CN108223833A - 150MPa super high pressure fluid pressure regulator valves - Google Patents

150MPa super high pressure fluid pressure regulator valves Download PDF

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Publication number
CN108223833A
CN108223833A CN201810099359.7A CN201810099359A CN108223833A CN 108223833 A CN108223833 A CN 108223833A CN 201810099359 A CN201810099359 A CN 201810099359A CN 108223833 A CN108223833 A CN 108223833A
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CN
China
Prior art keywords
spool
valve seat
high pressure
look nut
super high
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201810099359.7A
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Chinese (zh)
Other versions
CN108223833B (en
Inventor
潘祥祥
王洪仁
鲍先启
彭宗元
万杰
肖玉林
郑敏
赵海军
沈家欢
陆斌斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZHEJIANG DANAU INDUSTRIES Co Ltd
Original Assignee
ZHEJIANG DANAU INDUSTRIES Co Ltd
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Publication date
Application filed by ZHEJIANG DANAU INDUSTRIES Co Ltd filed Critical ZHEJIANG DANAU INDUSTRIES Co Ltd
Priority to CN201810099359.7A priority Critical patent/CN108223833B/en
Publication of CN108223833A publication Critical patent/CN108223833A/en
Application granted granted Critical
Publication of CN108223833B publication Critical patent/CN108223833B/en
Active legal-status Critical Current
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10Valves; Arrangement of valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10Valves; Arrangement of valves
    • F04B53/1085Valves; Arrangement of valves having means for limiting the opening height
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/44Mechanical actuating means
    • F16K31/50Mechanical actuating means with screw-spindle or internally threaded actuating means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K35/00Means to prevent accidental or unauthorised actuation
    • F16K35/06Means to prevent accidental or unauthorised actuation using a removable actuating or locking member, e.g. a key
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00Means in valves for absorbing fluid energy
    • F16K47/08Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths

Landscapes

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

Abstract

The present invention provides a kind of 150MPa super high pressure fluids pressure regulator valves, belong to high pressure hydraulic end voltage-regulating technique field.It includes valve body, valve seat is equipped in the valve body, body base is bolted with backwater joint, the spool being inserted into there are one being set in valve body in valve seat, the spool bottom is inserted into valve seat and spool bottom is the conical surface, body top is bolted with look nut, and the look nut is pressed at the top of spool.Look nut of the present invention makes the position between spool and valve seat immobilize, and can prevent the bounce of pressure regulation back valve core from causing plunger pump surging.

Description

150MPa super high pressure fluid pressure regulator valves
Technical field
The invention belongs to high pressure hydraulic end voltage-regulating technique fields, are related to a kind of 150MPa super high pressure fluids pressure regulator valve.
Background technology
During super-pressure fluid end pressure regulation, pressure is usually adjusted in the range of 0-150MPa, the adjusting of pressure uses pressure regulation Valve controls, and existing super-pressure pressure regulator valve is all to use spring compression spool, and since the manufacture of spring is there are error, in phase With pressure bottom spool and the openings of sizes of valve seat can cause different, this pressure adjusting structure using spring, pressure regulator valve makes Used time spool can have the phenomenon that bounce, and so as to make plunger pump, there are flow pulsations.
Invention content
Regarding the issue above, the present invention provides a kind of 150MPa super high pressure fluids pressure regulator valve.
In order to achieve the above objectives, present invention employs following technical proposals:A kind of 150MPa super high pressure fluids pressure regulator valve, packet It includes valve body, valve seat is equipped in the valve body, body base is bolted with backwater joint, sets that there are one be inserted into valve seat in valve body In spool, the spool bottom is inserted into valve seat and spool bottom is the conical surface, and body top is bolted with look nut, institute The look nut stated is pressed at the top of spool.
In above-mentioned 150MPa super high pressure fluid pressure regulator valves, a valve seat positioning sleeve, valve are additionally provided in the valve body Core passes through valve seat positioning sleeve, and valve seat positioning sleeve is located above valve seat and is engaged by clamping with valve seat.
In above-mentioned 150MPa super high pressure fluid pressure regulator valves, be connected on the spool can to spool generate thrust from And spool is made to spring back resetting-mechanism to the low pressure that the direction far from valve seat accelerates.
In above-mentioned 150MPa super high pressure fluid pressure regulator valves, low pressure rebound resetting-mechanism includes being clamped with spool The spring base of cooperation, and the spring that is set on spool, the both ends of spring bear against valve seat positioning sleeve and spring base.
In above-mentioned 150MPa super high pressure fluid pressure regulator valves, sealing ring, spring base inner wall are arranged on the spool It is clamped with sealing ring.
In above-mentioned 150MPa super high pressure fluid pressure regulator valves, the look nut bottom is removably there are one clampings Nut seat, the nut seat are pressed on spool.
In above-mentioned 150MPa super high pressure fluid pressure regulator valves, set in the look nut there are one pressure regulation spiral shell can be locked Mother is in the look nut retaining mechanism of valve inner position.
In above-mentioned 150MPa super high pressure fluid pressure regulator valves, the look nut retaining mechanism includes being screwed onto pressure regulation The stop screw of nut interior and at least by two panels limiting gasket enclose in circular ring shape spacing collar, in spacing collar gather There is steel ball, when stop screw is screwed into look nut inside, the top of stop screw contacts with steel ball and squeezes steel ball and holds out against Limiting gasket inner wall is so as to which the direction for making limiting gasket to close valve interior wall moves and the outer wall of limiting gasket is made to hold out against valve body Inner wall.
In above-mentioned 150MPa super high pressure fluid pressure regulator valves, the axial line of stop screw and the axial line weight of look nut Close, also pressure is set there are one positioning bead above the steel ball in the spacing collar, the positioning bead just with the end of stop screw Portion corresponds to.
In above-mentioned 150MPa super high pressure fluid pressure regulator valves, a buffer bar, institute are connected in the backwater joint Overflow ducts are equipped in the buffer bar stated, the spout hole of several connection overflow ducts is equipped on buffer bar.
Compared with prior art, the advantage of the invention is that:
1st, look nut makes the position between spool and valve seat immobilize, and can prevent the bounce of pressure regulation back valve core from causing column Fill in pump surging.
2nd, multiple apertures that the high-pressure fluid that the design of buffer bar goes out overflow passes through on buffer bar project, and reach reduction pressure The purpose of power avoids high-pressure fluid from directly impacting other parts, and it is caused to damage;In addition, pass through trepanning on buffer bar Size and quantity, which may be set in, retains a part of pressure inside buffer bar, avoid the fluid of overflow switched to by high pressure rapidly it is low Bubble is generated during pressure causes cavitation effect to damage spool and sealing surface of seat.
3rd, the setting of low pressure rebound resetting-mechanism enables the spool when adjusting look nut reduction pressure more rapid Action.
4th, the setting of look nut retaining mechanism after design of pressure is good, can be very good locking look nut.
Part is illustrated to embody by further advantage, target and the feature of the present invention by following, and part will also be by this The research and practice of invention and be understood by the person skilled in the art.
Description of the drawings
Fig. 1 is the structure diagram of the present invention;
Fig. 2 is the explosive view of the present invention.
In figure, valve body 1, valve seat 2, backwater joint 3, spool 4, look nut 5, valve seat positioning sleeve 6, low pressure rebound reset machine Structure 7, spring base 8, spring 9, sealing ring 10, nut seat 11, look nut retaining mechanism 12, stop screw 13, limiting gasket 14, Limiting slot 14a, steel ball rolling channel 14b, spacing collar 15, steel ball 16, positioning bead 17, buffer bar 18, overflow ducts 19, spout hole 20, Runner 100, water inlet end 101, water outlet 102.
Specific embodiment
As depicted in figs. 1 and 2, a kind of 150MPa super high pressure fluids pressure regulator valve including valve body 1, is equipped in the valve body 1 Valve seat 2, valve seat 2 are equipped with runner 100, and water inlet end 101 and water outlet are respectively equipped on valve body 1 and positioned at the both sides of runner 100 End 102,1 bottom of valve body is bolted with backwater joint 3, sets that there are one be inserted into spool 4 in valve seat 2, the valve in valve body 1 4 bottom of core is inserted into valve seat 2 and 4 bottom of spool is the conical surface, and body top is bolted with look nut 5, the look nut 5 It is pressed on 4 top of spool.
Existing super-pressure pressure regulator valve be all using spring compression spool, and since the manufacture of spring is there are error, Identical pressure bottom spool and the openings of sizes of valve seat can cause different, and this pressure adjusting structure using spring, pressure regulator valve exists Spool can have the phenomenon that bounce during use, and so as to make plunger pump, there are flow pulsations.In addition, the structure using spring needs Valve inner has the installation space of bigger, makes pressure regulator valve that can not minimize.
In the present embodiment, when pressurized fluid enters valve body 1, pressure act on 4 conical surface of spool so as to push spool 4 to Upper activity, turn look nut 5, look nut compress spool 4, realize pressure regulation, during pressure regulation or after pressure regulation, adjust The position of pressure nut 5 and spool 4 between the two is to limit, and will not be changed, spool will not beat in valve seat, plunger pump It will not there are flow pulsations.
Specifically, a valve seat positioning sleeve 6 is additionally provided in valve body 1, valve seat positioning sleeve 6 is tightly connected with valve inner, Spool 4 passes through valve seat positioning sleeve 6, and valve seat positioning sleeve 6 is located at 2 top of valve seat and is engaged by clamping with valve seat 2, the position of runner 100 It is corresponding with water inlet end 101 and water outlet 102, by changing openings of sizes between the bottom of spool 4 and runner 100, realize pressure regulation Purpose.
When the upward turn of look nut, the pressure of fluid that the conical surface of spool 4 is subject to becomes smaller, although the pressure can also push away Movable valve plug rises, but in the present embodiment, may be connected on spool 4 there are a defaulted process, to overcome the defaulted process Thrust can be generated to spool 4 so as to which spool 4 be made to spring back resetting-mechanism 7 to the low pressure that the direction far from valve seat 2 accelerates.
Specifically, low pressure rebound resetting-mechanism 7 includes the spring base 8 that is engaged by clamping with spool 4, and be set in valve Spring 9 on core 4, the both ends of spring 9 bear against valve seat positioning sleeve 6 and spring base 8.
When look nut is rotated up, look nut bottom can be temporarily disengaged from the top of spool, and 9 compressed bullet of spring It pushes flexible spring seat 8 to rise, spring base 9 pushes spool 4 to rise, so as to fulfill spool quick response.
Sealing ring 10 is arranged on spool 4,8 inner wall of spring base is clamped with sealing ring 10, specifically, 9 inner wall of spring base The clamping step that setting coordinates with sealing ring 10 is formed by sealing ring and is clamped.That is, when spool declines, sealing ring pushes Spring base declines, and when spring base rises, spring base pushes sealing ring to rise, and band movable valve plug rises.Those skilled in the art should Work as understanding, the high sealing ring of tensile strength may be selected in sealing ring 10, so as to make assembly or disassembly more convenient.
5 bottom of look nut is removably clamped there are one nut seat 11, and the nut seat 11 is pressed on spool 4. In process, look nut 5 would generally use material easy to process such as Copper fabrication, and copper easily becomes after being contacted with spool Shape, therefore by the harder nut seat 11 of material, play a protective role to look nut 5.
It is connect since look nut uses to be spirally connected with valve body, may be true there are certain machining deviation between silk mouth It protects after the completion of pressure regulation, position of the look nut in valve body immobilizes.It can be locked there are one being set in the look nut 5 of this implementation Determine look nut retaining mechanism 12 of the look nut 5 in 1 interior location of valve body.
Specifically, look nut retaining mechanism 12 includes being screwed onto the stop screw 13, Yi Jizhi inside look nut 5 Few spacing collar 15 enclosed by two panels limiting gasket 14 in circular ring shape, steel ball 16 is densely covered in spacing collar 15, works as stop screw 13 to the inside of look nut 5 when being screwed into, and the top of stop screw 13, which contacts with steel ball 16 and squeezes steel ball 16, holds out against limiting gasket 14 inner walls are so as to which the direction for making limiting gasket 14 to 1 inner wall of close valve body moves and the outer wall of limiting gasket 14 is made to hold out against valve body 1 Inner wall.
The operation principle of look nut retaining mechanism 12 is, by the use of steel ball as the power for pushing limiting gasket 14, so as to make Limiting gasket holds out against with valve body and contacts.
More specifically, with reference to shown in Fig. 2, look nut is equipped with the limiting slot 14a for placing limiting gasket 14, limit Position washer 14 is fastened in limiting slot, and look nut is equipped with several steel ball rolling channel 14b for being used to place steel ball 16, and steel ball 16 is close Cloth is in steel ball raceway 14b and can be along steel ball rolling path rolling, and several steel ball raceways are connected inside look nut and connectivity part position In 13 lower section of stop screw.
Steel ball raceway has several and is arranged radially, preferably 4 steel ball raceways.
The axial line of stop screw 13 is overlapped with the axial line of look nut 5, on the steel ball 16 in the spacing collar 15 Positioning bead 17 there are one setting just also is pressed, the positioning bead 17 is just corresponding with the end of stop screw 13.
A buffer bar 18 is connected in backwater joint 3, overflow ducts 19 are equipped in the buffer bar 18, in buffer bar 18 are equipped with the spout hole 20 of several connection overflow ducts 19.The high-pressure fluid that the design of buffer bar goes out overflow passes through buffer bar On multiple spout holes 20 project, achieve the purpose that reduce pressure, high-pressure fluid is avoided directly to impact other parts, and from being made to it Into damage.Part pressure can be retained according to being set in inside buffer bar by the size and quantity of buffer bar overflow discharge orifice 20 Power avoids the fluid of overflow from generating bubble when switching to low pressure by high pressure rapidly and causes cavitation effect to spool and sealing surface of seat It damages.
The present invention operation principle be:
When needing to tune up fluid power end pressure, downward turn look nut 5, nut seat 11 pushes spool 4 to move downward, bullet Spring 9 compresses, and the opening between spool 4 and valve seat 2 becomes smaller namely the contact area increase of runner 100 and the conical surface of spool 4, liquid Power end pressure becomes larger.After pressure regulation, downward turn stop screw 13 pushes positioning bead 17 downward, and positioning bead squeezes steel ball 16, Steel ball pushes limiting gasket 14 to hold out against 1 inner wall of valve body, and position of the look nut 5 in valve body 1 is fixed.
When needing to turn down fluid power end pressure, rotation look nut is upward, and spool is in spring force and action of hydraulic force Lower rapid increase, the opening between spool and valve seat become larger, and fluid power end pressure becomes smaller.
Specific embodiment described herein is only an example for the spirit of the invention.Technology belonging to the present invention is led The technical staff in domain can do various modifications or additions to described specific embodiment or replace in a similar way In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Although valve body 1, valve seat 2, backwater joint 3, spool 4, look nut 5, valve seat positioning sleeve is used more herein 6th, low pressure rebound resetting-mechanism 7, spring base 8, spring 9, sealing ring 10, nut seat 11, look nut retaining mechanism 12, limiting spiral shell Nail 13, limiting gasket 14, limiting slot 14a, steel ball rolling channel 14b, spacing collar 15, steel ball 16, positioning bead 17, buffer bar 18, overflow The terms such as channel 19, spout hole 20, runner 100, water inlet end 101, water outlet 102, but be not precluded using other terms can It can property.The use of these items is only for more easily describing and explaining the essence of the present invention, it is construed as any one The additional limitation of kind is all disagreed with spirit of the present invention.

Claims (10)

1. including valve body (1), valve seat (2), valve body are equipped in the valve body (1) for a kind of 150MPa super high pressure fluids pressure regulator valve (1) bottom is bolted with backwater joint (3), is set in valve body (1) there are one the spool (4) being inserted into valve seat (2), feature exists In the spool (4) bottom is inserted into valve seat (2) and spool (4) bottom is the conical surface, and body top is bolted with look nut (5), the look nut (5) is pressed at the top of spool (4).
2. 150MPa super high pressure fluids pressure regulator valve according to claim 1, which is characterized in that in the valve body (1) also If there are one valve seat positioning sleeve (6), spool (4) across valve seat positioning sleeve (6), valve seat positioning sleeve (6) above valve seat (2) and It is engaged by clamping with valve seat (2).
3. 150MPa super high pressure fluids pressure regulator valve according to claim 2, which is characterized in that connect on the spool (4) Spool (4) can be generated thrust by being connected to resets so as to which spool (4) be made to be sprung back to the low pressure that the direction far from valve seat (2) accelerates Mechanism (7).
4. 150MPa super high pressure fluids pressure regulator valve according to claim 3, which is characterized in that the low pressure rebound resets Mechanism (7) includes the spring base (8) that is engaged by clamping with spool (4), and the spring (9) that is set on spool (4), spring (9) both ends bear against valve seat positioning sleeve (6) and spring base (8).
5. 150MPa super high pressure fluids pressure regulator valve according to claim 4, which is characterized in that block on the spool (4) Equipped with sealing ring (10), spring base (8) inner wall is clamped with sealing ring (10).
6. 150MPa super high pressure fluids pressure regulator valve according to claim 1, which is characterized in that the look nut (5) Bottom is removably clamped there are one nut seat (11), and the nut seat (11) is pressed on spool (4).
7. 150MPa super high pressure fluids pressure regulator valve according to claim 1, which is characterized in that the look nut (5) Look nut retaining mechanism (12) of the look nut (5) in valve body (1) interior location can be locked there are one inside setting.
8. 150MPa super high pressure fluids pressure regulator valve according to claim 7, which is characterized in that the look nut locking Mechanism (12) is including being screwed onto the internal stop screw (13) of look nut (5) and at least being enclosed by two panels limiting gasket (14) The spacing collar (15) in circular ring shape is closed, is densely covered with steel ball (16) in the spacing collar (15), when stop screw (13) is to look nut (5) when inside is screwed into, the top of stop screw (13), which contacts with steel ball (16) and squeezes steel ball (16), holds out against limiting gasket (14) Inner wall is so as to which the direction for making limiting gasket (14) to close valve body (1) inner wall moves and the outer wall of limiting gasket (14) is made to hold out against valve The inner wall of body (1).
9. 150MPa super high pressure fluids pressure regulator valve according to claim 8, which is characterized in that the axle center of stop screw (13) Line is overlapped with the axial line of look nut (5), is also pressed above the steel ball (16) in the spacing collar (15) and is positioned there are one setting Pearl (17), the positioning bead (17) are just corresponding with the end of stop screw (13).
10. 150MPa super high pressure fluids pressure regulator valve according to claim 1, which is characterized in that the backwater joint (3) A buffer bar (18) is inside connected with, overflow ducts (19) is equipped in the buffer bar (18), is equipped on buffer bar (18) The spout hole (20) of several connection overflow ducts (19).
CN201810099359.7A 2018-01-30 2018-01-30 150MPa ultrahigh pressure fluid pressure regulating valve Active CN108223833B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810099359.7A CN108223833B (en) 2018-01-30 2018-01-30 150MPa ultrahigh pressure fluid pressure regulating valve

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Application Number Priority Date Filing Date Title
CN201810099359.7A CN108223833B (en) 2018-01-30 2018-01-30 150MPa ultrahigh pressure fluid pressure regulating valve

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CN108223833A true CN108223833A (en) 2018-06-29
CN108223833B CN108223833B (en) 2023-12-29

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112377297A (en) * 2020-11-16 2021-02-19 四川莱克斯流体控制设备有限公司 Multifunctional universal adjustable exhaust valve

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202884144U (en) * 2012-06-28 2013-04-17 阮云 High pressure water pressure regulating valve
CN104141813A (en) * 2013-05-06 2014-11-12 北京华德液压工业集团有限责任公司 Direct-acting overflow valve
CN205978679U (en) * 2016-08-30 2017-02-22 重庆红江机械有限责任公司 Ultrahigh pressure relief valve
CN207906499U (en) * 2018-01-30 2018-09-25 浙江大农实业股份有限公司 150MPa super high pressure fluid pressure regulator valves

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202884144U (en) * 2012-06-28 2013-04-17 阮云 High pressure water pressure regulating valve
CN104141813A (en) * 2013-05-06 2014-11-12 北京华德液压工业集团有限责任公司 Direct-acting overflow valve
CN205978679U (en) * 2016-08-30 2017-02-22 重庆红江机械有限责任公司 Ultrahigh pressure relief valve
CN207906499U (en) * 2018-01-30 2018-09-25 浙江大农实业股份有限公司 150MPa super high pressure fluid pressure regulator valves

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112377297A (en) * 2020-11-16 2021-02-19 四川莱克斯流体控制设备有限公司 Multifunctional universal adjustable exhaust valve
CN112377297B (en) * 2020-11-16 2022-05-27 四川莱克斯流体控制设备有限公司 Multifunctional universal adjustable exhaust valve

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