JP6859169B2 - Leakage location identification device, fluid supply system, ship, and leakage location identification method - Google Patents

Description

The present invention relates to a leak location identification device, a fluid supply system, a ship, and a leak location identification method.

Patent Document 1 describes a technique for controlling and operating a pump so as to maintain an appropriate water supply pressure in consideration of a water discharge facility, a fire occurrence location, and the like.
In order to maintain the function as a ship, the ship is equipped with various piping systems such as fire extinguishing seawater, equipment cooling seawater, and cooling cold water. If the piping inside the ship is damaged due to a collision or the like and damage such as water leakage occurs, the damaged parts are separated by valves installed in various places, and the functions of various systems can be maintained. At present, the occupants are investigating, detecting, and grasping the damage situation, and separating and restoring the damaged part according to the damage situation.

Japanese Unexamined Patent Publication No. 2012-193742

By the way, when leakage damage occurs in a fluid piping system that is being labor-saving, such as a man-saving ship, recognition of the damage occurrence points of various pipes, planning of separation points, etc. There are few workers such as occupants who can handle valve shutoff operations. Therefore, if the worker has to take measures such as recognizing the location where the damage has occurred, there will be a shortage of workers who can continue other work. As a result, if a fire or the like occurs, the response to fire extinguishing activities may be delayed, leading to the spread of damage.

The present invention has been made in view of the above circumstances, and provides a leak location identification device, a fluid supply system, a ship, and a leak location identification method that can identify a leak location in a fluid piping system without the need for an operator to take action. It is to provide.

The following configuration is adopted to solve the above problems.
According to the first aspect of the present invention, the leak location identification device is a leak location identification device for identifying a leak location in a fluid piping system including a plurality of valves, and among the plurality of valves, the fluid at the valve position. The pressure drop valve specifying part that specifies the pressure drop valve, which is a valve whose pressure has dropped by the first threshold value or more, the flow direction detecting part that detects the flow direction of the fluid passing through the pressure drop valve, and the flow direction A first pressure drop valve having a first direction and a second pressure drop valve whose flow direction is opposite to the first direction and adjacent to the first pressure drop valve. The location between the above and the location where the flow in the first direction and the flow in the second direction meet is provided with a leakage location specifying portion that identifies the leakage location. The specific part is a flow path specifying part that specifies a first flow path through which the fluid flows in the first direction, a second flow path through which the fluid flows in the second direction, and a flow path specifying part on the first flow path. A score calculation unit for calculating the score attached to the pressure drop valve and the score attached to the pressure drop valve on the second flow path is provided, and the score is larger toward the downstream side in the first direction. The leak location identification portion has the first pressure drop valve having the maximum number of points on the first flow path and the minimum number of points on the second flow path. The portion between the second pressure drop valve and the leak portion is specified.
With this configuration, the pressure drop valve, which is a valve whose fluid pressure at the valve position has dropped by the first threshold value or more, is specified, so that it is possible to grasp that a leak has occurred in the fluid piping system. Further, since the flow direction of the fluid passing through the pressure drop valve is detected, the candidates for the leakage location can be narrowed down. Further, the first pressure drop valve whose flow direction is the first direction and the second pressure whose flow direction is opposite to the first direction and which is adjacent to the first pressure drop valve. The location between the lowering valve and the junction of the first-direction flow and the second-direction flow is identified as the leak location. Therefore, the leak location can be finally identified.
Therefore, it is possible to identify the leak location of the fluid piping system without the need for an operator to take action.
Further, a first flow path through which the fluid flows in the first direction and a second flow path through which the fluid flows in the second direction are specified. Further, the points given to the pressure drop valve on the first flow path and the points given to the pressure drop valve on the second flow path are calculated. Further, the score increases toward the downstream side in the first direction and increases toward the upstream side in the second direction. Therefore, the direction of the fluid flow can be quantified (visualized). Further, a portion between the first pressure drop valve having the maximum number of points on the first flow path and the second pressure drop valve having the minimum number of points on the second flow path is specified as a leak location. Therefore, it is possible to identify the leak location of the fluid piping system while quantifying (visualizing) the direction of the fluid flow.

According to the second aspect of the present invention, in the leak location identifying device according to the first aspect, each of the plurality of valves includes a first pressure detecting unit that detects the pressure of the fluid on one side of the valve body. A second pressure detecting unit for detecting the pressure of the fluid on the other side of the valve body is provided, and the pressure drop valve specifying unit is the first pressure detecting unit or the second pressure detecting unit detected by the second pressure detecting unit. The pressure drop valve is identified based on the pressure of the fluid, and the flow direction detection unit uses the pressure of the fluid detected by the first pressure detection unit and the fluid detected by the second pressure detection unit. The flow direction may be detected based on the pressure of.
With this configuration, the pressure of the fluid on one side of the valve body and the pressure of the fluid on the other side of the valve body are detected. Also, the pressure drop valve is identified based on the pressure of the fluid. Also, the flow direction is detected based on the pressure of the fluid. Therefore, the pressure of the fluid can be used for both identification of the pressure drop valve and detection of the flow direction.

According to the third aspect of the present invention, the leak location identification device according to the second aspect further includes a central control device having a communication unit and a power supply device, and each of the plurality of valves communicates with the arithmetic unit. The device and a battery are provided, and when the power supply device is in operation, the power supply device drives the central control device, and the central control device is input to the central control device via a first communication line. The leak location is identified based on the detection results of the first pressure detection unit and the second pressure detection unit of each of the plurality of valves, and when the power supply device is not operating, the battery is used for the arithmetic unit and the communication. The first pressure detection unit and the second pressure of each of the plurality of valves input to the arithmetic unit via a second communication line different from the first communication line, which drives the apparatus. The leak location may be specified based on the detection result of the detection unit.
With this configuration, even when the power supply device is not operating, it is possible to identify the leakage point of the fluid piping system without the need for an operator to take action.

According to a fourth aspect of the invention, the fluid supply system comprises a fluid conduit system comprising a plurality of valves, the leak identifying apparatus according to the first or second aspect, the.

According to the fifth aspect of the present invention, the ship comprises the fluid supply system according to the fourth aspect.

According to the sixth aspect of the present invention, the leak location identification method is a leak location identification method for identifying a leak location in a fluid piping system including a plurality of valves, and the fluid at the valve position among the plurality of valves. The pressure drop valve specifying step of specifying the pressure drop valve, which is a valve whose pressure has dropped by the first threshold value or more, the flow direction detecting step of detecting the flow direction of the fluid passing through the pressure drop valve, and the flow direction A first pressure drop valve having a first direction and a second pressure drop valve whose flow direction is opposite to the first direction and adjacent to the first pressure drop valve. a point between the, position in which the first direction of flow and the second orientation of the flows merge is and a leakage part specifying step of specifying said a leak portion, the leakage In the location identification step, the first flow path through which the fluid flows in the first direction and the second flow path through which the fluid flows in the second direction are specified, and the pressure on the first flow path is specified. The score given to the drop valve and the score given to the pressure drop valve on the second flow path are calculated, and the score becomes larger toward the downstream side in the first direction and the second In the leak location identification step, the first pressure drop valve having the maximum number of points on the first flow path and the second pressure drop valve having the minimum number of points on the second flow path are larger toward the upstream side in the direction. The part between the two is specified as the leaked part .
With this configuration, the pressure drop valve, which is a valve whose fluid pressure at the valve position has dropped by the first threshold value or more, is specified, so that it is possible to grasp that a leak has occurred in the fluid piping system. Further, since the flow direction of the fluid passing through the pressure drop valve is detected, the candidates for the leakage location can be narrowed down. Further, the first pressure drop valve whose flow direction is the first direction and the second pressure whose flow direction is opposite to the first direction and which is adjacent to the first pressure drop valve. The location between the lowering valve and the junction of the first-direction flow and the second-direction flow is identified as the leak location. Therefore, the leak location can be finally identified.
Therefore, it is possible to identify the leak location of the fluid piping system without the need for an operator to take action.

According to the leak location identification device, the fluid supply system, the ship, and the leak location identification method, the leak location of the fluid piping system can be identified without the need for an operator to take action.

It is a figure which shows an example of the schematic structure of the leakage location identification device of this embodiment. It is a figure which shows an example of the details of the valve shown in FIG. It is a figure which shows the information about the fluid piping system shown in FIG. 1 which is stored in the storage part. It is a flowchart which shows the process executed by the leakage part identification apparatus shown in FIG. It is a figure for demonstrating a specific example of the processing executed by the leakage part identification apparatus when a leakage part occurs.

Next, the leak location identification device 1 according to the embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing an example of a schematic configuration of the leak location identification device 1 of this embodiment. FIG. 2 is a diagram showing a detailed example of the valve AA shown in FIG.
The leak location identification device 1 in this embodiment is a device for identifying a leak location in the fluid piping system A.
In the example shown in FIG. 1, valves AA to AJ, pumps P1 and P2, devices HE1 and HE2 such as heat exchangers, and branch joints AN1 to AN4 are connected by pipes AL1 to AL18. , Fluid piping system A is configured. The pump P1 and the first end of the branch joint AN1 are connected by a pipe AL01. The second end of the branch joint AN1 and one end of the valve AA are connected by the pipe AL02. The other end of the valve AA and the first end of the branch joint AN2 are connected by the pipe AL03. The second end of the branch joint AN2 and one end of the valve AB are connected by a pipe AL04. The other end of the valve AB and one end of the valve AC are connected by a pipe AL05.
The other end of the valve AC and one end of the valve AD are connected by the pipe AL06. The other end of the valve AD and the first end of the branch joint AN4 are connected by a pipe AL07. The second end of the branch joint AN4 and the first end of the branch joint AN3 are connected by the pipe AL08. The second end of the branch joint AN3 and one end of the valve AE are connected by the pipe AL09. The other end of the valve AE and one end of the valve AF are connected by a pipe AL10. The other end of the valve AF and one end of the valve AG are connected by a pipe AL11. The other end of the valve AG and one end of the valve AH are connected by a pipe AL12. The other end of the valve AH and the third end of the branch joint AN1 are connected by the pipe AL13.
The third end of the branch joint AN2 and one end of the valve AI are connected by the pipe AL14. The other end of the valve AI and the device HE1 are connected by the pipe AL15. The third end of the branch joint AN3 and one end of the valve AJ are connected by the pipe AL16. The other end of the valve AJ and the device HE2 are connected by a pipe AL17. The third end of the branch joint AN4 and the pump P2 are connected by the pipe AL18.

In the example shown in FIG. 1, the leak location identification device 1 includes a central control device 11 and a power supply device 12. The central control device 11 includes a communication unit 11a, a processing unit 11b, and a storage unit 11c. The processing unit 11b includes a pressure drop valve specifying unit 11b1, a flow direction detecting unit 11b2, and a leak location specifying unit 11b3. The leak location specifying unit 11b3 includes a flow path specifying unit 11b31 and a point calculation unit 11b32.

In the example shown in FIG. 2, the valve AA includes a valve body (not shown), a pressure sensor AA1, a pressure sensor AA2, an arithmetic unit AA3, a switchgear AA4, a communication device AA5, and a battery AA6. ing. The valves AB to AJ shown in FIG. 1 are configured in the same manner as the valves AA.
The pressure sensor AA1 detects the pressure of the fluid at the position on the first side (right side of FIG. 2) of the valve body. The pressure sensor AA2 detects the pressure of the fluid at the position on the second side (left side in FIG. 2) of the valve body. That is, the pressure sensors AA1 and AA2 detect the pressure of the fluid at the position of the valve AA. The switchgear AA4 opens and closes the valve body. During operation of the power supply device 12, the switchgear AA4 is driven by the power supply device 12 or by a force generated by a ship, equipment, plant (not shown) or the like provided with the fluid piping system A. When the power supply device 12 is not operating, the switchgear AA4 is driven by the battery AA6.
Further, when the power supply device 12 is not operating, the battery AA6 drives the arithmetic unit AA3 and the communication device AA5. The arithmetic unit AA3 performs various calculations based on the detection results of the pressure sensors AA1 and AA2. The communication device AA5 transmits the detection results of the pressure sensors AA1 and AA2 and the calculation results of the arithmetic units AA3 to the communication devices of the other valves AB to AJ via an emergency communication line such as a wireless communication line. Further, the communication device AA5 receives the detection results of the pressure sensors of the other valves AB to AJ and the calculation results of the arithmetic unit via the emergency communication line.

In the example shown in FIG. 1, the central control device 11 is driven by the power supply device 12 during the operation of the power supply device 12. The communication unit 11a transmits / receives information, control signals, and the like between valves AA to AJ, pumps P1 and P2, and devices HE1 and HE2 via a main communication line such as a wired communication line. Information such as the detection results of the pressure sensors of the valves AA to AJ received by the communication unit 11a is input to the processing unit 11b. The processing unit 11b processes the information received from the valves AA to AJ, the pumps P1, P2 and the devices HE1 and HE2 (for example, processing such as identifying the leakage location), and processes the valves AA to AJ, the pumps P1, P2 and the devices HE1 and HE2. It generates a control signal to be controlled (for example, a control signal for closing a valve). The storage unit 11c stores the information received by the communication unit 11a, the processing result of the information in the processing unit 11b, the information related to the fluid piping system A shown in FIG. 1, and the like.

FIG. 3 is a diagram showing information regarding the fluid piping system A shown in FIG. 1 stored in the storage unit 11c.
In the example shown in FIG. 3, the identification information of the target valve, the identification information of the valve, pump, or device adjacent to the first side of the target valve, and the valve, pump, or device adjacent to the second side of the target valve. It is stored in the storage unit 11c in association with the identification information of the device. Specifically, the storage unit 11c stores the following information.
In the storage unit 11c, the valve AF and the pump P1 are located on the first side (right side in FIG. 1) of the target valve AA, and the valves AB and AI are located on the second side (left side in FIG. 1) of the target valve AA. That is remembered. The storage unit 11c stores that the valves AA and AI are located on the first side (right side in FIG. 1) of the target valve AB and the valve AC is located on the second side (left side in FIG. 1) of the target valve AB. Has been done. The storage unit 11c stores that the valve AB is located on the first side (right side of FIG. 1) of the target valve AC and the valve AD is located on the second side (left side of FIG. 1) of the target valve AC. There is. In the storage unit 11c, the valve AC is located on the first side (right side in FIG. 1) of the target valve AD, and the valves AE, AJ and the pump P2 are located on the second side (left side in FIG. 1) of the target valve AD. That is remembered.
In the storage unit 11c, the valves AD, AJ and the pump P2 are located on the first side (left side in FIG. 1) of the target valve AE, and the valve AF is located on the second side (right side in FIG. 1) of the target valve AE. That is remembered. The storage unit 11c stores that the valve AE is located on the first side (left side in FIG. 1) of the target valve AF and the valve AG is located on the second side (right side in FIG. 1) of the target valve AF. There is. The storage unit 11c stores that the valve AF is located on the first side (left side in FIG. 1) of the target valve AG and the valve AH is located on the second side (right side in FIG. 1) of the target valve AG. There is. In the storage unit 11c, the valve AG is located on the first side (left side in FIG. 1) of the target valve AH, and the valve AA and the pump P1 are located on the second side (right side in FIG. 1) of the target valve AH. It is remembered.
In the storage unit 11c, the valves AA and AB are located on the first side (upper side of FIG. 1) of the target valve AI, and the device HE1 is located on the second side (lower side of FIG. 1) of the target valve AI. It is remembered. In the storage unit 11c, the valves AD, AE and the pump P2 are located on the first side (upper side of FIG. 1) of the target valve AJ, and the device HE2 is located on the second side (lower side of FIG. 1) of the target valve AJ. It is remembered to do.

In the example shown in FIG. 1, the pressure drop valve specifying unit 11b1 identifies the pressure drop valve based on the detection results of the pressure sensors AA1 or the pressure sensor AA2 of the valves AA to AJ. The pressure drop valve is a valve among the valves AA to AJ in which the pressure of the fluid drops by the first threshold value or more within a predetermined time. The first threshold value is set to a value smaller than the pressure of the fluid that drops during a predetermined time when the pipes AL01 to AL18 of the fluid pipe system A are damaged. Specifically, for example, when any of the pipes AL01 to AL13 is damaged while the valves AI and AJ are closed and the valves AA to AH are open, the fluid at the positions of the valves AA to AH The first threshold is set so that the pressure drops by the first threshold or more.
The flow direction detection unit 11b2 detects the flow direction of the fluid passing through the pressure drop valves AA to AH in the fluid piping system A based on the detection results of the pressure sensors AA1 of the valves AA to AJ and the detection results of the pressure sensors AA2. To do. For example, when the pressure detected by the pressure sensor AA1 is higher than the pressure detected by the pressure sensor AA2, the flow direction detection unit 11b2 moves from the position of the pressure sensor AA1 (first side) to the position of the pressure sensor AA2 (first side). It is judged that the fluid is flowing on the 2nd side). Then, the flow direction detection unit 11b2 refers to the information about the fluid piping system A stored in the storage unit c, and detects the “counterclockwise direction of FIG. 1” as the flow direction of the fluid in the fluid piping system A.
In the example shown in FIG. 1, the pressure sensors AA1 and AA2 are used to detect the flow direction of the fluid passing through the pressure drop valve AA, but in other examples, the fluid passing through the pressure drop valve AA is used instead. In order to detect the flow direction of the pressure sensor, a sensor other than the pressure sensor such as a paddle type sensor may be used.

In the example shown in FIG. 1, the leak location identification unit 11b3 identifies the leak location of the fluid piping system A. Specifically, the leak location specifying portion 11b3 has a flow direction as a first pressure drop valve having a flow direction of the first among a plurality of pressure drop valves specified by the pressure drop valve specifying portion 11b1. A second pressure drop valve that has a second direction opposite to the first direction and is adjacent to the first pressure drop valve is specified. Further, the leak location identification portion 11b3 is a portion between the first pressure drop valve and the second pressure drop valve, and the portion where the flow in the first direction and the flow in the second direction meet is a leak. Identify it as a location.
Specifically, the flow path specifying unit 11b31 includes a first flow path through which the fluid flows in the first direction (for example, the clockwise direction in FIG. 1) from the plurality of flow paths included in the fluid piping system A. Identify a second flow path through which the fluid flows in a second direction (eg, counterclockwise in FIG. 1). Further, the point calculation unit 11b32 calculates the points attached to the pressure drop valve on the first flow path and the points attached to the pressure drop valve on the second flow path. The points related to the first flow path are calculated as positive numbers, and the points related to the second flow path are calculated as negative numbers. The absolute value of the score increases toward the downstream side of the flow path. Further, the leak location identification unit 11b3 has a first pressure drop valve having a maximum number of points (the number of points having the maximum absolute value) on the first flow path and a minimum number of points (the number of points having the maximum absolute value) on the second flow path. The location between the second pressure drop valve and the location is identified as the leak location.

FIG. 4 is a flowchart showing a process executed by the leak location identification device 1 shown in FIG.
The leak location identification device 1 executes the following processing at a timing related to a certain control cycle.
First, the processing unit 11b of the leak location identification device 1 is stored in the storage unit 11c with the current detection results of the pressure sensors AA1 and AA2 of the valves AA and the current detection results of the pressure sensors of the other valves AB to AJ. The previous detection results of the pressure sensors AA1 and AA2 of the valve AA and the previous detection results of the pressure sensors of the other valves AB to AJ are acquired (step S1).
Next, the pressure drop valve identification unit 11b1 is based on the current and previous detection results of the pressure sensors AA1 and AA2 of the valve AA and the current and previous detection results of the pressure sensors of the other valves AB to AJ, and the valves AA to AJ. Among these, a pressure drop valve in which the pressure of the fluid has dropped by the first threshold value or more is specified (step S2).
Next, the processing unit 11b determines whether or not there is a pressure drop valve (step S3). If there is no pressure drop valve, the process returns to step S1, and if there is a pressure drop valve, the process proceeds to step S4.

The processing unit 11b determines whether or not the device HE1 or the device HE2 is in operation (step S4). When the device HE1 or the device HE2 is in operation, the fluid flow associated with the operation of the device HE1 or the device HE2 exists in the fluid piping system A, and the leak location cannot be accurately identified. Therefore, the process returns to step S1. On the other hand, if the device HE1 or the device HE2 is not in operation, the process proceeds to step S5.

The flow direction detection unit 11b2 detects the flow direction of the fluid passing through the pressure drop valve in the fluid piping system A (step S5).
Next, the processing unit 11b confirms the operating state of the pumps P1 and P2 (step S6).
Next, the flow path specifying unit 11b31 has a first flow path through which the fluid flows in the first direction and a second flow path from among the plurality of flow paths included in the fluid piping system A, with the operating pump as a base point. The second flow path that flows in the direction of is specified (step S7).
Next, the score calculation unit 11b32 calculates the score attached to the pressure drop valve on the first flow path and the score attached to the pressure drop valve on the second flow path (step S8).
Next, the processing unit 11b determines whether or not the score calculation by the score calculation unit 11b32 is completed (step S9). If the score calculation by the score calculation unit 11b32 is not completed, the process returns to step S8, and if the score calculation by the score calculation unit 11b32 is completed, the process proceeds to step S10.

The leak location identification portion 11b3 is between the first pressure drop valve, which is a pressure drop valve having the maximum number of points on the first flow path, and the second pressure drop valve, which is the pressure drop valve having the minimum number of points on the second flow path. Is identified as the leaked part (step S10).
Next, the processing unit 11b outputs a control signal for closing the first pressure drop valve to the first pressure drop valve and outputs a control signal for closing the second pressure drop valve to the second pressure drop valve (step S11). ). As a result, the opening / closing device of the first pressure drop valve closes the valve body of the first pressure drop valve, and the opening / closing device of the second pressure drop valve closes the valve body of the second pressure drop valve.
Next, the processing unit 11b includes the detection result of the pressure sensor of the first pressure drop valve after the closing of the first pressure drop valve and the detection result of the pressure sensor of the second pressure drop valve after the closing of the second pressure drop valve. (Step S12).
Next, in the processing unit 11b, the pressure of the fluid at the position of the first pressure drop valve (specifically, the position on the side of the second pressure drop valve) drops by a second threshold value or more within a predetermined time, and the second pressure drop valve It is determined whether or not the pressure of the fluid at the position (specifically, the position on the side of the first pressure drop valve) has dropped by the second threshold value or more within a predetermined time (step S13). When the pressure of the fluid at the position of the first pressure drop valve drops by the second threshold value or more during the predetermined time, and the pressure of the fluid at the position of the second pressure drop valve drops by the second threshold value or more during the predetermined time. Since the leaked part was accurately identified and the separation process of the leaked part was completed, the process of FIG. 4 is terminated. On the other hand, when the pressure of the fluid at the position of the first pressure drop valve has not dropped by the second threshold value or more within the predetermined time, or when the pressure of the fluid at the position of the second pressure drop valve has not dropped by the second threshold value or more during the predetermined time, the second If it does not decrease by the threshold value or more, the leak location has not been accurately identified, and the process returns to step S6.

FIG. 5 is a diagram for explaining a specific example of the process executed by the leak location identification device 1 when the leak location AK occurs.
In the example shown in FIG. 5, when the pump P1 is operating, the pump P2 is not operating, and the devices HE1 and HE2 are stopped, a leakage point AK occurs in the pipe AL10.
Therefore, a part of the fluid from the pump P1 is pipe AL01, branch joint AN1, pipe AL02, valve AA, pipe AL03, branch joint AN2, pipe AL04, valve AB, pipe AL05, valve AC, pipe AL06, valve AD, It flows to the leakage point AK of the pipe AL10 via the pipe AL07, the branch joint AN4, the pipe AL08, the branch joint AN3, the pipe AL09 and the valve AE.
Further, another part of the fluid from the pump P1 flows to the leakage point AK of the pipe AL10 via the pipe AL01, the branch joint AN1, the pipe AL13, the valve AH, the pipe AL12, the valve AG, the pipe AL11 and the valve AF. ..
As a result, in step S2 of FIG. 4, the pressure drop valve specifying portion 11b1 identifies the valves AA to AH as pressure drop valves.

In the example shown in FIG. 5, in step S5 of FIG. 4, the pressure of the flow direction detection unit 11b2 on the right side (first side) of the valve AA is "0.40", and the pressure on the left side (second side) of the valve AA is "0.40". It is detected that the pressure of is "0.39". Further, the flow direction detection unit 11b2 indicates that the pressure on the right side (first side) of the valve AB is "0.39" and the pressure on the left side (second side) of the valve AB is "0.38". To detect. Further, the flow direction detection unit 11b2 indicates that the pressure on the right side (first side) of the valve AC is "0.38" and the pressure on the left side (second side) of the valve AC is "0.37". To detect. Further, the flow direction detection unit 11b2 indicates that the pressure on the right side (first side) of the valve AD is "0.37" and the pressure on the left side (second side) of the valve AD is "0.36". To detect. Further, the flow direction detection unit 11b2 indicates that the pressure on the left side (first side) of the valve AE is "0.36" and the pressure on the right side (second side) of the valve AE is "0.0". To detect. As a result, the flow direction detection unit 11b2 detects that the flow direction of the fluid passing through the pressure drop valves AA to AE is the first direction (counterclockwise in FIG. 5).
Further, in step S5 of FIG. 4, in the flow direction detection unit 11b2, the pressure on the right side (second side) of the valve AH is "0.40", and the pressure on the left side (first side) of the valve AH is "0". .39 ”is detected. Further, the flow direction detection unit 11b2 indicates that the pressure on the right side (second side) of the valve AG is "0.39" and the pressure on the left side (first side) of the valve AG is "0.38". To detect. Further, the flow direction detection unit 11b2 indicates that the pressure on the right side (second side) of the valve AF is "0.38" and the pressure on the left side (first side) of the valve AF is "0.0". To detect. As a result, the flow direction detection unit 11b2 determines that the flow direction of the fluid passing through the pressure drop valves AH, AG, and AF is the second direction (clockwise in FIG. 5) opposite to the first direction. To detect.

In the example shown in FIG. 5, in step S6 of FIG. 4, the processing unit 11b confirms that the pump P1 is operating and the pump P2 is not operating.
In step S7 of FIG. 4, the flow path specifying portion 11b31 states that the flow path from the branch joint AN1 to the leakage point AK via the valves AA to AE is the first flow path through which the fluid flows in the first direction. Identify. Further, the flow path specifying portion 11b31 specifies that the flow path from the branch joint AN1 to the leakage point AK via the valves AH, AG, and AF is the second flow path through which the fluid flows in the second direction.

In the example shown in FIG. 5, in step S8 of FIG. 4, the point calculation unit 11b32 calculates the points assigned to the pressure drop valves AA to AE on the first flow path. In this example, the score of the valve in the first flow path is calculated by adding "1" to the score of another valve adjacent to the upstream side of the valve. Further, the score of the valve in the second flow path shall be calculated by subtracting "1" from the score of another valve adjacent to the upstream side of the valve.
The number of valves AA located on the most upstream side of the first flow path becomes "+1". The score of the valve AB located on the downstream side of the valve AA of the first flow path is "+2", which is larger than the score of the valve AA. The score of the valve AC located on the downstream side of the valve AB of the first flow path is "+3", which is larger than the score of the valve AB. The score of the valve AD located on the downstream side of the valve AC in the first flow path is "+4", which is larger than the score of the valve AC. The score of the valve AE located on the downstream side of the valve AD of the first flow path is "+5", which is larger than the score of the valve AD.
Further, in step S8 of FIG. 4, the point calculation unit 11b32 calculates the points assigned to the pressure drop valves AH, AG, and AF on the second flow path.
The score of the valve AH located on the most upstream side of the second flow path is "-1". The score of the valve AG located on the downstream side of the valve AH in the second flow path is "-2", which is smaller than the score of the valve AH. The score of the valve AF located on the downstream side of the valve AG of the second flow path is "-3", which is smaller than the score of the valve AG.

In the example shown in FIG. 5, in step S10 of FIG. 4, the leak location specifying portion 11b3 has a maximum number of points “+5” on the first flow path (the flow path from the branch joint AN1 via the valves AA to AE). The location between the 1 pressure drop valve AE and the 2nd pressure drop valve AF having the minimum score "-3" on the second flow path (the flow path from the branch joint AN1 via the valves AH, AG, AF) , Identify the leak location AK. Further, in step S11 of FIG. 4, the switchgear of the first pressure drop valve AE closes the valve body of the first pressure drop valve AE, and the switchgear of the second pressure drop valve AF is the valve of the second pressure drop valve AF. Close your body.
In the examples shown in FIGS. 4 and 5, the leak location identification portion 11b3 identifies the leak location AK based on the scores of the pressure drop valves AA to AH, but in other examples, the leak location identification portion 11b3 reduces the pressure. The leak location AK may be identified based on the flow direction of the fluid passing through the valves AA to AH.
In this example, the leak location identification portion 11b3 identifies the pressure drop valves AA to AE in which the fluid flow direction is the first direction (counterclockwise in FIG. 5). Further, the leak location specifying portion 11b3 identifies the pressure drop valves AH, AG, and AF in which the fluid flow direction is the second direction (clockwise in FIG. 5) opposite to the first direction. Further, the leak location identification portion 11b3 is a pressure drop valve adjacent to the pressure drop valves AH, AG, and AF through which the fluid passes in the second direction among the pressure drop valves AA to AE through which the fluid passes in the first direction. Identify AA and AE. The pressure drop valve AA through which the fluid passes in the first direction is adjacent to the pressure drop valve AH through which the fluid passes in the second direction. The pressure drop valve AE through which the fluid passes in the first direction is adjacent to the pressure drop valve AF through which the fluid passes in the second direction. The leak location identification portion 11b3 is a flow in the first direction and a second of the locations between the pressure drop valve AA and the pressure drop valve AH and the locations between the pressure drop valve AE and the pressure drop valve AF. The point between the pressure drop valve AE and the pressure drop valve AF, which is the point where the flow in the direction of the above meets, is specified as the leak point AK.

When the power supply device 12 is in operation, the power supply device 12 drives the central control device 11, and the central control device 11 executes the process shown in FIG. Specifically, the central control device 11 identifies the leak location AK based on the detection results of the respective pressure sensors of the valves AA to AJ input to the central control device 11 via the main communication line.
On the other hand, when the power supply device 12 is not operating, the battery AA6 of the valve AA drives the arithmetic unit AA3 and the communication device AA5 of the valve AA. Similarly, each battery of valves AB to AJ drives each arithmetic unit and communication device of valves AB to AJ. For example, the arithmetic unit AA3 of the valve AA has a leakage location AK based on the detection results of the pressure sensors AA1 and AA2 and the pressure detection results of the valves AB to AJ input to the arithmetic unit AA3 via the emergency communication line. To identify. Instead of the arithmetic unit AA3 of the valve AA, any arithmetic unit of the valves AB to AJ may identify the leak location AK.

In this embodiment, since the leak location identification device 1 executes the above-described processing, the leak location AK of the fluid piping system A can be identified without the need for an operator to take action, and the fluid leakage at the leak location AK can be prevented. You can stop it.

The present invention is not limited to the configuration of the above-described embodiment, and the design can be changed without departing from the gist thereof.
For example, in the above-described embodiment, the leak location identification device 1 is applied to the fluid piping system A having the configurations shown in FIGS. 1 and 5, but in another example, the leak location identification device 1 has an arbitrary shape. It can be applied to the fluid piping system A of.

1 Leakage location identification device 11 Central control device 11a Communication unit 11b Processing unit 11b1 Pressure drop valve identification unit 11b2 Flow direction detection unit 11b3 Leakage location identification unit 11b31 Flow path identification unit 11b32 Point calculation unit 11c Storage unit 12 Power supply unit A Fluid piping system AL01 Piping AL02 Piping AL03 Piping AL04 Piping AL05 Piping AL06 Piping AL07 Piping AL08 Piping AL09 Piping AL10 Piping AL11 Piping AL12 Piping AL13 Piping AL14 Piping AL15 Piping AL16 Piping AL17 Piping AL18 Piping AP1 Pump AP2 Pump AN1 Branching AN2 Branch joint AK Leakage point AA Valve AA1 Pressure sensor AA2 Pressure sensor AA3 Computing device AA4 Opening and closing device AA5 Communication device AA6 Battery AB Valve AC valve AD Valve AE valve AF valve AG valve AH valve AI valve AJ valve HE1 Equipment HE2 Equipment

Claims (6)

A leak location identification device that identifies leak locations in a fluid piping system equipped with multiple valves.
Among the plurality of valves, a pressure drop valve specifying portion that specifies a pressure drop valve that is a valve in which the fluid pressure at the valve position has dropped by the first threshold value or more.
A flow direction detection unit that detects the flow direction of the fluid passing through the pressure drop valve, and
A first pressure drop valve whose flow direction is the first direction and a second direction whose flow direction is opposite to the first direction and adjacent to the first pressure drop valve. The location between the two pressure drop valves, where the flow in the first direction and the flow in the second direction meet, is a leak location specifying portion that identifies the leak location.
Equipped with a,
The leak location identification part is
A flow path specifying portion that specifies a first flow path through which the fluid flows in the first direction and a second flow path through which the fluid flows in the second direction.
A score calculation unit for calculating the score attached to the pressure drop valve on the first flow path and the score attached to the pressure drop valve on the second flow path is provided.
The score increases toward the downstream side of the first direction and increases toward the upstream side of the second direction.
The leak location identification part is
The location between the first pressure drop valve having the maximum number of points on the first flow path and the second pressure drop valve having the minimum number of points on the second flow path is specified as the leak point . Leakage location identification device. Each of the plurality of valves
A first pressure detection unit that detects the pressure of the fluid on one side of the valve body,
A second pressure detecting unit for detecting the pressure of the fluid on the other side of the valve body is provided.
The pressure drop valve specific part is
The pressure drop valve is identified based on the pressure of the fluid detected by the first pressure detector or the second pressure detector.
The flow direction detection unit is
The pressure of the fluid detected by the first pressure detector, based on the pressure of the fluid detected by the second pressure detector, detects the direction of flow, leakage portion of claim 1 Specific device. Further provided with a central control device having a communication unit and a power supply device,
Each of the plurality of valves includes an arithmetic unit, a communication device, and a battery.
During operation of the power supply device
The power supply drives the central control unit and
The leak location is based on the detection results of the first pressure detection unit and the second pressure detection unit of the plurality of valves input to the central control unit via the first communication line. Identify and
When the power supply device is not operating,
The battery drives the arithmetic unit and the communication device.
The detection result of the first pressure detection unit and the second pressure detection unit of each of the plurality of valves input by the arithmetic unit to the arithmetic unit via a second communication line different from the first communication line. The leak location identification device according to claim 2 , wherein the leak location is identified based on the above. A fluid piping system with multiple valves and
The leak location identification device according to claim 1 or 2,
Fluid supply system with. A ship comprising the fluid supply system according to claim 4. A leak location identification method for identifying leak locations in fluid piping systems with multiple valves.
Among the plurality of valves, a pressure drop valve specifying step for specifying a pressure drop valve, which is a valve in which the fluid pressure at the valve position has dropped by the first threshold value or more,
A flow direction detection step for detecting the flow direction of the fluid passing through the pressure drop valve, and
A first pressure drop valve whose flow direction is the first direction and a second direction whose flow direction is opposite to the first direction and adjacent to the first pressure drop valve. The leak location identification step for identifying the location between the two pressure drop valves where the flow in the first direction and the flow in the second direction meet is the leak location.
Equipped with a,
In the leak location identification process,
The first flow path through which the fluid flows in the first direction and the second flow path through which the fluid flows in the second direction are specified, and at the same time,
The score given to the pressure drop valve on the first flow path and the score given to the pressure drop valve on the second flow path were calculated.
The score increases toward the downstream side of the first direction and increases toward the upstream side of the second direction.
In the leak location identification process,
The location between the first pressure drop valve having the maximum number of points on the first flow path and the second pressure drop valve having the minimum number of points on the second flow path is specified as the leak point . How to identify the leak location.

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