KR102610621B1 - Integrated pipe pressure control system for multiple pipeline - Google Patents

Abstract

The present invention relates to an integrated water impact control system, and more specifically, to a system capable of integratedly controlling the piping pressures of multiple adjacent pipes having different pressures using one pressure tank. The integrated pipe pressure control system for multiple pipes according to the present invention includes a first pipe; a second pipe adjacent to the first pipe; a pressure tank connected to the first pipe through a first connection pipe and connected to the second pipe through a second connection pipe; It is installed in the second connection pipe and includes a pressure maintenance valve that maintains the pressure in the second pipe above the set pressure.

Description

Integrated pipe pressure control system for multiple pipes {INTEGRATED PIPE PRESSURE CONTROL SYSTEM FOR MULTIPLE PIPELINE}

The present invention relates to an integrated water impact control system, and more specifically, to a system capable of integratedly controlling the piping pressures of multiple adjacent pipes having different pressures using one pressure tank.

In general, most piping systems, such as open piping systems such as water supply piping or closed circulation piping systems such as district heating and cooling piping, are equipped with water shock prevention equipment. Water shock generally refers to a transient condition that occurs in a water piping system where the flow rate and pressure change rapidly in the event of a sudden stop of a pump or sudden closing of a valve, and is also called water hammer. As a result of this water impact, the pressure inside the pipe increases rapidly depending on the shape of the pipe due to the propagation of a pressure wave due to a sudden change in flow within the pipe, or the pressure inside the pipe falls below the saturated vapor pressure of water, generating vapor. In the process of subsequent recombination (column separation & return), shock waves may cause collapse or damage to the pipeline.

In general, the types of water impact phenomena can be classified according to the form in which pressure changes rapidly at any point in the piping system. In other words, it can be classified into cases where the pressure within the pipe rapidly increases (high pressure, upsurge) and cases where the pressure rapidly decreases (low pressure, downsurge). Typically, in order to prevent high pressure in piping, a method of discharging fluid from the piping system by installing a relief valve, safety valve, or pump control valve is used to prevent low pressure. For this purpose, a method of introducing air or fluid into the piping system using an air/vacuum valve or a one way feed tank is used.

Meanwhile, a pressure tank such as a sealed air chamber is used as a device to prevent both high and low pressure. In normal times, the inside of the pressure tank is filled with a certain amount of fluid (water) and air in balance (NWL; NORMAL WATER LEVER), and the pressure tank is branched and connected to the main pipe through a connection pipe. When a pump that pressurizes and transports fluid (water) to the main pipe suddenly stops, the change in flow within the pipe varies depending on the type of pump and the shape of the main pipe. If the pressure in the main pipe suddenly decreases, negative or low pressure in the main pipe may occur. To prevent this, the pressure is compensated as the fluid stored in the pressure tank is discharged to the main pipe through the connection pipe. If the pressurized fluid flows back along the main pipe and the pressure in the main pipe increases, the fluid flows into the pressure tank through the connection pipe. Because the shock wave is rapidly reduced by the contraction of air, a compressible fluid, the pressure in the main pipe is lowered and damage to the main pipe and pump due to the impact of the pressure wave can be prevented.

For this function of the pressure tank, the conventional water shock prevention system is equipped with equipment such as a level sensor, air compressor, air filter, filling valve, exhaust valve, and control panel to control the appropriate water level and pressure inside the pressure tank. Includes.

These water shock prevention systems are usually installed individually for each independent pipe. Accordingly, auxiliary facilities such as pressure tanks, level sensors, air compressors, air filters, filling valves, exhaust valves, and control panels are installed in each pipe, resulting in high production and installation costs.

Registered Utility Model No. 20-0456211

The present invention was created to solve the problems of the conventional water shock prevention device as described above, and uses one set of pressure tank and auxiliary facilities to reduce the costs of manufacturing, installing, and maintaining the pressure tank and other auxiliary facilities. Therefore, the task is to provide a system that can integratedly control the pressure of different adjacent pipes.

A system for integrated piping pressure control of multiple pipes according to the present invention for solving the problems described above includes a first pipe; a second pipe adjacent to the first pipe; a pressure tank connected to the first pipe through a first connection pipe and connected to the second pipe through a second connection pipe; It is installed in the second connection pipe and includes a pressure maintenance valve that maintains the pressure in the second pipe above the set pressure.

Here, a bypass pipe is connected in parallel to the second connection pipe, and the bypass pipe is equipped with a check valve that controls fluid to flow in only one direction from the second pipe to the pressure tank, and a relief valve instead of the check valve. may be provided.

In addition, it is preferable that the second connection pipe is further provided with a control valve that closes after a certain period of time when the second pump for pressurizing and transferring fluid to the second pipe is stopped.

The control valve is connected in series with the pressure maintenance valve, and is preferably an electrically controlled valve that opens when electricity is applied and closes when electricity is cut off.

In addition, the control valve is connected to an uninterruptible power supply (UPS), and is closed using the power of the uninterruptible power supply (UPS) after a certain period of time when the pump is stopped.

Meanwhile, the first pipe is a relatively high-pressure fire-fighting pipe, and the second pipe is a relatively low-pressure irrigation pipe, and it is preferable that the control valve is blocked to prevent fluid from being discharged into the second pipe in an emergency situation.

According to the present invention as described above, instead of installing water impact devices (pressure tanks and auxiliary facilities) individually in a plurality of different adjacent pipes, one set of pressure tanks and auxiliary facilities is used to connect different adjacent pipes. It has the outstanding advantage of reducing the costs of manufacturing, installing, and maintaining water shock prevention devices by integratedly controlling the pressure.

1 is a first preferred embodiment of the integrated pipe pressure control system for multiple pipes according to the present invention;
Figure 2a is a second preferred embodiment of the integrated pipe pressure control system for multiple pipes according to the present invention;
Figure 2b is a second preferred embodiment of the integrated pipe pressure control system for multiple pipes according to the present invention;
Figure 3 is a diagram showing a third preferred embodiment of the integrated pipe pressure control system for multiple pipes according to the present invention.

Hereinafter, the configuration and operation of the integrated pipe pressure control system for multiple pipes according to the present invention will be described in detail with reference to the attached drawings and preferred embodiments.

First, as shown in FIG. 1, the multi-pipe pipe pressure integrated control system according to the first preferred embodiment of the present invention includes a first pipe 10, a second pipe 20, a pressure tank 5, and pressure maintenance. Includes valve 25.

The first pipe 10 and the second pipe 20 are independent pipes adjacent to each other, and may be general open water supply pipes or closed circulation pipes such as district cooling and heating pipe systems (indicated by dotted lines). In addition, it is preferable that the first pipe 10 and the second pipe 20 are pipes with different pipe pressures, where the pipe pressure of the first pipe 10 is relative to the pipe pressure of the second pipe 20. Set to high pressure. For example, the first pipe 10 may be a relatively high-pressure fire-fighting pipe, and the second pipe 20 may be a relatively low-pressure irrigation water pipe for supplying water to lawns, etc. As described below, there must be a difference in piping pressure between the two pipes so that fluid (pipe water) can be smoothly discharged from the pressure tank 5 to the second pipe 20 when low pressure occurs in the second pipe 20. .

More specifically, as shown in FIG. 1, the first pipe 10 includes a first pump 11 that pressurizes and supplies fluid, and the fluid is pressurized from the first pump 11 to supply the first pipe 10. A first main valve 12 is provided to prevent backflow of the fluid being transported or to regulate the flow of the fluid. Likewise, the second pipe 20 includes a second pump 21 that pressurizes and supplies fluid, and prevents backflow of the fluid pressurized from the second pump 21 and transported along the second pipe 20 or prevents the fluid from flowing. A second main valve 22 is provided to regulate the flow. Accordingly, in normal times, fluid is independently transported through the first pipe 10 and the second pipe 20 by the pressurizing action of the first pump 11 and the second pump 21, respectively.

A pressure tank 5 is connected to the first pipe 10 and the second pipe 20. The pressure tank 5 is a means for controlling when a change in pipe pressure occurs in the first pipe 10 and the second pipe 20 due to expansion or contraction of pipe water or water shock, etc. When the piping pressure of the pipe 10 or the second pipe 20 rises (high pressure, upsurge), fluid is accepted to relieve the pressure, and when the piping pressure falls (low pressure, downsurge), the fluid is discharged. Maintain the pipe pressure at an appropriate level. The structure and operating method of the pressure tank 5 are already known and further detailed description will be omitted.

As already mentioned above, in general, in different independent pipes, a separate pressure tank (5) is provided for each pipe. On the other hand, in the present invention, one pressure tank 5 is commonly connected to the first pipe 10 and the second pipe 20, which are different adjacent pipes. Specifically, as shown in FIG. 1, the pressure tank 5 is connected to the first pipe 10 by a first connection pipe 14, and is connected to the second pipe 10 by a second connection pipe 24. 20).

A pressure maintenance valve 25 is installed in the second pipe 20. The pressure maintenance valve 25 is a valve that maintains the secondary pressure above the set pressure. In the present invention, the side connected to the pressure tank 5 is defined as the primary side, and the side connected to the second pipe 20 is defined as the secondary side. That is, the pressure maintenance valve 25 operates to maintain the pipe pressure of the second pipe 20 above the set pressure. For example, when the set pressure on the secondary side is set to 5 bar, when the pressure on the secondary side drops below 5 bar, the pressure maintenance valve (25) is opened, allowing pressure to flow from the primary side (pressure tank 5) to the secondary side (second pipe (second pipe) As the fluid is transferred to 20)), the pressure of the second pipe (20) increases, and when the secondary pressure exceeds 5 bar, the pressure maintenance valve (25) is closed, increasing the pressure of the second pipe (20) to 5 bar. Maintain above bar. The pressure maintenance valve 25 may be configured to automatically open and close by the pressure difference between the primary and secondary sides, and may be opened and closed by a separate control unit based on the secondary pressure detected by a separate pressure sensor. It may be configured in the form of:

Here, there is no particular limitation on the type of the pressure maintenance valve 25 as long as it functions to maintain the secondary pressure above the set pressure as above, but it is particularly preferable to be a pressure reducing valve, and a manual valve such as a disk type swing valve or Automatic valves such as electric valves or solenoid valves may also be used.

Therefore, in the first embodiment as shown in FIG. 1, when the pipe pressure in the first pipe 10 increases (high pressure, surge), the first connection pipe 14 is connected from the first pipe 10. Through this, fluid flows into the pressure tank (5) and the high pressure in the first pipe (10) is relieved. At this time, because the second pipe 20 has a relatively low pressure compared to the first pipe 10, the fluid inside the pressure tank 5 can be discharged to the second connection pipe 24, where the pressure maintenance valve ( By the action of 25), if the pressure of the second pipe 20 is less than the set pressure, the fluid is transferred to the second pipe 20, and if it is higher than the set pressure, the transfer of fluid is blocked to reduce the pressure of the second pipe 20. Maintain above the set pressure. On the other hand, when the piping pressure of the first pipe 10 decreases (low pressure, down surge), the fluid inside the pressure tank 5 flows from the pressure tank 5 through the first connection pipe 14 to the first pipe ( 10) and maintained at an appropriate pressure, and at the same time, the pressure in the second pipe 20 is also maintained above the set pressure at all times by the pressure maintenance valve 25. In this way, the pressures of the adjacent first pipe 10 and the second pipe 20 can be integratedly controlled using one pressure tank 5.

Figure 2a shows a configuration diagram of a pipe pressure integrated control system for multiple pipes according to a second preferred embodiment of the present invention. As shown, the system according to the second embodiment adds a bypass pipe 27 and a check valve 28 to the configuration of the first embodiment. Specifically, a bypass pipe 27 is installed in parallel with the pressure maintenance valve 25 in the second connection pipe 24 on which the pressure maintenance valve 25 is installed, and a check valve (27) is installed in the bypass pipe 27. 28) is installed. The check valve 28 controls fluid to flow in only one direction from the second pipe 20 to the pressure tank 5. This is to cope with the case where the piping pressure of the second pipe 20 increases above the set pressure (high pressure, surge).

As mentioned above, since the pressure maintenance valve 25 is installed in the second connection pipe 24, when the piping pressure in the second pipe 20 falls below the set pressure (low pressure, down surge), As the pressure maintenance valve 25 is opened, the fluid stored in the pressure tank 5 is transferred to the second pipe 20 through the second connection pipe 24, thereby relieving the low pressure in the second pipe 20. Meanwhile, when the piping pressure in the second pipe 20 increases above the set pressure (high pressure, surge), the pressure maintenance valve 25 is closed to transfer fluid from the pressure tank 5 to the second pipe 20. Although this is not achieved, since the second connection pipe 24 is closed, there is no way to relieve the pressure inside the second pipe 20. In order to cope with this increase in piping pressure in the second pipe 20, in this second embodiment, the bypass pipe 27 is installed in the second connection pipe 24 to set the piping pressure in the second pipe 20. When the pressure rises above the pressure, the fluid in the second pipe 20 is transferred through the bypass pipe 27 and then flows into the pressure tank 5 through the second connection pipe 24. In addition, when the bypass pipe 27 is always open in both directions, even when the second pipe 20 is in a high pressure state, the second pipe is transferred from the relatively higher pressure first pipe 10 and the pressure tank 5. Since fluid can be transferred to (20), a check valve (28) is installed in the bypass pipe (27) to prevent this, so that the fluid in the first pipe (10) or the pressure tank (5) flows into the second pipe (20). ) was prohibited from being transferred to. Accordingly, when the piping pressure of the second pipe 20 increases and becomes higher than the piping pressure of the first pipe 10, 1 from the second pipe 20 to the pressure tank 5 through the bypass pipe 27. Fluid is transferred only in one direction. In this way, effective integrated control of pressure changes during upsurge and downsurge of the first pipe 10 and the second pipe 20 is possible.

Meanwhile, Figure 2b shows a third preferred embodiment of the present invention. As shown, the bypass pipe 27 may be provided with a relief valve 29 instead of the check valve 28. The relief valve 29 is a valve that opens when the pressure of the fluid rises above the set pressure. It opens when the pressure of the second pipe 20 becomes higher than the piping pressure of the first pipe 10 and opens the bypass pipe ( The fluid in the second pipe 20 is transferred to the pressure tank 5 through 27). Accordingly, it is possible to relieve the high pressure of the second pipe 20.

Figure 3 shows a configuration diagram of a pipe pressure integrated control system for multiple pipes according to a fourth preferred embodiment of the present invention. As shown, in this embodiment, a control valve 26 is additionally provided in the configuration of the first to third embodiments. The control valve 26 is installed for safety purposes in case of failure of the pressure maintenance valve 25 or other errors. It is installed in series with the pressure maintenance valve 25 on the second connector 24, and the pressure maintenance valve 26 is installed in series with the pressure maintenance valve 25. It may be installed either on the primary side or the secondary side of (25). Here, the control valve 26 is preferably configured as a normally closed type electrically controlled valve that opens when electricity is applied and closes when electricity is cut off, such as a solenoid valve.

The control valve 26 basically maintains the open state with electricity applied when the second pump 21 is in a normal operating state, but when the second pump 21 is stopped due to a power outage or other abnormality. It is configured to close after a certain period of time. In general, water shock in pipes occurs when low pressure is temporarily formed on the pump discharge side of the pipe when the pump stops (trips) due to a power outage or pump failure. To prevent water shock due to such pump stoppage, the control valve is installed. (26) is configured to close after a certain period of time when the second pump (21) is stopped due to a power outage or breakdown. In order to resolve the low pressure generated on the discharge side of the second pump (21) of the pipe when the second pump (21) is stopped, fluid must be transferred to the second pipe (20), while fluid continues to flow into the second pipe (20). When transferred, the pressure in the second pipe 20 increases again. When a problem occurs in the pressure maintenance valve 25, the control valve 26 controls the pressure change in the second pipe 20 when the second pump 21 is stopped. The control valve 26 is maintained in an open state for a certain period of time when the second pump 21 is stopped, so that the fluid in the pressure tank 5 flows into the second pipe 20 through the second connection pipe 24. By allowing the transfer, the low pressure in the second pipe 20 is resolved. Next, after a certain period of time, the pipe pressure in the second pipe 20 increases, so the control valve 26 is closed to maintain the pressure in the second pipe 20.

For this purpose, the control valve 26 is maintained in an open state by the system power when the entire system is in operation, and is closed when the system power is turned off due to a power outage (at this time, the second pump 21 is also stopped). It can be configured.

In addition, the control valve 26 is linked in real time with the operation of the second pump 21 and is maintained in an open state when the second pump 21 is operated and remains open for a certain period of time when the second pump 21 is stopped. It may be configured to close after elapse. To this end, the control valve 26 may be configured to control opening and closing through real-time detection of whether the second pump 21 is operating. For this purpose, as shown in FIG. 3, a pump operation detection means 30 that detects in real time whether the second pump 21 is operating may be additionally provided.

The pump operation detection means 30 detects the operating state of the second pump 21 in real time and directly transmits an electric signal to the control valve 26, or a separate control unit (not shown) that controls the control valve 26. and the control valve 26 is opened and closed according to the control command of the control unit. The case where a separate control unit is provided is taken as an example, but in the description and drawings below, the case where the electric signal is received directly from the control valve 26 without a separate control unit and it is opened and closed on its own is used as an example, but no special explanation is provided. It should be interpreted as including both of the above two cases. There is no limit to the type of the pump operation detection means 30 as long as it can detect the operating state of the second pump 21, but it is preferably an auxiliary contact of a magnetic switch, a current meter, a pressure sensor, or a flow sensor.

The magnetic switch is also called an electromagnetic contactor, and is a switch that supplies or blocks power for driving the motor of the second pump 21. It is a type of relay whose contact points are opened and closed by an electromagnet as current is applied or not applied to the internal coil. It is a switch and the contact point has a main contact point and an auxiliary contact point. This magnetic switch is a switch for supplying power to the second pump 21 and is usually provided for automatic control of the piping system. Its configuration and operational relationship are already known, and detailed description will be omitted here.

In the present invention, the auxiliary contact point of this magnetic switch can be used as the pump operation detection means (30). That is, the operation of the second pump 21 is performed by supplying power to the second pump 21 when current is applied to the internal coil of the magnetic switch and the main contact is closed, and when current is not applied to the internal coil. In the main contact point, the power supply to the second pump 21 is stopped, and the second pump 21 is stopped. In this way, when the main contact point is opened and closed, the auxiliary contact point provided in the magnetic switch is also opened and closed. When the auxiliary contact point of the magnetic switch and the control unit are electrically connected, when the second pump 21 is operating, the auxiliary contact point is closed. Therefore, the current signal is transmitted to the control valve 26 and the open state is maintained. On the other hand, when the second pump 21 is stopped, the auxiliary contact is open, so the transmission of the current signal to the control valve 26 is blocked, and the control valve 26 may be closed.

Meanwhile, the pump operation detection means 30 may be a current meter. The current meter is electrically connected to the motor driving the second pump 21 and measures the load current of the motor. The current meter is electrically connected to a separate control unit, or to a microcomputer or a control valve 26 with a built-in relay switch, and the measured load current signal value of the motor is transmitted to the control unit or control valve 26. The control unit or control valve 26 determines that the second pump 21 is operating when the load current signal value of the motor is more than a preset certain value (or 0) and maintains the control valve 26 in an open state, If the load current signal value is less than a preset constant value (or 0), it is determined that the second pump 21 is stopped and the control valve 26 is closed.

Additionally, the pump operation detection means 30 may be a pressure sensor. The pressure sensor detects the pressure on the discharge side of the second pump 21 and outputs it as an electric signal. The pressure sensor is electrically connected to the control unit or to a microcomputer or a control valve 26 with a built-in relay switch, so that a pressure sensing signal is transmitted to the control unit or control valve 26. In general, the operating pressure (total head) of a pump is determined by the sum of the natural water head (static head) of the pipe, pipe friction loss, and radiation pressure. Therefore, when the second pump 21 is operating, the pressure detection signal value detected by the pressure sensor is greater than the natural water head (static head) of the pipe. Therefore, the control unit or control valve 26 determines that the second pump 21 is operating when the pressure detection signal value is greater than the natural water head (constant water head), maintains the control valve 26 in an open state, and maintains the natural water head ( If it is less than the constant head), it is determined to be stopped and the control valve 26 is closed.

Additionally, the pump operation detection means 30 may be a flow sensor. The flow sensor detects the flow rate of water on the discharge side of the second pump 21 and outputs it as an electric signal. The flow sensor is electrically connected to the control unit or to a control valve 26 with a built-in microcomputer or relay switch, so that a flow detection signal is transmitted to the control unit or control valve 26. If the flow rate detection signal value is higher than a preset certain value, the control unit or control valve 26 determines that the second pump 21 is in operation, maintains the control valve 26 in an open state, and maintains the control valve 26 in an open state. If it is less than a certain value, it is determined that the second pump 21 is stopped and the control valve 26 can be closed.

As above, the pump operation detection means 30 detects in real time whether the second pump 21 is operating, and when the second pump 21 is stopped as a result of the detection (low pressure occurs in the second pipe 20), The control valve 26 is closed after a predetermined period of time has elapsed. At this time, the control valve 26 may be configured to close immediately after a certain period of time. For example, in the case of a swing-type valve equipped with a disc, the closing speed of the disc is adjusted to close slowly and then close completely after a certain period of time. It may be configured.

As described above, the control valve 26 is closed when the entire system is shut down or the pump is stopped. In the event of a power outage or the pump is stopped, the electricity applied to the control valve 26 is cut off, so the power for closing the control valve 26 is not available. There may be cases where it is completely blocked. In preparation for this case, an uninterruptible power supply (UPS) is connected to the control valve 26, and accordingly, even in the event of a power outage of the entire system or a pump stop, the control valve 26 is operated using the power of the uninterruptible power supply after a certain period of time. may be closed.

Meanwhile, as shown in FIG. 3, a bypass pipe 27 is connected in parallel to the second connection pipe 24, and the pressure tank 5 is connected to the bypass pipe 27 in the second pipe 20. ) A check valve (28) is installed to move fluid in only one direction. Accordingly, when the piping pressure of the second pipe 20 increases (high pressure, upsurge), the pressure maintenance valve 25 and the control valve 26 are closed, so that the second pipe (27) is closed through the bypass pipe 27. Since the fluid in 20) can be transferred to the pressure tank 5, the high pressure in the second pipe 20 is relieved.

In this way, it is possible to prevent water shock through integrated control of piping pressure in multiple adjacent pipes with one pressure tank.

Meanwhile, as already mentioned above, the first pipe 10 may be a relatively high-pressure fire-fighting pipe, and the second pipe 20 may be a relatively low-pressure irrigation pipe, so that emergency situations such as fire may occur. When a fire occurs and the first pump 11 of the first pipe 10 is activated or the pressure of the first pipe 10 falls below the set pressure, it is necessary to secure sufficient fire-fighting water for fire suppression, etc. , It is preferable that the control valve 26 is blocked to prevent fluid from being discharged into the second pipe 20. That is, the control valve 26 is closed by the operation detection signal of the first pump 11, is electrically connected to a fire detector (not shown) or a fire alarm (not shown), and is automatically blocked in the event of a fire, or is connected to the first pipe 11. It may be configured to block when it is detected that the pressure has dropped below the set pressure by a pressure sensor (not shown) provided in (10).

So far, the present invention has been described in detail based on the embodiments, but the scope of the present invention is not limited thereto, and includes the scope of substantial equivalence to the embodiments of the present invention.

5: pressure tank 10: first pipe
11: first pump 12: first main valve
14: 1st connection pipe 20: 2nd pipe
21: second pump 22: second main valve
24: second connector 25: pressure maintenance valve
26: control valve 27: bypass pipe
28: Check valve 30: Pump operation detection means

Claims (8)

The first conduit (10);
a second pipe (20) adjacent to the first pipe (10);
a pressure tank (5) connected to the first pipe (10) by a first connection pipe (14) and to the second pipe (20) by a second connection pipe (24); and
A pressure maintenance valve 25 installed on the second connection pipe 24 to maintain the pressure of the second pipe 20 above the set pressure,
The first pipe 10 and the second pipe 20 are independent main pipes to supply water to different receiving locations, respectively.
Configured so that the piping pressure in the first pipe 10, where the piping pressure is relatively large, is transmitted to the second pipe 20, where the piping pressure is relatively small, through the pressure tank 5 and the pressure maintenance valve 25. A pipe pressure integrated control system for multiple pipes. According to claim 1,
A bypass pipe 27 is connected in parallel to the second connection pipe 24, and the bypass pipe 27 is configured to allow fluid to flow in only one direction from the second pipe 20 to the pressure tank 5. A piping pressure integrated control system for multiple pipes, characterized in that it is provided with a check valve (28) for controlling. According to claim 1,
A pipe pressure integrated control system for multiple pipes, characterized in that a bypass pipe (27) is connected in parallel to the second connection pipe (24), and the bypass pipe (27) is provided with a relief valve (29). According to any one of claims 1 to 3,
The second connection pipe 24 is further provided with a control valve 26 that closes after a certain period of time when the second pump 21 for pressurizing and transporting the fluid in the second pipe 20 is stopped. Integrated pipe pressure control system for multiple pipes. According to claim 4,
The control valve (26) is a multi-pipe pipe pressure integrated control system, characterized in that it is connected in series with the pressure maintenance valve (25). According to claim 4,
The control valve (26) is an integrated pipe pressure control system for multiple pipes, characterized in that the control valve (26) is an electrically controlled valve that opens when electricity is applied and closes when electricity is cut off. According to claim 6,
The control valve 26 is connected to an uninterruptible power supply (UPS), and is closed using the power of the uninterruptible power supply (UPS) after a certain period of time when the pump is stopped. A pipe pressure integrated control system for multiple pipes. . According to claim 4,
The first pipe 10 is a relatively high-pressure fire-fighting pipe, and the second pipe 20 is a relatively low-pressure irrigation pipe, and a control valve is installed to prevent fluid from being discharged into the second pipe 20 in an emergency situation. (26) A pipe pressure integrated control system for multiple pipes, characterized in that the pipe is blocked.