CN103542153A - Overpressure prevention pressure-relief valve - Google Patents

Overpressure prevention pressure-relief valve Download PDF

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Publication number
CN103542153A
CN103542153A CN201310521913.3A CN201310521913A CN103542153A CN 103542153 A CN103542153 A CN 103542153A CN 201310521913 A CN201310521913 A CN 201310521913A CN 103542153 A CN103542153 A CN 103542153A
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CN
China
Prior art keywords
valve
hole
piston
valve rod
pressure
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Granted
Application number
CN201310521913.3A
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Chinese (zh)
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CN103542153B (en
Inventor
柴为民
陈永新
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HANGZHOU CHUNJIANG VALVE CO Ltd
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HANGZHOU CHUNJIANG VALVE CO Ltd
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Priority to CN201310521913.3A priority Critical patent/CN103542153B/en
Publication of CN103542153A publication Critical patent/CN103542153A/en
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Publication of CN103542153B publication Critical patent/CN103542153B/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
    • 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
    • F16K17/048—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 combined with other safety valves, or with pressure control devices
    • 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
    • F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)

Abstract

The invention discloses an overpressure prevention pressure-relief valve which comprises a valve body, wherein a water feeding cavity, a water discharging cavity, an upper through hole, a lower through hole and a transverse partition wall with a vertical through hole are arranged on the valve body. A screw assembly and a valve rod assembly have the same center line and are arranged in the valve body vertically. The valve rod assembly comprises a valve rod, a piston and a sealing seat, wherein the piston is in slide match with the upper through hole of the valve body, a sealing gasket is arranged on the sealing seat, the sealing gasket and a lower annular cutting edge of the vertical through hole in the partition wall form a valve port, and the lower end of the valve rod is in slide match with a lower valve cover blind hole formed perpendicular to the center of a lower valve cover. The piston is provided with an inner hole, a valve rod head is connected onto the inner hole, a safety valve is arranged in the inner hole, and the safety valve comprises a slide valve, a valve seat and a plurality of pressure-relief holes matched with the safety valve. When the pressure of the inlet cavity is higher than the preset value and the valve port of the pressure-relief valve is closed, the safety valve is opened to enable the pressure of an inlet cavity to be released to an outlet cavity.

Description

Superpressure preventing reduction valve
Technical field
The present invention relates to a kind of valve, relate in particular to a kind of superpressure preventing reduction valve.
Background technique
The reduction valve of prior art its valve port under water supply condition is opened, and when upstream hydraulic pressure significantly raises suddenly for a certain reason, high pressure water can pass through valve port propagates down stream, so the pressure in upstream line and valve inlet chamber can significantly not raise.But in downstream user, do not need in the situations such as water, valve port is closed.Now the high pressure water of upstream cannot pass through valve port propagates down stream, therefore the significantly rising of upstream line and valve inlet cavity pressure will be caused, cause upstream line to bear the leakage of superpressure and valve, the destruction of pipeline and valve housing even, for plastic pipe and adopt valve that resin is housing more so.
Summary of the invention
Main purpose of the present invention is: solve the existing deficiency of prior art, thereby develop, a kind ofly significantly raise when upstream line and valve inlet cavity pressure, and downstream user does not need to supply water, valve port is closed etc. in situation, open the safety-valve, the superpressure preventing reduction valve of releasing to outlet plenum.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: a kind of superpressure preventing reduction valve, tool
There is valve body, valve body substantially horizontal is respectively equipped with the consistent water-inlet cavity of center line and water chamber, between two chambeies, be provided with the across bulkhead with vertical through hole, valve body is upper and lower to be had through hole and is provided with bonnet and bottom flange, vertical screw arbor assembly and the valve rod assembly with same center line that be provided with in the cavity forming with upper and lower valve gap at valve body, and intersect vertically with the horizontal center line into and out of water cavity, described valve rod assembly is connected with diaphragm, it is characterized in that:
Described valve rod assembly comprises valve rod, be positioned at the piston of valve rod top and be positioned at the sealing seat of valve rod middle and lower part;
The upper through hole cunning of described piston and valve body is joined, and sealing seat is provided with sealing gasket, and with partition wall on the annular sword limit of vertical through hole below form valve port, the bottom flange blind hole cunning of the lower end of valve rod and the setting of bottom flange central vertical is joined;
Described piston has endoporus, is connected with stem head above, is inside provided with safety valve, when the pressure of snout cavity surpasses setting value and valve port and closes, by opening of safety valve, the pressure of snout cavity is released to outlet plenum.
Technological scheme of the present invention can also be further perfect:
As preferably, described safety valve comprises guiding valve, is provided with valve seat below guiding valve, and the some pressure release apertures that coordinate with it;
A bottom blind hole, the valve seat that the annular sword limit of bottom blind hole surrounding projection is safety valve are arranged at the piston inner hole bottom of described valve rod top;
Described guiding valve cunning fits in the endoporus of piston, and bottom is provided with sealing gasket two, and as the flap of safety valve, top is provided with blind hole, and cylindrical is provided with some cannelures, and the ring surface at top is provided with some radial grooves that communicate with cannelure;
Described stem head cylindrical surrounding is provided with several stem head radial holes, is communicated with endoporus and the outlet plenum of piston, and bottom is provided with step-shaped blind hole;
Between the blind hole of stem head and guiding valve, be provided with spring three, spring three has certain pretightening force after installing, and pretightening force is opened pressure design by safety valve;
The piston of the valve rod top small column of having gone to the bottom, described small column surrounding is provided with some small column radial holes, communicates with bottom blind hole, is communicated with endoporus and the snout cavity of piston after safety valve is opened.
The invention has the beneficial effects as follows:
In the situation that downstream does not need the valve ports such as water to close, when causing for a certain reason snout cavity pressures significantly to raise, while reaching the setting value of safety valve, high pressure water is opened safety valve, to outlet plenum, release, thereby prevented the further rising of snout cavity pressures, make snout cavity pressures be controlled at pipeline or below valve pressure allowed to bear, when snout cavity pressures is reduced to the setting pressure of safety valve when following, safety valve cuts out automatically, thereby prevents that the accident that upstream line and valve housing destroy from occurring.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of structural representation of the present invention;
Accompanying drawing 2 is valve rod top safety valve structure enlarged views of Fig. 1.
Description of reference numerals: 1, bottom flange, 2, valve body, 3, spring two, 4, valve rod, 5, O-ring seals one, 6, diaphragm, 7, pressing plate, 8, spring one, 9, spring seat, 10, screw rod, 11, bonnet, 12, outer cover, 13, stem head, 14, spring three, 15, guiding valve, 16, sealing gasket two, 17, sealing gasket one, 18, sealing seat, 19, O-ring seals two;
P1, snout cavity pressures, P2, outlet plenum pressure, A, snout cavity, B, outlet plenum, V, valve port, a, stem head radial hole, b, small column radial hole, c, cannelure, d, radial groove, e, endoporus, f, bottom blind hole, g, vertical through hole.
Embodiment
Below by embodiment also by reference to the accompanying drawings, technological scheme of the present invention is further described in detail.
Embodiment:
Superpressure preventing reduction valve as shown in Figure 1, 2, has valve body 2, and it is consistent that valve body 2 substantially horizontals are respectively equipped with center line
Water-inlet cavity A and water chamber B, between two chambeies, be provided with the across bulkhead with vertical through hole g, valve body 2 is upper and lower to be had upper and lower through hole and is provided with bonnet 11 and bottom flange 1, vertical screw arbor assembly and the valve rod assembly of being provided with in the cavity forming with upper and lower valve gap 11,1 at valve body 2, described screw arbor assembly and valve rod assembly have same center line, and intersect vertically with the horizontal center line into and out of water cavity A, B.Described screw arbor assembly is in order to adjust mouth pressure, and described valve rod assembly comprises valve rod 4, be positioned at the piston of valve rod top and be positioned at the sealing seat 18 of valve rod middle and lower part; The upper through hole cunning of described piston and valve body is joined, and sealing seat 18 is provided with sealing gasket 1, and with partition wall on the annular sword limit of vertical through hole below form valve port V, the bottom flange blind hole cunning of the lower axostylus axostyle of valve rod 4 and the setting of bottom flange central vertical is joined; The vertically disposed bottom flange blind hole of the upper through hole of valve body 2 and bottom flange 1 is as the pilot hole of valve rod assembly motion.
Innovative point of the present invention is to be provided with a safety valve in the endoporus e of valve rod top piston.
A blind hole f is arranged at the endoporus e bottom of valve rod 4 top pistons, and the annular sword limit of blind hole surrounding projection is as the valve seat of safety valve.Guiding valve 15 is sliding to be fitted in endoporus e, and bottom is provided with sealing gasket 2 16, and as the flap of safety valve, top is provided with blind hole, and cylindrical is provided with 2-4 bar cannelure c, and the ring surface at top is provided with the radial groove d that 2-4 bar communicates with cannelure c.
Stem head 13 is threaded with the endoporus e of valve rod 4 top pistons, stem head cylindrical surrounding is provided with 2-4 radial hole a, be communicated with endoporus e and outlet plenum B, stem head bottom is provided with step-shaped blind hole, and the screw rod above stem head is consolidated with nut and diaphragm 6 and pressing plate 7.Between the blind hole of stem head 13 and guiding valve 15, be provided with spring 3 14, spring 3 14 has certain pretightening force after installing, and pretightening force is opened pressure design by safety valve.Therefore, rear safety valve being installed closes; The piston of the valve rod top small column of having gone to the bottom, small column surrounding is provided with 2-4 radial hole b, and blind hole f communicates with bottom, is communicated with endoporus e and snout cavity A after safety valve is opened.The middle and lower part of valve rod 4 is consolidated sealing gasket 1 and sealing seat 18 with nut, and sealing gasket 1 is as the flap of valve valve port V.There is a vertical through hole g at the middle part of valve body 2 across bulkheads, and the annular sword limit of below is as the valve seat of valve valve port V; The axostylus axostyle cunning of valve rod 4 lower ends fits in the bottom flange 1 corresponding blind hole in center, and 2 inclined holes of blind hole below are the gas-tight phenomenons while preventing valve rod 4 motion; Above-mentioned each part is installed CB and is positioned on same vertical line, and intersects vertically with the horizontal center line of importing and exporting.The outer round and smooth of valve rod 4 top pistons fits in the valve body 2 corresponding endoporus in top, the bottom flange blind hole that this endoporus and bottom flange 1 central vertical arrange is as the pilot hole of valve rod assembly motion, importing and exporting under the acting in conjunction of hydraulic pressure and spring 1, valve rod assembly can move by easy on and off, to guarantee that delivery pressure P2 remains on setting value; In piston external diameter groove, being provided with O-ring seals 1 leaks to water chamber from water-inlet cavity in order to prevent medium.
In the situation that valve port is closed, be how to eliminate snout cavity superpressure:
In the situation that downstream does not need the valve ports such as water to close, when causing for a certain reason snout cavity pressures P1 significantly to raise, while reaching the setting value of safety valve, high pressure water overcomes the pressure of spring 3 14 through small column radial hole b and bottom blind hole f, safety valve is opened, then through cannelure c, radial groove d arrives endoporus e, through stem head radial hole a, to outlet plenum B, release again, prevented thus the further rising of snout cavity pressures P1, make P1 be controlled at pipeline or below valve pressure allowed to bear, when inlet pressure P1 is reduced to the setting pressure of safety valve when following, guiding valve 15 resets under the pressure of spring 3 14, safety valve cuts out.

Claims (2)

1. a superpressure preventing reduction valve, has valve body (2), and it is consistent that valve body (2) substantially horizontal is respectively equipped with center line
Water-inlet cavity (A) and water chamber (B), between two chambeies, be provided with the across bulkhead with vertical through hole, valve body (2) is upper and lower to be had through hole and is provided with bonnet (11) and bottom flange (1), vertical screw arbor assembly and the valve rod assembly with same center line that be provided with in the cavity forming with upper and lower valve gap (11), (1) at valve body (2), and intersect vertically with the horizontal center line into and out of water cavity (A), (B), described valve rod assembly is connected with diaphragm, it is characterized in that:
Described valve rod assembly comprises valve rod (4), be positioned at the piston of valve rod top and be positioned at the sealing seat (18) of valve rod middle and lower part;
The upper through hole cunning of described piston and valve body (2) is joined, sealing seat (18) is provided with sealing gasket, and with across bulkhead on the annular sword limit of vertical through hole (g) below form valve port (V), the bottom flange blind hole cunning of the lower end of valve rod (4) and the setting of bottom flange central vertical is joined;
Described piston has endoporus (e), is connected with stem head (13) above, is inside provided with safety valve; When the pressure of snout cavity surpasses setting value, by the effect of safety valve, the pressure of snout cavity (A) is released to outlet plenum (B).
2. superpressure preventing reduction valve according to claim 1, is characterized in that:
Described safety valve comprises guiding valve (15), is provided with valve seat below guiding valve, and the some pressure release apertures that coordinate with it;
A bottom blind hole (f), the valve seat that the annular sword limit of bottom blind hole surrounding projection is safety valve are arranged at endoporus (e) bottom of described valve rod (4) top piston;
Described guiding valve (15) is sliding to be fitted in the endoporus (e) of piston, bottom is provided with sealing gasket two (16), and as the flap of safety valve, top is provided with blind hole, cylindrical is provided with some cannelures (c), and the ring surface at top is provided with some radial grooves (d) that communicate with cannelure (c);
Described stem head (13) cylindrical surrounding is provided with several stem head radial holes (a), is communicated with the endoporus (e) and outlet plenum (B) of piston, and bottom is provided with step-shaped blind hole;
Between the blind hole of stem head (13) and guiding valve (15), be provided with spring three (14), spring three (14) has certain pretightening force after installing;
The piston of valve rod (4) the top small column of having gone to the bottom, described small column surrounding is provided with some small column radial holes (b), communicates with bottom blind hole (f), is communicated with the endoporus (e) and snout cavity (A) of piston after safety valve is opened.
CN201310521913.3A 2013-10-30 2013-10-30 Overpressure prevention pressure-relief valve Active CN103542153B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN103542153B CN103542153B (en) 2015-08-26

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104329485A (en) * 2014-09-24 2015-02-04 杭州春江阀门有限公司 Multifunctional combination valve
CN107269878A (en) * 2017-08-01 2017-10-20 无锡斯沃特流体控制技术有限公司 Self-supporting V-type controls ball valve

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1698815A1 (en) * 2005-03-04 2006-09-06 Mesura Operating device of a safety valve of a gas regulator
CN202065512U (en) * 2011-05-30 2011-12-07 上海阀门厂有限公司 Spring-type safety valve for pressure stabilizer
CN202733089U (en) * 2012-06-21 2013-02-13 浙江科海仪表有限公司 Pressure release type self-operated pressure regulator
CN203067873U (en) * 2012-12-26 2013-07-17 四川航空工业川西机器有限责任公司 Super high pressure normally-closed type air control stop valve
CN203549028U (en) * 2013-10-30 2014-04-16 杭州春江阀门有限公司 Overpressure prevention pressure reducing valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1698815A1 (en) * 2005-03-04 2006-09-06 Mesura Operating device of a safety valve of a gas regulator
CN202065512U (en) * 2011-05-30 2011-12-07 上海阀门厂有限公司 Spring-type safety valve for pressure stabilizer
CN202733089U (en) * 2012-06-21 2013-02-13 浙江科海仪表有限公司 Pressure release type self-operated pressure regulator
CN203067873U (en) * 2012-12-26 2013-07-17 四川航空工业川西机器有限责任公司 Super high pressure normally-closed type air control stop valve
CN203549028U (en) * 2013-10-30 2014-04-16 杭州春江阀门有限公司 Overpressure prevention pressure reducing valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104329485A (en) * 2014-09-24 2015-02-04 杭州春江阀门有限公司 Multifunctional combination valve
CN107269878A (en) * 2017-08-01 2017-10-20 无锡斯沃特流体控制技术有限公司 Self-supporting V-type controls ball valve
CN107269878B (en) * 2017-08-01 2023-06-30 无锡斯沃特流体控制技术有限公司 Self-supporting V-shaped control ball valve

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