CN108547982B - A kind of controllable angle-style check-valves of aperture - Google Patents

A kind of controllable angle-style check-valves of aperture Download PDF

Info

Publication number
CN108547982B
CN108547982B CN201810229781.XA CN201810229781A CN108547982B CN 108547982 B CN108547982 B CN 108547982B CN 201810229781 A CN201810229781 A CN 201810229781A CN 108547982 B CN108547982 B CN 108547982B
Authority
CN
China
Prior art keywords
valve
sleeve
valves
valve core
core
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.)
Active
Application number
CN201810229781.XA
Other languages
Chinese (zh)
Other versions
CN108547982A (en
Inventor
朱荣生
安策
王秀礼
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.)
Jiangsu University
Original Assignee
Jiangsu University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jiangsu University filed Critical Jiangsu University
Priority to CN201810229781.XA priority Critical patent/CN108547982B/en
Publication of CN108547982A publication Critical patent/CN108547982A/en
Application granted granted Critical
Publication of CN108547982B publication Critical patent/CN108547982B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F16K15/00Check valves
    • F16K15/18Check valves with actuating mechanism; Combined check valves and actuated valves
    • 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
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32Details
    • F16K1/34Cutting-off parts, e.g. valve members, seats
    • F16K1/36Valve members
    • F16K1/38Valve members of conical shape
    • 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
    • F16K25/00Details relating to contact between valve members and seat
    • F16K25/005Particular materials for seats or closure elements
    • 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
    • F16K27/00Construction of housing; Use of materials therefor
    • F16K27/02Construction of housing; Use of materials therefor of lift valves
    • F16K27/0209Check valves or pivoted valves
    • 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
    • F16K27/00Construction of housing; Use of materials therefor
    • F16K27/02Construction of housing; Use of materials therefor of lift valves
    • F16K27/0254Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
    • 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
    • F16K27/00Construction of housing; Use of materials therefor
    • F16K27/08Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
    • 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
    • F16K31/02Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F16K31/047Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means

Abstract

The present invention relates to a kind of controllable angle-style check-valves of aperture, and the invention mainly comprises valve body, sleeve, big valve core, valve deck, valve rod, seal assembly, electric operators.Its principle is, by controlling the stroke of big valve core, to limit the stroke for four small valve cores arranged around it, small valve core under the force of a spring, realizes the non-return effect to fluid.Check-valves belongs to automatic valve class, is mainly used on the pipeline of medium one-way flow, only medium is allowed to flow to a direction, to try to avert accidents.And the place that the present invention is different from conventional check valves is, is shunted using four small valve cores, has preferable stability.On the other hand, the present invention can drive big valve core to control aperture by electric operator, be more in line with the automation control requirement of modern industry.The controllable angle-style check-valves of this aperture have it is easy to operate, it is easy for installation, it is safe and reliable the advantages that.

Description

A kind of controllable angle-style check-valves of aperture
Technical field
The present invention relates to check-valves technical fields, are related specifically to a kind of controllable angle-style check-valves of aperture.
Background technique
Check-valves refers to the valve for flowing by medium itself and automatically turning on, closing, also known as non-return valve, check valve, inverse Flow valve and counterbalance valve.Check-valves belongs to a kind of automatic valve, and main function is to prevent medium from flowing backwards, and prevents from pumping and driving electricity The water hammer pressure that generates when motivation is out of service suddenly and vessel media are released.Check-valves can also be used in therein The auxiliary system that pressure may be raised above system pressure is provided on the pipeline of supply.It is domestic at present to use most common check-valves master There are swing check valve, lift check valve, butterfly swing check valve, Slow Close Valve, ball check valve and multiple flow passages check-valves, Above-mentioned valve majority is applied in straight pipe, and is all that can only play on-off action, rarely has the check-valves for realizing controllable aperture Appear in it is present in the market.
The present invention relates to a kind of controllable angle-style check-valves of aperture, principles to be for summary of the invention, passes through the row of control big valve core Journey, to limit the stroke for four small valve cores arranged around it, small valve core under the force of a spring, realizes the non-return to fluid Effect.Check-valves belongs to automatic valve class, is mainly used on the pipeline of medium one-way flow, only medium is allowed to flow to a direction It is dynamic, to try to avert accidents.And the place that the present invention is different from conventional check valves is, is shunted, is had using four small valve cores Preferable stability.On the other hand, the present invention can drive big valve core to control aperture by electric operator, more accord with Close the automation control requirement of modern industry.
Realizing technical solution used by above-mentioned purpose is:
A kind of controllable angle-style check-valves of aperture, including valve body, sleeve, big valve core, sleeve upper cover, guide sleeve, valve deck, full spiral shell Line stud and nut, valve rod, seal assembly, clamp nut, bracket, to folder nut and electric operator;
The valve body is equipped with valve deck and is fixed by full thread stud and nut;Valve deck is equipped with bracket and passes through compression Nut is fixed, and bracket is equipped with electric operator;
The inlet and outlet intersection of the valve body is equipped with sleeve, and valve rod runs through bracket, valve deck, and reaches sleeve;Valve rod Seal assembly is equipped between valve deck;Guide sleeve is equipped between valve rod and sleeve upper cover;Described valve rod one end and electronic execution machine Structure is fixedly connected, and the other end is threadedly coupled with big valve core;Electric operator by valve rod drive big valve core along center line It moves up and down;
Circumferentially position is evenly arranged four groups of core assemblies in the sleeve, and every group of core assembly includes small valve core, key, bullet Spring and spool bracket;Spring is installed between small valve core and spool bracket, is additionally provided with key on small valve core, is fixed and is determined by key The endface position that position small valve core is contacted with big valve core.
The big valve core point three Duan Zucheng, by successively cone, cylindrical body and hemisphere from top to bottom;Prevent big valve core standard-sized sheet When state, small valve core aperture is excessive to cause its lower end surface to be detached from spool.The apex angle of cone is designed as 25~35 °, mainly considers When the maximum opening of big valve core, small valve core also can achieve maximum opening, at the same time, angle appropriate can satisfy big valve The power output of required electric operator is sufficiently small when core moves up and down.
Guide vane is provided in the entrance of the valve body, distance of circular arc of the guide vane at sleeve apart from valve rod axle center is 1.2~1.5 times of excircle of sleeve diameter;For water conservancy diversion, Anti-knocking, flow point in future is the lumen of two strands of importing valves.
The lumen diameter of the valve body is 1.5 times for importing and exporting diameter.
Sleeve upper cover and guide sleeve are interference fit, using hot cover process.
The sealing surface of the contact surface of the small valve core and big valve core, small valve core and sleeve carries out cure process.
The cure process is nitriding or pile-up welding hard alloy, to improve its wearability, to improve the controllable angle-style of aperture The service life of check-valves.
Check-valves working principle of the present invention:
With the movement of electric operator, valve rod drives big valve core to move up and down along the center line of valve rod.When big valve When core is located at least significant end, four small valve cores, which will be in, shuts state, and with the rising of big valve core, the end face of small valve core bottom It will appear one section of spacing between big valve core, here it is the maximum displacements that small valve core at this time can be opened.When big valve core is in complete When open state, in the case where incoming-flow pressure is sufficiently large, small valve core will also can achieve maximum opening, and as aperture is controllable at this time The full-gear of angle-style check-valves.
The beneficial effects of the present invention are:
(1) compared to the valve being mounted on straight pipe, the present invention can be directly installed on pipeline corner, reduce pipeline Number of ports.
(2) it is compared to traditional check-valves, the aperture that the present invention realizes check valve spool is adjustable, is more suitable for existing For fields such as industrial automation process controls.
(3) in the design phase, referring especially to the structure of existing angle type control valve, this to manufacture this valve the present invention When, it directly can directly be processed using sprays such as the valve body valve decks of angle-style sleeve adjusting valve, save die sinking expense, reduced Production cost, even for consumption inventory valve body valve deck spray play the role of it is positive.(4) of the present invention to open Spend controllable angle-style check-valves have it is easy to operate, it is easy for installation, it is safe and reliable the advantages that.
Detailed description of the invention
Fig. 1 is a kind of controllable angle-style check valve structure figure of aperture of the present invention.
Fig. 2 is a kind of Section A-A figure of the controllable angle-style check-valves of aperture of the present invention.
Fig. 3 is a kind of core assembly structure chart of the controllable angle-style check-valves of aperture of the present invention.
Fig. 4 is a kind of section B-B figure of the controllable angle-style check-valves of aperture of the present invention.
Fig. 5 is a kind of working principle diagram of the controllable angle-style check-valves of aperture of the present invention, a- small valve core closed state, the small valve of b- Core open state.
In figure: 1. valve bodies, 2. sleeves, 3. big valve cores, 4. sleeve upper covers, 5. guide sleeves, 6. valve decks, 7. full thread studs and Nut, 8. valve rods, 9. seal assemblies, 10. clamp nuts, 11. brackets, 12. pairs of folder nuts, 13. electric operators, 22. is small Spool, 23. keys, 24. springs, 25. spool brackets, 1a. guide vane.
Specific embodiment
Present invention will be further explained with reference to the attached drawings and specific examples, but protection scope of the present invention is simultaneously It is without being limited thereto.
Fig. 1, Fig. 3 are respectively that the present invention relates to a kind of controllable angle-style check-valves of aperture and the structure charts of each component, including valve Body 1, sleeve 2, big valve core 3, sleeve upper cover 4, guide sleeve 5, valve deck 6, full thread stud and nut 7, valve rod 8, seal assembly 9, Clamp nut 10, bracket 11, to folder nut 12 and electric operator 13;
Valve body 1 is equipped with valve deck 6 and is fixed by full thread stud and nut 7;Valve deck 6 is equipped with bracket 11 and passes through pressure Tight nut 10 is fixed, and bracket 11 is equipped with electric operator 13;
The inlet and outlet intersection of valve body 1 is equipped with sleeve 2, and valve rod 8 runs through bracket 11, valve deck 6, and reaches sleeve 2;Valve Seal assembly 9 is equipped between bar 8 and valve deck 6;Guide sleeve 5 is equipped between valve rod 8 and sleeve upper cover 4;Described 8 one end of valve rod and electricity Dynamic executing agency 13 is fixedly connected, and the other end is threadedly coupled with big valve core 3;Electric operator 13 drives big valve by valve rod 8 Core 3 along center line move up and down;
Circumferentially position is evenly arranged four groups of core assemblies in the sleeve 2, and every group of core assembly includes small valve core 22, key 23, spring 24 and spool bracket 25;Spring 24 is installed between small valve core 22 and spool bracket 25, is additionally provided with key on small valve core 22 23, the endface position that small valve core 22 is contacted with big valve core 3 is fixed and positioned by key 23.
The big valve core 3 divides three Duan Zucheng, by successively cone, cylindrical body and hemisphere, the apex angle of cone are from top to bottom 25~35 °.
Guide vane 1a is provided in the entrance of the valve body 1, circular arc of the guide vane 1a at sleeve 2 is apart from 8 axle center of valve rod Distance be 1.2~1.5 times of 2 outside diameter of sleeve.
The lumen diameter of the valve body 1 is 1.5 times for importing and exporting diameter.
Sleeve upper cover 4 and guide sleeve 5 are interference fit, using hot cover process.
The contact surface, small valve core 22 and the sealing surface of sleeve 2 of the small valve core 22 and big valve core 3 carry out cure process; The cure process is nitriding or pile-up welding hard alloy.
Assembling of the invention mainly divides three parts to carry out.It is the group of the assembling of sleeve assembly 2, whole valve portion respectively The assembling of dress and electric operator 13.
The first step, the assembling of core assembly:
As shown in figure 3, be first put into key 23 in the keyway of small valve core 22, then that small valve core 22 is placed on sleeve 2 is corresponding At window, it is sequentially placed into spring 24 and spool bracket 25 later and makes to be screwed (as shown in Figure 4).Pacify in this approach again Install other three small valve cores 22.Big valve core 3 and valve rod 8 are combined, by big valve core 3 from sleeve 2 from top to bottom from center Hole passes through and is placed on the centre of four small valve cores 22.Using hot cover process, guide sleeve 5 is fixed in sleeve upper cover 4.It will set Cylinder upper cover 4 is penetrated from the upper end of valve rod 8, until the central hole of sleeve 2, is threadably secured.It is machined in sleeve upper cover 4 small Screw thread is conveniently tightened in hole.
After core assembly is installed, four small valve cores (22) are in close state.
Second step is the assembling of whole valve portion:
First gasket ring is put into the slot of 1 lumen of valve body, is put into before assembled sleeve 2 and tightened.Respectively in valve Gasket ring is placed into slot in the top flange of body 1 and in the slot of 2 upper end of sleeve.By valve deck 6 from 8 upper end of valve rod penetrate up to The top flange of valve body 1 is bonded, and fixed using full thread stud and nut 7.
Later, seal assembly 9 is put into the packing cavity on 7 top of valve deck as shown in Figure 5 and is fixed.
Third step is the assembling of electric operator 13:
It is put into valve deck upper end after electric operator 13 is connect with bracket 11, is fixed using clamp nut 10.It is logical It crosses and folder nut 12 is connected valve rod 8 and electric operator 13.Until this step, of the invention is completed, such as Fig. 1 It is shown.
Working principle are as follows:
Big valve core 3 is controlled by electric operator 13 to move up and down with valve rod 8 along the center line of valve rod 8.
The position of big valve core 3 decides the practical maximum opening of small valve core 22, when big valve core 3 is located at the position of least significant end When, the maximum opening of small valve core 22 is zero, that is to say, that valve at this time is in close state.When big valve core 3 rises, with Occurs gap between small valve core 22, the maximum opening of small valve core 22 at this time is not zero.Small valve core is acted on when entrance fluid When power on 22 is not more than the active force of spring 24, small valve core 22 is still in closed state (as shown in Figure 5 a), that is to say, that Valve at this time is in close state.When the power of entrance fluid acted on small valve core 22 is greater than the active force of spring 24, Small valve core 22 opens (as shown in Figure 5 b), that is to say, that valve at this time is in the open state.
To prevent incoming flow from damaging to the impact of small valve core 22 to it, the guide vane for shunting is provided in entrance The cross section of 1a, guide vane are as shown in Figure 2.This is it is also ensured that the pressure that each small valve core 22 can be balanced more.
When whole valve is in the open state, to closure valve, it is only necessary to 13 dropping signal of electric operator is given, Big valve core 3 can drop to low side therewith, meanwhile, the conical surface of big valve core 3 can force small valve core 22 along vertical with center spool line Straight line it is mobile towards sealing surface, until be bonded with the sealing surface on sleeve 21, valve closing.
Protection scope of the present invention is not limited to the above embodiments, also comprising within the scope of present inventive concept other embodiments and Variation.

Claims (7)

1. a kind of controllable angle-style check-valves of aperture, which is characterized in that including on valve body (1), sleeve (2), big valve core (3), sleeve Cover (4), guide sleeve (5), valve deck (6), full thread stud and nut (7), valve rod (8), seal assembly (9), clamp nut (10), Bracket (11), to folder nut (12) and electric operator (13);
The valve body (1) is equipped with valve deck (6) and fixed by full thread stud and nut (7);Valve deck (6) is equipped with bracket (11) and fixed by clamp nut (10), bracket (11) is equipped with electric operator (13);
The inlet and outlet intersection of the valve body (1) is equipped with sleeve (2), and valve rod (8) runs through bracket (11), valve deck (6), and reaches To sleeve (2);Seal assembly (9) are equipped between valve rod (8) and valve deck (6);It is equipped with and leads between valve rod (8) and sleeve upper cover (4) To set (5);Described valve rod (8) one end is fixedly connected with electric operator (13), and the other end is threadedly coupled with big valve core (3); Electric operator (13) by valve rod (8) drive big valve core (3) along center line move up and down;
Circumferentially position is evenly arranged four groups of core assemblies in the sleeve (2), and every group of core assembly includes small valve core (22), key (23), spring (24) and spool bracket (25);Spring (24), small valve core are installed between small valve core (22) and spool bracket (25) (22) it is additionally provided with key (23) on, fixes and position the endface position that small valve core (22) is contacted with big valve core (3) by key (23).
2. a kind of controllable angle-style check-valves of aperture as described in claim 1, which is characterized in that three sections of the big valve core (3) point Composition, by successively cone, cylindrical body and hemisphere, the apex angle of cone are 25~35 ° from top to bottom.
3. a kind of controllable angle-style check-valves of aperture as described in claim 1, which is characterized in that the entrance of the valve body (1) In be provided with guide vane (1a), distance of circular arc of the guide vane (1a) at sleeve (2) apart from valve rod (8) axle center be sleeve (2) outside 1.2~1.5 times of circular diameter.
4. a kind of controllable angle-style check-valves of aperture as described in claim 1, which is characterized in that the lumen of the valve body (1) is straight Diameter is 1.5 times for importing and exporting diameter.
5. a kind of controllable angle-style check-valves of aperture as described in claim 1, which is characterized in that sleeve upper cover (4) and guide sleeve It (5) is interference fit, using hot cover process.
6. a kind of controllable angle-style check-valves of aperture as described in claim 1, which is characterized in that the small valve core (22) and big valve Contact surface, small valve core (22) and the sealing surface of sleeve (2) of core (3) carry out cure process.
7. a kind of controllable angle-style check-valves of aperture as claimed in claim 6, which is characterized in that the cure process be nitriding or Pile-up welding hard alloy.
CN201810229781.XA 2018-03-20 2018-03-20 A kind of controllable angle-style check-valves of aperture Active CN108547982B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810229781.XA CN108547982B (en) 2018-03-20 2018-03-20 A kind of controllable angle-style check-valves of aperture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810229781.XA CN108547982B (en) 2018-03-20 2018-03-20 A kind of controllable angle-style check-valves of aperture

Publications (2)

Publication Number Publication Date
CN108547982A CN108547982A (en) 2018-09-18
CN108547982B true CN108547982B (en) 2019-10-01

Family

ID=63516770

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810229781.XA Active CN108547982B (en) 2018-03-20 2018-03-20 A kind of controllable angle-style check-valves of aperture

Country Status (1)

Country Link
CN (1) CN108547982B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110030389B (en) * 2019-05-06 2023-10-27 西南石油大学 Cage sleeve type throttle valve

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2177144Y (en) * 1993-12-25 1994-09-14 曾祥炜 Shuttle type adjusting valve
CN1752498A (en) * 2005-10-14 2006-03-29 中国人民解放军总后勤部油料研究所 Pressure reducing valve and method thereof
CN103032580A (en) * 2012-12-27 2013-04-10 吴忠中创自控阀有限公司 Multi-stage throttling regulation valve
CN206221790U (en) * 2016-11-25 2017-06-06 南通龙源电站阀门有限公司 A kind of labyrinth type antiscour regulating valve

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005325893A (en) * 2004-05-13 2005-11-24 Fujikin Inc Controller
CN206129406U (en) * 2013-07-15 2017-04-26 阿奎利特瑞匹帝申公司 Flow divider system and have its automobile engine and car

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2177144Y (en) * 1993-12-25 1994-09-14 曾祥炜 Shuttle type adjusting valve
CN1752498A (en) * 2005-10-14 2006-03-29 中国人民解放军总后勤部油料研究所 Pressure reducing valve and method thereof
CN103032580A (en) * 2012-12-27 2013-04-10 吴忠中创自控阀有限公司 Multi-stage throttling regulation valve
CN206221790U (en) * 2016-11-25 2017-06-06 南通龙源电站阀门有限公司 A kind of labyrinth type antiscour regulating valve

Also Published As

Publication number Publication date
CN108547982A (en) 2018-09-18

Similar Documents

Publication Publication Date Title
CN201284835Y (en) Double-valve core balancing type large diameter supercritical parameter break valve
CN203272878U (en) Integral dual-electric control three-position cross joint medium-pressure solenoid valve
CN108105420A (en) A kind of high-pressure hydraulic pump discharge control valve
CN108547982B (en) A kind of controllable angle-style check-valves of aperture
CN107061834A (en) Built-in driving axial flow control valve
CN103821979A (en) Multistage depressurization valve
CN205715983U (en) Double axis of guide flow type regulating valves
CN203431207U (en) Bidirectional balancing program control valve
CN102434527A (en) Hydraulic cylinder
CN103836237B (en) Fusiformis is adjustable non-return valve
CN211649204U (en) Self-operated regulating valve
CN203431210U (en) Bidirectional balancing type stop valve
CN203743551U (en) Multistage pressure reducing valve
CN205078814U (en) Poor guide's balanced type governing valve of silence high pressure
CN203770773U (en) Pressure regulating valve
CN206626241U (en) Built-in driving axial flow control valve
CN207080604U (en) One kind seals noiseless magnetic valve
CN202451900U (en) Right-angle quick closing check valve
CN209925671U (en) Floating upper-mounted ball valve
CN203162256U (en) Integrated type vertical type check valve
CN102619800A (en) Pure water piezoelectric ceramic driving switching valve
CN201916566U (en) Large-bore medium-pressure regulating valve structure
CN205479395U (en) A check valve subassembly for in sludge pump
CN206988448U (en) A kind of double spool linkage valve
CN201650708U (en) Semi-balanced type clean water valve

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant