KR101437080B1 - a pressure reducint valve for preventing damage of diaphragm by over pressure - Google Patents

a pressure reducint valve for preventing damage of diaphragm by over pressure Download PDF

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Publication number
KR101437080B1
KR101437080B1 KR1020140023931A KR20140023931A KR101437080B1 KR 101437080 B1 KR101437080 B1 KR 101437080B1 KR 1020140023931 A KR1020140023931 A KR 1020140023931A KR 20140023931 A KR20140023931 A KR 20140023931A KR 101437080 B1 KR101437080 B1 KR 101437080B1
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KR
South Korea
Prior art keywords
diaphragm
pressure
flow path
stem
housing
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KR1020140023931A
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Korean (ko)
Inventor
신재보
김칠성
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신재보
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Priority to KR1020140023931A priority Critical patent/KR101437080B1/en
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Publication of KR101437080B1 publication Critical patent/KR101437080B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3268—Mounting of sealing rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
    • F16K7/12—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm
    • F16K7/14—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm arranged to be deformed against a flat seat
    • F16K7/17—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm arranged to be deformed against a flat seat the diaphragm being actuated by fluid pressure

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Fluid Pressure (AREA)

Abstract

The present invention discloses a pressure reducing valve. A pressure reducing valve for preventing breakage of the diaphragm due to overpressure according to an embodiment of the present invention includes a body having an inlet and an outlet formed therein and having a flow path connecting the inlet and the outlet, And a blocking portion that is raised and lowered according to a set pressure of the pressure regulating portion to shield the flow path of the body, wherein the pressure regulating portion is coupled to the body, And a top plate provided at a lower end of the adjusting screw located inside the housing and a bottom plate provided at the bottom of the housing, And the blocking portion is disposed in the housing space in the upper and lower portions A diaphragm positioned to divide the diaphragm, an up-down unit fixedly coupled to upper and lower sides of the diaphragm and having an upper side elastically supported by an adjustment spring of the pressure regulator, And a blocking unit installed at a lower end of the stem and capable of opening and closing the flow path in the body in accordance with the rising and falling of the stem. There is provided a pressure reducing valve for preventing breakage of the diaphragm caused by the diaphragm.

Description

[0001] The present invention relates to a pressure reducing valve for preventing damage of a diaphragm due to overpressure,

The present invention relates to a pressure reducing valve for preventing breakage of a diaphragm necessary for adjusting a pressure in a valve so as to extend the service life of the valve, .

With the development of building materials and construction technology, the rise of high-rise apartment buildings and commercial buildings continues to increase, and the supply of waterworks and hot water supply is becoming a problem. Specifically, in the case of a skyscraper apartment or a commercial building, the supply water pressure is gradually increasing so that the water supply of the water supply system and the hot water supply system can be smoothly performed even in a high-rise building.

However, as the supply water pressure becomes higher and higher, a higher hydraulic pressure acts on the lower part than on the upper part, so that an excessive amount of flow flows in the lower part and a flow is insufficient in the upper part. The problem of increasing damage and leakage of pipes and peripheral devices is increasing.

In addition, the high flow rate due to the high water pressure in the low-level portion causes noise and vibration of the piping, thereby causing a problem of deteriorating a pleasant residential environment.

In addition, in the complex water supply piping network of mountainous Korea, the high water pressure causes water shortage problem because it causes water leakage rate of waterworks to be decreased and waterworks water yield is lowered.

Therefore, in order to solve various problems in the water supply of the skyscraper buildings and the fire water piping system as described above, a pressure reducing valve having a function of appropriately lowering the water pressure to the branch piping which is divided from the main pipe of the lower level is installed and used , A pressure reducing valve is used to reduce the amount of water leakage in the water supply pipe network and increase the water flow rate of the waterworks.

The conventional pressure reducing valve includes a main valve 10 installed directly on a piping line 1, a pressure sensor 10 mounted on the main valve 10, A diaphragm pilot valve 20 for adjusting the pressure of the secondary side P2 by the pressure of the spring 22 which is adjusted by adjusting the pressure adjusting bolt 21 according to the range, And a control valve 31 for controlling the opening and closing speed of the pilot valve 20 by connecting the pilot valve 20 to the pilot valve 20 in various manners. A sensing pipe 40 connected from the secondary side P2 is provided for guiding the pressure generated in the secondary side P2 to the pilot valve 20 and controlling the pressure.

Therefore, when the pressure of the secondary side of the main valve 10 rises, the conventional pressure reducing valve causes the fluid to flow to the pilot valve 20 through the sensing pipe 40, The opening and closing member 11 of the main valve 10 cuts off the flow path, thereby reducing the pressure of the secondary side.

However, in the conventional pressure reducing valve, when the foreign substance is adsorbed on the opening / closing member 11 that shields the flow path of the main valve 10, as shown in an enlarged left side view of FIG. 1, So that the fluid continues to flow into the secondary side (P2) flow path. As a result, the pressure of the pilot valve (20) rises while the secondary side pressure rises and the diaphragm (23) is damaged.

That is, in the case of the pilot valve 20, the user sets a certain pressure. At this time, since the opening and closing member 11 of the main valve 10 can not block the flow path as described above, The pressure in the pilot valve 20 also rises and, as a result, exceeds the specific pressure, there is a problem that the diaphragm 23 made of a thin film made of rubber is easily broken, as shown in the right enlarged view of Fig. 1 have.

Accordingly, the applicant of the present invention has proposed a pressure reducing valve capable of preventing breakage of the diaphragm due to overpressure to solve the conventional problems as described above.

Korean Utility Model Registration No. 20-0327654 Korean Utility Model Registration No. 20-0327655

The embodiments of the present invention can prevent the diaphragm from being broken to regulate the pressure in the valve even if the secondary pressure to which the fluid is discharged is continuously increased, thereby making it possible to use the valve for a long period of time, A pressure reducing valve is provided to prevent breakage of the diaphragm due to overpressure.

A pressure reducing valve for preventing breakage of the diaphragm due to overpressure according to an embodiment of the present invention includes a body having an inlet and an outlet formed therein and having a flow path connecting the inlet and the outlet, And a blocking portion that is raised and lowered according to a set pressure of the pressure regulating portion to shield the flow path of the body, wherein the pressure regulating portion is coupled to the body, And a drain hole formed in a side surface of the housing, an adjusting screw threadably inserted through the upper portion of the housing, a top sheet provided at a lower end of the adjusting screw located inside the housing, And the shielding portion is provided with an accommodation space in the housing, A diaphragm positioned so as to straddle the diaphragm, an up-down unit fixedly coupled to upper and lower sides of the diaphragm and having an upper side elastically supported by an adjustment spring of the pressure regulator, And a blocking unit installed at a lower end of the stem and capable of opening and closing the flow path in the body in accordance with the rising and falling of the stem. There is provided a pressure reducing valve for preventing breakage of the diaphragm caused by the diaphragm.

The pressure reducing valve that can prevent breakage of the diaphragm according to an embodiment of the present invention allows a part of the excess pressure to be discharged to the outside when the secondary pressure of the valve exceeds the set pressure, So that it is not damaged.

In addition, it can be used for a long time without damaging the diaphragm, which can reduce the maintenance cost and prevent the secondary damage caused by the loss of the pressure reducing function due to the diaphragm breakage and extend the life of the pressure reducing valve.

1 is a view schematically showing a conventional pressure reducing valve.
FIG. 2 is a schematic view of a pressure reducing valve for preventing breakage of the diaphragm due to overpressure according to an embodiment of the present invention. Referring to FIG.
FIG. 3 is a schematic view of a pilot valve used in a pressure reducing valve to prevent breakage of the diaphragm due to overpressure according to an embodiment of the present invention. Referring to FIG.
FIG. 4 is a view schematically showing an enlarged view of the cut-off portion of FIG. 3. FIG.
FIGS. 5A to 5E are schematic views illustrating operation of a pressure reducing valve to prevent breakage of the diaphragm due to overpressure according to an embodiment of the present invention. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a pressure reducing valve according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings, which will prevent breakage of the diaphragm due to overpressure.

Referring to FIG. 2, the pressure reducing valve, which is capable of preventing breakage of the diaphragm due to overpressure according to an embodiment of the present invention, is installed directly on the piping line 1, and includes a primary side P1) flow path and a secondary side (P2) flow path formed with a discharge port through which the inflow fluid is discharged are formed, a diaphragm type main valve (10)

The pressure of the secondary side (P2) passage of the main valve (10) is adjusted by the pressure of the adjusting spring (125) which is mounted on the main valve (10) and is compressed by the operation of the adjusting screw A pilot valve (100)

And a control valve 31 connecting the pilot valve 100 to the main valve 10 by various methods and adjusting the opening and closing speed.

Here, the pressure reducing valve that can prevent damage to the diaphragm due to overpressure in accordance with an embodiment of the present invention has the same configuration as that of the conventional pressure reducing valve, and the configuration of the pilot valve 100 The pilot valve 100 will be described in detail with reference to FIG.

Referring to FIG. 3, the pilot valve 100 is configured such that a fluid supplied at a predetermined pressure from the flow path of the primary side (P1) of the main valve (10) So that the diaphragm used in the pilot valve 100 can be prevented from being damaged in the embodiment of the present invention.

The pilot valve 100 used in an embodiment of the present invention includes a body 110 having an inlet 111 and an outlet 112 and a valve 110 disposed at an upper portion of the body 110, A pressure regulator 120 and a blocking unit 130 that can be lifted or lowered according to the set pressure of the pressure regulator 120 to shield the flow path of the body 110. [

The body 110 has an inlet 111 connected to the primary flow path P1 of the main valve 10 at one side thereof and an outlet port 111 connected to the secondary flow path P2 of the main valve 10 at the other side thereof. And a flow path is formed therein to connect the inlet 111 and the outlet 112 with each other.

The pressure regulator 120 is coupled to the upper portion of the body 110 to regulate the pressure of the fluid flowing into the body 110. The pressure regulator 120 is coupled to the body 110, And an adjusting screw 123 screwed to penetrate the upper portion of the housing 122. The adjusting screw 123 is provided at one side of the housing 122, A topsheet 124 installed at the lower end of the topsheet 123 and an adjusting spring 125 located at the bottom of the bottomsheet 124.

4, the blocking portion 130 is provided to be elastically supported by the adjusting spring 125 of the pressure adjusting portion 120 so as to shield the flow path of the body 110 .

Specifically, the cut-off portion 130 includes a diaphragm 132, an up-down unit 150 fixedly coupled to the diaphragm 140 and having an upper side elastically supported by the adjustment spring 125, A stem 160 installed at the lower end of the stem 160 and inserted to the descending unit 150 so that the upper end of the stem 160 is elastically supported by the ascending and descending unit 150 through a stem fixing spring, And a blocking unit 170 for opening and closing the flow path in the body 110 in accordance with the rising and falling of the body 110.

The diaphragm 140 is installed such that a receiving space in the housing 122 is partitioned into a first chamber C1 and a second chamber C2. The diaphragm 140 is formed of a rubber member, And is fitted to a portion where the housing 122 is engaged.

The elevating and lowering unit 150 is positioned above and below the diaphragm 140 and is fixedly coupled to the diaphragm 140.

The upper plate 151 and the lower plate 151 are supported by the lower plate 151 and the diaphragm 140 so that the central portion of the lower plate 151 is passed through the lower plate 151 and the diaphragm 140, And a clamping bolt 152 which is fixed to the upper portion of the diaphragm 140 by a clamping nut 153. The clamping bolt 152 is fixed to the upper portion of the diaphragm 140, ).

The upper plate 154 is positioned such that an upper side thereof is resiliently supported by the adjustment spring 125 and a channel is formed at an inner center portion of the clamping bolt 153 in a non- An O-ring retainer 155 screwed to the inner circumferential surface of the clamping bolt 153 to support the clamping sheet O-ring 157 from the bottom, and a clamping sheet O- (156).

The upper end of the stem 160 is positioned so as to pass through the lifting unit 150. The upper end of the stem 160 is elastically fixed to the clamping bolt 152 by a stem tightening spring 162. [ And the lower end is positioned on the flow path formed in the body 110 through the upper portion of the body 110. [

At this time, the stem 160 is formed to have an outer circumferential diameter smaller than the inner diameter of the clamping bolt 152, and the stepped portion 163 is formed so as to contact or not contact with the clamping sheet O- .

A blocking unit 170 is provided at the lower end of the stem 160, which is positioned on the flow path formed in the body 110 through the upper portion of the body 110.

The shielding unit 170 includes a disk sheet 172 for sealing the flow path and a disk 174 for supporting the disk sheet 172 from below and screwed to the stem 160.

Therefore, a method of operating the pressure reducing valve to prevent breakage of the diaphragm due to overpressure according to an embodiment of the present invention will be described.

5A, when the fluid flows into the main valve 10 through the inlet of the main valve 10 in a state where the opening and closing member 11 of the main valve 10 blocks the flow path, The fluid flows to the pilot valve 100 via the control valve 31 through the pipe connected to the primary side P1 flow path and some of the fluid flows into the chamber C formed in the main valve 10, Lt; / RTI >

Since the pilot valve 100 is set to a predetermined pressure by the pressure regulator 120 so that the blocking unit 130 opens and closes the flow path, the flow of the air passing through the body 110 of the pilot valve 100 The fluid flows through the pipe to the secondary side (P2) of the main valve (10).

5 (b), when the opening and closing member 11 is opened by the pressure of the fluid, the fluid flows from the first side (P1) to the second side (P1) through the inlet And flows to the side of the vehicle side (P2) to be supplied to the customer.

In this state, when the pressure of the secondary side P2 increases to exceed the set pressure of the pressure regulator 120, the fluid flows through the sensing pipe 40 connected to the secondary side (P2) So that the diaphragm 140 rises to the first chamber C1 and the stem 160 fixedly coupled to the diaphragm 140 as shown in Figure 5C, As a result, the blocking portion 130 blocks the flow path formed in the body 110.

5D, when the shutoff part 130 of the pilot valve 100 blocks the flow path in the body 110, the fluid that has flowed to the pilot valve 100 flows into the main valve 10 The pressure in the chamber C rises and the flow path of the main valve 10 is shut off while the open / close valve 11 descends.

At this time, when a malfunction of the on-off valve 11 for shutting off the flow path of the main valve 10 occurs, the conventional pressure reducing valve continuously flows to the secondary side P2 of the main valve 10, The pressure of the flow path is increased, and at the same time, the pressure in the second chamber C2 of the pilot valve 100 is also increased, and the diaphragm 140 is broken.

However, even if the pressure of the secondary side (P2) of the main valve (10) rises, the pressure reducing valve that prevents the diaphragm from being damaged due to the overpressure according to the embodiment of the present invention, (140) is not damaged.

That is, as shown in 5e, when the pressure in the second chamber C2 exceeds the set pressure in a state where the blocking unit 170 of the pilot valve 100 blocks the flow path, the diaphragm 140 is pressurized .

At this time, as the diaphragm 140 rises, a force for upward movement of the up-and-down unit 150 is also generated. As a result, when the shut-off unit 170 blocks the flow path of the main valve 10 Only the ascending and descending unit 150 overcomes the elastic force of the adjustment spring 125 and the stem tightening spring 162 and ascends upward so that the clamping sheet O-ring 157 and the step portion 163 of the stem 160 are separated from each other The flow path is formed and the pressure in the second chamber C2 is directed to the first chamber C1 provided with the pressure regulating part 120 through the flow path to prevent the diaphragm 140 from being damaged.

Thereafter, the pressure introduced into the first chamber C1 is discharged to the outside through the drain hole 121 formed at one side of the housing 122, and when the overpressure is released by the discharge of the pressure to the outside, The clamping sheet O-ring 157 and the step portion 163 of the stem 160 are brought into contact with each other by the elastic force of the spring 125 and the stem tightening spring 162,

Therefore, it is possible to prevent the breakage of the diaphragm 140, which can prevent the breakage of the diaphragm due to the overpressure according to the embodiment of the present invention, , And the maintenance cost can be reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: Pilot valve 110: Body
111: inlet 112: outlet
120: Pressure regulator 121: Drainer
122: housing 123: adjusting screw
124: topsheet 125: regulating spring
130: breaking portion 140: diaphragm
150: Up / down unit 151: Lower plate
152: Clamping bolt 153: Clamping nut
154: upper plate 155: O-ring retainer
156: Clamping sheet 157: Clamping sheet O-ring
160: Stem 162: Stem tightening spring
163: step unit 170: interrupting unit
172: disc sheet 174: disc

Claims (3)

A body having an inlet and an outlet formed therein and having a flow passage for connecting the inlet and the outlet; a pressure regulator disposed at an upper portion of the body to adjust the pressure; And a shielding portion for shielding the flow path of the body,
The pressure regulator
A housing having a housing space formed therein and having a drain hole at one side thereof, an adjusting screw threadably coupled to the housing to penetrate the housing, and a topsheet provided at the bottom of the housing, And an adjustment spring located under the topsheet,
The blocking portion
A diaphragm positioned to divide an accommodation space in the housing into upper and lower portions, an up-down unit fixedly connected to upper and lower sides of the diaphragm and having an upper side elastically supported by an adjustment spring of the pressure control unit, And the upper end of the stem is installed to be elastically supported by the lifting / lowering unit through a stem tightening spring. The blocking unit is installed at the lower end of the stem to open / close the flow path in the body according to the rising / Lt; / RTI >
The ascending / descending unit
A lower plate positioned below the diaphragm,
A clamping bolt supporting the lower plate at a lower portion thereof and having a center portion passing through the lower plate and the diaphragm,
A pressure regulating valve disposed at an upper portion of the diaphragm and including a central portion of a clamping bolt penetrating the diaphragm and an upper plate fixedly coupled by a clamping nut to prevent breakage of the diaphragm due to overpressure.
delete [2] The apparatus of claim 1,
A clamping sheet O-ring formed at an inner center portion of the clamping bolt so as to form a flow path when the stem is not in contact with the stem,
An O-ring retainer screwed to the inner circumferential surface of the clamping bolt to support the O-ring of the clamping sheet from below
And a clamping sheet for supporting the clamping sheet O-ring at the upper portion of the clamping sheet so as to prevent breakage of the diaphragm due to overpressure.
KR1020140023931A 2014-02-28 2014-02-28 a pressure reducint valve for preventing damage of diaphragm by over pressure KR101437080B1 (en)

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KR1020140023931A KR101437080B1 (en) 2014-02-28 2014-02-28 a pressure reducint valve for preventing damage of diaphragm by over pressure

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101988800B1 (en) * 2018-07-17 2019-09-24 한국수력원자력 주식회사 Pipe isolation apparatus
KR102032458B1 (en) * 2018-06-12 2019-10-15 울트라밸브 주식회사 Apparatus for controlling of reducing valve using fluid in pipe
KR20190138055A (en) 2018-06-04 2019-12-12 (주) 삼진정밀 Bottom-operated sleeve valve for actuator control for water tank installation
KR20190138056A (en) 2018-06-04 2019-12-12 (주) 삼진정밀 Discharge pipe for water tank internal pressure control

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200327655Y1 (en) * 2003-06-19 2003-09-22 신재보 Decompression valve
KR20090127859A (en) * 2009-11-18 2009-12-14 유운상 Check type pressure reducing valve

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200327655Y1 (en) * 2003-06-19 2003-09-22 신재보 Decompression valve
KR20090127859A (en) * 2009-11-18 2009-12-14 유운상 Check type pressure reducing valve

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190138055A (en) 2018-06-04 2019-12-12 (주) 삼진정밀 Bottom-operated sleeve valve for actuator control for water tank installation
KR20190138056A (en) 2018-06-04 2019-12-12 (주) 삼진정밀 Discharge pipe for water tank internal pressure control
KR102032458B1 (en) * 2018-06-12 2019-10-15 울트라밸브 주식회사 Apparatus for controlling of reducing valve using fluid in pipe
KR101988800B1 (en) * 2018-07-17 2019-09-24 한국수력원자력 주식회사 Pipe isolation apparatus

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