JP2007205912A - Water level measurement device of differential pressure type - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water level measurement equipment of a differential pressure type capable of continuing operation with the other correct system even if an accident such as instrument trouble is caused, by eliminating the deviation between the regular system and the emergency system in the constitution of providing on either of regular system and emergency system with a level switch. <P>SOLUTION: The water level measurement equipment of the differential pressure type comprises: vapor phase detection piping 102; liquid phase detection piping 103; a vapor phase side diaphragm 114; the liquid phase side diaphragm 115; a regular differential pressure detection system of the differential pressure detector 120 for detecting the water level of drain water level of a vessel 101 from the difference of the vapor phase side pressure and the liquid phase side pressure; the emergency differential pressure detection system of same constitution; and the level switch 130 for alarming high water level outputting connected by the upper detection piping 121 and the lower detection piping 122 between the piping 102 mutually connected with the vapor phase detection piping, and piping 103 mutually connected with the liquid phase detection piping, wherein the length from the vapor discharge port to the pressure receiving surface of each vapor phase side diaphragm 114 and the length from the vapor discharge port to the pressure receiving surface of each vapor phase side diaphragm 114 and from the liquid discharge port to pressure receiving surface of each liquid side diaphragm 115 are made set equal. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a differential pressure type water level measuring device, and more particularly to a differential pressure type water level measuring device that detects a drain water level inside various tanks in a power plant.

  As a device for measuring the drain water level in a container such as a tank, a diaphragm type differential pressure type water level measuring device is known. This type of differential-pressure-type water level measuring device is, for example, an upper detection pipe at a gas outlet facing the gas phase of a heater with a feed water heater provided in a feed water system connecting a pressure vessel and a turbine in a power plant as a measurement target. Connect the lower detection pipe to the liquid outlet that faces the liquid phase of the heater, connect each detection pipe to the diaphragm via the flange, and connect the pressure detection silicon through the capillary tube filled with silicon. Then, each diaphragm is connected to a differential pressure detector, and the water level in the feed water heater is measured by the differential pressure detector based on the difference between the gas phase pressure and the liquid phase pressure (see Patent Document 1).

  Further, in each tank of the power plant, a plurality of water level measuring devices are installed in the same tank so as to be multiplexed as a normal / emergency system.

  However, even if various tanks of a power plant are generally measured and a plurality of water level measuring devices are simply installed at one detection seat in the same tank, the length of the normal detection pipe and the emergency detection pipe If the length is different, the temperature in the tank and the temperature in the detection pipe are different due to the difference in the pipe length, so that the internal pressure fluctuates, and the measured value may vary with the fluctuation of the internal pressure.

  As a measure to improve this, in a piping configuration in which multiple water level measuring devices are installed at one detection seat, branching into a normal system / emergency system in the middle of the detection pipe and system separation is performed,・ The detection pipe length to the emergency diaphragm pressure receiving surface is set to be the same to prevent the internal pressure from fluctuating due to the difference in the length of the normal and emergency detection pipes, resulting in deviations in measured values. A system configuration has been proposed (see, for example, Patent Document 2).

Japanese Patent Application Laid-Open No. 07-218316 (Pages 3-5, FIGS. 1 and 12) Japanese Patent Laying-Open No. 2005-233830 (pages 5, 6 and 1)

  To prevent the plant operation from being hindered due to blockage caused by foreign matter in the detection seat, malfunction or blockage of the detection source valve, and blockage of the common part of the normal / emergency system after the detection source valve, depending on the power plant In addition to separating the normal system and the emergency system, it is also possible to envisage a structure in which a detection seat is provided separately and multiplexed to make the detection piping configuration independent. However, in this case, since the policy of Patent Document 2 is incompatible, the branch structure of Patent Document 2 cannot be adopted.

  In addition, a structure is proposed in which one level switch is installed in a pipe that is branched and connected in the middle of the detection pipe of the water level measuring device in order to issue tank level high warning information and prompt the plant operator in the central operation room to perform manual operation. Has been. This level switch is generally provided in an emergency water level measuring device.

  If the level switch is installed only in the emergency system among the normal / emergency system detection pipes, the length and capacity of the normal / emergency system detection pipes are different. The temperature inside the detection pipe was different, and the internal pressure fluctuated, and there was a risk that deviations would occur in the indicator values of the water level measuring devices for the normal and emergency systems as the internal pressure fluctuated.

  The object of the present invention is to eliminate the deviation of the water level indication value between the normal system and the emergency system in a configuration with a level switch, and continue operation with normal instruments of other systems even if an event such as instrument failure occurs It is to provide a possible differential pressure type water level measuring device.

  In order to solve the above-mentioned problems, the present invention stores drainage by being inserted into a steam passage, the inside is separated into a gas phase and a liquid phase, and a gas exhaust port facing the gas phase and a liquid exhaust facing the liquid phase. In the differential pressure type water level measurement device that measures the water level of the container in which the outlet is formed, the gas phase detection pipe connected to the gas discharge port of the container via the upper detection valve, and the lower detection source to the liquid discharge port of the container A liquid phase detection pipe that is valve-connected via a valve, a gas phase side diaphragm that introduces fluid from the gas phase detection pipe and displaces according to the pressure of the gas phase, and a liquid that introduces fluid from the liquid phase detection pipe A liquid-phase diaphragm that is displaced according to the pressure of the phase, and a differential pressure detector that detects the drain level of the container from the difference between the pressure associated with the displacement of the gas-phase diaphragm and the pressure associated with the displacement of the liquid-phase diaphragm A common differential pressure detection system and an upper detection source at the gas outlet of the container The gas phase detection piping connected via the liquid, the liquid phase detection piping connected to the liquid discharge port of the container via the lower detection source valve, and the fluid is introduced from the gas phase detection piping to respond to the gas phase pressure. Displacement of the gas phase side diaphragm, liquid phase diaphragm that displaces according to the pressure of the liquid phase by introducing a fluid from the liquid phase detection piping, pressure due to displacement of the gas phase side diaphragm, and displacement of the liquid phase side diaphragm An emergency differential pressure detection system consisting of a differential pressure detector that detects the drain water level of the container from the difference between the pressure and the normal differential pressure detection system and the emergency differential pressure detection system downstream from each upper detection source valve Detection between the pipe connecting the gas phase detection pipes and the pipe connecting the liquid phase detection pipes of the normal differential pressure detection system and the emergency differential pressure detection system downstream from the lower detection valve Water level high warning connected by piping and lower detection piping A differential pressure type water level measuring device equipped with an output level switch and set the length from the gas discharge port to the pressure receiving surface of each gas phase side diaphragm and the length from the liquid discharge port to the pressure receiving surface of each liquid phase side diaphragm are the same. Propose.

  According to the present invention, the normal system and the emergency system are multiplexed from the detection point to separate the system, and the level switch is provided without being biased to either the normal system or the emergency system. There is no deviation in the water level indication value. Moreover, even if a failure occurs in one system instrument, the operation can be continued with a normal instrument in the other system. Therefore, more accurate water level measurement and control is possible, and the safety of the entire plant can be improved.

  Next, an embodiment of a differential pressure type water level measuring apparatus according to the present invention will be described with reference to FIGS.

  FIG. 1 is a block diagram showing a system configuration of Embodiment 1 of a differential pressure type water level measuring apparatus according to the present invention. In the first embodiment, in order to detect the drain water level in the tank 101 in a multiplexed state, the normal system and the emergency system are separated and connected to the tank 101, and the same for the normal system and the emergency system. Since the configuration is symmetric using members, the reference numerals are omitted for the emergency system.

  The tank 101 that is a measurement target of the differential pressure type water level measuring apparatus according to the first embodiment is, for example, a container that is inserted into a steam passage to a turbine of a nuclear power plant to store drainage. The inside of the tank 101 is separated into a gas phase and a liquid phase, a gas discharge port that faces the gas phase is formed on the upper side of the tank 101, and a liquid discharge port that faces the liquid phase is formed on the lower side. .

  An upper detection pipe 102 is connected to the gas discharge port of the tank 101 as a gas phase detection pipe, and an upper detection source valve 104 is provided in the middle of the upper detection pipe 102. On the other hand, a lower detection pipe 103 is connected to the liquid discharge port of the tank 101 as a liquid phase detection pipe, and a lower detection source valve 105 is provided in the middle of the lower detection pipe 103.

  A normal instrument upper detection pipe 109 is connected to the end of the upper detection pipe 102, and a normal instrument lower detection pipe 110 is connected to the end of the lower detection pipe 103. A midway of the normal instrument upper detection pipe 109 and a midway of the normal instrument lower detection pipe 110 are connected via a communication pipe 111.

  An upper instrument stop valve 106 is inserted in the middle of the instrument upper detection pipe 109, and a lower instrument stop valve 107 is inserted in the middle of the instrument lower detection pipe 110. An upper test valve 108 is connected to the instrument upper detection pipe 109.

  An upper diaphragm (gas phase side diaphragm) 114 is connected to the upper detection pipe 109 of the normal system via an upper flange 112, and an upper water filling / upper drain valve 116 and an upper capillary tube 118 are connected to the upper diaphragm 114. Has been. The upper capillary tube 118 is connected to the differential pressure detector 120.

  On the other hand, the normal instrument-side lower detection pipe 110 is connected to a lower diaphragm (liquid phase diaphragm) 115 via a lower flange 113, and the lower diaphragm 115 is connected to a lower water filling / lower drain valve 117. The differential pressure detector 120 is connected via the lower capillary tube 119.

  A fluid on the gas phase side in the tank 101 is introduced into the upper diaphragm 114 via the upper detection pipe 102 and the upper detection pipe 109, and each of the upper diaphragms 114 is displaced according to the pressure of the gas phase. When the pressure of the gas phase is received by each upper diaphragm 114, the pressure accompanying the displacement of each upper diaphragm 114 is detected by a differential pressure detector via the pressure transmission sealing liquid (silicon) sealed in the upper capillary tube 118. 120.

  On the other hand, the liquid in the tank 101 is introduced into the lower diaphragm 115 via the lower detection pipe 103 and the upper detection pipe 110, and each lower diaphragm 115 is displaced according to the pressure of the liquid phase. When the pressure of the liquid phase is received by each diaphragm 115, the pressure accompanying this pressure reception is transmitted to the differential pressure detector 120 via the pressure transmitting sealing liquid (silicon) sealed in the lower capillary tube 119.

  The differential pressure detector 120 measures the drain water level in the tank 101 from the difference between the pressure associated with the displacement of the upper diaphragm 114 and the pressure associated with the displacement of the lower diaphragm 115. When the measured value of the drain water level indicates that the drain is excessive, the drain valve in the tank 101 is opened and the drain in the tank 101 is discharged.

  When configuring a normal system and an emergency system, the length from the gas discharge port to the pressure receiving surface of each upper diaphragm 114 and the length from the liquid discharge port to the pressure receiving surface of each lower diaphragm 115 are made the same. It is desirable. In the first embodiment, the pipe lengths of the upper detection pipes 102 and 109 and the lower detection pipes 103 and 110 are the same in the normal system and the emergency system.

  Further, the service system and the emergency system are arranged symmetrically and are directly connected to a liquid discharge port and a liquid discharge port provided independently in the tank 101.

  As a result, it is possible to suppress the deviation that occurs in the measured value (indicated value) with the pressure fluctuation at the time of starting the plant or changing the load, and to prevent the measured value from becoming abnormal with the deviation of the measured value.

  In the first embodiment, the level switch 130 for issuing the water level high alarm information of the tank 101 to the plant operator in the central operation room (not shown) and prompting the manual operation is provided by the upper detection pipe 102 for the normal system and the upper part of the emergency system. It is installed across the pipe connecting the detection pipe 102 and the pipe connecting the lower detection pipe 103 of the normal system and the lower detection pipe 103 of the emergency system.

  That is, the upper detection pipe 102 between the upper detection valve 104 of the normal system and the upper instrument stop valve 106 and the upper detection pipe 102 between the upper detection valve 104 of the emergency system and the upper instrument stop valve 106 Are connected by piping, and the upper detection piping 121 for level switches is connected in the middle of the connecting piping. A lower detection pipe 103 between the lower detection source valve 105 of the normal system and the lower instrument stop valve 107 and a lower detection pipe 103 between the lower detection source valve 105 of the emergency system and the lower instrument stop valve 107 are connected. The level switch lower detection pipe 122 is connected to the middle of the connection pipe.

  The gas introduced in the level switch upper detection pipe 121 is condensed in the level switch communication pipe 125 via the level switch upper instrument stop valve 123. The liquid introduced through the level switch lower detection pipe 122 enters the level switch 130 via the level switch lower gauge stop valve 124 and the level switch communication pipe 125 and the level switch lower detection pipe 129. . The level switch 130 indirectly measures the drain water level inside the tank 101 by a float that moves up and down according to the liquid level of the liquid introduced through the level detection lower detection pipe 122. The level switch upper detection valve 126 is provided with a level switch upper test valve 126, and the level switch lower detection pipe 122 is provided with a level switch lower test valve 127.

  The differential pressure type water level measuring device for measuring the water level in the tank 101 has a symmetrical piping configuration, the same volume, and the same length in both the normal system and the emergency system.

  Since the level switch 130 has a configuration independent of the normal system and the emergency system, even if a malfunction occurs in any one of the systems, the upper detection valve 104, the lower detection valve 105, the upper instrument on the malfunction side If the stop valve 106 and the lower instrument stop valve 107 are closed and disconnected, the water level measurement and level monitoring can be continued with the remaining normal system and the level switch 130.

  In the first embodiment, before starting the plant, the upper water filling / upper drain valve 116 and the lower water filling / lower drain valve 117 are opened, and water is injected into the upper detection pipe 109 and the lower detection pipe 110 to fill the water. Thus, it is possible to prevent the upper diaphragm 114 and the lower diaphragm 115 from being corroded by high-temperature steam, and hydrogen permeation to the upper diaphragm 114 and the lower diaphragm 115 can be prevented.

  In addition, when the generator is operated after startup, steam is introduced into the upper detection pipe 109 and the lower detection pipe 110, and the steam naturally dissipates and condenses, and water is always secured in these pipes. Therefore, it is possible to prevent the upper diaphragm 114 and the lower diaphragm 115 from being corroded by high-temperature steam, and the hydrogen permeation to the upper diaphragm 114 and the lower diaphragm 115 can be prevented.

  In the first embodiment, the pressure deviation of the pressure receiving portion of the service / emergency system and the steam flowing into the detection pipe and the amount of steam condensation are the same in the service system and the emergency system. Even when the load fluctuates, it is possible to suppress the deviation of the instrument indication value.

  Also, even if one instrument is operated due to instrument failure, etc., if the upper detector valve, lower detector valve, upper instrument stop valve, and lower instrument stop valve on the defective side are closed and disconnected, Water level measurement and level monitoring can be continued with the remaining normal system and level switch.

  FIG. 2 is a block diagram showing a system configuration of Embodiment 2 of the differential pressure type water level measuring apparatus according to the present invention.

  In the second embodiment, the upper detection pipe 102 between the upper detection valve 104 of the normal system and the upper instrument stop valve 106 in the first embodiment and the upper detection pipe 104 to the upper instrument stop valve 106 of the emergency system are used. Two upper switch stop valves 123 for level switches are additionally installed in the pipe connecting the upper detection pipe 102 between them, and the lower detection pipe between the lower detection source valve 105 and the lower instrument stop valve 107 of the normal system is installed. 103 and two lower switch stop valves 124 for level switches are installed in the pipe connecting the emergency detection lower detection source valve 105 to the lower instrument stop valve 107. This is an example in which a system in which a defect has occurred is more clearly separated.

  In the first embodiment, if any one of the systems malfunctions, it is necessary to close and disconnect the upper detection source valve 104, the lower detection source valve 105, the upper instrument stop valve 106, and the lower instrument stop valve 107 on the failure side. there were.

  On the other hand, in the second embodiment, if the upper instrument stop valve 123 for the level switch and the lower instrument stop valve 124 for the level switch are closed, the upper detector valve 104, the lower detector valve 105, Regardless of the state of the upper instrument stop valve 106 and the lower instrument stop valve 107, the faulty system can be disconnected, and the water level measurement and level monitoring can be continued with the remaining normal system and level switches.

  FIG. 3 is a block diagram showing a system configuration of Embodiment 3 of the differential pressure type water level measuring apparatus according to the present invention.

  In the third embodiment, a balance pipe is installed between the upper detection pipe 102 and the lower detection pipe 103 of the first embodiment, and a pipe connecting the normal balance pipe and the emergency balance pipe at the upper portion is provided. As in the second embodiment, two level switch upper instrument stop valves 123 are additionally installed, and the level switch lower instrument stop valve is connected to a pipe connecting the normal balance pipe and the emergency balance pipe at the lower part. This is an embodiment in which two additional 124 are installed to more clearly separate the system in which a problem has occurred.

  In the third embodiment, since the balance pipes are installed in the normal system and the emergency system, respectively, the heads of the tank 101 and the two balance pipes coincide with each other. It is possible to further suppress the deviation that occurs in the measurement value (instruction value) with the fluctuation, and to prevent the measurement value from becoming abnormal with the deviation of the measurement value.

  Similarly to the second embodiment, if the upper instrument stop valve 123 for the level switch and the lower instrument stop valve 124 for the level switch are closed, the upper detector valve 104, the lower detector valve 105, and the upper instrument stop valve are closed. Regardless of the state of the valve 106 and the lower instrument stop valve 107, the system in which a problem has occurred can be disconnected, and water level measurement and level monitoring can be continued with the remaining normal system and level switches.

  FIG. 4 is a block diagram showing a system configuration of Embodiment 4 of the differential pressure type water level measuring apparatus according to the present invention.

  The fourth embodiment is an embodiment in which the service system and the emergency system are completely separated, and the level detection system is directly connected to the tank 101. That is, the level switch upper detection pipe 121 is connected to the upper part of the tank 101 via the level switch upper detection source valve 131, and the level switch lower detection pipe 122 is connected to the tank 101 via the level switch lower detection source valve 132. Connect to the bottom of the.

  In the fourth embodiment, since the normal system, the emergency system, and the level detection system are completely separated, even if a malfunction occurs in any one of the systems, the upper detection source valve 104 on the malfunctioning side, If the detection source valve 105 is closed and disconnected, water level measurement and level monitoring can be continued with the remaining normal system and the level switch 130.

  The first to fourth embodiments described so far are effective when it is possible to secure a space or the like in which the level detection system can be installed without being biased to either the normal system or the emergency system.

  However, in an existing plant or the like, there may be a case where the level detection system cannot be installed without being biased to either the normal system or the emergency system.

  Examples 5 to 7 described below are solutions when the level detection system must be installed in an emergency system due to some restrictions.

  FIG. 5 is a block diagram showing a system configuration of Embodiment 5 of the differential pressure type water level measuring apparatus according to the present invention.

  In the fifth embodiment, when the level detection system cannot be directly connected to the tank 101 as in the fourth embodiment of FIG. 4, the level detection system is arranged side by side in the emergency system, and the upper detection pipe becomes an unbalanced arrangement. In this embodiment, an electric heater 133 is attached to the upper detection pipe 102 and the upper detection pipe 121 for the level switch.

  In the fifth embodiment, because of an unbalanced arrangement, an electric heater 133 is attached to a portion where the deviation of the water level indication value is likely to occur between the normal system and the emergency system, and the upper detection pipe 102 and the level switch upper detection pipe 121 are attached. Since the inside is maintained at the same temperature as the internal state of the tank 101, the water level can be measured more accurately even when the plant is started or when a sudden load change occurs.

  FIG. 6 is a block diagram showing a system configuration of Embodiment 6 of the differential pressure type water level measuring apparatus according to the present invention.

  In the sixth embodiment, the temperature detector 134 inside the tank 101 and the upper detection pipe 102 and the level switch upper detection pipe 121 according to the temperature inside the tank 101 detected by the temperature detector 134 are added to the configuration of the fifth embodiment. It is the Example which added the control apparatus 135 which controls the electric power supply to the electric heater 133 which heats.

  The control device 135 takes in the internal temperature of the tank 101 from the temperature detector 134, controls the heating amount of the electric heater 133 through the interlock 136, and stores the inside of the upper detection pipe 102 and the level switch upper detection pipe 121 in the tank 101. Maintain the same temperature as the internal state.

  In the sixth embodiment, the control device 135 maintains the inside of the upper detection pipe 102 and the level switch upper detection pipe 121 at the same temperature as the internal state of the tank 101. Therefore, even at the time of plant start-up or sudden load fluctuation, The water level can be measured more accurately.

  FIG. 7 is a block diagram showing a system configuration of a seventh embodiment of the differential pressure type water level measuring apparatus according to the present invention.

  In the seventh embodiment, instead of the electric heater in the fifth embodiment shown in FIG. 5, steam traces 137 are respectively provided on the upper detection pipe 102 and the upper detection pipe 102 + level switch upper detection pipe 121 that are unbalanced. It is the attached Example.

  In the case of the seventh embodiment, a steam trace 137 is attached to a portion where a deviation in the water level indication value is likely to occur between the normal system and the emergency system due to an unbalanced arrangement, and the upper detection pipe 102 and the upper detection pipe 121 for the level switch. Since the inside is maintained at the same temperature as the internal state of the tank 101, the water level can be measured more accurately even when the plant is started or when a sudden load change occurs.

It is a block diagram which shows the system | strain structure of Example 1 of the differential pressure type water level measuring device by this invention. It is a block diagram which shows the system | strain structure of Example 2 of the differential pressure type water level measuring device by this invention. It is a block diagram which shows the system | strain structure of Example 3 of the differential pressure type water level measuring device by this invention. It is a block diagram which shows the system | strain structure of Example 4 of the differential pressure type water level measuring device by this invention. It is a block diagram which shows the system | strain structure of Example 5 of the differential pressure type water level measuring device by this invention. It is a block diagram which shows the system | strain structure of Example 6 of the differential pressure type water level measuring device by this invention. It is a block diagram which shows the system | strain structure of Example 7 of the differential pressure type water level measuring device by this invention.

Explanation of symbols

101 Tank 102 Upper detection pipe 103 Lower detection pipe 104 Upper detection source valve 105 Lower detection source valve 106 Upper instrument stop valve 107 Lower instrument stop valve 108 Test valve 109 Instrument side upper detection pipe 110 Instrument side lower detection pipe 111 Communication pipe 112 Upper part Flange 113 Lower flange 114 Upper diaphragm 115 Lower diaphragm 116 Upper water filling / upper drain valve 117 Lower water filling / lower drain valve 118 Upper capillary tube 119 Lower capillary tube 120 Differential pressure detector 121 Upper detection pipe 122 for level switch Lower detection for level switch Piping 123 Upper instrument stop valve for level switch 124 Lower instrument stop valve for level switch 125 Communication pipe for level switch 126 Upper test valve for level switch 127 Lower test valve for level switch 1 8 level switch side upper detection pipe 129 level switch side lower detection pipe 130 level switch 131 for level switch upper detection source valve 132 level switch for the lower detection source valve 133 electric heater 134 temperature detectors 135 control device 136 interlock 137 Steam tracing

Claims (7)

Measures the water level of a container that is inserted into a vapor passage to store drainage, the inside is separated into a gas phase and a liquid phase, and a gas outlet that faces the gas phase and a liquid outlet that faces the liquid phase are formed. In the differential pressure type water level measuring device,
A gas phase detection pipe connected to the gas discharge port of the container via an upper detection source valve, a liquid phase detection pipe connected to the liquid discharge port of the container via a lower detection source valve, and the gas phase A gas phase diaphragm that introduces fluid from the detection pipe and displaces according to the pressure of the gas phase; and a liquid phase diaphragm that introduces fluid from the liquid phase detection pipe and displaces according to the pressure of the liquid phase; A differential pressure detection system comprising a differential pressure detector for detecting a drain water level of the container from a difference between a pressure associated with the displacement of the gas phase side diaphragm and a pressure associated with the displacement of the liquid phase side diaphragm;
A gas phase detection pipe connected to the gas discharge port of the container via an upper detection source valve, a liquid phase detection pipe connected to the liquid discharge port of the container via a lower detection source valve, and the gas phase detection A gas phase diaphragm that introduces fluid from a pipe and displaces according to the pressure of the gas phase; a liquid phase diaphragm that introduces fluid from the liquid phase detection pipe and displaces according to the pressure of the liquid phase; An emergency differential pressure detection system comprising a differential pressure detector for detecting the drain water level of the container from the difference between the pressure associated with the displacement of the gas phase side diaphragm and the pressure associated with the displacement of the liquid phase side diaphragm;
A pipe connecting gas phase detection pipes of the common differential pressure detection system and the emergency differential pressure detection system downstream from each upper detection source valve, and the common differential pressure detection system downstream from each lower detection source valve And a water level high alarm output level switch connected by an upper detection pipe and a lower detection pipe between the pipes connecting the liquid phase detection pipes of the emergency differential pressure detection system,
The differential pressure type water level measurement characterized in that the length from the gas outlet to the pressure receiving surface of each gas phase side diaphragm and the length from the liquid outlet to the pressure receiving surface of each liquid phase side diaphragm are set to be the same. apparatus. In the differential pressure type water level measuring device according to claim 1,
Connect the upper detection pipe of the water level high alarm output level switch to the pipe connecting the gas pressure detection pipes of the common differential pressure detection system and the emergency differential pressure detection system via an upper instrument stop valve,
A lower detection pipe of the level switch for high water level alarm output is connected to a pipe connecting liquid phase detection pipes of the normal differential pressure detection system and the emergency differential pressure detection system via a lower instrument stop valve. Differential pressure type water level measuring device. Measures the water level of a container that is inserted into a vapor passage to store drainage, the inside is separated into a gas phase and a liquid phase, and a gas outlet that faces the gas phase and a liquid outlet that faces the liquid phase are formed. In the differential pressure type water level measuring device,
A gas phase detection pipe connected to the gas discharge port of the container via an upper detection source valve, a liquid phase detection pipe connected to the liquid discharge port of the container via a lower detection source valve, and the gas phase A balance pipe that connects the detection pipe and the liquid phase detection pipe, a gas phase side diaphragm that introduces a fluid from the gas phase detection pipe and displaces according to the pressure of the gas phase, and a fluid that is introduced from the liquid phase detection pipe Then, the drain level of the container is detected from the difference between the liquid phase diaphragm that is displaced according to the pressure of the liquid phase, and the pressure that accompanies the displacement of the gas phase diaphragm and the pressure that accompanies the displacement of the liquid phase diaphragm. A common differential pressure detection system comprising a differential pressure detector,
A gas phase detection pipe connected to the gas discharge port of the container via an upper detection source valve, a liquid phase detection pipe connected to the liquid discharge port of the container via a lower detection source valve, and the gas phase detection A balance pipe that connects the pipe and the liquid phase detection pipe, a gas phase side diaphragm that introduces a fluid from the gas phase detection pipe and displaces according to the pressure of the gas phase, and a fluid that is introduced from the liquid phase detection pipe And detecting the drain water level of the container from the difference between the liquid phase diaphragm that is displaced according to the pressure of the liquid phase, and the pressure that accompanies the displacement of the gas phase diaphragm and the pressure that accompanies the displacement of the liquid phase diaphragm. An emergency differential pressure detection system comprising a differential pressure detector;
A pipe in which the balance pipes of the common differential pressure detection system and the emergency differential pressure detection system are connected to each other through an upper instrument stop valve, and the common differential pressure detection system and the emergency use through a lower instrument stop valve A water level high alarm output level switch connected between the upper detection pipe and the lower detection pipe between the differential pressure detection system balance pipes connected at the lower part,
The differential pressure type water level measurement characterized in that the length from the gas outlet to the pressure receiving surface of each gas phase side diaphragm and the length from the liquid outlet to the pressure receiving surface of each liquid phase side diaphragm are set to be the same. apparatus. Measures the water level of a container that is inserted into a vapor passage to store drainage, the inside is separated into a gas phase and a liquid phase, and a gas outlet that faces the gas phase and a liquid outlet that faces the liquid phase are formed. In the differential pressure type water level measuring device,
A gas phase detection pipe connected to the gas discharge port of the container via an upper detection source valve, a liquid phase detection pipe connected to the liquid discharge port of the container via a lower detection source valve, and the gas phase A gas phase diaphragm that introduces fluid from the detection pipe and displaces according to the pressure of the gas phase; and a liquid phase diaphragm that introduces fluid from the liquid phase detection pipe and displaces according to the pressure of the liquid phase; A differential pressure detection system comprising a differential pressure detector for detecting a drain water level of the container from a difference between a pressure associated with the displacement of the gas phase side diaphragm and a pressure associated with the displacement of the liquid phase side diaphragm;
A gas phase detection pipe connected to the gas discharge port of the container via an upper detection source valve, a liquid phase detection pipe connected to the liquid discharge port of the container via a lower detection source valve, and the gas phase detection A gas phase diaphragm that introduces fluid from a pipe and displaces according to the pressure of the gas phase; a liquid phase diaphragm that introduces fluid from the liquid phase detection pipe and displaces according to the pressure of the liquid phase; An emergency differential pressure detection system comprising a differential pressure detector for detecting the drain water level of the container from the difference between the pressure associated with the displacement of the gas phase side diaphragm and the pressure associated with the displacement of the liquid phase side diaphragm;
A water level high alarm output level switch connected to the container by an upper detection pipe and a lower detection pipe,
The differential pressure type water level measurement characterized in that the length from the gas outlet to the pressure receiving surface of each gas phase side diaphragm and the length from the liquid outlet to the pressure receiving surface of each liquid phase side diaphragm are set to be the same. apparatus. Measures the water level of a container that is inserted into a vapor passage to store drainage, the inside is separated into a gas phase and a liquid phase, and a gas outlet that faces the gas phase and a liquid outlet that faces the liquid phase are formed. In the differential pressure type water level measuring device,
A gas phase detection pipe connected to the gas discharge port of the container via an upper detection source valve, a liquid phase detection pipe connected to the liquid discharge port of the container via a lower detection source valve, and the gas phase A gas phase diaphragm that introduces fluid from the detection pipe and displaces according to the pressure of the gas phase; and a liquid phase diaphragm that introduces fluid from the liquid phase detection pipe and displaces according to the pressure of the liquid phase; A differential pressure detection system comprising a differential pressure detector for detecting a drain water level of the container from a difference between a pressure associated with the displacement of the gas phase side diaphragm and a pressure associated with the displacement of the liquid phase side diaphragm;
A gas phase detection pipe connected to the gas discharge port of the container via an upper detection source valve, a liquid phase detection pipe connected to the liquid discharge port of the container via a lower detection source valve, and the gas phase detection A gas phase diaphragm that introduces fluid from a pipe and displaces according to the pressure of the gas phase; a liquid phase diaphragm that introduces fluid from the liquid phase detection pipe and displaces according to the pressure of the liquid phase; An emergency differential pressure detection system comprising a differential pressure detector for detecting the drain water level of the container from the difference between the pressure associated with the displacement of the gas phase side diaphragm and the pressure associated with the displacement of the liquid phase side diaphragm;
For water level high alarm output connected via an upper instrument stop valve and a lower instrument stop valve between a gas phase detection pipe and a liquid phase detection pipe of the normal differential pressure detection system or the emergency differential pressure detection system With level switch,
The length from the gas discharge port to the pressure receiving surface of each gas phase side diaphragm and the length from the liquid discharge port to the pressure receiving surface of each liquid phase side diaphragm are set to be the same,
A differential pressure type water level measuring device, wherein an electric heater is provided in a gas phase detection pipe of the normal differential pressure detection system and the emergency differential pressure detection system. Measures the water level of a container that is inserted into a vapor passage to store drainage, the inside is separated into a gas phase and a liquid phase, and a gas outlet that faces the gas phase and a liquid outlet that faces the liquid phase are formed. In the differential pressure type water level measuring device,
A gas phase detection pipe connected to the gas discharge port of the container via an upper detection source valve, a liquid phase detection pipe connected to the liquid discharge port of the container via a lower detection source valve, and the gas phase A gas phase diaphragm that introduces fluid from the detection pipe and displaces according to the pressure of the gas phase; and a liquid phase diaphragm that introduces fluid from the liquid phase detection pipe and displaces according to the pressure of the liquid phase; A differential pressure detection system comprising a differential pressure detector for detecting a drain water level of the container from a difference between a pressure associated with the displacement of the gas phase side diaphragm and a pressure associated with the displacement of the liquid phase side diaphragm;
A gas phase detection pipe connected to the gas discharge port of the container via an upper detection source valve, a liquid phase detection pipe connected to the liquid discharge port of the container via a lower detection source valve, and the gas phase detection A gas phase diaphragm that introduces fluid from a pipe and displaces according to the pressure of the gas phase; a liquid phase diaphragm that introduces fluid from the liquid phase detection pipe and displaces according to the pressure of the liquid phase; An emergency differential pressure detection system comprising a differential pressure detector for detecting the drain water level of the container from the difference between the pressure associated with the displacement of the gas phase side diaphragm and the pressure associated with the displacement of the liquid phase side diaphragm;
For water level high alarm output connected via an upper instrument stop valve and a lower instrument stop valve between a gas phase detection pipe and a liquid phase detection pipe of the normal differential pressure detection system or the emergency differential pressure detection system With level switch,
The length from the gas discharge port to the pressure receiving surface of each gas phase side diaphragm and the length from the liquid discharge port to the pressure receiving surface of each liquid phase side diaphragm are set to be the same,
An electric heater, a temperature detector inside the container, and an amount of electric power supplied to the electric heater according to the detected temperature inside the container, in a gas phase detection pipe of the common differential pressure detection system and the emergency differential pressure detection system A differential pressure type water level measuring device characterized by comprising a control device for controlling the pressure. Measures the water level of a container that is inserted into a vapor passage to store drainage, the inside is separated into a gas phase and a liquid phase, and a gas outlet that faces the gas phase and a liquid outlet that faces the liquid phase are formed. In the differential pressure type water level measuring device,
A gas phase detection pipe connected to the gas discharge port of the container via an upper detection source valve, a liquid phase detection pipe connected to the liquid discharge port of the container via a lower detection source valve, and the gas phase A gas phase diaphragm that introduces fluid from the detection pipe and displaces according to the pressure of the gas phase; and a liquid phase diaphragm that introduces fluid from the liquid phase detection pipe and displaces according to the pressure of the liquid phase; A differential pressure detection system comprising a differential pressure detector for detecting a drain water level of the container from a difference between a pressure associated with the displacement of the gas phase side diaphragm and a pressure associated with the displacement of the liquid phase side diaphragm;
A gas phase detection pipe connected to the gas discharge port of the container via an upper detection source valve, a liquid phase detection pipe connected to the liquid discharge port of the container via a lower detection source valve, and the gas phase detection A gas phase diaphragm that introduces fluid from a pipe and displaces according to the pressure of the gas phase; a liquid phase diaphragm that introduces fluid from the liquid phase detection pipe and displaces according to the pressure of the liquid phase; An emergency differential pressure detection system comprising a differential pressure detector for detecting the drain water level of the container from the difference between the pressure associated with the displacement of the gas phase side diaphragm and the pressure associated with the displacement of the liquid phase side diaphragm;
For water level high alarm output connected via an upper instrument stop valve and a lower instrument stop valve between a gas phase detection pipe and a liquid phase detection pipe of the normal differential pressure detection system or the emergency differential pressure detection system With level switch,
The length from the gas discharge port to the pressure receiving surface of each gas phase side diaphragm and the length from the liquid discharge port to the pressure receiving surface of each liquid phase side diaphragm are set to be the same,
A differential pressure type water level measuring apparatus, wherein a steam trace is provided in a gas phase detection pipe of the normal differential pressure detection system and the emergency differential pressure detection system.

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