JP6429501B2 - Water supply control device and water supply device - Google Patents

Description

  The present invention relates to a water supply control device and a water supply device for supplying a coolant to a steam generator provided in a nuclear facility.

  Conventionally, for example, a water supply device described in Patent Document 1 is provided in a water supply pipe connected to a steam generator and a water supply pipe in order to supply a coolant to a steam generator provided in a nuclear facility. A water supply valve with a large rated capacity, a bypass pipe connected to the water supply pipe on the upstream side and downstream side of the water supply valve, a bypass valve provided in the bypass pipe and having a smaller rated capacity than the water supply valve, and a water supply flow rate And a control device. The feed water flow control device communicated to the feed water valve, the feed water valve via the main feed valve control signal selector, and the main feed valve feed water flow controller, bypass valve, bypass valve, communicated via the bypass feed valve control signal switch A bypass water supply valve water supply flow rate controller, and both water supply flow rate controllers and a switch for both, and a water supply valve automatic switching control device adapted to receive a water supply flow rate signal are provided. The water supply valve automatic switching control device temporally generates a valve closing control signal for decreasing the flow rate of one of the water supply valve and the bypass valve at a constant rate and a valve opening control signal for increasing the other flow rate at a constant rate. It is generated in parallel, and is configured to control the water supply valve and the bypass valve at the same time so as to minimize the fluctuation of the total water supply flow rate.

  In the conventional water supply flow rate control device described above, when switching from a water supply valve to a bypass valve, a switching command signal is first output and input to a main water supply valve control signal switch and a bypass water supply valve control signal switch, and an automatic switching control device The internal connection state is switched so that the valve opening degree adjustment signal from is input to the water supply valve and the bypass valve, respectively. Then, the valve opening degree adjustment signal for the bypass valve rises from 0% (fully closed) to a target value calculated from the main water supply valve control signal in the automatic control state at a previously adjusted rate of change. When the valve opening adjustment signal is applied to the bypass valve, the valve starts to open with a predetermined delay, and the valve lift increases following the valve opening adjustment signal. When the actual opening start of the bypass valve is detected from the valve lift as a bypass feed valve opening detection signal, a valve opening adjustment signal for decreasing the valve opening to 0% (fully closed) at a pre-adjusted rate of change. It is output and applied to the water supply valve via the main water supply valve control signal switching unit. The valve lift of the water supply valve follows the valve opening adjustment signal with a delay. The valve opening adjustment signal keeps the target value for a predetermined time after reaching the target value until the actual valve opening catches up. Then, the valve opening adjustment signal rises or falls according to the deviation between the feed water flow signal stored at the start of switching and the feed water flow signal at the time when the target value is maintained. Switch to automatic control state.

JP-A-10-253007

  The water supply valve and the bypass valve are not used at the same time, and one valve is closed and the other valve is opened. When switching these valves, one valve in the closed state is shifted to the open state, and the other valve in the open state is shifted to the closed state. One valve that is shifted to the open state opens to a target valve opening degree that is equal to the flow rate of the coolant in the other valve. In addition, since one valve that is shifted to the open state may be closed and stuck, the other valve is closed after confirming the opening operation of one valve. Each valve performs an opening operation and a closing operation in parallel with each other so as to minimize a temporary increase / decrease in the flow rate so as to suppress fluctuations in the flow rate of the coolant.

  When switching between these valves, an opening operation signal is output to one of the valves due to changes in torque that presses the valve against the valve seat, or changes in the displacement speed of the diaphragm in the case of pneumatic control valves. There may be a change in the follow-up time from the start to the opening operation. In this case, if the follow-up time is long, the opening speed of one of the valves increases so as to catch up with the output signal until the target valve opening is reached. On the other hand, if the follow-up time is short, the valve opening operation speed becomes slow. On the other hand, the other valve that shifts to the closed state outputs a closing operation signal when the opening operation of one of the valves starts, and closes at a constant speed according to this operation signal. As a result, if the follow-up time becomes longer, the overflow that the water supply flow rate when one of the valves is opened will tend to increase transiently compared to before switching, the deviation of the supply water flow rate becomes excessive, and an alarm is issued. Cause.

  This invention solves the subject mentioned above, and aims at providing the water supply control apparatus and water supply apparatus which can suppress the fluctuation | variation of the water supply flow volume at the time of switching of a valve.

  In order to achieve the above-described object, a water supply control device according to a first aspect of the present invention includes a water supply pipe for supplying fluid, a water supply valve provided in the water supply pipe, and an upstream side and a downstream side of the water supply valve. For a water supply apparatus comprising a bypass pipe connected to a water supply pipe and a bypass valve provided in the bypass pipe and having a rated capacity different from that of the water supply valve, the water supply valve and the bypass valve are switched and controlled. From the time when an opening operation signal with a predetermined target valve opening is output to one valve in the closed state until the time when the operation start signal indicating that the one valve has started opening is input The following operation time is obtained, and on the basis of the operation start signal, the closing operation signal is output to the other valve in the open state and the closing operation signal is output until the other valve is closed. Set the time according to the follow-up time And wherein the door.

  According to this water supply control device, the closing operation signal is sent to the other valve in the open state according to the follow-up time from when the opening operation signal is output to the one valve in the closing state until the one valve starts the opening operation. Since the closing operation time until the other valve is closed after output is set, even if there is a change in the follow-up time until one valve starts to open, the other valve corresponding to this changes. By obtaining this closing operation time, it is possible to perform control for suppressing fluctuations in the feed water flow rate when the valve is switched.

  Further, the water supply control device of the second invention is characterized in that, in the first invention, the target valve opening of the one valve is obtained based on the valve opening of the other valve in the open state.

  According to this water supply control device, by obtaining the target valve opening degree of one valve after switching based on the valve opening degree of the other valve that is the switching source, the water supply flow rate before and after switching is obtained. The same can be done.

  The water supply control device according to a third aspect of the present invention is the first or second aspect of the invention, from the output of the opening operation signal based on the follow-up time until the one valve reaches the target valve opening. The opening operation time is obtained, and the closing operation time of the other valve is set based on the opening operation time.

  According to this water supply control device, based on the follow-up time from when the opening operation signal is output to one valve to when the one valve starts the opening operation, the one valve The opening operation time until the target valve opening is reached is subtracted, and the closing operation time of the other valve is set from this opening operation time. As a result, it is possible to appropriately set the closing operation time of the other valve for performing the control for suppressing the fluctuation of the feed water flow rate when the valve is switched.

  The water supply control device according to a fourth aspect of the present invention is the water supply control device according to any one of the first to third aspects, wherein the water supply valve and the bypass valve of the water supply device are pneumatic control valves.

  Pneumatic control valves tend to easily change in the follow-up time from when an opening operation signal is output to when the opening operation starts due to diaphragm displacement or the like. For this reason, according to this water supply control apparatus, control corresponding to the pneumatic control valve can be performed to suppress fluctuations in the water supply flow rate when the valve is switched.

  In order to achieve the above object, a water supply apparatus according to a fifth aspect of the present invention includes a water supply pipe for supplying fluid, a water supply valve provided in the water supply pipe, and an upstream side and a downstream side of the water supply valve. In a water supply apparatus comprising a bypass pipe connected to a pipe and a bypass valve provided in the bypass pipe and having a rated capacity different from that of the water supply valve, the water supply valve and the bypass valve are switched and controlled. The said water supply control apparatus as described in any one of claim | item 1 -4 is provided.

  According to this water supply device, the closing operation signal is output to the other valve in the open state in accordance with the follow-up time from when the opening operation signal is output to the one valve in the closing state until the one valve starts the opening operation. Since the closing operation time from when the other valve is closed to the other valve is set, even if there is a change in the follow-up time until one of the valves starts to open, the other valve will respond accordingly. By obtaining the closing operation time, it is possible to suppress fluctuations in the feed water flow rate when the valve is switched.

  ADVANTAGE OF THE INVENTION According to this invention, the fluctuation | variation of the feed water flow rate at the time of switching of a valve can be suppressed.

FIG. 1 is a schematic configuration diagram of a nuclear facility provided with a water supply apparatus according to an embodiment of the present invention. FIG. 2 is a time chart showing a valve switching operation in the water supply control device according to the embodiment of the present invention. FIG. 3 is a time chart showing a conventional valve switching operation as compared with the water supply control device according to the embodiment of the present invention. FIG. 4 is a time chart showing fluctuations in the feed water flow rate when the valves are switched.

  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.

  FIG. 1 is a schematic configuration diagram of a nuclear facility provided with a water supply apparatus according to the present embodiment. The nuclear facility 1 has a nuclear reactor 2. As the nuclear reactor 2, for example, a pressurized water reactor (PWR) is used. A nuclear facility 1 using this pressurized water reactor 2 includes a reactor cooling system (primary cooling system) 100 including the reactor 2 and a turbine system (secondary cooling system) 200 that exchanges heat with the reactor cooling system 100. It consists of. In the reactor cooling system 100, a primary coolant flows, and in the turbine system 200, a secondary coolant (coolant) flows.

  The reactor cooling system 100 has a steam generator 4 connected to the reactor 2 via a cold leg 3a and a hot leg 3b. The hot leg 3b is provided with a pressurizer 5, and the cold leg 3a is provided with a primary coolant pump 6. The reactor 2, the cold leg 3 a, the hot leg 3 b, the steam generator 4, the pressurizer 5, and the primary coolant pump 6 are accommodated in the reactor containment vessel 7.

  The nuclear reactor 2 is a pressurized water nuclear reactor as described above, and the inside is filled with the primary coolant. The primary coolant is light water in which boron used as a neutron moderator is dissolved. The nuclear reactor 2 contains a large number of fuel assemblies 8 therein, and a large number of control rods 9 for controlling the nuclear fission of the fuel assemblies 8 are removably provided in the fuel assemblies 8. ing.

  A series of operations in the reactor cooling system 100 of the nuclear facility 1 will be described. When the fuel assembly 8 is fissioned in the nuclear reactor 2 while controlling the fission reaction by the control rod 9, thermal energy is generated by the fission. When the primary coolant in the nuclear reactor 2 is heated by this thermal energy, the heated primary coolant is sent to the steam generator 4 through the hot leg 3b by the primary coolant pump 6. The high temperature primary coolant passing through the hot leg 3b is pressurized by the pressurizer 5 to suppress boiling, and flows into the steam generator 4 in a state of high temperature and pressure. The high-temperature and high-pressure primary coolant flowing into the steam generator 4 is cooled by exchanging heat with the secondary coolant, and the cooled primary coolant is passed through the cold leg 3a by the primary coolant pump 6 to the nuclear reactor. Sent to 2. Then, the cooled primary coolant flows into the reactor 2, so that the reactor 2 is cooled. Thus, the primary coolant circulates between the nuclear reactor 2 and the steam generator 4.

  The turbine system 200 includes a turbine 12 connected to the steam generator 4 via the steam pipe 11, a condenser 13 connected to the turbine 12, and a water supply pipe 14 connecting the condenser 13 and the steam generator 4. A water supply pump 15 interposed between the two. The turbine 12 is connected to a generator 16.

  A series of operations in the turbine system 200 of the nuclear facility 1 will be described. When steam flows from the steam generator 4 into the turbine 12 via the steam pipe 11, the turbine 12 rotates. When the turbine 12 rotates, the generator 16 connected to the turbine 12 generates power. Thereafter, the steam flowing out of the turbine 12 flows into the condenser 13. The condenser 13 has a cooling pipe 17 disposed therein, and one of the cooling pipes 17 is connected to a water intake pipe 18 for supplying cooling water (for example, seawater). A drain pipe 19 for draining the cooling water is connected to. The condenser 13 cools the steam flowing in from the turbine 12 by the cooling pipe 17, thereby returning the steam to a liquid. The secondary coolant that has become liquid is sent to the steam generator 4 via the water supply pipe 14 by the water supply pump 15. The secondary coolant sent to the steam generator 4 becomes steam again by exchanging heat with the primary coolant in the steam generator 4.

  In the nuclear facility 1 described above, the secondary coolant is supplied toward the steam generator 4 while the flow rate is controlled by the water supply device 40 including the water supply pipe 14 and the water supply pump 15.

  As shown in FIG. 1, the water supply device 40 is connected to the water supply pipe 14 by bypassing the water supply pipe 14, the water supply pump 15, the water supply valve 42 provided in the water supply pipe 14, and the water supply valve 42. Bypass pipe 43, bypass valve 44 provided in bypass pipe 43, water supply valve operation detector 45 that detects the operation of water supply valve 42, and bypass valve operation detector 46 that detects the operation of bypass valve 44. . The water supply device 40 is controlled by a water supply control device 51.

  The water supply valve 42 is provided on the downstream side of the water supply pump 15 in the water supply pipe 14. The water supply valve 42 is a pneumatic control valve and has a larger rated capacity than the bypass valve 44. One end of the bypass pipe 43 is connected to the water supply pipe 14 on the upstream side of the water supply valve 42, and the other end is connected to the water supply pipe 14 on the downstream side of the water supply valve 42. The bypass valve 44 is provided in the bypass pipe 43. The bypass valve 44 is a pneumatic control valve similar to the water supply valve 42, but has a smaller rated capacity than the water supply valve 42. The water supply valve 42 and the bypass valve 44 are not limited to pneumatic control valves, and may be electric or hydraulic.

  The water supply valve operation detector 45 is, for example, a limit switch provided on an operation shaft that operates the valve body in the water supply valve 42, and the valve body is moved by the movement of the operation shaft, and the water supply valve 42 is operated. Is detected. The bypass valve operation detector 46 is, for example, a limit switch provided on an operating shaft that operates the valve body in the bypass valve 44, and that the bypass body 44 is operated by moving the operating body due to the movement of the operating shaft. Is detected.

  The water supply control device 51 comprehensively controls the water supply device 40. The water supply control device 51 is connected to the water supply valve operation detector 45 and the bypass valve operation detector 46, and is further connected to the water supply valve 42 and the bypass valve 44. The water supply control device 51 switches the water supply valve 42 and the bypass valve 44 by controlling the water supply valve 42 and the bypass valve 44 based on inputs from the water supply valve operation detector 45 and the bypass valve operation detector 46. Water supply control to the steam generator 4 is performed.

  FIG. 2 is a time chart showing a valve switching operation in the water supply control device according to the present embodiment. FIG. 3 is a time chart showing a conventional valve switching operation compared with the water supply control device according to the present embodiment. FIG. 4 is a time chart showing fluctuations in the feed water flow rate when the valves are switched.

  Here, the water supply control in which the bypass valve 44 is controlled to be in the open state and the water supply valve 42 is not controlled to be closed in the water supply control device 51 is referred to as a water supply bypass system. On the other hand, the water supply control in which the water supply control device 51 controls the water supply valve 42 in the open state and does not control the bypass valve 44 in the closed state is referred to as a water supply system. In the switching between the water supply bypass system and the water supply system, the water supply control device 51 that receives a switching signal by an operator switching operation (switching switch operation) controls the switching of each valve. The timing of switching between the feed water bypass system and the feed water system is when the desired feed water flow rate is covered by the valve opening of each valve, that is, when the feed water flow rate is within the set feed water flow rate.

  2 to 4 show a case where the water supply bypass system in which the bypass valve 44 is opened and the water supply valve 42 is closed is switched to the water supply system.

  As shown in FIG. 2, the water supply control device 51 of the present embodiment has a valve opening (for example, 60% valve opening) α in the open state of the bypass valve 44 at this time when T0 is input as a switching signal. Based on the target valve opening (for example, 30% valve opening) of the water supply valve 42 in the closed state, the target value β is obtained. Then, the water supply control device 51 opens the water supply valve 42 at a constant speed during the time T0-TE from the opening operation signal 0 of the water supply valve 42 to the target value β. However, as shown in FIG. 2 and FIG. 3, the opening of the water supply valve 42 is caused by changes in the torque that presses the valve body against the valve seat in the water supply valve 42 or the displacement of the diaphragm in the case of a pneumatic control valve. There may be a change in the follow-up time A1, A2, A3 from the output of the operation signal to the time T1, T2, T3 when the feed valve opening detector 45 detects the start of the feed valve opening operation. In such a case, as shown in FIG. 2 and FIG. 3, the water supply valve 42 has an opening operation time B1 from the start of each opening operation T1, T2, T3 to the target valve opening β due to a change in the follow-up time. , B2 and B3 are different.

  Here, as shown in FIG. 3, in the conventional valve switching operation compared with the water supply control device 51 according to the present embodiment, each opening operation start time when the opening operation start signal is input from the water supply valve operation detector 45. The bypass valve 44 starts closing operation according to the closing operation signals CS1 ′, CS2 ′, CS3 ′ based on T1, T2, T3. The closing operation signals CS1 ', CS2', and CS3 'are the same signal, and the closing operation time of the bypass valve 44 from the opening operation start time T1, T2, T3 to the valve opening 0 is the same. For this reason, as shown in FIG. 4, the water supply starts from the opening operation start time T1, T2, T3 when the opening operation start signal is input from the water supply valve operation detector 45 and is switched from the bypass valve 44 to the water supply valve 42. As shown by the solid line, it is preferable that the flow rate does not fluctuate from the feed water flow before switching the valve, but even if the opening operation start time is delayed, the closing operation start time is the same, so the feed water flow rate during switching tends to increase. Overshoot (indicated by a dashed line in FIG. 4).

  Therefore, as shown in FIG. 2, the water supply control device 51 of the present embodiment indicates that the water supply valve 42 has started to open from T0 when an opening operation signal for setting the target valve opening β is output to the water supply valve 42. When the operation start signal is input from the water supply valve operation detector 45, follow-up times A1, A2, A3 to T1, T2, T3 are acquired.

  Furthermore, the water supply control device 51 obtains the opening operation times B1, B2, B3 from the follow-up times A1, A2, A3 until the water supply valve 42 reaches the target valve opening β, that is, the water supply valve 42 has the valve opening 0. The follow-up times A1, A2, A3 are subtracted from the time T0-TE until the target valve opening β is reached to obtain the opening operation times B1, B2, B3.

  Furthermore, the water supply control device 51 sets the closing operation times C1, C2, and C3 of the bypass valve 44 based on the opening operation times B1, B2, and B3. Then, based on the operation start signal, the closing operation signals CS1, CS2, and CS3 corresponding to the closing operation times C1, C2, and C3 are output to the bypass valve 44 to close the bypass valve 44.

  Specifically, as shown in FIG. 4, the closing operation signals CS1, CS2, and CS3 start from the opening operation start time T1, T2, T3 when the opening operation start signal is input from the water supply valve operation detector 45, and the bypass valve The fluctuation in the feed water flow rate from 44 to the feed valve 42 is such that the fluctuation in the feed water flow rate decreases as shown by the solid line. In other words, in the conventional water supply control device, as the opening operation start time is delayed, the closing operation time is delayed, so that the water supply flow rate during the valve switching increased compared to the water supply flow rate before the valve switching. Even if the opening operation start signal is input lately (for example, at the time of opening operation start T3), the closing operation signal CS3 is output, and the bypass valve 44 is closed during a relatively short closing operation time C3. As shown, the fluctuation of the feed water flow rate is suppressed.

  When switching from a water supply system in which the water supply valve 42 is open and the bypass valve 44 is closed to the water supply bypass system, the same switching control is performed by switching the operation of the water supply valve 42 and the operation of the bypass valve 44. Can be done.

  As described above, the water supply control device 51 of the present embodiment includes the water supply pipe 14 that supplies the coolant (fluid), the water supply valve 42 provided in the water supply pipe 14, and the upstream side and the downstream side of the water supply valve 42. The water supply device 40 includes a bypass pipe 43 connected to the water supply pipe 14 and a bypass valve 44 provided in the bypass pipe 43 and having a rated capacity different from that of the water supply valve 42. 44, and when an open operation signal OS1 with a predetermined target valve opening β is output to one of the closed valves, the operation starts that one of the valves has started to open from T0. When inputting the signal, the follow-up times A1, A2, A3 to T1, T2, T3 are acquired, while the closing operation signals CS1, CS2, CS3 are output to the other valve in the open state based on the operation start signal and closed. Operation signal CS1, C 2, CS3 other valve from the output of the sets in response to the closing operation time C1, C2, C3 the following time A1, A2, A3 until closed.

  According to this water supply control device 51, the other in the open state depends on the follow-up times A1, A2, A3 from when the open operation signal OS1 is output to one valve in the closed state until the one valve starts to open. Since the closing operation time C1, C2, C3 from when the closing operation signal CS1, CS2, CS3 is output to the other valve until the other valve is closed is set, until one of the valves starts to open Even if there is a change in the follow-up times A1, A2, A3, the control for suppressing fluctuations in the feed water flow rate at the time of switching the valve is obtained by obtaining the closing operation times C1, C2, C3 of the other valve according to this change. It can be carried out.

  Moreover, the water supply control apparatus 51 of this embodiment calculates | requires the target valve opening degree (beta) in one valve based on the valve opening degree (alpha) in the open state of the other valve.

  According to this water supply control device 51, the target valve opening β in one of the valves after switching is obtained based on the valve opening α of the other valve that is the switching source, so that before and after switching. The feed water flow rate can be made similar.

  Further, the water supply control device 51 of the present embodiment is based on the follow-up times A1, A2, A3, and the opening operation time B1, from when the opening operation signal OS1 is output until the one valve reaches the target valve opening β. B2 and B3 are obtained, and the closing operation times C1, C2, and C3 of the other valve are set based on the opening operation times B1, B2, and B3.

  According to this water supply control device 51, based on the follow-up times A1, A2, and A3 from when the opening operation signal OS1 is output to one valve until the one valve starts opening operation, the opening operation signal OS1 is set. It is obtained by subtracting the opening operation times B1, B2, B3 from when the output is made until the one valve reaches the target valve opening degree β, and the closing operation times C1, C2 of the other valve are obtained from the opening operation times B1, B2, B3. , C3. As a result, it is possible to appropriately set the closing operation time C1, C2, C3 of the other valve for performing the control for suppressing the fluctuation of the feed water flow rate when the valve is switched.

  In the water supply control device 51 of the present embodiment, the water supply valve 42 and the bypass valve 44 of the water supply device 40 are pneumatic control valves.

  The pneumatic control valve tends to easily change in the follow-up times A1, A2, and A3 from when the opening operation signal OS1 is output to when the opening operation starts T1, T2, and T3 due to the displacement of the diaphragm. For this reason, according to the water supply control device 51 of the present embodiment, control corresponding to the pneumatic control valve can be performed to suppress fluctuations in the water supply flow rate when the valve is switched.

  Further, the water supply device 40 of the present embodiment includes a water supply pipe 14 for supplying a coolant (fluid), a water supply valve 42 provided in the water supply pipe 14, and a water supply pipe 14 on the upstream side and the downstream side of the water supply valve 42. A bypass pipe 43 connected to the bypass pipe 43, a bypass valve 44 provided in the bypass pipe 43 and having a rated capacity different from that of the water supply valve 42, and the water supply control device 51 described above for switching and controlling the water supply valve 42 and the bypass valve 44. And comprising.

  According to the water supply device 40, the other open state is output according to the follow-up times A1, A2, and A3 from when the open operation signal OS1 is output to the one closed valve until the one valve starts to open. Since the closing operation time C1, C2, C3 from when the closing operation signals CS1, CS2, CS3 are output to the valve until the other valve is closed is set, the one valve starts to open. Even if the follow-up times A1, A2 and A3 change, by obtaining the closing operation times C1, C2 and C3 of the other valve according to this change, fluctuations in the feed water flow rate at the time of switching the valve can be suppressed. .

DESCRIPTION OF SYMBOLS 14 Water supply pipe 15 Water supply pump 40 Water supply apparatus 42 Water supply valve 43 Bypass pipe 44 Bypass valve 45 Water supply valve action | operation detector 46 Bypass valve action | operation detector 51 Water supply control apparatus

Claims (5)

A water supply pipe for supplying fluid;
A water supply valve provided in the water supply pipe;
A bypass pipe connected to the water supply pipe at an upstream side and a downstream side of the water supply valve;
A bypass valve provided in the bypass pipe and having a different rated capacity compared to the water supply valve;
A water supply control device for switching and controlling the water supply valve and the bypass valve,
One of acquiring a follow-up time from when an opening operation signal for setting a predetermined target valve opening is output to one valve in the closed state to when an operation start signal indicating that the one valve has started opening operation is input Based on the operation start signal, the closing operation signal is output to the other valve in the open state and the closing operation time from when the closing operation signal is output until the other valve is in the closed state is determined according to the follow-up time. The water supply control device characterized by setting.   The water supply control device according to claim 1, wherein the target valve opening degree of the one valve is obtained based on a valve opening degree of the other valve in an open state. Based on the follow-up time, an opening operation time from when the operation start signal is input until the one valve reaches the target valve opening is obtained, and the closing of the other valve is performed based on the opening operation time. The water supply control device according to claim 1, wherein an operation time is set.   The water supply control device according to any one of claims 1 to 3, wherein the water supply valve and the bypass valve of the water supply device are pneumatic control valves. A water supply pipe for supplying fluid;
A water supply valve provided in the water supply pipe;
A bypass pipe connected to the water supply pipe at an upstream side and a downstream side of the water supply valve;
A bypass valve provided in the bypass pipe and having a different rated capacity compared to the water supply valve;
In a water supply apparatus comprising:
A water supply apparatus comprising the water supply control apparatus according to any one of claims 1 to 4, wherein the water supply valve and the bypass valve are switched and controlled.

Images