KR102498854B1 - Resource saving water piping system using ejector effect - Google Patents

Abstract

The present invention relates to a water piping system, and more particularly, to an auxiliary pipe branched from a main pipe at the rear end of a pump and connected to a pressure tank, and after gas is sucked into the auxiliary pipe by an ejector effect, into the pressure tank. It relates to a resource-saving water piping system capable of filling the inside of a pressure tank with gas without a power-driven gas supply device such as a separate air compressor or nitrogen generator.

Description

Resource-saving water piping system using ejector effect {RESOURCE SAVING WATER PIPING SYSTEM USING EJECTOR EFFECT}

The present invention relates to a water piping system, and more particularly, to an auxiliary pipe branched from a main pipe at the rear end of a pump and connected to a pressure tank, and after gas is sucked into the auxiliary pipe by an ejector effect, the inside of the pressure tank It relates to a resource-saving water piping system capable of filling the inside of a pressure tank with gas without a power-driven gas supply device such as a separate air compressor or nitrogen generator.

In the cooling/heating circulation piping system or fluid transfer piping system, it prevents water shock caused by rapid change in flow/velocity in case of sudden stop of pump or sudden closing of valve, or damage to piping system due to expansion/contraction of piping water in circulation piping system. In order to prevent it, a water shock prevention facility or pressure maintenance facility including a pressure tank is provided.

Incompressible fluid and compressible gas coexist inside the pressure tank, and when expansion/contraction or water shock occurs in the piping system, the compressible gas is used to discharge the incompressible fluid inside the pressure tank to the piping system or transfer the incompressible fluid from the piping system to the pressure tank. By introducing it into the interior, it relieves the high pressure generated in the piping system and prevents low or negative pressure.

Through understanding pipe flow, the capacity of the pressure tank is determined, and the amount of compressible gas required inside the pressure tank is also determined. is dissolved and consumed. In addition, the volume of the compressible gas changes according to the pressure of the incompressible fluid in the piping system, which changes the level of the incompressible fluid inside the pressure tank.

Fluctuations in the water level in the pressure tank mean changes in the standard pressure of the entire piping system. When the pressure rises, equipment or piping in the piping system can be damaged. Upon recombination, shockwaves can damage equipment or pipes. Therefore, in order to stably maintain the piping system, the water level of the incompressible fluid inside the pressure tank must be controlled to always be maintained within an appropriate range.

The level control of the pressure tank is performed by filling or exhausting compressed air or a compressible gas such as nitrogen in the pressure tank. That is, as shown in FIG. 1, a level transmitter (LT) or a level switch is installed in the pressure tank 100 connected to the piping system, and the level transmitter (LT) or the level switch adjusts the level of the pressure tank 100 in real time. level is detected. When the water level in the pressure tank 100 rises, the controller 400 opens the filling valve S1 and fills the inside of the pressure tank 100 with compressible gas from the gas supply device 200 such as an air compressor or nitrogen generator so that the incompressible gas is incompressible. The level of the incompressible fluid inside the pressure tank 100 is adjusted by lowering the level of the fluid to an appropriate level, and when the level drops, the exhaust valve S2 is opened to exhaust gas from the pressure tank 100 to the outside to raise the level. is maintained within a preset appropriate range.

As described above, in the conventional water piping system, the water level is adjusted by filling or exhausting compressed air into the pressure tank, but there is a disadvantage that power consumption is very high due to frequent operation of the air compressor according to the water level change. In addition, when nitrogen is used as a filling gas instead of compressed air, a nitrogen bomb or nitrogen generator is used. Even in this case, power consumption due to operation of the nitrogen generator is high and nitrogen consumption is high, so maintenance costs are high.

Republic of Korea Patent No. 10-1069126

The present invention was invented to solve the problems of the conventional water piping system as described above, and to provide a water piping system capable of saving resources by filling the pressure tank with gas without a separate air compressor or nitrogen generator. make it a task

Water piping system according to a preferred embodiment according to the present invention for solving the above problems, and the pump; a main pipe for transporting the fluid pressurized by the pump; a pressure tank branched to the main pipe; an auxiliary pipe branched from the pump discharge side and connected to the pressure tank; and a gas suction unit for sucking gas by the flow of the fluid transported through the auxiliary pipe during operation of the pump and introducing the gas into the auxiliary pipe.

In addition, the water piping system according to another preferred embodiment of the present invention and the pump; a main pipe for transporting the fluid pressurized by the pump; a pressure tank branched to the main pipe; a gas supply device connected to the pressure tank by a filling pipe to supply gas to the pressure tank; an auxiliary pipe branched from the pump discharge side and connected to the filling pipe; and a gas suction unit for sucking gas by the flow of the fluid transported through the auxiliary pipe during operation of the pump and introducing the gas into the auxiliary pipe.

Here, the gas suction unit may include a gas inlet pipe branched from the auxiliary pipe and into which gas flows. The gas suction unit may further include a valve for regulating gas flowing through the gas inlet pipe, wherein the valve is at least one selected from among a check valve, a vacuum cut-off valve, an air valve, an electric valve, and a solenoid valve. it is desirable

In addition, the gas suction part may include a gas inlet formed on one side of the auxiliary pipe to introduce gas. The gas suction unit may further include a valve for regulating gas flowing through the gas inlet, and the valve is at least one selected from among a check valve, a vacuum cut-off valve, an air valve, an electric valve, and a solenoid valve. desirable.

In addition, the gas suction unit may include an ejector having a gas inlet formed on a side thereof. The gas suction unit may further include a valve for regulating gas flowing through the gas inlet, and the valve is at least one selected from among a check valve, a vacuum cut-off valve, an air valve, an electric valve, and a solenoid valve. desirable.

And, the gas suction part may include a venturi formed with a gas inlet on the side. The gas suction unit may further include a valve for regulating gas flowing through the gas inlet, and the valve is at least one selected from among a check valve, a vacuum cut-off valve, an air valve, an electric valve, and a solenoid valve. desirable.

Meanwhile, a sub pump is preferably installed in the auxiliary pipe, and a flow control valve is preferably installed in the main pipe.

In addition, it is preferable that an auxiliary tank is provided at the rear end of the gas suction part of the auxiliary pipe. Here, the auxiliary tank may be composed of a tank formed relatively long in the longitudinal direction, or may be composed of a pipe having a larger diameter than the auxiliary pipe. And, it is preferable that the auxiliary pipe is provided with a first flushing valve for discharging the fluid inside the auxiliary tank and the gas suction part to the outside, and the auxiliary tank is injected with fluid for cleaning the inside of the auxiliary tank and the gas suction part. It is preferable that a second flushing valve is provided for this purpose.

On the other hand, when the water level inside the pressure tank is less than the standard water level range, it is preferable to further include an exhaust valve for exhausting gas inside the pressure tank to the outside.

In addition, an air valve installed at a standard water level point of the pressure tank may be further included to exhaust gas inside the pressure tank to the outside when the water level inside the pressure tank is less than the standard water level range.

In addition, it is preferable to further include a drain valve for discharging the fluid inside the pressure tank to the outside.

In addition, a plurality of the pressure tanks are branched in parallel to the main pipe, and it is preferable that the upper portions of adjacent pressure tanks communicate with each other through a connecting pipe.

According to the present invention as described above, since the rear end of the pump and the pressure tank are connected with an auxiliary pipe, and the gas can be sucked in by the ejector effect and supplied to the pressure tank through the auxiliary pipe, power such as an air compressor or nitrogen generator Since it is possible to fill the pressure tank with gas without having a gas supply device driven by the gas supply device, it has an effect of reducing resources such as cost of manufacturing the gas supply device, driving power and maintenance cost.

1 is a conventional general water piping system configuration diagram;
2 is a schematic diagram of a water piping system according to the present invention;
3 is a block diagram of a water piping system according to a first preferred embodiment of the present invention;
4 is a block diagram of a water piping system according to a second preferred embodiment of the present invention;
5 is a configuration diagram of a water piping system according to a third preferred embodiment of the present invention;
6 is a block diagram of a water piping system according to a fourth preferred embodiment of the present invention;
7 is a configuration diagram of a water piping system according to a fifth preferred embodiment of the present invention;
8 is a block diagram of a water piping system according to a sixth preferred embodiment of the present invention;
9 is a block diagram of a water piping system according to a seventh preferred embodiment of the present invention.

Hereinafter, the configuration and operation of the water piping system using the ejector effect according to the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

As shown in (a) of FIG. 2, the water piping system according to the present invention includes a pump 1, a main pipe 2, and a pressure tank 3 branched from the main pipe 2 as in the conventional pressure system. ), but without a gas supply device driven by power (air compressor, nitrogen generator, nitrogen cylinder, etc.) It is characterized by introducing into.

To this end, the water pipe system according to the present invention includes an auxiliary pipe 5 and a gas suction unit 10. The auxiliary pipe 5 is a pipe that is branched from the discharge side of the pump 1 and transports the fluid to the pressure tank 3, and as shown in FIG. 2 (a), one end of the main pipe 2 The pump (1) is branched to the rear end and the other end is connected to the pressure tank (3), so that the fluid (water) discharged from the pump (1) is branched to the auxiliary pipe (5) during operation of the pump (1) and then to the pressure tank It can be configured to flow into (3). On the other hand, in a general water piping system, as shown in (b) of FIG. 2, a plurality of pumps 1 are arranged in parallel with each other, and a header H by a pump connection pipe 1a at the rear end of each pump 1 ), and a check valve 4 is installed in each pump connection pipe 1a. And, the header (H) is connected to the main pipe (2). In this case, as shown, one end of the auxiliary pipe 5 is connected to the pump connection pipe 1a connecting the pump 1 to the header H, and the other end can be connected to the pressure tank 3 . At this time, the auxiliary pipe 5 is preferably connected to the front side of the check valve 4 of the pump connection pipe 1a. Also, the auxiliary pipe 5 may be connected to only one specific pump connection pipe 1a or may be connected to a plurality of pump connection pipes 1a. A plurality of auxiliary pipes 5 connecting each of the plurality of tank connection pipes 1a and the pressure tank 3 may be provided, and one tank connection pipe 1a and the pressure tank 3 are connected. The auxiliary pipe 5 is installed, but the remaining tank connection pipe 1a may be configured to be connected to a branch pipe branched from the auxiliary pipe 5 installed.

In addition, although not shown, the auxiliary pipe 5 may be configured to be directly connected to the pump 1 without being connected to a pipe such as the main pipe 2 or the pump connection pipe 1a connected to the discharge side of the pump 1. there is. That is, the main pipe 2 and the auxiliary pipe 2 may be connected to each outlet by configuring a plurality of outlets of the pump 1, or a branch connector may be connected to a single outlet of the pump 1 to connect the main pipe 2 and the main pipe 2. Various branch connection structures may be adopted to form a flow path different from the main pipe 2 on the discharge side of the pump 1, such as connecting the auxiliary pipe 2.

As such, in FIG. 2, when the pump 1 is directly connected to the main pipe 2 (a) and the plurality of pumps 1 are connected to the main pipe 2 via the pump connection pipe 1a and the header H Although described in case (b), it is obvious that the pump connection pipe (1a) and the header (H) can be understood as a concept included in the main pipe (2), and unless otherwise specified, in all embodiments to be described later It can be understood that the main pipe 2 includes both the pump connection pipe 1a and the header H portion.

On the other hand, when the auxiliary pipe 5 is connected to the pressure tank 3, as will be described later, the gas (air) sucked from the outside ('outside' means the outside of the auxiliary pipe 5, the same below) It is preferable that the end is connected to the upper side of the pressure tank 3 so that it can flow into the upper part of the tank 3. As shown, in a general water piping system, a height difference (Δh) of, for example, about 5 m between the pressure tank connection part of the main pipe 2 and the central standard water level (NWL) of the pressure tank 3 Since there exists, the pressure of the compressed air in the pressure tank 3 is as low as the head pressure of about 5 m (0.5 Bar). Therefore, the fluid discharged from the pump 1 flows smoothly and at a relatively high speed into the auxiliary pipe 5 connecting the main pipe 2 having this pressure difference and the pressure tank 3.

When the auxiliary pipe 5 is connected to the main pipe 2 at the rear end of the pump 1, as shown in (a) of FIG. 2, the check valve 4 formed in the main pipe 2 at the rear end of the pump 1 ) is preferably connected to the front end side of As for the pressure of the fluid flowing through the main pipe 2, the pressure at the front end of the check valve 4 is greater than the pressure at the rear end of the check valve 4 due to frictional loss in the check valve 4. Accordingly, the flow rate of the fluid flowing along the auxiliary pipe 5 is relatively faster when the auxiliary pipe 5 is connected to the front end of the check valve 4 than when it is connected to the rear end of the check valve 4, which will be described later. By maximizing the ejector effect as described above, smooth inflow of gas into the auxiliary pipe 5 is possible.

When the fluid is transferred to the pressure tank 3 through the auxiliary pipe 5 at a relatively high speed, the gas suction unit 10 sucks in ambient external gas (air) using an ejector effect to the auxiliary pipe ( It is a means for supplying to the pressure tank (3) through 5). Ejector refers to a kind of jet pump that ejects pressured water, steam, air, etc. from a jet outlet at high speed to move the surrounding fluid to another place. , It is also used to discharge or condense steam or water (refer to the Naver Knowledge Encyclopedia and Environmental Engineering Glossary). That is, the ejector effect is an effect in which, when a fluid is ejected at a high speed, a low-pressure area is formed around it to attract (suck) other fluid around it and transport it to another place. The present invention connects the main pipe (2) on the discharge side of the pump (1) and the pressure tank (3) with an auxiliary pipe (5) so that gas can be supplied to the pressure tank (3) without a gas supply device such as an air compressor. The fluid discharged from (1) is transported at high speed, and a gas suction part (10) is formed in the auxiliary pipe (5) so that the gas flows into the auxiliary pipe (5) by the ejector effect and then to the pressure tank (3). that was to be transported. On the other hand, as shown in FIG. 2, a gas inlet shut-off valve 5a is installed in the section between the gas suction part 10 of the auxiliary pipe 5 and the pressure tank 3, so that the pressure tank 3 It is preferable to be configured to block gas supply to the inside.

On the other hand, in all embodiments described below, water transferred to the pressure tank 3 through the auxiliary pipe 5 is moved by the pressure of the pump 1 connected to the main pipe 2, and the main pipe 2 Since the power of the pump 1 that is already used is used to transfer the fluid through the pump 1, additional power is not required, so power savings can be achieved as much as the air compressor is not used. As mentioned above, the transfer of the fluid through the auxiliary pipe 5 is performed by the pump 1 without separate power because there is a pressure difference between the pressure tank 3 and the front side of the check valve 4 of the main pipe 2. ), depending on the state of the piping system, the pressure difference between the pressure tank (3) and the front end of the check valve (4) of the main pipe (2) is insignificant or the pressure is balanced. There may be cases where the transfer is not carried out smoothly. In preparation for this case, it is preferable that a sub-pump (SP; Sub-Pump) is additionally provided in the auxiliary pipe 5 as shown in (a) of FIG. 2 . Since the auxiliary pipe 5 is installed for the purpose of sucking and transporting gas by the ejector effect, the higher the flow rate of the fluid, the better the gas suction. Therefore, it is preferable that the diameter of the auxiliary pipe 5 is formed relatively smaller than the diameter of the main pipe 2, and accordingly, the sub-pump SP has a higher capacity than the pump 1 connected to the main pipe 2. Since a relatively small pump can be used, the power consumption due to the operation of the sub pump (SP) will be less than the power required for the operation of the air compressor. Therefore, even when the sub-pump SP is operated, a power saving effect can be achieved. It can be understood that the sub-pump SP may be employed in all embodiments to be described below, even if there is no special mention.

In addition, as shown in (a) of FIG. 2, it is preferable that a flow regulating valve (FRV) is additionally installed in the main pipe 5. The flow control valve (FRV) controls the flow rate (flow rate) of the fluid discharged from the pump 1 and transferred to the main pipe 2, and adjusts the flow rate (flow rate) by adjusting the opening degree, such as a motorized valve or a proportional control valve. possible. That is, since the flow rate (flow rate) of the fluid transported not only through the main pipe 2 but also through the auxiliary pipe 5 is changed when the opening of the flow control valve FRV is adjusted, the gas suction amount in the gas suction unit 10 is changed. can be adjusted. For example, if a large amount of gas is required to be filled into the pressure tank (3), the flow rate transferred to the main pipe (2) is reduced by lowering the opening rate of the flow control valve (FRV), and the flow rate (flow rate) transferred to the auxiliary pipe (5) is reduced. By increasing E, the ejector effect is maximized so that a large amount of gas can be sucked in from the gas suction part 10 and the sucked gas can be filled into the pressure tank 3 through the auxiliary pipe 5. Hereinafter, it may be understood that the flow control valve FRV may be employed in all embodiments to be described later, even if there is no special mention.

3 shows a first preferred embodiment according to the present invention. Here, the gas suction part 10 may include a gas inlet pipe 12 and a valve 14 for controlling the gas inlet pipe 12 . The gas inlet pipe 12 is branched and connected to one side from the auxiliary pipe 5, and is preferably connected to the entrance of the auxiliary pipe 5, which is a region where the flow rate rapidly increases to maximize the ejector effect. The end of the gas inlet pipe 12 is kept open so that gas can flow in, and a valve 14 is installed to control the incoming gas to prevent gas from flowing in, blocked or reversed. The valve 14 may be configured as a check valve so that the inflow gas or the fluid flowing through the auxiliary pipe 5 is not discharged to the outside through the gas inlet pipe 12, and is opened when the pressure inside is lower than the outside. It may be configured as an electronic valve so that gas can be introduced, or may be configured as other air valves or vacuum cut-off valves, and one or more selected from these valves may be installed.

Through this configuration, when the pump 1 is operated, a part of the fluid discharged under pressure from the pump 1 flows through the main pipe 2, and a part flows through the auxiliary pipe 5, and the auxiliary pipe 5 ) Due to the sudden increase in flow rate, low pressure is generated at the connection part of the gas inlet pipe 12, and the gas is introduced through the gas inlet pipe 12. The gas introduced in this way is transferred to the pressure tank 3 along with the fluid along the auxiliary pipe 5. The fluid supplied into the pressure tank (3) moves to the lower side of the pressure tank (3) by the load, and the gas moves to the upper side of the pressure tank (3), and the gas and fluid are separated up and down inside the pressure tank (3). Saved. In this way, by using the ejector effect, gas can be supplied into the pressure tank 3 without installing a gas supply device for supplying gas by power such as an air compressor or a nitrogen generator.

4 shows a second preferred embodiment according to the present invention. In the above, the gas inlet pipe 12 and the valve 14 have been exemplified as the gas suction part 10, but as shown in (a) of FIG. 4, without a separate gas inlet pipe 12 A gas inlet 11 is formed on one side of the auxiliary pipe 5 so that external gas flows into the auxiliary pipe 5 through the gas inlet pipe 12 when the fluid is transferred through the auxiliary pipe 5 You may. In this case, as shown in (b) of FIG. 4, it is preferable that the valve 14 is installed directly on the gas inlet 11. The valve 14 may be configured as a check valve so that the inflow gas or the fluid flowing through the auxiliary pipe 5 is not discharged to the outside through the gas inlet pipe 12, and is opened when the pressure inside is lower than the outside. It may be configured as an electronic valve so that gas can be introduced, or may be configured as other air valves or vacuum cut-off valves, and one or more selected from these valves may be installed.

5 shows a third preferred embodiment of the present invention. In this embodiment, in order to maximize the ejector effect, a conventional ejector 16 is installed in the auxiliary pipe 5. 5 shows a structure in which the ejector 16 is installed in the auxiliary pipe 5 as an example. The internal structure of a typical ejector 16 is shown inside a circle in FIG. 5 . As shown, the ejector 16 is provided with a nozzle 16a ejected after fluid is introduced on one side, and a diffuser 16b disposed in a straight line spaced apart from the nozzle 16a at a predetermined interval on the other side. are provided In addition, a suction chamber 16c is formed between the nozzle 16a and the diffuser 16b, and a gas inlet 11 is formed on one side of the suction chamber 16c to suck gas. Here, the ejector 16 is connected to the auxiliary pipe 5, the inlet of the nozzle 16a is connected to the main pipe 2 through the auxiliary pipe 5, and the outlet of the diffuser 16b is connected to the auxiliary pipe 5 It is connected to the pressure tank (3) by. In addition, the gas inlet pipe 12 may be connected to the gas inlet 11 of the ejector 16, and the valve 14 may be installed in the gas inlet pipe 12, and the gas inlet 11 may have a valve ( 14) may be installed directly. Here, the valve 14 may be installed at least one selected from a check valve, an electric valve, an electronic valve, an air valve, and a vacuum cut-off valve.

Accordingly, the fluid discharged from the pump 1 is branched into the auxiliary pipe 5 and is ejected from the nozzle of the ejector 16 at high speed while moving along the diffuser 16b, and thus inside the suction chamber 16c. A low pressure is generated and external gas is introduced through the gas inlet 11 . The introduced gas is discharged through the diffuser 16b together with the fluid injected from the nozzle 16a and supplied to the pressure tank 3 through the auxiliary pipe 5.

6 shows a fourth preferred embodiment of the present invention. In this embodiment, a venturi 17 is installed instead of the ejector 16 of FIG. 5 . 6 shows a structure in which the venturi 17 is installed in the auxiliary pipe 5 as an example. As shown inside the circle in FIG. 6 , the venturi has relatively large inlet and outlet diameters and a relatively small central diameter, so that the flow rate increases rapidly when the fluid passes through the central part with a small diameter. Accordingly, in the present invention, the gas inlet 11 is formed at one side of the central portion of the venturi 17 so that when the fluid passes through the central portion of the venturi 17, a low pressure portion is generated according to the increase in flow rate, so that the gas flows smoothly. . Similarly, the gas inlet pipe 12 and the valve 14 may be installed in the gas inlet 11 of the venturi 17, or the valve 14 may be installed directly in the gas inlet 11. And, similarly, the valve 14 may be installed at least one selected from a check valve, an electric valve, an electronic valve, an air valve, and a vacuum cut-off valve.

Meanwhile, according to the structure as described above, since fluid and gas are continuously supplied to the pressure tank 3 through the auxiliary pipe 5 while the pump 1 is operating, the amount of gas inside the pressure tank 3 continuously increases. , The fluid previously stored in the pressure tank 3 equal to the amount of fluid and gas introduced into the pressure tank 3 is discharged back to the main pipe 2 through the pressure tank connection pipe 4. Therefore, in general, the amount of gas in the pressure tank 3 continuously increases and the water level decreases. On the other hand, when the pressure of the main pipe 2 increases, the fluid flows from the main pipe 2 through the pressure tank connection pipe 4 into the pressure tank 3 and the water level rises. As such, the water level of the pressure tank 3 is changed according to the amount of gas in the pressure tank 3 and the pressure change of the main pipe 2, and the water level of the pressure tank 3 is the standard water level (NWL). ) should always be maintained. Therefore, a control means for maintaining a constant water level in the pressure tank 3 is required. To this end, the pressure tank 3 according to the present invention preferably additionally includes a water level sensor 6, an exhaust valve VV and a drain valve DV.

For example, as shown in FIG. 5, the water level sensor 6 may be an electronic level transmitter (LT) capable of detecting the entire water level inside the pressure tank 3 in real time, or a standard water level line (NWL) , It may be a contact type level switch (LSN, LSH, LSL) installed on the upper limit water level line (HWL) and the lower limit water level line (LWL), respectively. Here, the upper limit water level line HWL means the upper limit of the appropriate standard water level range of the pressure tank 3, and the lower limit water level line HWL means the lower limit of the appropriate standard water level range of the pressure tank 3. That is, the water level inside the pressure tank 3 must always be maintained within the standard water level range defined between the upper limit water level line (HWL) and the lower limit water level line (LWL).

On the other hand, an exhaust valve (VV) is provided at the top of the pressure tank (3), and a drain valve (DV) is provided at the bottom of the pressure tank (3) or at the drain pipe (7) branched from the pressure tank connection pipe (4). may be provided.

The exhaust valve (VV) is for discharging the gas inside the pressure tank (3) to the outside, and the level transmitter (LT) or level switch (LSN, LSH, LSL) indicates that the water level inside the pressure tank (3) is less than the standard water level range. That is, when it is detected that the water level has dropped below the lower limit water level line (LWL), the exhaust valve (VV) is opened and the gas inside the pressure tank (3) is discharged to the outside, thereby raising the water level.

Meanwhile, as shown in FIG. 5 , an air valve AV may be provided at a standard water level point of the pressure tank 3 instead of the exhaust valve VV. The air valve (AV) is provided with a ball float inside the valve housing, and when water flows into the valve housing, the ball float rises to close the outlet, and when there is no water, the ball float descends It is a well-known valve configured such that the outlet is opened so that gas is discharged. If this air valve is installed at the standard water level point of the pressure tank, when the water level inside the pressure tank (3) falls below the standard water level, the gas inside the pressure tank (3) is discharged to the outside and the water level inside the pressure tank (3) can be prevented from further descending.

The drain valve (DV) is for discharging the fluid inside the pressure tank (3) to the outside when the pump is stopped. To do this, the fluid inside the pressure tank (3) is discharged through the drain valve (DV) and then filled with gas.

7 shows a fifth preferred embodiment of the present invention. In this embodiment, the initial filling of the gas in the pressure tank 3, the effective gas filling in the system where the pump 1 is frequently turned on and off, and the gas suction part 10 such as the ejector 16 or the venturi 17 and the pipe For efficient cleaning, an auxiliary tank 18 and a flushing valve are additionally provided.

As shown in FIG. 7, the auxiliary tank 18 is installed on the discharge side of the gas suction part 10 (the ejector 16 is shown as an example in the drawing) of the auxiliary pipe 5, and a large amount of gas is It is configured in the form of a pipe with a relatively larger diameter than the tank or auxiliary pipe 5 formed relatively long in the longitudinal direction so as to be stored. And, on the lower side of the auxiliary pipe 5, a flushing pipe 8 for cleaning by discharging the fluid inside the gas suction part 10 such as the auxiliary tank 18 and the ejector 16 to the outside is branched and connected, A first flushing valve (S1) is provided in the flushing pipe (8). Here, it is obvious that the first flushing valve S1 may be directly connected to the auxiliary pipe 5. In addition, a second flushing valve (S2) is provided on the upper part of the auxiliary tank 18, and a check valve (CV) or a gas inflow blocking valve (5a) is provided between the auxiliary tank 18 and the pressure tank 3; 2 and 3) may be installed.

According to the above configuration, when the first flushing valve (S1) is opened when the pump (1) is stopped, the check valve (CV) installed between the auxiliary tank (18) and the pressure tank (3) or the gas inflow shutoff valve (5a) or less The fluid in all the pipes (auxiliary pipe 5, auxiliary tank 18, ejector 16, flushing pipe 8) is discharged to the outside. At this time, the auxiliary tank 18, the ejector 16, and the auxiliary pipe 5 may be cleaned by opening the second flushing valve S2 and injecting a cleaning fluid such as high-pressure clean water or compressed air. .

In addition, since a large amount of gas is filled in the auxiliary tank 18 when the pump 1 is initially operated or restarted after stopping, a large amount of gas inside the auxiliary tank 18 is transferred to the pressure tank 3 by the operation of the pump 1. ), it is possible to quickly fill the pressure tank 3 with the pump 1.

8 shows a water piping system according to another preferred embodiment of the present invention. As shown, in this embodiment, a plurality of pressure tanks (3, 3 ') are branched and installed in parallel to the main pipe (2), and an auxiliary pipe (5) is connected to at least one pressure tank (3), Adjacent pressure tanks 3 and 3' are configured such that upper portions are communicated with each other through a connecting pipe 20. And, the connection pipe 20 is provided with an on-off valve (VOC).

This configuration is for filling a plurality of pressure tanks with one ejector 16 in a water piping system equipped with a plurality of pressure tanks. During operation of the pump 1, as described above, the fluid is transferred at a relatively high speed through the auxiliary pipe 5, and accordingly, the gas is sucked and introduced into the gas suction unit 10. The introduced gas is supplied to the pressure tank (3) connected to the auxiliary pipe (5). At this time, when the VOC of the connection pipe 20 connected to the pressure tank 3 connected to the auxiliary pipe 5 and the adjacent pressure tank 3' is opened, the pressure tank 3 connected to the auxiliary pipe 5 ) is supplied to another adjacent pressure tank (3'). In this way, it is possible to fill the plurality of pressure tanks 3 and 3' with gas with one ejector 16. In FIG. 8, only two pressure tanks 3 and 3' connected in parallel are taken as an example, but the number of pressure tanks connected in parallel is not limited. In this case, the gas filling of each pressure tank can be controlled by connecting adjacent pressure tanks with a connection pipe, and opening and closing valves installed in each connection pipe as necessary.

On the other hand, the case where a gas supply device such as a separate air compressor or nitrogen generator is not used has been described so far, and in this case, all of the auxiliary pipes 5 are directly connected to the pressure tank 3. However, the combination of a nitrogen supply device 9 such as an air compressor or nitrogen generator connected to the pressure tank to fill the pressure tank 3 with compressed air or nitrogen and the gas suction unit 10 according to the present invention For this purpose, as shown in FIG. 9 , the auxiliary pipe 5 may be connected to a filling pipe 9a connecting the gas supply device 9 and the pressure tank 3. That is, if necessary, the gas supply device 9 may be operated to directly fill the pressure tank 3 with gas such as compressed air or nitrogen, or the gas supply device 9 may be stopped and the gas according to the present invention Gas may be filled through the suction part 10 . In this case, for the selective use of the gas supply device 9 and the gas suction part 10 according to the present invention, as shown in FIG. 9, the connection between the auxiliary pipe 5 and the filling pipe 9a A three-way valve 9b may be installed, or separate valves may be installed in the auxiliary pipe 5 and the filling pipe 9a.

So far, it has been described in detail based on the embodiments of the present invention, but the scope of the present invention is not limited thereto, and will include the embodiments of the present invention and substantially equivalent ranges.

1: pump 2: main pipe
3: pressure tank 5: auxiliary pipe
10: gas suction part 12: gas inlet pipe
14: valve 16: ejector
17: venturi 18: auxiliary tank

Claims (68)

with a pump;
a main pipe for transporting the fluid pressurized by the pump;
A pressure tank branched to the main pipe to prevent water shock or damage in the pipe system by adjusting the water level in the tank;
an auxiliary pipe branched between the discharge side of the pump and a check valve installed in the main pipe and connected to the pressure tank; and
A water piping system including a gas suction unit for sucking gas by the flow of the fluid transported through the auxiliary pipe during operation of the pump and introducing it into the auxiliary pipe. According to claim 1,
The water piping system, characterized in that the gas suction portion comprises a gas inlet pipe branched from the auxiliary pipe and into which gas flows. According to claim 2,
The water piping system, characterized in that the gas suction unit further comprises a valve for regulating the gas flowing through the gas inlet pipe. According to claim 3,
The valve is a water piping system, characterized in that at least one selected from a check valve, a vacuum cut-off valve, an air valve, an electric valve, and an electronic valve. According to claim 2,
Water piping system, characterized in that the sub-pump is installed in the auxiliary pipe. According to claim 2,
Water piping system, characterized in that the flow control valve is installed in the main pipe. According to claim 1,
The water piping system, characterized in that the gas suction portion comprises a gas inlet formed on one side of the auxiliary pipe through which gas flows. According to claim 7,
The water piping system, characterized in that the gas suction unit further comprises a valve for regulating the gas flowing through the gas inlet. According to claim 8,
The valve is a water piping system, characterized in that at least one selected from a check valve, a vacuum cut-off valve, an air valve, an electric valve, and an electronic valve. According to claim 7,
Water piping system, characterized in that the sub-pump is installed in the auxiliary pipe. According to claim 7,
Water piping system, characterized in that the flow control valve is installed in the main pipe. According to claim 1,
The water piping system, characterized in that the gas suction unit comprises an ejector with a gas inlet formed on the side. According to claim 12,
The water piping system further comprising a valve for regulating the gas flowing through the side gas inlet of the ejector. According to claim 13,
The valve is a water piping system, characterized in that at least one selected from a check valve, a vacuum cut-off valve, an air valve, an electric valve, and an electronic valve. According to claim 12,
Water piping system, characterized in that the sub-pump is installed in the auxiliary pipe. According to claim 12,
Water piping system, characterized in that the flow control valve is installed in the main pipe. According to claim 1,
The water piping system, characterized in that the gas suction unit comprises a venturi formed with a gas inlet on the side. 18. The method of claim 17,
The water piping system further comprising a valve for regulating gas flowing through the side gas inlet of the venturi. According to claim 18,
The valve is a water piping system, characterized in that at least one selected from a check valve, a vacuum cut-off valve, an air valve, an electric valve, and an electronic valve. 18. The method of claim 17,
Water piping system, characterized in that the sub-pump is installed in the auxiliary pipe. 18. The method of claim 17,
Water piping system, characterized in that the flow control valve is installed in the main pipe. According to claim 1,
Water piping system, characterized in that the auxiliary tank is provided at the rear end of the gas suction portion of the auxiliary pipe. 23. The method of claim 22,
The auxiliary tank is a water piping system, characterized in that consisting of a tank extending in the longitudinal direction. 23. The method of claim 22,
The auxiliary tank is a water piping system, characterized in that composed of a pipe having a larger diameter than the auxiliary pipe. 23. The method of claim 22,
Water piping system, characterized in that the auxiliary pipe is provided with a first flushing valve for discharging the fluid inside the auxiliary tank and the gas intake to the outside. 23. The method of claim 22,
The water piping system, characterized in that the auxiliary tank is provided with a second flushing valve for injection of fluid for cleaning the inside of the auxiliary tank and the gas suction unit. 23. The method of claim 22,
Water piping system, characterized in that the sub-pump is installed in the auxiliary pipe. 23. The method of claim 22,
Water piping system, characterized in that the flow control valve is installed in the main pipe. According to claim 1,
The water piping system further comprising an exhaust valve for exhausting gas inside the pressure tank to the outside when the water level inside the pressure tank is less than the standard water level range. According to claim 1,
The water piping system further comprising an air valve installed at a standard water level point of the pressure tank to exhaust gas inside the pressure tank to the outside when the water level inside the pressure tank is less than the standard water level range. According to claim 1,
The water piping system further comprising a drain valve for discharging the fluid inside the pressure tank to the outside. According to claim 1,
The water piping system, characterized in that the plurality of pressure tanks are branched and installed in parallel to the main pipe, and the upper portions of adjacent pressure tanks are communicated with each other by a connecting pipe. According to claim 1,
Water piping system, characterized in that the sub-pump is installed in the auxiliary pipe. According to claim 1,
Water piping system, characterized in that the flow control valve is installed in the main pipe. According to claim 1,
The water piping system further comprising a gas supply device connected to the pressure tank by a filling pipe to supply gas to the pressure tank. delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete

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