KR101711392B1 - Booster pump for water supply using air venting - Google Patents

Booster pump for water supply using air venting Download PDF

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Publication number
KR101711392B1
KR101711392B1 KR1020150125453A KR20150125453A KR101711392B1 KR 101711392 B1 KR101711392 B1 KR 101711392B1 KR 1020150125453 A KR1020150125453 A KR 1020150125453A KR 20150125453 A KR20150125453 A KR 20150125453A KR 101711392 B1 KR101711392 B1 KR 101711392B1
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KR
South Korea
Prior art keywords
water
electrode
pipe
water supply
air venting
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KR1020150125453A
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Korean (ko)
Inventor
구인회
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하지기계 주식회사
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Priority to KR1020150125453A priority Critical patent/KR101711392B1/en
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Publication of KR101711392B1 publication Critical patent/KR101711392B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B5/00—Use of pumping plants or installations; Layouts thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/007—Details, component parts, or accessories especially adapted for liquid pumps
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/02—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/18—Switches operated by change of liquid level or of liquid density, e.g. float switch

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Public Health (AREA)
  • Hydrology & Water Resources (AREA)
  • Looms (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

The present invention relates to a water supply pressure pump device which more accurately detects flow of water to improve stability and efficiency of a motor. The water supply pressure pump device using water supply air venting according to an embodiment of the present invention comprises: a pressure pump which adjusts pressure of water flowing in a water supply pipeline; a water level rod which is positioned at the upper portion of the water supply pipeline, and detects whether water flows in the water supply pipeline by using a first electrode and a second electrode; an air venting device which is positioned at the upper portion of the water level rod, and discharges gas flowing into the water supply pipeline to the outside; and a control unit which controls an operation of the pressure pump in correspondence with the detection of the water level rod, wherein the air venting device includes an air vent valve which discharges the gas by using change in pressure according to the inflow of the gas and a faucet which discharges the gas and discharges a part of the water by adjusting a lever.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a water pump,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply pump apparatus using air venting, and more particularly, to a water supply pump apparatus capable of sensing the flow of water more accurately and improving the stability and efficiency of the motor.

Generally, tap water refers to the total amount of facilities that supply drinking water to people in urban and rural areas. This tap water includes a drainage process in which purified water is sent to each household from a water purification plant.

This drainage process requires adequate water pressure, water, and water communication capability in order to provide the necessary quantity instantaneously when the user turns on the faucet or opens the fire hydrant. Such a drainage facility is a drainage line, a drainage pump, and a drainage pipe, and can be appropriately disposed and operated to exhibit its function.

Generally, in order to send water treated in a water purification plant to a customer through a water pipe to a remote place, a large water pressure is required in the pipe. In addition, when the water supply distance is long or the water is sent at the high water level, a separate pressure pumping facility should be installed and pressurized in the middle.

Hereinafter, a conventional pressurizing apparatus 10 including the underwater pressurizing pump will be described with reference to FIGS. 1A and 1B. 1A and 1B show an example of a conventional tap water pressurization apparatus equipped with an underwater pressurizing pump.

1A and 1B, a conventional pressurizing apparatus 10 equipped with an underwater pressurizing pump is installed at a position relatively higher than the drainage provided with the water supply, and is installed at a predetermined width in the horizontal direction, And an underwater motor unit 31 in which an underwater pressurizing pump 30 is mounted inside the case horizontally in the manhole housing unit 40. The underwater motor unit 31 And a plurality of valve means (20) connected to the upper and lower sides to regulate the flow of water flowing out to the underwater motor portion (31).

In order to pressurize and supply the tap water, the underwater motor unit 31 presses the tap water taken via the adjusted valve unit. And the water is discharged through the valve means 20 located at the rear end to the set water pipe.

Meanwhile, the structure of the water level rod for sensing the flow of water in the water pipe in the conventional tap water pressurizing apparatus will be described. 2 shows an example of a water level indicator used in a conventional water pressurization apparatus.

In the water pressurization equipment, the water pressurization pump 30 is operated only when there is a flow of water in the water supply duct 102. This is to prevent overheating due to abrasion of the motor of the underwater pressurizing pump 30 or metal friction and to shorten the service life.

Conventionally, a connection part 130 is formed on the water pipe 102 and a water pipe 110 is installed to sense the flow of water in the water pipe 102. Electrodes 112 and 114 are connected to the weft bar 110, and a predetermined waterproof layer 116 is formed.

When water flows into the water supply duct 102, the electrodes 112 and 114 are energized, whereby the flow of water can be sensed. When there is a flow of water, the underwater pressurizing pump 30 can be operated to pressurize the water to an appropriate pressure.

However, in the case of the conventional water leveling rod, since the water leveling rod is located on the upper part of the waterway conduit 102, gas such as air is often introduced into the waterway conduit 102. This inflowing gas may interfere with the detection of the water flow of the leveling rod.

That is, it can be detected that there is no flow of water despite the flow of water due to the gas of the water line 102. This may cause wear or damage to the motor of the underwater pressurizing pump 30, which results in a need for additional maintenance and repair and an increase in incidental costs.

Accordingly, there has been a demand for development of a water pressurizing pump apparatus capable of accurately detecting the flow of water by efficiently removing the gas introduced into the water supply duct 102.

(Document 1) KR 1992-0013374 (Document 2) Korean Utility Model Registration No. 20-0443139

SUMMARY OF THE INVENTION It is an object of the present invention to provide a water pressure pumping device for a user, which can more accurately detect the flow of water and improve the stability and efficiency of a motor.

More specifically, the present invention provides a water pressure pumping apparatus capable of effectively removing inflow gas by introducing an air venting device into a swivel rod and effectively detecting the flow of water.

In addition, the present invention provides a water pressure pumping device that allows air venting to be performed appropriately according to circumstances and needs by using an air vent valve and a water supply as an air venting device, and air venting is efficiently performed through piping The purpose is to do.

It is another object of the present invention to provide a water supply pressure pump device for a user, which prevents abrasion and damage of an underwater pressurization pump motor, thereby enabling stable and long-term use and securing economical efficiency.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.

In order to accomplish the above object, there is provided a water pressure pumping apparatus using water venting according to an example of the present invention, comprising: a pressure pump for adjusting a pressure of water flowing through a water pipe; A water level sensor located at an upper portion of the water line to detect whether water flows through the water line using the first electrode and the second electrode; An air venting device positioned above the water level rod and discharging the gas introduced into the water supply duct to the outside; And a control unit for controlling the operation of the pressurizing pump in response to the detection of the water level indicator, wherein the air venting apparatus includes an air vent valve for discharging the gas using a pressure change caused by the inflow of the gas; And a power receiver capable of discharging the gas by adjusting the lever and discharging a part of the water to the outside.

In addition, when it is sensed that water does not flow through the water pipe by the weft bar, the control unit may control the pressure pump not to operate.

And a connection pipe formed at an upper portion of the water pipe to connect the water pipe and the weft bar, wherein a first water, which is a part of the water flowing through the water pipe, is connected to the bottom of the weft bar Can be introduced.

The first electrode and the second electrode may have a shape elongated in the longitudinal direction, and the first electrode and the second electrode may include a portion of the lower portion of the first electrode and a portion of the lower portion of the second electrode, And the first water introduced into the lower portion of the water receiving bar may conduct electricity between the first electrode and the second electrode.

When the first electrode and the second electrode are energized, it is detected that water flows through the water pipe by the weft bar, and when the first electrode and the second electrode are not energized, It is detected that water does not flow through the water line.

The shutoff valve may further include a shut-off valve installed in the connection pipe and capable of shutting off the first water flowing into the lower portion of the water level through the connection pipe using a ball valve.

The lower end of the first electrode and the lower end of the second electrode may extend to the upper side of the ball valve.

And a pipe connected to the lower portion of the water level rod and connected to the upper portion of the water level rod, wherein at least one of the gas introduced into the waterway pipe and the first water flows through the pipe To the air venting device.

Further, the apparatus may further include a T-shaped pipe formed on the water level rod, the upper end connected to the air vent valve, and the water outlet connected to the side surface.

Further, the water leveling rod and the air venting device may be integrally installed.

The present invention can provide the user with a water supply pressure pumping device that can more accurately detect the flow of water and improve the stability and efficiency of the motor.

More specifically, the present invention can provide a user with a water supply pressurizing pump device capable of efficiently removing inflow gas by introducing an air venting device into a swivel rod and effectively detecting the flow of water.

In addition, the present invention provides a water pressure pumping device that allows air venting to be performed appropriately according to circumstances and needs by using an air vent valve and a water supply as an air venting device, and air venting is efficiently performed through piping can do.

In addition, the present invention can provide a water pressure pump apparatus to a user, which prevents abrasion or damage of an underwater pressurization pump motor, thereby enabling stable and long-term use and securing economical efficiency.

It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art to which the present invention belongs It will be possible.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate a preferred embodiment of the invention and, together with the description, serve to provide a further understanding of the technical idea of the invention, It should not be construed as limited.
1A and 1B show an example of a conventional tap water pressurization apparatus equipped with an underwater pressurizing pump.
2 shows an example of a water level indicator used in a conventional water pressurization apparatus.
3A and 3B illustrate an example of a water supply pressure pumping apparatus using water venting according to the present invention.
Figure 4 is an illustration of a water pressurization pumping device using water venting implemented in accordance with the present invention.
5 is a cross-sectional view of a part of a weft bar which can be applied to the present invention.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below does not unduly limit the contents of the present invention described in the claims, and the entire configuration described in this embodiment is not necessarily essential as the solution means of the present invention.

The same reference numerals are used for portions having similar functions and functions throughout the drawings. Throughout the specification, when a part is referred to as being "connected" to another part, it is not limited to a case where it is directly connected to the other part, do. Also, to include an element does not exclude other elements unless specifically stated otherwise, but may also include other elements.

<Constitution of Water Supply Pump System Using Water Ventilation>

Hereinafter, the configuration of the water supply system pressure pump apparatus using the water supply air venting proposed by the present invention will be described in detail with reference to FIGS. 3A and 3B, FIGS. 4 and 5. FIG.

FIGS. 3A and 3B illustrate an example of a water supply pressure pumping apparatus using water venting according to the present invention, and FIG. 4 illustrates an example of a water supply pressure pumping apparatus using water venting implemented according to the present invention.

Referring to FIG. 3A, the water pressurization pump apparatus 100 using the water supply air venting of the present invention is installed on the upper part of the water supply duct 102. The pressurizing pump can regulate the pressure of the water flowing in the water supply pipe 102 and the control unit controls the operation of the pressurizing pump to regulate the flow speed of the water in the water supply pipe 102.

When there is water in the water supply duct 102, the pressure pump is driven to control the flow of water. However, when the gas is introduced into the water supply duct 102, the water in the water supply duct 102 is not properly sensed, so that the operation of the pressure pump is stopped.

3B, the water pressurization pumping apparatus 100 using the water supply air venting according to the present invention is composed of a weft bar 110, a connection pipe 130, a T-type pipe 140, an air venting device 150, and the like .

However, the components shown in FIG. 3B are not essential, so that the water supply pressurizing pump apparatus 100 using the water supply air venting having components having more or fewer components than those shown in FIG. 3B may be implemented.

3, the water pressurization pumping apparatus 100 using the water supply air venting according to the present invention includes a connection pipe 130 formed on an upper portion of a water pipe 102 and a connection pipe 130 formed on an upper portion of the connection pipe 130, (110).

A T-shaped pipe 140 is connected to the upper portion of the weft bar 110 and a T-shaped pipe 140 is connected to the air venting device 150. Specifically, an air venting valve 154 is provided at an upper portion of the T-type piping 140, and a faucet 152 is installed at a side of the T-type piping 140.

Here, at least a part of the connecting pipe 130, the weft bar 110, the T-type pipe 140, and the air venting device 150 may be integrally formed. That is, the connection pipe 130, the weft bar 110, the T-type pipe 140, the air venting device 150, and the like may be integrally connected and integrally attached to the water supply duct 100.

The connection pipe 130 is formed on the upper part of the water supply pipe 102 and a part of the water flowing in the water supply pipe 102 can flow into the connection pipe 130. Between the connection pipe 130 and the weft bar 110, a pipe is formed and the water flowing into the connection pipe 130 flows into the weft bar 110 through the pipe.

The connection pipe 130 may be provided with a shutoff valve 132. A circular ball valve is installed inside the shutoff valve 132. The shutoff valve 132 can open and close the connection pipe 130 by using a ball valve so that the inflow of water can be controlled.

For example, when an abnormality occurs in the water supply pump apparatus 100 using the water supply air venting of the present invention, the connection pipe 130 may be shut off by using the shutoff valve 132, do. If only the shutoff valve 132 is operated in this way, water flowing through the connection pipe 130 can be shut off, so that simple repair and replacement are possible.

Referring to FIG. 5, a detailed structure of the weft bar 110 will be described. 5 is a cross-sectional view of a part of a weft bar which can be applied to the present invention.

The first electrode 112 and the second electrode 114 are formed on the horizontal bar 110 in a lengthwise direction and the lower ends of the first electrode 112 and the second electrode 114 are connected to the cut- And extends to the upper portion of the position where the ball valve of the valve 132 is located. The first electrode 112 and the second electrode 114 are connected to a controller (not shown) to detect whether water is flowing through the water line 102.

The inside of the weft bar 110 is made of a resin material such as a hatched portion in FIG. 5 obtained by solidifying the liquid state. This serves to prevent the first electrode 112 and the second electrode 114 from being directly energized by contacting the inside of the weft bar 110 and serves as a waterproof layer for blocking moisture.

When the water exists under the weft bar 110, the first electrode 112 and the second electrode 114 are energized, so that it can be detected that the water flows. Conversely, if there is no water in the lower part of the weft bar 110, the first electrode 112 and the second electrode 114 are brought into a disconnected state, and it can be detected that there is no water flow.

The water pipe 110 is installed in a hollow pipe 120, and the pipe 120 induces air venting. The gas inside the water supply duct 102 may be introduced into the air venting apparatus 150 through the pipe 120. In addition, the water in the water supply duct 102 after the air venting can be moved to the water supply 152 through the pipe 120.

A T-shaped pipe 140 is connected to the upper portion of the weft bar 110. The T-shaped pipe 140 may have a T-shape as shown in FIG. 3B. The lower end of the T-type pipe 140 is connected to the upper portion of the pipe 120 of the weft bar 110. The upper end of the T-type pipe 140 is connected to the air vent valve 154, The side is connected to the faucet 152.

The air vent valve 154 can automatically discharge the gas introduced into the water supply duct 102. For example, the air vent valve 154 may operate in response to a change in pressure due to the inflow of the gas to discharge the gas.

The water supply 152 can manually discharge the gas introduced into the water supply duct 102. The gas can be discharged to the outside by operating the lever 156 of the water receiver 152. Even if water is desired to be used in the field, the lever 156 can be operated to discharge part of the water.

<Operation of tap water pump system using tap water air venting>

Hereinafter, the operation of the water supply pressurizing pump apparatus using the water supply air venting proposed by the present invention will be described in detail.

When water flows into the water supply duct 102, a part of the water flowing through the water supply duct 102 flows into the lower portion of the weft bar 110 through the connection pipe 110.

As a result, the first electrode 112 and the second electrode 114 in the lower portion of the weft bar 110 are energized, and the flow of water into the water supply duct 102 is detected. The control unit may operate the pressurizing pump 30 to regulate the pressure of the water when the flow of water is sensed.

Since the gas introduced into the water supply duct 102 may interfere with the sensing function of the weft bar 110 located above the water supply duct 102, the gas is discharged to the outside by using the air venting apparatus 150 It is desirable to give.

The air vent valve 154 installed at the upper end of the T-type pipe 140 can automatically discharge the gas and the water receiver 152 connected to the side of the T-type pipe 140 can discharge the gas manually. The faucet 152 may also be used when using water on site.

By the operation of the air venting device 150, the detection by the weft bar 110 can be performed more accurately. Particularly, when the water supply is interrupted and the water supply is performed again after the construction is performed, a large amount of air is introduced into the water supply. The present invention is very advantageous for eliminating such a phenomenon.

If water does not flow into the water pipe 102, the first electrode 112 and the second electrode 114 are disconnected, and the control unit stops the operation of the pressurizing pump 30. Thereby protecting the motor of the pressurizing pump 30 and ensuring more stable use.

The above-described apparatus and method are not limited to the configurations and methods of the embodiments described above, but the embodiments may be modified so that all or some of the embodiments are selectively combined .

100: Tap water pump system using tap water air venting
102: Water supply pipe
110: Suweon
112, 114: electrode
120: Piping
130: connector
132: Isolation valve
140: T type piping
150: Air venting device
152: Faucet
154: Air vent valve
156: Lever

Claims (10)

A pressurizing pump for regulating the pressure of water flowing through the water line;
A water level sensor located at an upper portion of the water line to detect whether water flows through the water line using the first electrode and the second electrode;
An air venting device positioned above the water level rod and discharging the gas introduced into the water supply duct to the outside; And
And a control unit for controlling the operation of the pressure pump in response to the detection of the water level indicator,
In the air venting device,
An air vent valve for discharging the gas using a pressure change due to the flow of the gas; And
Further comprising: a power receiver capable of regulating a lever to discharge the gas and to discharge a part of the water to the outside,
And a connection pipe formed on the water pipe to connect the water pipe and the weft bar,
The first water, which is a part of the water flowing through the water pipe, flows into the lower part of the water pipe through the connection pipe,
And an upper end connected to the upper portion of the water level rod and a lower end connected to a lower portion of the water level rod,
Wherein at least one of the gas introduced into the water pipe and the first water is supplied to the air venting device through the pipe,
The inside of the weft bar is filled with resin,
Wherein the pipe passes through the resin and connects the upper portion of the weft bar and the lower portion of the weft bar,
Wherein one end of the first electrode and the other end of the second electrode are exposed under the resin,
Wherein the first electrode and the second electrode are disposed outside the piping.
The method according to claim 1,
When it is detected that water does not flow into the water line by the water bar,
Wherein the control unit controls the pressure pump so as not to operate. The method according to claim 1,
And a connection pipe formed on the water pipe to connect the water pipe and the weft bar,
Wherein the first water, which is a part of the water flowing through the water pipe, flows into the lower portion of the water pipe through the connection pipe. The method of claim 3,
Wherein the first electrode and the second electrode are elongated in the longitudinal direction,
Wherein the first electrode and the second electrode are installed in the weft bar so that a part of the lower part of the first electrode and a part of the lower part of the second electrode are positioned below the leveling rod,
Wherein the first water introduced into the lower portion of the water receiving compartment energizes the first electrode and the second electrode. 5. The method of claim 4,
When the first electrode and the second electrode are energized, it is detected that water flows through the tap water pipe by the weft bar,
Wherein when the first electrode and the second electrode are not energized, it is sensed that water does not flow through the water pipe by the weft bar. 5. The method of claim 4,
And a shutoff valve installed in the connection pipe and capable of shutting off the first water flowing into the lower portion of the water receiving hole through the connection pipe by using a ball valve. Pump device. The method according to claim 6,
Wherein the lower end of the first electrode and the lower end of the second electrode extend to the upper side of the ball valve. The method of claim 3,
And an upper end connected to the upper portion of the water level rod and a lower end connected to a lower portion of the water level rod,
Wherein at least one of the gas introduced into the water pipe and the first water is supplied to the air venting device through the pipe. The method according to claim 1,
And a T-shaped pipe formed at an upper portion of the water level rod, the upper end connected to the air vent valve, and the water receiving side connected to the water vent. The method according to claim 1,
Wherein the water leveling rod and the air venting device are integrally installed.
KR1020150125453A 2015-09-04 2015-09-04 Booster pump for water supply using air venting KR101711392B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR920013374A (en) 1990-12-13 1992-07-28 오오가 노리오 Recording and Playback Method of Color Video Signals
KR100740274B1 (en) * 2006-11-17 2007-07-18 주식회사 신한알앤디 A device for detecting the over-flood
KR200443139Y1 (en) 2008-07-04 2009-01-14 주식회사 신한알앤디 A pump for pressurizing the tap water pipeline mounted the static pressure control device
KR20090019344A (en) * 2007-08-20 2009-02-25 (주)엔탑스 Pumping apparatus installed in water supply pipeline

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR920013374A (en) 1990-12-13 1992-07-28 오오가 노리오 Recording and Playback Method of Color Video Signals
KR100740274B1 (en) * 2006-11-17 2007-07-18 주식회사 신한알앤디 A device for detecting the over-flood
KR20090019344A (en) * 2007-08-20 2009-02-25 (주)엔탑스 Pumping apparatus installed in water supply pipeline
KR200443139Y1 (en) 2008-07-04 2009-01-14 주식회사 신한알앤디 A pump for pressurizing the tap water pipeline mounted the static pressure control device

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