compressor for filling the starting air into the air tank,
Of the pressure levels of the air tank, a pressure gauge for measuring at least a high level and a low level,
An air supply system for starting an internal combustion engine, comprising: a control device for driving the air compressor, based on a measurement result of the pressure gauge,
The control device drives the air compressor, measures the pressure rise time until the pressure level of the air tank changes from the low level to the high level, and based on the pressure rise time, a system abnormality occurs. An air supply system for starting an internal combustion engine, characterized by: The air supply for starting the internal combustion engine according to claim 9 or 10, wherein the control device compares the pressure increase time with a preset reference pressure increase time to detect a system abnormality. system. Equipped with a plurality of the air compressor,
12. The control device measures the pressure rise time for each of the air compressors, compares the pressure rise times with each other, and detects an abnormality in a system. An air supply system for starting an internal combustion engine according to claim 1. A plurality of the internal combustion engines are installed,
For each of the internal combustion engines, the air tank, a starter air supply system including the pressure gauge is provided, and a switching device that switches the connection with the air compressor to any one of the starter air supply system, Prepare,
The control device measures the pressure increase time for each of the starting air supply systems, compares the pressure increase times with each other, and detects an abnormality of the system. An air supply system for starting an internal combustion engine according to any one of claims. A plurality of the internal combustion engines are installed,
For each of the internal combustion engines, the air tank, a starting air supply system including the pressure gauge,
Each of the starting air supply system is connected to the air compressor,
The control device drives the air compressor and measures the total pressure increase time from the low level to the high level of the pressure level of the air tank in all of the starting air supply system, The internal combustion engine starting air supply system according to claim 9, wherein an abnormality of the system is detected based on the total pressure rise time. A pump for pumping liquid,
An internal combustion engine for driving the pump,
Pumping air for starting the said internal combustion engine is supplied, The air supply system for internal combustion engine start as described in any one of Claims 1-14 is provided, The pump equipment characterized by the above-mentioned.

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