JP2015148490A - Foreign matter removal/recovery device, cooling facility, and atomic energy facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove and recover foreign matter before it reaches a downstream system or apparatus.SOLUTION: Provided is a foreign matter removal/recovery device 1 for removing and recovering foreign matter included in a liquid, the foreign matter removal/recovery device 1 comprising: a narrow part 1A provided in the middle of a supply tube 121Bb to which a liquid is supplied; a differential pressure gauge 1B for detecting a pressure difference between locations before and after the narrow part 1A; a reversion part 1C, interposed in the supply tube 121Bb, for reversing a fluid from normal flow to backflow relative to the narrow part 1A; a downstream strainer 1E, provided in the reversion part 1C, through which can the fluid past the narrow part 1A pass through in at least the reversion to backflow; and a control part 1D for controlling the reversion part 1C and causing the flow of the fluid relative to the narrow part 1A to be reversed from forward to reverse when the differential pressure detected by the differential pressure gauge 1B exceeds a threshold.

Description

  The present invention relates to a foreign matter removal and collection device that removes and collects foreign matter contained in a fluid, a cooling facility to which the foreign matter removal and collection device is applied, and a nuclear facility to which the cooling facility is applied.

  Conventionally, for example, the cooling system facility described in Patent Document 1 is directed to a cooling system facility that uses seawater or the like, and suppresses foreign matters contained in seawater from adhering to the heat exchanger of the cooling system facility. The purpose is to maintain the heat removal performance. This cooling system facility uses a seawater-based inlet / outlet header on the seawater side of the heat exchanger as an input signal in a cooling system facility using seawater, such as a signal for monitoring the heat removal performance of the heat exchanger or a switching signal determined by the operator of the facility. A measurement control system for switching between and a flow path switching valve. Then, when foreign matter contained in seawater adheres to the tube plate part of the inlet header of the heat exchanger and detects that the heat removal performance has deteriorated, or when the operator determines that the heat removal performance is necessary, the flow path switching Repeat the operation to switch the coolant inlet / outlet header of the heat exchanger, reverse the flow of seawater, and remove the foreign matter adhering to the tube plate part that was the inlet side header before switching by seawater Drain outside the heat exchanger.

JP-A-7-305997

  The cooling system facility described in Patent Document 1 described above reverses the flow of seawater in the heat exchanger in order to prevent foreign matters contained in the seawater from adhering to the heat exchanger. For this reason, a foreign material will distribute | circulate the inside of the heat exchanger tube of a heat exchanger, and there exists a possibility that a heat exchanger tube may be blocked or damaged with a foreign material.

  The present invention solves the above-mentioned problems, and when a foreign substance is mixed in the fluid, the foreign substance removing and collecting apparatus and cooling equipment capable of removing and collecting the foreign substance before reaching a downstream system or device. And to provide nuclear facilities.

  In order to achieve the above-mentioned object, the foreign matter removal and collection apparatus of the present invention is a foreign matter removal and collection device for removing and collecting foreign matters contained in a fluid, and is provided in the middle of a supply pipe to which fluid is supplied. A narrowed portion, a differential pressure gauge for detecting a pressure difference before and after the narrow portion, an inversion portion that is interposed in the supply pipe and reverses a fluid from a normal flow to a reverse flow with respect to the narrow portion, and the inversion portion And when the pressure difference detected by the differential pressure gauge exceeds a predetermined threshold, the reversing unit is controlled to control the reversing unit. And a control unit that reverses the flow of the fluid to the narrow part.

  According to this foreign matter removal and recovery apparatus, when the pressure difference detected before and after the narrowed portion detected by the differential pressure gauge exceeds a threshold, the flow of the fluid to the narrowed portion is reversed from the normal flow to the reverse flow by controlling the reversing portion, In order to pass the fluid that has passed through the narrow part to the downstream strainer when reversing to the reverse flow, the clogging of the foreign substance in the narrow part is automatically detected to remove the foreign substance from the narrow part, and the removed foreign substance is removed from the downstream strainer. Can be recovered. In particular, this foreign matter removing and collecting apparatus collects foreign matter in the middle of the supply pipe, thereby preventing a situation where the foreign matter is circulated to a system or device downstream of the supply pipe. As a result, it is possible to prevent clogging and breakage of downstream systems and devices due to foreign matter contamination.

  Moreover, in the foreign material removal and collection apparatus of the present invention, a plurality of the downstream strainers are provided in parallel, and the control unit controls the respective downstream strainers to automatically and selectively pass the fluid.

  According to this foreign matter removing and collecting apparatus, since a plurality of downstream strainers arranged in parallel are automatically and selectively used, even if one downstream strainer is clogged with collected foreign matter, the other downstream strainer can collect foreign matters. Foreign substances can be removed and recovered without stopping the supply of fluid to the downstream system and equipment. In addition, when one downstream strainer is used, maintenance personnel must clean and restore at the installation location where the downstream strainer is located each time clogging occurs. By selectively using it, the frequency of cleaning work can be reduced and the burden on maintenance personnel can be reduced.

  The foreign matter removing and collecting apparatus of the present invention is characterized by having a check valve that regulates the flow direction of the fluid to the downstream strainer during forward and reverse reversal by the reversing unit.

  According to this foreign matter removal and collection apparatus, by defining the flow direction of the fluid to the downstream strainer by a static mechanism such as a check valve, the valve mechanism that mechanically switches as a dynamic device, its drive source and control device, etc. Foreign material can be reliably recovered from the downstream strainer without relying on it.

  The foreign matter removal and recovery apparatus of the present invention is a foreign matter removal and recovery device for removing and recovering foreign matters contained in a fluid, the narrow portion provided in the middle of a supply pipe to which a fluid is supplied, When the fluid is reversed from the normal flow to the reverse flow with respect to the narrow portion, the downstream strainer that can pass the fluid that has passed through the narrow portion, and the reverse that defines the flow direction of the fluid to the downstream strainer when the fluid is forward and reverse reversed And a stop valve.

  According to this foreign matter removing and collecting apparatus, the reversing part is controlled to reverse the flow of the fluid to the narrow part from the normal flow to the reverse flow, and when reversing to the reverse flow, the fluid passing through the narrow part is passed to the downstream strainer. Can be removed from the narrow portion, and the removed foreign matter can be recovered by the downstream strainer. In addition, this foreign matter removing and collecting apparatus can prevent a situation where foreign matters are circulated in a system or equipment downstream of the supply pipe by collecting foreign matters in the middle of the supply pipe. As a result, it is possible to prevent clogging and breakage of downstream systems and devices due to foreign matter contamination. In particular, according to this foreign matter removal and collection apparatus, a valve mechanism that mechanically switches as a dynamic device, its drive source, and control device by regulating the flow direction of the fluid to the downstream strainer by a static mechanism such as a check valve Foreign matter can be reliably recovered from the downstream strainer without depending on the above.

  Further, the foreign matter removing and collecting apparatus of the present invention is characterized by having an upstream strainer through which the fluid before passing through the narrowed portion can pass in the reverse flow.

  According to this foreign matter removing and collecting apparatus, when the upstream strainer is provided, when the reverse flow is reversed, the foreign matter mixed in the fluid reaching the narrow portion is collected by the upstream strainer. You can prevent clogging.

  In order to achieve the above-described object, a cooling facility according to the present invention is a cooling facility including a heat exchanger that performs heat exchange between a fluid flowing through a cooling target and a coolant, and the heat exchanger includes: The foreign matter removing and collecting apparatus is applied to a supply pipe for supplying a coolant.

  According to this cooling equipment, it is possible to automatically detect clogging of foreign matter in the narrow portion, remove the foreign matter from the narrow portion, and collect the removed foreign matter with the downstream strainer. In particular, this foreign matter removing and collecting apparatus can prevent the foreign matter from flowing through the heat exchanger by collecting the foreign matter in the middle of the supply pipe that supplies the coolant to the heat exchanger. As a result, it is possible to prevent the heat exchanger from being clogged or damaged due to contamination.

  In order to achieve the above-described object, the nuclear power facility of the present invention is a nuclear power facility that generates a high-temperature fluid by heat generated in a nuclear reactor and sends it by piping, and uses the high-temperature fluid. The cooling equipment is applied to the cooling of the object.

  According to this nuclear power facility, it is possible to automatically detect clogging of foreign matter in the narrow portion, remove the foreign matter from the narrow portion, and collect the removed foreign matter with the downstream strainer. In particular, this foreign matter removing and collecting apparatus can prevent the foreign matter from flowing through the heat exchanger by collecting the foreign matter in the middle of the supply pipe that supplies the coolant to the heat exchanger. As a result, it is possible to prevent the heat exchanger from being clogged or damaged due to contamination. Moreover, in a nuclear facility, when the heat exchanger tube of a heat exchanger is damaged, there is a possibility that high-temperature fluid exposed to radiation enters the coolant and leaks to the outside of the heat exchanger. In order to prevent clogging or breakage of the heat exchanger due to foreign matter contamination, it is possible to prevent an event in which high-temperature fluid exposed to radiation enters the coolant and leaks to the outside of the heat exchanger.

  According to the present invention, when foreign matter or the like is mixed in the fluid, the foreign matter can be removed and collected before reaching a downstream system or device.

FIG. 1 is a schematic configuration diagram of an example of a nuclear facility according to an embodiment of the present invention. FIG. 2 is a schematic configuration diagram of a cooling facility according to the embodiment of the present invention. FIG. 3 is a configuration diagram of a basic form of the foreign matter removing and collecting apparatus according to the first embodiment of the present invention. FIG. 4 is a configuration diagram of the foreign matter removing and collecting apparatus according to the first embodiment of the present invention. FIG. 5 is a configuration diagram showing the operation of the foreign matter removal and collection apparatus according to Embodiment 1 of the present invention. FIG. 6 is a configuration diagram showing the operation of the foreign matter removal and collection apparatus according to Embodiment 1 of the present invention. FIG. 7 is a configuration diagram showing another form of the foreign matter removing and collecting apparatus according to Embodiment 1 of the present invention. FIG. 8 is a configuration diagram illustrating another operation of the foreign matter removal and collection apparatus according to Embodiment 1 of the present invention. FIG. 9 is a configuration diagram showing another operation of the foreign matter removal and collection apparatus according to Embodiment 1 of the present invention. FIG. 10 is a configuration diagram of a foreign matter removing and collecting apparatus according to Embodiment 2 of the present invention. FIG. 11 is a configuration diagram showing the operation of the foreign matter removal and collection apparatus according to Embodiment 2 of the present invention. FIG. 12 is a configuration diagram showing the operation of the foreign matter removal and collection apparatus according to Embodiment 2 of the present invention. FIG. 13: is a block diagram which shows the other form of the foreign material removal collection | recovery apparatus concerning Embodiment 2 of this invention. FIG. 14 is a configuration diagram showing another operation of the foreign matter removal and collection apparatus according to Embodiment 2 of the present invention. FIG. 15 is a configuration diagram of a foreign matter removing and collecting apparatus according to Embodiment 3 of the present invention. FIG. 16 is a configuration diagram illustrating the operation of the foreign matter removal and collection apparatus according to Embodiment 3 of the present invention. FIG. 17 is a configuration diagram showing the operation of the foreign matter removal and collection apparatus according to Embodiment 3 of the present invention. FIG. 18 is a configuration diagram showing the operation of the foreign matter removal and collection apparatus according to Embodiment 3 of the present invention. FIG. 19 is a configuration diagram showing another form of the foreign matter removing and collecting apparatus according to Embodiment 3 of the present invention. FIG. 20 is a configuration diagram showing another operation of the foreign matter removal and collection apparatus according to Embodiment 3 of the present invention. FIG. 21 is a configuration diagram of a foreign matter removing and collecting apparatus according to Embodiment 4 of the present invention. FIG. 22 is a configuration diagram showing the operation of the foreign matter removal and collection apparatus according to Embodiment 4 of the present invention. FIG. 23 is a configuration diagram showing the operation of the foreign matter removal and collection apparatus according to Embodiment 4 of the present invention. FIG. 24 is a configuration diagram showing another form of the foreign matter removing and collecting apparatus according to Embodiment 4 of the present invention. FIG. 25 is a configuration diagram showing another operation of the foreign substance removal / recovery device according to Embodiment 4 of the present invention. FIG. 26 is a configuration diagram of a foreign matter removing and collecting apparatus according to Embodiment 5 of the present invention. FIG. 27 is a configuration diagram showing the operation of the foreign matter removal and collection apparatus according to Embodiment 5 of the present invention. FIG. 28 is a configuration diagram illustrating the operation of the foreign matter removal and collection apparatus according to the fifth embodiment of the present invention. FIG. 29 is a configuration diagram showing the operation of the foreign matter removal and collection apparatus according to Embodiment 5 of the present invention. FIG. 30 is a configuration diagram showing another form of the foreign matter removing and collecting apparatus according to Embodiment 5 of the present invention. FIG. 31 is a configuration diagram illustrating another operation of the foreign substance removal / recovery device according to the fifth embodiment of the present invention.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

  The foreign matter removal and collection apparatus according to the present embodiment removes and collects foreign matter before it reaches a downstream system or device when foreign matter is mixed in the fluid. And prevent damage. Examples of downstream systems and equipment include pressure reducing orifices, valves, instrumentation, and strainers that may cause blockage. In this embodiment, a heat exchanger is taken as an example of such a device, and a nuclear facility to which the heat exchanger is applied as an example is taken as an example.

  FIG. 1 is a schematic configuration diagram of an example of a nuclear facility according to the present embodiment. The nuclear facility shown in FIG. 1 is a pressurized water reactor (PWR). In this nuclear power facility, a reactor pressure vessel 101, a pressurizer 102, a steam generator 103, and a primary cooling water pump 104 are sequentially connected by a primary cooling water pipe 105 in a reactor containment vessel 100 to circulate primary cooling water. A path (primary cooling system) is configured.

  The reactor pressure vessel 101 stores therein a plurality of fuel assemblies 101a, which are cores, in a sealed state, and a vessel body 101b and a vessel lid 101c mounted on the upper portion thereof so that the fuel assemblies 101a can be inserted and removed. It is comprised by. The container lid 101c is provided so as to be openable and closable with respect to the container main body 101b. The container main body 101b has a cylindrical shape with an upper opening and a lower hemispherical shape that is closed, and an inlet-side nozzle 101d and an outlet-side nozzle 101e that supply and discharge light water as primary cooling water are provided at the upper part. It has been. The outlet side nozzle 101e is connected to the primary cooling water pipe 105 so as to communicate with the inlet side water chamber 103a of the steam generator 103. The inlet side nozzle 101d is connected to the primary cooling water pipe 105 so as to communicate with the outlet side water chamber 103b of the steam generator 103.

  The steam generator 103 is provided with an inlet-side water chamber 103a and an outlet-side water chamber 103b partitioned by a partition plate 103c in a lower part formed in a hemispherical shape. The inlet side water chamber 103a and the outlet side water chamber 103b are separated from the upper side of the steam generator 103 by a tube plate 103d provided on the ceiling portion. On the upper side of the steam generator 103, an inverted U-shaped heat transfer tube 103e is provided. Each end of the heat transfer tube 103e is supported by the tube plate 103d so as to connect the inlet side water chamber 103a and the outlet side water chamber 103b. The inlet-side water chamber 103a is connected to the inlet-side primary cooling water pipe 105, and the outlet-side water chamber 103b is connected to the outlet-side primary cooling water pipe 105. In addition, the steam generator 103 is connected to the upper side upper end partitioned by the tube plate 103d, the outlet side secondary cooling water pipe 106a, and the upper side part is connected to the inlet side secondary cooling water pipe 106b. Has been.

  Further, in the nuclear power facility, the steam generator 103 is connected to the steam turbine 107 through the secondary cooling water pipes 106a and 106b outside the reactor containment vessel 100, and the circulation path of the secondary cooling water (secondary cooling system). Is configured.

  The steam turbine 107 includes a high-pressure turbine 108 and a low-pressure turbine 109, and a generator 110 is connected thereto. In addition, the high-pressure turbine 108 and the low-pressure turbine 109 are connected to a moisture separation heater 111 that is branched from the secondary cooling water pipe 106a. The secondary cooling water pipe 106 a is provided with a steam isolation valve (open / close valve) 119 on the way from the steam generator 103 to the high pressure turbine 108 and the low pressure turbine 109. The steam isolation valve 119 is closed in an emergency or the like, and the steam from the steam generator 103 to the high pressure turbine 108 and the low pressure turbine 109 is isolated. The low pressure turbine 109 is connected to the condenser 112. The condenser 112 is connected to the secondary cooling water pipe 106b. The secondary cooling water pipe 106b is connected to the steam generator 103 as described above, and reaches from the condenser 112 to the steam generator 103, and the condensate pump 113, the low-pressure feed water heater 114, the deaerator 115, and the main feed water pump. 116, a high-pressure feed water heater 117 and a main feed water valve (open / close valve) 118 are provided.

  Therefore, in the nuclear power facility, the primary cooling water is heated in the reactor pressure vessel 101 to become a high temperature and a high pressure, and is pressurized by the pressurizer 102 to maintain the pressure constant, while the steam is passed through the primary cooling water pipe 105. It is supplied to the generator 103. In the steam generator 103, heat exchange between the primary cooling water and the secondary cooling water is performed, whereby the secondary cooling water evaporates and becomes steam. The cooled primary cooling water after heat exchange is recovered to the primary cooling water pump 104 side via the primary cooling water pipe 105 and returned to the reactor pressure vessel 101. On the other hand, the secondary cooling water converted into steam by heat exchange is supplied to the steam turbine 107. In connection with the steam turbine 107, the moisture separator / heater 111 removes moisture from the exhaust from the high-pressure turbine 108, further heats it to an overheated state, and then sends it to the low-pressure turbine 109. The steam turbine 107 is driven by the steam of the secondary cooling water, and the power is transmitted to the generator 110 to generate power. Steam used for driving the turbine is discharged to the condenser 112. The condenser 112 exchanges heat between the cooling water (for example, seawater) taken by the pump 112b through the intake pipe 112a and the steam discharged from the low-pressure turbine 109, and condenses the steam to produce a low-pressure saturated liquid. Return to. The cooling water used for heat exchange is discharged from the drain pipe 112c. Further, the condensed saturated liquid becomes secondary cooling water, and is sent out of the condenser 112 by the condensate pump 113 through the secondary cooling water pipe 106b. Further, the secondary cooling water passing through the secondary cooling water pipe 106b is heated by the low-pressure feed water heater 114, for example, by the low-pressure steam extracted from the low-pressure turbine 109, and dissolved oxygen and non-condensed gas (ammonia gas) in the deaerator 115. After the impurities such as) are removed, the water is fed by the main feed pump 116 and heated by the high-pressure steam extracted from the high-pressure turbine 108 by the high-pressure feed water heater 117 and then returned to the steam generator 103. Here, a system for supplying secondary cooling water to the steam generator 103 is referred to as a main water supply system. In the main water supply system, the main water supply pump 116, the main water supply valve 118, and the like are controlled in order to maintain the water level of the secondary cooling water of the steam generator 103.

  In addition, although the nuclear facility mentioned above demonstrated the pressurized water reactor (PWR: Pressurized Water Reactor), it is not this limitation. For example, although not clearly shown in the figure, a nuclear facility using a boiling water reactor (BWR) may be used.

  FIG. 2 is a schematic configuration diagram of the cooling facility according to the present embodiment. The cooling facility of the present embodiment is applied to the cooling of a predetermined cooling target 120 that needs to be cooled in the above-described nuclear facility, for example, in a primary cooling system, a secondary cooling system, a main water supply system, or the like. This cooling facility has a heat exchanger 121. The heat exchanger 121 includes a fluid circulation path 121A that circulates the fluid that circulates in the cooling target 120, and a coolant circulation path 121B that circulates the coolant, and the fluid and cooling circulated through the circulation paths 121A and 121B. Heat exchange with the material. The fluid circulation path 121 </ b> A includes, for example, a supply pipe 121 </ b> Aa that supplies a fluid flowing to the cooling target 120 to the casing of the heat exchanger 121, and a discharge pipe 121 </ b> Ab that discharges the fluid from the casing and returns it to the cooling target 120. . The supply pipe 121Aa is provided with a pump P1. In the coolant circulation path 121B, for example, a supply pipe 121Bb is connected to one end side of a heat transfer pipe 121Ba provided in the casing, and a discharge pipe 121Bc is connected to the other end side. The supply pipe 121Bb and the discharge pipe 121Bc are connected to the sea and river so as to supply and discharge seawater and river water, which are liquid coolants. The supply pipe 121Bb is provided with the foreign substance removal / collection device 1 of the present embodiment, and the pump P2 is provided on the heat exchanger 121 side of the foreign substance removal / collection apparatus 1. Therefore, in this cooling facility, by driving the pumps P1 and P2, the fluid of the cooling target 120 is circulated through the fluid circulation path 121A, and the coolant is supplied to the coolant circulation path 121B. Heat exchange with the.

[Embodiment 1]
FIG. 3 is a configuration diagram of a basic form of the foreign substance removal / recovery device according to the present embodiment, FIG. 4 is a configuration diagram of the foreign matter removal / recovery apparatus according to the present embodiment, and FIGS. 5 and 6 illustrate the present embodiment. FIG. 7 is a block diagram showing another embodiment of the foreign substance removal / collection device according to the present embodiment, and FIGS. 8 and 9 show the configuration of this embodiment. It is a block diagram which shows other operation | movement of the foreign material removal collection | recovery apparatus which concerns.

  As shown in FIG. 3, the foreign substance removal / recovery device 1 of the present embodiment is disposed upstream to supply a liquid coolant (fluid) to a heat exchanger 121 that is a downstream device. The foreign substance removal / recovery device 1 includes, as its basic form, an orifice 1A that is a narrow portion, a differential pressure gauge 1B, a reversing unit 1C, and a control unit 1D.

  The orifice 1A is used as a flow rate adjusting means for adjusting the flow rate of the coolant supplied to the heat exchanger 121 in the supply pipe 121Bb, and is provided in the middle of the orifice pipe 1Aa.

  The differential pressure gauge 1B detects a pressure difference before and after the orifice 1A, and is provided in the differential pressure gauge pipe 1Ba for measuring the differential pressure of the orifice 1A in the orifice pipe 1Aa.

  The reversing unit 1C is interposed in the supply pipe 121Bb and reverses the flow of the coolant with respect to the orifice 1A. The reversing unit 1C includes a first pipe 1Ca and a second pipe 1Cb so that the supply pipe 121Bb is once divided into two directions in the middle of the supply pipe 121Bb. An orifice pipe 1Aa is connected between the first pipe 1Ca and the second pipe 1Cb. A first on-off valve 1Cc is provided between the first pipe 1Ca and the upstream side (sea or river side) of the supply pipe 121Bb and the orifice pipe 1Aa. Further, the first on-off valve 1Cd is provided between the first pipe 1Ca and the downstream side (the heat exchanger 121 side) of the supply pipe 121Bb and the orifice pipe 1Aa. The second pipe 1Cb is provided with a third on-off valve 1Ce while connected to the upstream side (the sea or river side) of the supply pipe 121Bb and the orifice pipe 1Aa. Furthermore, the fourth pipe 1Cf is provided between the second pipe 1Cb and the downstream side of the supply pipe 121Bb (the heat exchanger 121 side) and the orifice pipe 1Aa.

  The control unit 1D is an arithmetic device including a CPU (Central Processing Unit), a storage device, and the like, and includes a differential pressure gauge 1B, a first on-off valve 1Cc, a second on-off valve 1Cd, a third on-off valve 1Ce, and a fourth on-off valve. 1Cf. The controller 1D opens the first on-off valve 1Cc and the fourth on-off valve 1Cf, and closes the second on-off valve 1Cd and the third on-off valve 1Ce, so that the orifice pipe 1Aa is connected to the orifice pipe 1Aa from the right in FIG. A coolant is circulated on the left to form a flow (positive flow) that passes through the orifice 1A. On the other hand, the control unit 1D closes the first on-off valve 1Cc and the fourth on-off valve 1Cf and opens the second on-off valve 1Cd and the third on-off valve 1Ce, so that the orifice pipe 1Aa in FIG. A coolant is circulated from left to right to form a flow (reverse flow) that passes through the orifice 1A. The control unit 1D is connected to the differential pressure gauge 1B. That is, the control unit 1D acquires the pressure difference before and after the orifice 1A detected by the differential pressure gauge 1B. The control unit 1D sets in advance a pressure difference range before and after the orifice 1A when the orifice 1A adjusts the flow rate of the coolant to an appropriate range, and the lower limit value of the pressure difference range is set as a threshold value. Stored in advance.

  In contrast to the basic form shown in FIG. 3, the foreign substance removal / recovery device 1 of the present embodiment includes a downstream strainer 1E as shown in FIG. The downstream strainer 1E is provided in the reversing unit 1C so that the coolant passing through the orifice 1A can pass through when reversing to the normal flow. The upstream side of the downstream strainer 1E is connected to the middle of the strainer upstream pipe 1Ea. The strainer upstream pipe 1Ea is between the first pipe 1Ca and the second pipe 1Cb of the reversing unit 1C, between the orifice pipe 1Aa and the second on-off valve 1Cd, and between the orifice pipe 1Aa and the fourth on-off valve 1Cf. Connected between. A first three-way valve 1Eb is provided at a portion where the strainer upstream pipe 1Ea is connected to the first pipe 1Ca, and a second three-way valve 1Ec is provided at a portion where the strainer upstream pipe 1Ea is connected to the second pipe 1Cb. Yes. Further, the downstream strainer 1E is downstream of the first piping 1Ca and the second piping 1Cb of the reversing unit 1C via the strainer downstream piping 1Ed, and downstream of the supply pipe 121Bb (on the heat exchanger 121 side). It is connected to the. The strainer downstream pipe 1Ed is provided with a check valve 1Ee for preventing the coolant from flowing back to the downstream strainer 1E.

  The first three-way valve 1Eb and the second three-way valve 1Ec are connected to the control unit 1D. Then, the control unit 1D acquires the pressure difference before and after the orifice 1A detected by the differential pressure gauge 1B, and when the pressure difference exceeds (below) the threshold value, the above-described on-off valves 1Cc, 1Cd, 1Ce, 1Cf And each three-way valve 1Eb and 1Ec is controlled, and the flow of a coolant is reversely reversed.

  The operation of the foreign substance removal / recovery device 1 of the present embodiment will be described with reference to FIGS. Here, the operation of the foreign substance removal / collection apparatus 1 shown in FIG. 5 is assumed to be normal, and the operation of the foreign substance removal / collection apparatus 1 shown in FIG. 6 is assumed to be abnormal. The normal state means that the flow rate of the coolant is adjusted to an appropriate range by the orifice 1A, and the control unit 1D determines that the pressure difference acquired from the differential pressure gauge 1B is within the appropriate range. In addition, the abnormal time means that the flow rate of the coolant is not adjusted to an appropriate range by the orifice 1A, and foreign matter (floating matter, aquatic organisms, etc.) mixed in the coolant that is seawater or river water is the orifice 1A. The controller 1D determines that the pressure difference acquired from the differential pressure gauge 1B has fallen below the lower limit (threshold value) of the appropriate range.

  In the normal state, as shown in FIG. 5, the control unit 1D opens the first on-off valve 1Cc and the fourth on-off valve 1Cf, closes the second on-off valve 1Cd and the third on-off valve 1Ce, The downstream strainer 1E side of each three-way valve 1Eb, 1Ec is closed. As a result, the coolant flowing through the supply pipe 121Bb becomes a positive flow that passes through the orifice 1A from right to left in FIG. 5, and is supplied to the heat exchanger 121 without passing through the downstream strainer 1E.

  On the other hand, at the time of abnormality, as shown in FIG. 6, the controller 1D closes the first on-off valve 1Cc and the fourth on-off valve 1Cf, and opens the second on-off valve 1Cd and the third on-off valve 1Ce. At the same time, the second on-off valve 1Cd side of the first three-way valve 1Eb is closed, and the downstream strainer 1E side of the second three-way valve 1Ec is closed. As a result, the coolant flowing through the supply pipe 121Bb is made a reverse flow that passes through the orifice 1A from the left to the right in FIG. 6, and is supplied to the heat exchanger 121 through the downstream strainer 1E. For this reason, the foreign matter is removed from the orifice 1A and collected by the downstream strainer 1E.

  Thereafter, when the pressure difference acquired from the differential pressure gauge 1B falls within an appropriate range, the control unit 1D returns to the normal operation in FIG. During this normal operation, the operator removes the foreign matter collected by the downstream strainer 1E.

  As described above, the foreign substance removal / recovery device 1 of the present embodiment includes an orifice (narrow portion) 1A provided in the middle of the supply pipe 121Bb to which a fluid is supplied, and a differential pressure gauge 1B that detects a pressure difference before and after the orifice 1A. And a reversing part 1C that is interposed in the supply pipe 121Bb and reverses the coolant (fluid) for the orifice 1A from the normal flow to the reverse flow, and the reversal part 1C that is provided in the reversing part 1C passes through the orifice 1A in the reverse flow. A possible downstream strainer 1E, and a control unit 1D that controls the reversing unit 1C to reverse the flow of the coolant with respect to the orifice 1A when the pressure difference detected by the differential pressure gauge 1B exceeds a predetermined threshold; Is provided.

  According to the foreign substance removal / recovery device 1, when the pressure difference across the orifice 1A detected by the differential pressure gauge 1B exceeds a threshold value, the reversing unit 1C is controlled to change the coolant flow to the orifice 1A from the normal flow to the reverse flow. In order to pass the coolant passing through the orifice 1A to the downstream strainer 1E when reversing to the reverse flow, the clogging of the foreign matter in the orifice 1A is automatically detected and the foreign matter is removed from the orifice 1A. The removed foreign matter can be collected by the downstream strainer 1E. In particular, the foreign substance removal / recovery device 1 collects foreign substances in the middle of the supply pipe 121Bb, thereby preventing a situation where foreign substances are circulated to a system or device downstream of the supply pipe 121Bb. As a result, it is possible to prevent clogging and breakage of downstream systems and devices due to foreign matter contamination.

  In addition, as shown in FIG. 7, it is preferable that the foreign material removal collection | recovery apparatus 1 has the upstream strainer 1F which can pass the coolant before passing through the orifice 1A in the reversal to a reverse flow. Specifically, the upstream strainer 1F is provided on the third opening / closing valve 1Ce side with respect to the connection portion of the second piping 1Cb with the orifice piping 1Aa, on the front side or the rear side of the third opening / closing valve 1Ce. Alternatively, the upstream strainer 1F is provided on the second pipe 1Cb side with respect to the connection portion between the orifice pipe 1Aa and the differential pressure gauge pipe 1Ba.

  In this way, by providing the upstream strainer 1F, when the reverse flow as shown in FIG. 6 is reversed, foreign matter mixed in the coolant reaching the orifice 1A is collected by the upstream strainer 1F. It is possible to prevent the orifice 1A from being clogged with foreign matter.

  By the way, the foreign substance removal / recovery device 1 of the present embodiment has the first pipe 1Ca, the second pipe 1Cb, the on-off valves 1Cc, 1Cd, 1Ce, 1Cf and the reversing section 1C with the orifice 1A and the downstream strainer 1E as the center. The three-way valves 1Eb and 1Ec are arranged symmetrically.

  That is, as shown in FIG. 8, in contrast to the operation mode shown in FIG. 5, in a normal time, the control unit 1D closes the first on-off valve 1Cc and the fourth on-off valve 1Cf and sets the second on-off valve 1Cd. The third on-off valve 1Ce is opened, and the downstream strainer 1E side of each of the three-way valves 1Eb, 1Ec is closed. As a result, the coolant flowing through the supply pipe 121Bb becomes a positive flow that passes through the orifice 1A from the left to the right in FIG. 8 and reversely to FIG. 5, and does not pass through the downstream strainer 1E. 121 is supplied.

  On the other hand, as shown in FIG. 9, in contrast to the operation mode shown in FIG. 6, at the time of abnormality, the control unit 1D opens the first on-off valve 1Cc and the fourth on-off valve 1Cf and opens the second on-off valve 1Cd. The third on-off valve 1Ce is closed, the fourth on-off valve 1Cf side of the second three-way valve 1Ec is closed, and the downstream strainer 1E side of the first three-way valve 1Eb is closed. Accordingly, the coolant flowing through the supply pipe 121Bb is reversed from the right to the left in FIG. 9 through the orifice 1A, and is supplied to the heat exchanger 121 through the downstream strainer 1E. Is done. For this reason, the foreign matter is removed from the orifice 1A and collected by the downstream strainer 1E.

  As described above, the foreign substance removal / recovery device 1 according to the present embodiment can be configured to have a symmetric operation by being configured in a symmetric arrangement, and each on-off valve 1Cc, 1Cd, 1Ce, 1Cf and each three-way valve 1Eb, The situation where the part of 1Ec is overused can be prevented, and the mechanical life can be extended.

[Embodiment 2]
FIG. 10 is a configuration diagram of the foreign substance removal / recovery device according to the present embodiment. FIGS. 11 and 12 are configuration diagrams illustrating the operation of the foreign matter removal / recovery device according to the present embodiment. FIG. It is a block diagram which shows the other form of the foreign material removal collection apparatus which concerns on a form, and FIG. 14 is a block diagram which shows the other operation | movement of the foreign material removal collection apparatus which concerns on this embodiment.

  The foreign substance removal / recovery device 1 of the present embodiment is configured based on the basic form shown in FIG. Therefore, in this embodiment described below, the same reference numerals are given to the same parts as the basic form, and the description thereof is omitted.

  In contrast to the basic form shown in FIG. 3, the foreign matter removing and collecting apparatus 1 of the present embodiment includes a downstream strainer 1 </ b> G as shown in FIG. 10. The downstream strainer 1G is provided in the reversing portion 1C, and allows the coolant that has passed through the orifice 1A to pass through in the reversal to the reverse flow. The downstream strainer 1G is provided on the first on-off valve 1Cc side of the connection portion of the first pipe 1Ca with the orifice pipe 1Aa and on the rear side of the first on-off valve 1Cc. The switching pipe 1Ga has one end connected between the downstream strainer 1G and the first on-off valve 1Cc in the first pipe 1Ca, and the other end connected to the first pipe 1Ca side of the differential pressure gauge pipe 1Ba in the orifice pipe 1Aa. Has been. A switching three-way valve 1Gb is provided at a portion where the switching pipe 1Ga is connected to the orifice pipe 1Aa. The switching three-way valve 1Gb is connected to the control unit 1D. Then, the control unit 1D acquires the pressure difference before and after the orifice 1A detected by the differential pressure gauge 1B, and when the pressure difference exceeds (below) the threshold value, the above-described on-off valves 1Cc, 1Cd, 1Ce, 1Cf Then, the switching three-way valve 1Gb is controlled to reverse the coolant flow in the forward and reverse directions.

  The operation of the foreign substance removal / recovery device 1 of this embodiment will be described with reference to FIGS. 11 and 12. Here, the operation of the foreign substance removal / collection apparatus 1 shown in FIG. 11 is assumed to be normal, and the operation of the foreign substance removal / collection apparatus 1 shown in FIG. 12 is assumed to be abnormal. The normal state means that the flow rate of the coolant is adjusted to an appropriate range by the orifice 1A, and the control unit 1D determines that the pressure difference acquired from the differential pressure gauge 1B is within the appropriate range. In addition, the abnormal time means that the flow rate of the coolant is not adjusted to an appropriate range by the orifice 1A, and foreign matter (floating matter, aquatic organisms, etc.) mixed in the coolant that is seawater or river water is the orifice 1A. The controller 1D determines that the pressure difference acquired from the differential pressure gauge 1B has fallen below the lower limit (threshold value) of the appropriate range.

  In a normal state, as shown in FIG. 11, the control unit 1D opens the first on-off valve 1Cc and the fourth on-off valve 1Cf, closes the second on-off valve 1Cd and the third on-off valve 1Ce, The first piping 1Ca side in the orifice piping 1Aa of the switching three-way valve 1Gb is closed. As a result, the coolant flowing through the supply pipe 121Bb becomes a positive flow that passes through the orifice 1A from right to left in FIG. 11, and is supplied to the heat exchanger 121 without passing through the downstream strainer 1G.

  On the other hand, at the time of abnormality, as shown in FIG. 12, the controller 1D closes the first on-off valve 1Cc and the fourth on-off valve 1Cf, and opens the second on-off valve 1Cd and the third on-off valve 1Ce. At the same time, the first piping 1Ca side of the orifice piping 1Aa of the switching three-way valve 1Gb is closed. As a result, the coolant flowing through the supply pipe 121Bb is made a reverse flow that passes through the orifice 1A from the left to the right in FIG. 12, and passes through the downstream strainer 1G and is supplied to the heat exchanger 121. For this reason, foreign matters are removed from the orifice 1A and collected by the downstream strainer 1G.

  Thereafter, when the pressure difference acquired from the differential pressure gauge 1B falls within an appropriate range, the control unit 1D returns to the normal operation in FIG. During this normal operation, the operator removes the foreign matter collected by the downstream strainer 1G.

  As described above, the foreign substance removal / recovery device 1 of the present embodiment includes an orifice (narrow portion) 1A provided in the middle of the supply pipe 121Bb to which a fluid is supplied, and a differential pressure gauge 1B that detects a pressure difference before and after the orifice 1A. And a reversing part 1C that is interposed in the supply pipe 121Bb and reverses the coolant (fluid) for the orifice 1A from the normal flow to the reverse flow, and the reversal part 1C that is provided in the reversing part 1C passes through the orifice 1A in the reverse flow. A possible downstream strainer 1G, and a control unit 1D for controlling the reversing unit 1C to reverse the flow of the coolant to the orifice 1A in the forward and reverse directions when the pressure difference detected by the differential pressure gauge 1B exceeds a predetermined threshold; Is provided.

  According to the foreign substance removal / recovery device 1, when the pressure difference across the orifice 1A detected by the differential pressure gauge 1B exceeds a threshold value, the reversing unit 1C is controlled to change the coolant flow to the orifice 1A from the normal flow to the reverse flow. In order to pass the coolant passing through the orifice 1A to the downstream strainer 1G when reversing to the reverse flow, the clogging of the foreign matter in the orifice 1A is automatically detected and the foreign matter is removed from the orifice 1A, and The removed foreign matter can be collected by the downstream strainer 1G. In particular, the foreign substance removal / recovery device 1 collects foreign substances in the middle of the supply pipe 121Bb, thereby preventing a situation where foreign substances are circulated to a system or device downstream of the supply pipe 121Bb. As a result, it is possible to prevent clogging and breakage of downstream systems and devices due to foreign matter contamination.

  In addition, as shown in FIG. 13, it is preferable that the foreign material removal collection | recovery apparatus 1 has the upstream strainer 1H which can pass the coolant before passing through the orifice 1A in the reversal to a reverse flow. Specifically, the upstream strainer 1H is provided on the third on-off valve 1Ce side with respect to the connection portion of the second pipe 1Cb with the orifice pipe 1Aa, on the front side or the rear side of the third on-off valve 1Ce. Alternatively, the upstream strainer 1H is provided on the second pipe 1Cb side with respect to the connection portion between the orifice pipe 1Aa and the differential pressure gauge pipe 1Ba.

  Thus, by providing the upstream strainer 1H, when the reverse flow is reversed as shown in FIG. 12, foreign matter mixed in the coolant reaching the orifice 1A is collected by the upstream strainer 1H. It is possible to prevent the orifice 1A from being clogged with foreign matter.

  By the way, as shown in FIG. 14, the foreign substance removal collection | recovery apparatus 1 of this embodiment makes the switching piping 1Ga side of the switching three-way valve 1Gb closed as shown in FIG. As a result, the coolant flowing through the supply pipe 121Bb becomes a positive flow passing through the orifice 1A from right to left in FIG. 14, and passes through the downstream strainer 1G before passing through the orifice 1A. For this reason, when the flow is positive, the foreign strain is collected by the downstream strainer 1G, so that the situation where the orifice 1A is clogged with the foreign matter can be prevented.

[Embodiment 3]
FIG. 15 is a configuration diagram of the foreign matter removal and collection apparatus according to the present embodiment. FIGS. 16 to 18 are configuration diagrams illustrating the operation of the foreign matter removal and collection apparatus according to the present embodiment. FIG. It is a block diagram which shows the other form of the foreign material removal collection apparatus which concerns on a form, and FIG. 20 is a block diagram which shows the other operation | movement of the foreign material removal collection apparatus which concerns on this embodiment.

  The foreign substance removal / recovery device 1 of the present embodiment is configured based on the basic form shown in FIG. Therefore, in this embodiment described below, the same reference numerals are given to the same parts as the basic form, and the description thereof is omitted.

  In contrast to the basic form shown in FIG. 3, the foreign matter removing and collecting apparatus 1 of the present embodiment includes downstream strainers 1Ja and 1Jb as shown in FIG. The downstream strainers 1Ja and 1Jb are provided in the reversing portion 1C so that the coolant having passed through the orifice 1A can pass through the reversal to the reverse flow. The downstream strainer 1Ja is provided on the first opening / closing valve 1Cc side of the connection portion of the first piping 1Ca with the orifice piping 1Aa and on the rear side of the first opening / closing valve 1Cc. The downstream strainer 1Jb is provided in a parallel pipe 1Jc that bypasses the downstream strainer 1Ja so as to be parallel to the downstream strainer 1Ja. The parallel pipe 1Jc is connected to the first pipe 1Ca so as to connect between the first on-off valve 1Cc and the downstream strainer 1Ja and between the downstream strainer 1Ja and the orifice pipe 1Aa. Further, a strainer three-way valve 1Jd is provided at a connection portion where the parallel pipe 1Jc is connected to the first pipe 1Ca between the downstream strainer 1Ja and the orifice pipe 1Aa. The strainer three-way valve 1Jd is connected to the control unit 1D. Further, the strainer differential pressure gauge 1Je is connected to the differential pressure gauge pipe 1Jf that connects the connection portion of the first pipe 1Ca to which the parallel pipe 1Jc is connected and the strainer three-way valve 1Jd and the orifice pipe 1Aa in the first pipe 1Ca. Is provided. Further, the switching pipe 1Jg is connected at one end between the first on-off valve 1Cc in the first pipe 1Ca and the connecting part of the parallel pipe 1Jc and the differential pressure gauge pipe 1Jf, and more than the differential pressure gauge pipe 1Ba in the orifice pipe 1Aa. The other end is connected to the first pipe 1Ca side. A switching three-way valve 1Jh is provided at a portion where the switching pipe 1Jg is connected to the orifice pipe 1Aa. The switching three-way valve 1Jh is connected to the control unit 1D. Then, the control unit 1D acquires the pressure difference before and after the orifice 1A detected by the differential pressure gauge 1B, and when the pressure difference exceeds (below) the threshold value, the above-described on-off valves 1Cc, 1Cd, 1Ce, 1Cf Then, the switching three-way valve 1Jh is controlled to reverse the coolant flow in the forward and reverse directions. In addition, the control unit 1D has a preset pressure difference range around each of the downstream strainers 1Ja, 1Jb corresponding to an appropriate range of the flow rate of the coolant passing through each of the downstream strainers 1Ja, 1Jb. The lower limit value of the range is stored in advance as a threshold value. And control part 1D acquires the pressure difference before and behind each downstream strainer 1Ja and 1Jb detected by strainer differential pressure gauge 1Je, and when this pressure difference exceeds a threshold (below), it controls strainer three-way valve 1Jd. Then, the downstream strainers 1Ja and 1Jb are selectively switched to distribute the coolant.

  The operation of the foreign substance removal / recovery device 1 according to the present embodiment will be described with reference to FIGS. Here, the operation of the foreign matter removal / collection apparatus 1 shown in FIG. 16 is assumed to be normal, and the operation of the foreign matter removal / collection apparatus 1 shown in FIGS. 17 and 18 is assumed to be abnormal. The normal state means that the flow rate of the coolant is adjusted to an appropriate range by the orifice 1A, and the control unit 1D determines that the pressure difference acquired from the differential pressure gauge 1B is within the appropriate range. In addition, the abnormal time means that the flow rate of the coolant is not adjusted to an appropriate range by the orifice 1A, and foreign matter (floating matter, aquatic organisms, etc.) mixed in the coolant that is seawater or river water is the orifice 1A. The controller 1D determines that the pressure difference acquired from the differential pressure gauge 1B has fallen below the lower limit (threshold value) of the appropriate range.

  In the normal state, as shown in FIG. 16, the control unit 1D opens the first on-off valve 1Cc and the fourth on-off valve 1Cf, closes the second on-off valve 1Cd and the third on-off valve 1Ce, The first pipe 1Ca side of the orifice pipe 1Aa of the switching three-way valve 1Jh is closed. As a result, the coolant flowing through the supply pipe 121Bb becomes a positive flow passing through the orifice 1A from right to left in FIG. 16, and is supplied to the heat exchanger 121 without passing through the downstream strainers 1Ja and 1Jb. .

  On the other hand, at the time of abnormality, as shown in FIG. 17, the controller 1D closes the first on-off valve 1Cc and the fourth on-off valve 1Cf, and opens the second on-off valve 1Cd and the third on-off valve 1Ce. At the same time, the first piping 1Ca side of the orifice piping 1Aa of the switching three-way valve 1Jh is closed, and the parallel piping 1Jc side of the strainer three-way valve 1Jd is closed. Thereby, the coolant flowing through the supply pipe 121Bb is made to flow backward from the left to the right in FIG. 17 and passes through the orifice 1A, and is supplied to the heat exchanger 121 through the downstream strainer 1Ja. For this reason, the foreign matter is removed from the orifice 1A and collected by the downstream strainer 1Ja.

  In addition, when the abnormality shown in FIG. 17 occurs, the control unit 1D causes the foreign matter removed from the orifice 1A to flow downstream when the pressure difference acquired from the strainer differential pressure gauge 1Je falls below the lower limit (threshold value) of the appropriate range. It is determined that the strainer 1Ja is recovered and the downstream strainer 1Ja is clogged. In this case, as shown in FIG. 18, the control unit 1D closes the downstream strainer 1Ja side of the strainer three-way valve 1Jd. As a result, the coolant flowing through the supply pipe 121Bb is made to flow backward from the left to the right in FIG. 18 through the orifice 1A, and is supplied to the heat exchanger 121 through the downstream strainer 1Jb. For this reason, foreign matters are removed from the orifice 1A and collected by the downstream strainer 1Jb.

  Thereafter, when the pressure difference acquired from the differential pressure gauge 1B falls within an appropriate range, the control unit 1D returns to the normal operation of FIG. During this normal operation, the operator removes foreign matter collected by the downstream strainers 1Ja, 1Jb.

  As described above, the foreign substance removal / recovery device 1 of the present embodiment includes an orifice (narrow portion) 1A provided in the middle of the supply pipe 121Bb to which a fluid is supplied, and a differential pressure gauge 1B that detects a pressure difference before and after the orifice 1A. And a reversing part 1C that is interposed in the supply pipe 121Bb and reverses the coolant (fluid) for the orifice 1A from the normal flow to the reverse flow, and the reversal part 1C that is provided in the reversing part 1C passes through the orifice 1A in the reverse flow. When the pressure difference detected by the possible downstream strainers 1Ja and 1Jb and the differential pressure gauge 1B exceeds a predetermined threshold, the control unit 1D controls the reversing unit 1C to reverse the coolant flow with respect to the orifice 1A. And comprising.

  According to the foreign substance removal / recovery device 1, when the pressure difference across the orifice 1A detected by the differential pressure gauge 1B exceeds a threshold value, the reversing unit 1C is controlled to change the coolant flow to the orifice 1A from the normal flow to the reverse flow. In order to pass the coolant passing through the orifice 1A to the downstream strainers 1Ja and 1Jb when reversing to the reverse flow, the clogging of the foreign matter at the orifice 1A is automatically detected and the foreign matter is removed from the orifice 1A. The removed foreign matter can be collected by the downstream strainers 1Ja and 1Jb. In particular, the foreign substance removal / recovery device 1 collects foreign substances in the middle of the supply pipe 121Bb, thereby preventing a situation where foreign substances are circulated to a system or device downstream of the supply pipe 121Bb. As a result, it is possible to prevent clogging and breakage of downstream systems and devices due to foreign matter contamination.

  Further, in the foreign substance removal / recovery device 1 of this embodiment, a plurality of downstream strainers 1Ja, 1Jb are provided in parallel, and the control unit 1D controls the downstream strainers 1Ja, 1Jb to automatically and selectively pass the coolant. It is preferable to do.

  According to this foreign matter removing and collecting apparatus 1, by automatically and selectively using a plurality of downstream strainers 1Ja and 1Jb arranged in parallel, even if one downstream strainer 1Ja is clogged with collected foreign matter, the other downstream strainer 1Jb removes foreign matter. Since it can collect | recover, a foreign material can be removed and collect | recovered, without stopping supply of the coolant to the heat exchanger 121. FIG. In addition, when one downstream strainer is used, it is necessary for maintenance personnel to clean and restore it at the installation location where the downstream strainer is arranged each time clogging occurs. However, a plurality of downstream strainers 1Ja and 1Jb are required to be restored. By installing and automatically using it, the frequency of cleaning work can be reduced and the burden on maintenance personnel can be reduced. In addition, it is desired to increase the capacity so that the foreign substance clogged in the orifice 1A is collected while preventing itself from clogging, and the cost increases. However, by using a plurality of downstream strainers 1Ja and 1Jb, a small cost can be reduced. Capacities can also be applied.

  In addition, as shown in FIG. 19, it is preferable that the foreign material removal collection | recovery apparatus 1 has the upstream strainer 1K which can pass the coolant before passing through the orifice 1A in the reversal to a reverse flow. Specifically, the upstream strainer 1K is provided on the third on-off valve 1Ce side with respect to the connection portion of the second pipe 1Cb with the orifice pipe 1Aa, on the front side or the rear side of the third on-off valve 1Ce. Alternatively, the upstream strainer 1K is provided on the second pipe 1Cb side with respect to the connection portion between the orifice pipe 1Aa and the differential pressure gauge pipe 1Ba.

  In this way, by providing the upstream strainer 1K, when the reverse flow is reversed as shown in FIG. 17 and FIG. 18, the foreign matter mixed in the coolant reaching the orifice 1A is collected by the upstream strainer 1K. In this case, it is possible to prevent the orifice 1A from being clogged with foreign substances.

  By the way, when the foreign material removal collection apparatus 1 of this embodiment makes a normal flow, as shown in FIG. 20, the switching piping 1Jg side of the switching three-way valve 1Jh is closed. As a result, the coolant flowing through the supply pipe 121Bb becomes a positive flow passing through the orifice 1A from right to left in FIG. 20, and passes through the downstream strainers 1Ja and 1Jb before passing through the orifice 1A. For this reason, when the flow is positive, the foreign strain is collected by the downstream strainers 1Ja and 1Jb, so that the situation where the orifice 1A is clogged with the foreign matter can be prevented.

  In FIG. 20, the parallel pipe 1Jc side of the strainer three-way valve 1Jd is closed, and the coolant is passed through the downstream strainer 1Ja. In the control unit 1D, when the pressure difference acquired from the strainer differential pressure gauge 1Je falls below the lower limit (threshold value) of the appropriate range, the downstream strainer 1Ja collects the foreign matter removed from the orifice 1A, and the downstream strainer When it is determined that 1Ja is clogged, the control unit 1D closes the downstream strainer 1Ja side of the strainer three-way valve 1Jd and allows the coolant to pass through the downstream strainer 1Jb. For this reason, even if one downstream strainer 1Ja is clogged with the collected foreign matter, the other downstream strainer 1Jb can collect the foreign matter, so the supply of the coolant to the heat exchanger 121 is not stopped.

[Embodiment 4]
FIG. 21 is a configuration diagram of the foreign substance removal / recovery device according to the present embodiment. FIGS. 22 and 23 are configuration diagrams illustrating the operation of the foreign matter removal / recovery device according to the present embodiment. FIG. FIG. 25 is a configuration diagram showing another form of the foreign matter removal and recovery apparatus according to the embodiment, and FIG. 25 is a configuration diagram showing another operation of the foreign matter removal and recovery apparatus according to Embodiment 4 of the present invention.

  The foreign substance removal / recovery device 1 of the present embodiment is configured based on the basic form shown in FIG. Therefore, in this embodiment described below, the same reference numerals are given to the same parts as the basic form, and the description thereof is omitted.

  In contrast to the basic form shown in FIG. 3, the foreign substance removal / recovery device 1 of this embodiment includes a downstream strainer 1L as shown in FIG. The downstream strainer 1L is provided in the reversing portion 1C so that the coolant passing through the orifice 1A can pass through when reversing to the reverse flow. In the orifice pipe 1Aa, a strainer bypass pipe 1La for bypassing the orifice pipe 1Aa is provided between the differential pressure gauge pipe 1Ba and the first pipe 1Ca. Further, a strainer pipe 1Lb is provided between the middle of the strainer bypass pipe 1La and the orifice pipe 1Aa bypassed by the strainer bypass pipe 1La. The downstream strainer 1L is provided in the strainer pipe 1Lb. Further, in the strainer bypass pipe 1La, a first check valve 1Lc for restricting the flow toward the strainer pipe 1Lb is provided closer to the orifice 1A than the connection portion of the strainer pipe 1Lb. Further, in the strainer bypass pipe 1La, a second check valve 1Ld that restricts the flow toward the strainer pipe 1Lb is provided on the first pipe 1Ca side of the connection portion of the strainer pipe 1Lb. In addition, in the portion of the orifice pipe 1Aa that is bypassed by the strainer bypass pipe 1La, a third check valve 1Le that restricts the flow toward the orifice 1A side is provided on the orifice 1A side of the connection portion of the strainer pipe 1Lb. Yes. Further, in the portion of the orifice piping 1Aa bypassed by the strainer bypass piping 1La, the fourth check valve 1Lf that restricts the flow toward the first piping 1Ca side to the first piping 1Ca side than the connection portion of the strainer piping 1Lb. Is provided. In addition, the orifice pipe 1Aa is provided with an outer bypass pipe 1Lg that bypasses the outside of the strainer bypass pipe 1La. A switching three-way valve 1Lh is provided at a connection portion between the outer bypass pipe 1Lg and the orifice pipe 1Aa on the first pipe 1Ca side. The switching three-way valve 1Lh is connected to the control unit 1D. Then, the control unit 1D acquires the pressure difference before and after the orifice 1A detected by the differential pressure gauge 1B, and when the pressure difference exceeds (below) the threshold value, the above-described on-off valves 1Cc, 1Cd, 1Ce, 1Cf Then, the switching three-way valve 1Lh is controlled to reverse the coolant flow in the forward and reverse directions.

  The operation of the foreign substance removal / recovery device 1 of this embodiment will be described with reference to FIGS. Here, the operation of the foreign matter removal / collection apparatus 1 shown in FIG. 22 is assumed to be normal, and the operation of the foreign matter removal / collection apparatus 1 shown in FIG. 23 is assumed to be abnormal. The normal state means that the flow rate of the coolant is adjusted to an appropriate range by the orifice 1A, and the control unit 1D determines that the pressure difference acquired from the differential pressure gauge 1B is within the appropriate range. In addition, the abnormal time means that the flow rate of the coolant is not adjusted to an appropriate range by the orifice 1A, and foreign matter (floating matter, aquatic organisms, etc.) mixed in the coolant that is seawater or river water is the orifice 1A. The controller 1D determines that the pressure difference acquired from the differential pressure gauge 1B has fallen below the lower limit (threshold value) of the appropriate range.

In a normal state, the control unit 1D opens the first on-off valve 1Cc and the fourth on-off valve 1Cf, closes the second on-off valve 1Cd and the third on-off valve 1Ce, as shown in FIG. Strainer bypass piping 1La in the orifice piping 1Aa of the switching three-way valve 1Lh
Close the side. As a result, the coolant flowing through the supply pipe 121Bb becomes a positive flow that passes through the orifice 1A from right to left in FIG. 22, and is supplied to the heat exchanger 121 without passing through the downstream strainer 1L.

  On the other hand, at the time of abnormality, the control unit 1D closes the first on-off valve 1Cc and the fourth on-off valve 1Cf and opens the second on-off valve 1Cd and the third on-off valve 1Ce as shown in FIG. At the same time, the outer bypass pipe 1Lg side of the switching three-way valve 1Lh is closed. As a result, the coolant flowing through the supply pipe 121Bb becomes a reverse flow that passes through the orifice 1A from the left to the right in FIG. 23, and passes through the downstream strainer 1L by the action of the check valves 1Lc, 1Ld, 1Le, and 1Lf. And supplied to the heat exchanger 121. For this reason, foreign matters are removed from the orifice 1A and collected by the downstream strainer 1L.

  Thereafter, when the pressure difference acquired from the differential pressure gauge 1B falls within an appropriate range, the control unit 1D returns to the normal operation in FIG. During this normal operation, the operator removes the foreign matter collected by the downstream strainer 1L.

  As described above, the foreign substance removal / recovery device 1 of the present embodiment includes an orifice (narrow portion) 1A provided in the middle of the supply pipe 121Bb to which a fluid is supplied, and a differential pressure gauge 1B that detects a pressure difference before and after the orifice 1A. And a reversing part 1C that is interposed in the supply pipe 121Bb and reverses the coolant (fluid) for the orifice 1A from the normal flow to the reverse flow, and the reversal part 1C that is provided in the reversing part 1C passes through the orifice 1A in the reverse flow. A possible downstream strainer 1L, and a control unit 1D that controls the reversal unit 1C to reverse the flow of the coolant to the orifice 1A when the pressure difference detected by the differential pressure gauge 1B exceeds a predetermined threshold; Is provided.

  According to the foreign substance removal / recovery device 1, when the pressure difference across the orifice 1A detected by the differential pressure gauge 1B exceeds a threshold value, the reversing unit 1C is controlled to change the coolant flow to the orifice 1A from the normal flow to the reverse flow. In order to pass the coolant passing through the orifice 1A to the downstream strainer 1L when reversing to the reverse flow, the clogging of the foreign matter in the orifice 1A is automatically detected and the foreign matter is removed from the orifice 1A. The removed foreign matter can be collected by the downstream strainer 1L. In particular, the foreign substance removal / recovery device 1 collects foreign substances in the middle of the supply pipe 121Bb, thereby preventing a situation where foreign substances are circulated to a system or device downstream of the supply pipe 121Bb. As a result, it is possible to prevent clogging and breakage of downstream systems and devices due to foreign matter contamination.

  In addition, the foreign substance removal / recovery device 1 according to the present embodiment preferably includes check valves 1Lc, 1Ld, 1Le, and 1Lf that regulate the flow direction of the coolant to the downstream strainer 1L during forward and reverse reversal by the reversing unit 1C.

  According to the foreign matter removal and collection apparatus 1, the flow direction of the coolant to the downstream strainer 1L is regulated by a static mechanism such as check valves 1Lc, 1Ld, 1Le, and 1Lf, so that the valve is mechanically switched as a dynamic device. Foreign matter can be reliably collected from the downstream strainer 1L without depending on the mechanism, its drive source, control equipment, and the like.

  In addition, as shown in FIG. 24, it is preferable that the foreign material removal collection | recovery apparatus 1 has the upstream strainer 1M which can pass the coolant before passing through the orifice 1A in the reversal to a reverse flow. Specifically, the upstream strainer 1M is provided on the third on-off valve 1Ce side with respect to the connection portion of the second pipe 1Cb with the orifice pipe 1Aa, on the front side or the rear side of the third on-off valve 1Ce. Alternatively, the upstream strainer 1M is provided on the second pipe 1Cb side with respect to the connection portion between the orifice pipe 1Aa and the differential pressure gauge pipe 1Ba.

  In this way, by providing the upstream strainer 1M, when the reverse flow is reversed as shown in FIG. 23, foreign matter mixed in the coolant reaching the orifice 1A is collected by the upstream strainer 1M. It is possible to prevent the orifice 1A from being clogged with foreign matter.

  By the way, in the foreign substance removal / recovery device 1 according to the present embodiment, when the positive flow is set, as shown in FIG. As a result, the coolant flowing through the supply pipe 121Bb becomes a normal flow that passes through the orifice 1A from right to left in FIG. 25, and the orifice 1A is moved by the action of the check valves 1Lc, 1Ld, 1Le, and 1Lf. It passes to 1L of downstream strainers before passing. For this reason, since the foreign substance is collected by the downstream strainer 1L when the flow is positive, it is possible to prevent the orifice 1A from being clogged with the foreign substance.

[Embodiment 5]
FIG. 26 is a configuration diagram of the foreign substance removal / recovery device according to the present embodiment, FIGS. 27 to 29 are configuration diagrams showing the operation of the foreign matter removal / recovery device according to the present embodiment, and FIG. 30 shows the present embodiment. It is a block diagram which shows the other form of the foreign material removal collection apparatus which concerns on a form, and FIG. 31 is a block diagram which shows the other operation | movement of the foreign material removal collection apparatus which concerns on this embodiment.

  The foreign substance removal / recovery device 1 of the present embodiment is configured based on the basic form shown in FIG. Therefore, in this embodiment described below, the same reference numerals are given to the same parts as the basic form, and the description thereof is omitted.

  In contrast to the basic form shown in FIG. 3, the foreign substance removal / recovery device 1 of the present embodiment includes downstream strainers 1Na and 1Nb as shown in FIG. The downstream strainers 1Na and 1Nb are provided in the reversing unit 1C so that the coolant passing through the orifice 1A can pass through the reversal to the reverse flow. In the orifice pipe 1Aa, a strainer bypass pipe 1Nc for bypassing the orifice pipe 1Aa is provided between the differential pressure gauge pipe 1Ba and the first pipe 1Ca. Further, a strainer pipe 1Nd is provided between the middle of the strainer bypass pipe 1Nc and the orifice pipe 1Aa bypassed by the strainer bypass pipe 1Nc. The downstream strainer 1Na is provided in the strainer pipe 1Nd. The downstream strainer 1Nb is provided in the parallel pipe 1Ne that bypasses the downstream strainer 1Na so as to be parallel to the downstream strainer 1Na. Both ends of the parallel pipe 1Ne are connected to the strainer pipe 1Nd. Further, a strainer three-way valve 1Nf is provided at a connection portion where the parallel pipe 1Ne is connected to the orifice pipe 1Aa side. The strainer three-way valve 1Nf is connected to the control unit 1D. Further, the strainer differential pressure gauge 1Ng connects the connection portion where the parallel pipe 1Ne is connected to the strainer bypass pipe 1Nc in the strainer pipe 1Nd, and the strainer three-way valve 1Nf and the orifice pipe 1Aa in the strainer pipe 1Nd. It is provided in the pipe 1Nh. Further, in the strainer bypass pipe 1Nc, a first check valve 1Ni that restricts the flow toward the strainer pipe 1Nd is provided closer to the orifice 1A than the connection portion of the strainer pipe 1Nd. In addition, in the strainer bypass pipe 1Nc, a second check valve 1Nj that restricts the flow toward the strainer pipe 1Nd is provided on the first pipe 1Ca side of the connection portion of the strainer pipe 1Nd. Further, in the portion of the orifice piping 1Aa bypassed by the strainer bypass piping 1Nc, a third check valve 1Nk for restricting the flow toward the orifice 1A side is provided on the orifice 1A side than the connection portion of the strainer piping 1Nd. Yes. Further, in the portion of the orifice pipe 1Aa bypassed by the strainer bypass pipe 1Nc, the fourth check valve 1Nm that restricts the flow toward the first pipe 1Ca side to the first pipe 1Ca side than the connection part of the strainer pipe 1Nd. Is provided. In addition, the orifice pipe 1Aa is provided with an outer bypass pipe 1Nn that bypasses the outside of the strainer bypass pipe 1Nc. And the switching three-way valve 1Np is provided in the connection part with the orifice piping 1Aa which becomes the 1st piping 1Ca side of the outer side bypass piping 1Nn. The switching three-way valve 1Np is connected to the control unit 1D. Then, the control unit 1D acquires the pressure difference before and after the orifice 1A detected by the differential pressure gauge 1B, and when the pressure difference exceeds (below) the threshold value, the above-described on-off valves 1Cc, 1Cd, 1Ce, 1Cf Then, the switching three-way valve 1Np is controlled to reverse the coolant flow forward and backward.

  The operation of the foreign substance removal / recovery device 1 of the present embodiment will be described with reference to FIGS. Here, the operation of the foreign substance removal / collection apparatus 1 shown in FIG. 27 is assumed to be normal, and the operation of the foreign substance removal / collection apparatus 1 shown in FIGS. 28 and 29 is assumed to be abnormal. The normal state means that the flow rate of the coolant is adjusted to an appropriate range by the orifice 1A, and the control unit 1D determines that the pressure difference acquired from the differential pressure gauge 1B is within the appropriate range. In addition, the abnormal time means that the flow rate of the coolant is not adjusted to an appropriate range by the orifice 1A, and foreign matter (floating matter, aquatic organisms, etc.) mixed in the coolant that is seawater or river water is the orifice 1A. The controller 1D determines that the pressure difference acquired from the differential pressure gauge 1B has fallen below the lower limit (threshold value) of the appropriate range.

  In the normal state, as shown in FIG. 27, the control unit 1D opens the first on-off valve 1Cc and the fourth on-off valve 1Cf, closes the second on-off valve 1Cd and the third on-off valve 1Ce, The strainer bypass piping 1Nc side in the orifice piping 1Aa of the switching three-way valve 1Np is closed. As a result, the coolant flowing through the supply pipe 121Bb becomes a positive flow that passes through the orifice 1A from right to left in FIG. 27 and is supplied to the heat exchanger 121 without passing through the downstream strainers 1Na and 1Nb. .

  On the other hand, at the time of abnormality, as shown in FIG. 28, the controller 1D closes the first on-off valve 1Cc and the fourth on-off valve 1Cf, and opens the second on-off valve 1Cd and the third on-off valve 1Ce. At the same time, the outer bypass pipe 1Nn side of the switching three-way valve 1Np is closed, and the parallel pipe 1Ne side of the strainer three-way valve 1Nf is closed. As a result, the coolant flowing through the supply pipe 121Bb is made to flow backward from the left to the right in FIG. 28 through the orifice 1A and through the downstream strainer 1Na by the action of the check valves 1Ni, 1Nj, 1Nk, 1Nm. Then, the heat exchanger 121 is supplied. For this reason, foreign matters are removed from the orifice 1A and collected by the downstream strainer 1Na.

  Further, at the time of abnormality shown in FIG. 28, the control unit 1D causes the foreign matter removed from the orifice 1A to flow downstream when the pressure difference acquired from the strainer differential pressure gauge 1Ng falls below the lower limit (threshold value) of the appropriate range. It is determined that the strainer 1Na is recovered and the downstream strainer 1Na is clogged. In this case, as shown in FIG. 29, the control unit 1D closes the downstream strainer 1Na side of the strainer three-way valve 1Nf. As a result, the coolant flowing through the supply pipe 121Bb becomes a reverse flow that passes through the orifice 1A from the left to the right in FIG. 29 and passes through the downstream strainer 1Nb by the action of the check valves 1Ni, 1Nj, 1Nk, and 1Nm. Then, the heat exchanger 121 is supplied. For this reason, foreign matters are removed from the orifice 1A and collected by the downstream strainer 1Nb.

  Thereafter, when the pressure difference acquired from the differential pressure gauge 1B falls within an appropriate range, the control unit 1D returns to the normal operation in FIG. During this normal operation, the operator removes foreign matter collected by the downstream strainers 1Na and 1Nb.

  As described above, the foreign substance removal / recovery device 1 of the present embodiment includes an orifice (narrow portion) 1A provided in the middle of the supply pipe 121Bb to which a fluid is supplied, and a differential pressure gauge 1B that detects a pressure difference before and after the orifice 1A. And a reversing part 1C that is interposed in the supply pipe 121Bb and reverses the coolant (fluid) for the orifice 1A from the normal flow to the reverse flow, and the reversal part 1C that is provided in the reversing part 1C passes through the orifice 1A in the reverse flow. When the pressure difference detected by the possible downstream strainers 1Na and 1Nb and the differential pressure gauge 1B exceeds a predetermined threshold value, the controller 1D controls the reversing unit 1C to reverse the flow of the coolant to the orifice 1A. And comprising.

  According to the foreign substance removal / recovery device 1, when the pressure difference across the orifice 1A detected by the differential pressure gauge 1B exceeds a threshold value, the reversing unit 1C is controlled to change the coolant flow to the orifice 1A from the normal flow to the reverse flow. In order to pass the coolant passing through the orifice 1A to the downstream strainers 1Na and 1Nb when reversing to the reverse flow, the clogging of the foreign matter at the orifice 1A is automatically detected and the foreign matter is removed from the orifice 1A. The removed foreign matter can be recovered by the downstream strainers 1Na and 1Nb. In particular, the foreign substance removal / recovery device 1 collects foreign substances in the middle of the supply pipe 121Bb, thereby preventing a situation where foreign substances are circulated to a system or device downstream of the supply pipe 121Bb. As a result, it is possible to prevent clogging and breakage of downstream systems and devices due to foreign matter contamination.

  Further, in the foreign substance removal / recovery device 1 of the present embodiment, a plurality of downstream strainers 1Na and 1Nb are provided in parallel, and the control unit 1D controls the downstream strainers 1Na and 1Nb to automatically and selectively pass the coolant. It is preferable to do.

  According to this foreign matter removing and collecting apparatus 1, by automatically using a plurality of downstream strainers 1Na and 1Nb arranged in parallel, even if one downstream strainer 1Na is clogged with collected foreign matter, the other downstream strainer 1Nb removes foreign matter. Since it can collect | recover, a foreign material can be removed and collect | recovered, without stopping supply of the coolant to the heat exchanger 121. FIG. In addition, when one downstream strainer is used, it is necessary for maintenance personnel to clean and restore it at the installation location where the downstream strainer is arranged each time clogging occurs. However, a plurality of downstream strainers 1Ja and 1Jb are required to be restored. By installing and automatically using it, the frequency of cleaning work can be reduced and the burden on maintenance personnel can be reduced. Further, it is desired to increase the capacity so that the foreign substance clogged in the orifice 1A is collected while preventing itself from clogging, and the cost increases. However, by using a plurality of downstream strainers 1Na and 1Nb, a small cost can be reduced. Capacities can also be applied.

  Further, the foreign substance removal / recovery device 1 of the present embodiment includes check valves 1Ni, 1Nj, 1Nk, 1Nm that regulate the flow direction of the coolant to the downstream strainers 1Na, 1Nb when the reversing unit 1C performs forward / reverse reversal. preferable.

  According to the foreign matter removal and collection apparatus 1, the flow direction of the coolant to the downstream strainers 1Na and 1Nb is regulated by a static mechanism such as the check valves 1Ni, 1Nj, 1Nk, and 1Nm, thereby mechanically acting as a dynamic device. The foreign matter can be reliably collected from the downstream strainer 1L without depending on the valve mechanism to be switched, its driving source, and control equipment.

  In addition, as shown in FIG. 30, it is preferable that the foreign material removal collection | recovery apparatus 1 has the upstream strainer 1P which can pass the coolant before passing through the orifice 1A in the reversal to a reverse flow. Specifically, the upstream strainer 1P is provided on the third on-off valve 1Ce side of the connection portion of the second pipe 1Cb with the orifice pipe 1Aa, on the front side or the rear side of the third on-off valve 1Ce. Alternatively, the upstream strainer 1P is provided on the second pipe 1Cb side with respect to the connection portion between the orifice pipe 1Aa and the differential pressure gauge pipe 1Ba.

  In this way, by providing the upstream strainer 1P, when the reverse flow as shown in FIGS. 28 and 29 is reversed, the foreign matter mixed in the coolant reaching the orifice 1A is collected by the upstream strainer 1P, and thus the reverse flow is reversed. In this case, it is possible to prevent the orifice 1A from being clogged with foreign substances.

  By the way, when the foreign material removal collection apparatus 1 of this embodiment makes a normal flow, as shown in FIG. 31, the outer bypass pipe 1Nn side of the switching three-way valve 1Np is closed. As a result, the coolant flowing through the supply pipe 121Bb becomes a normal flow that passes through the orifice 1A from right to left in FIG. 31, and the orifice 1A is passed through the check valves 1Ni, 1Nj, 1Nk, and 1Nm. Before passing, it passes through the downstream strainers 1Na and 1Nb. For this reason, in the case of a positive flow, the foreign strain is collected by the downstream strainers 1Na and 1Nb, so that the situation where the orifice 1A is clogged with the foreign matter can be prevented.

  In FIG. 31, the parallel pipe 1Ne side of the strainer three-way valve 1Nf is closed, and the coolant is passed through the downstream strainer 1Na. In the control unit 1D, when the pressure difference acquired from the strainer differential pressure gauge 1Ng falls below the lower limit (threshold value) of the appropriate range, the downstream strainer 1Na collects the foreign matter removed from the orifice 1A and the downstream strainer. When it is determined that 1Na is clogged, the control unit 1D closes the downstream strainer 1Na side of the strainer three-way valve 1Nf and allows the coolant to pass through the downstream strainer 1Nb. For this reason, even if one downstream strainer 1Na is clogged with the collected foreign matter, the other downstream strainer 1Nb can collect the foreign matter, so the supply of the coolant to the heat exchanger 121 is not stopped.

  In addition, the foreign material removal collection apparatus 1 of Embodiment 1 mentioned above is provided with the heat exchanger 121 which performs heat exchange between the fluid which distribute | circulates the cooling object 120, and a coolant, as shown in FIG. In the cooling facility, the heat exchanger 121 is applied to a supply pipe 121Bb that supplies a coolant.

  As described above, according to the cooling facility to which the foreign substance removal / recovery device 1 of the first to fifth embodiments is applied, the foreign substance clogging in the orifice (narrow part) 1A is automatically detected and the foreign substance is removed from the orifice. The removed foreign matter can be recovered from 1A. In particular, this cooling facility can prevent foreign matter from flowing through the heat exchanger 121 by collecting foreign matter in the middle of the supply pipe 121Bb that supplies the coolant to the heat exchanger 121. As a result, it is possible to prevent the heat exchanger 121 from being clogged or damaged due to foreign matter contamination.

  Further, as shown in FIGS. 1 and 2, the above-described cooling facility generates a high-temperature fluid by heat generated in a nuclear reactor and sends it by piping, and in a nuclear facility using the high-temperature fluid, the cooling in the facility is performed. Applies to cooling of object 120.

  As described above, according to the nuclear power facility to which the above-described cooling equipment is applied, the clogging of the foreign matter in the orifice (narrow portion) 1A is automatically detected, the foreign matter is removed from the orifice 1A, and the removed foreign matter is detected. Can be recovered. In particular, this nuclear power facility can prevent the foreign matter from flowing through the heat exchanger 121 by collecting the foreign matter in the middle of the supply pipe 121Bb for supplying the coolant to the heat exchanger 121. As a result, it is possible to prevent the heat exchanger 121 from being clogged or damaged due to foreign matter contamination. Moreover, in the nuclear power facility, when the heat transfer tube 121Ba of the heat exchanger 121 is damaged, there is a possibility that the high-temperature fluid exposed to radiation enters the coolant and leaks outside the heat exchanger 121. In order to prevent the heat exchanger 121 from being clogged or damaged due to contamination by foreign matter, the nuclear power plant according to the embodiment can prevent an event in which a high-temperature fluid exposed to radiation enters the coolant and leaks outside the heat exchanger 121. it can.

1 Foreign material removal and collection device 1A Orifice (narrow part)
1B Differential Pressure Gauge 1C Inversion Unit 1D Control Unit 1E Downstream Strainer 1G Downstream Strainer 1L Downstream Strainer 1Na, 1Nb Downstream Strainer 1Ja, 1Jb Downstream Strainer 1F Upstream Strainer 1H Upstream Strainer 1K Upstream Strainer 1P Upstream Strainer Exchanger 120 121Bb Supply pipe 1Lc 1st check valve 1Ld 2nd check valve 1Le 3rd check valve 1Lf 4th check valve 1Ni 1st check valve 1Nj 2nd check valve 1Nk 3rd check valve 1Nm 4th check valve

Claims (7)

A foreign matter removal and collection device for removing and collecting foreign matter contained in a fluid,
A narrow portion provided in the middle of a supply pipe to which a fluid is supplied;
A differential pressure gauge for detecting a pressure difference before and after the narrow portion;
An inversion part interposed in the supply pipe to invert the fluid from the normal flow to the reverse flow with respect to the narrow part;
A downstream strainer provided in the reversing part and capable of passing the fluid that has passed through the narrow part in reversing to a reverse flow;
A control unit that controls the reversing unit to reverse the flow of fluid to the narrow portion when the pressure difference detected by the differential pressure gauge exceeds a predetermined threshold; and
A foreign matter removing and collecting apparatus comprising:   The foreign substance removing and collecting apparatus according to claim 1, wherein a plurality of the downstream strainers are provided in parallel, and the control unit automatically and selectively controls each of the downstream strainers so that the fluid can pass therethrough.   The foreign matter removing and collecting apparatus according to claim 1, further comprising a check valve that regulates a flow direction of fluid to the downstream strainer during forward and reverse reversal by the reversing unit. A foreign matter removal and collection device for removing and collecting foreign matter contained in a fluid,
A narrow portion provided in the middle of a supply pipe to which a fluid is supplied;
A downstream strainer that allows passage of fluid through the narrow portion when the fluid is reversed from a normal flow to a reverse flow with respect to the narrow portion;
A check valve that regulates the flow direction of the fluid to the downstream strainer during forward and reverse reversal of the fluid;
A foreign matter removing and collecting apparatus comprising:   The foreign matter removing and collecting apparatus according to any one of claims 1 to 3, further comprising an upstream strainer through which a fluid before passing through the narrowed portion can pass in reversal to the reverse flow. A cooling facility including a heat exchanger for exchanging heat between a fluid circulating in a cooling target and a coolant,
A cooling facility, wherein the foreign matter removing and collecting apparatus according to any one of claims 1 to 5 is applied to a supply pipe that supplies a coolant to the heat exchanger. A nuclear facility that generates a high-temperature fluid by heat generated in a nuclear reactor and sends it by piping, and uses the high-temperature fluid.
A nuclear facility, wherein the cooling facility according to claim 6 is applied to cooling a cooling target in the facility.