CN108223473A - A kind of one way sequence valve - Google Patents

A kind of one way sequence valve Download PDF

Info

Publication number
CN108223473A
CN108223473A CN201810046460.6A CN201810046460A CN108223473A CN 108223473 A CN108223473 A CN 108223473A CN 201810046460 A CN201810046460 A CN 201810046460A CN 108223473 A CN108223473 A CN 108223473A
Authority
CN
China
Prior art keywords
valve
hydraulic fluid
fluid port
steel ball
pressure
Prior art date
Application number
CN201810046460.6A
Other languages
Chinese (zh)
Other versions
CN108223473B (en
Inventor
邵立坤
Original Assignee
邵立坤
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 邵立坤 filed Critical 邵立坤
Priority to CN201810046460.6A priority Critical patent/CN108223473B/en
Publication of CN108223473A publication Critical patent/CN108223473A/en
Application granted granted Critical
Publication of CN108223473B publication Critical patent/CN108223473B/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/021Valves for interconnecting the fluid chambers of an actuator
    • 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
    • F16K1/14Lift 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 with ball-shaped valve member
    • 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
    • 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
    • F16K17/00Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0406Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded in the form of balls

Abstract

The invention discloses a kind of one way sequence valves, include valve body, and valve body is equipped with hydraulic fluid port A and hydraulic fluid port B, and valve body inner bore is formed with distance piece between hydraulic fluid port A and hydraulic fluid port B, and valve body right sidewall is equipped with link slot;Catch, fixation are located in the card slot on the left of the valve body inner bore;Steel ball is slidably arranged in valve body inner bore, it is against on catch when steel ball is located at left limit, and hydraulic fluid port A is connected with hydraulic fluid port B, hydraulic fluid port A and hydraulic fluid port B partitions when steel ball is located at the valve body distance piece;Pressure control assembly, is located at the right side of valve body, and pressure control assembly is arranged to:When the pressure of hydraulic fluid port A, which acts on, to be not enough to overcome the active force of the pressure control assembly on the steel ball, steel ball is located at the distance piece of valve body;When the pressure of hydraulic fluid port A, which pushes steel ball that the active force of pressure control assembly is overcome to slide to the right, is detached from the valve body distance piece, hydraulic fluid port A is connected with hydraulic fluid port B.It the advantage is that:Integrate check valve and sequence valve, rational in infrastructure, compact, flow resistance is small.

Description

A kind of one way sequence valve

Technical field

The present invention relates to hydraulic valve manufacturing technology field, a kind of especially one way sequence valve.

Background technology

Common one way sequence valve is composed in parallel by check valve and sequence valve in hydraulic drive, check valve therein and suitable Sequence valve is respectively independent.When fluid forward direction by when, closed check valve, sequence valve work.When fluid back through when, fluid is through list It is passed freely through to valve, sequence valve does not work.There are following technological deficiencies for existing this one way sequence valve:Occupied space is relatively Greatly, due to the limitation in space, the oil filling capacity of check valve and sequence valve is smaller, it is difficult to meet the need of big oil filling capacity equipment It asks.

Invention content

The technical problem to be solved by the invention for the present situation of prior art is to provide simple and reasonable for structure, costs It is low, volume compact, a kind of through-flow big one way sequence valve.

Technical solution is used by the present invention solves above-mentioned technical problem:

A kind of one way sequence valve, including:

Valve body is equipped with screw thread at the major diameter of middle part, be equipped at the path of the valve body both ends hydraulic fluid port A that is communicated with its endoporus and Hydraulic fluid port B, the valve body inner bore are formed with distance piece between hydraulic fluid port A and hydraulic fluid port B, and the valve body right sidewall is equipped with connection Slot;

Catch, fixation are located in the card slot on the left of the valve body inner bore;

Steel ball is slidably arranged in the valve body inner bore, it is against on the catch when steel ball is located at left limit, The hydraulic fluid port A is connected with hydraulic fluid port B, hydraulic fluid port A and hydraulic fluid port B partitions when the steel ball is located at the valve body distance piece;

Pressure control assembly, is located at the right side of the valve body, and the pressure control assembly is arranged to:When the pressure of hydraulic fluid port A Power acts on when being not enough to overcome the active force of the pressure control assembly on the steel ball, and the steel ball is located at the valve body Distance piece;The valve body is detached from when the pressure of the hydraulic fluid port A pushes steel ball that the active force of pressure control assembly is overcome to slide to the right During distance piece, the hydraulic fluid port A is connected with hydraulic fluid port B.

In one embodiment, the pressure control assembly includes:First pressure component and second pressure component, it is described First pressure component is located in the endoporus on the right side of the valve body and is matched with the steel ball, and the second pressure component is set in On periphery on the right side of the valve body, it is connected between the first pressure component and second pressure component by straight pin;It is described Straight pin pass through the valve body link slot be connected with first pressure component, the straight pin be located at link slot exterior section and Second pressure component is connected, and the straight pin can drive first pressure component and second pressure component along described link slot or so It slides.By the setting of first pressure component and second pressure component, it can ensure pressure control assembly under smaller volume Reach larger setting pressure.

In one embodiment, the first pressure component includes the first spring base and the first spring, first bullet Spring abutment be equipped with the matched endoporus of steel ball, connecting hole is offered on the first spring base side wall, the straight pin is inserted into institute It states in connecting hole and forms a fixed connection with first spring base, first spring one end is against the outer of first spring base At Zhou Taijie, the other end is against the valve body inner bore bottom.

In one embodiment, the second pressure component include second spring seat, second spring, third spring base and Baffle ring, the second spring seat, which is located at, to be against on the left of hydraulic fluid port B sides, the second spring seat on the straight pin, described Third spring base is located remotely from the side of hydraulic fluid port B, is against on the baffle ring on the right side of the third spring base, the second spring is set Between the second spring seat and third spring base.

In one embodiment, the hydraulic fluid port A and hydraulic fluid port B is all to be obliquely installed.

Compared with prior art, the advantage of the invention is that:

The one way sequence valve of the present invention, integrates check valve and sequence valve, rational in infrastructure, compact, by setting steel Ball horizontally slips along valve body inner bore, and when hydraulic fluid port B oil inlets, fluid pushes steel ball to be against on the catch of left side, and hydraulic fluid port B and hydraulic fluid port A are direct Conducting;When hydraulic fluid port A oil inlets, if hydraulic fluid port A insufficient pressures are to push steel ball to overcome the active force of pressure control assembly, steel ball Distance piece between hydraulic fluid port A and hydraulic fluid port B, hydraulic fluid port A and hydraulic fluid port B partitions are obstructed, and the pressure of only hydraulic fluid port A is enough to overcome pressure The active force of control assembly can just push steel ball and slide disengaging distance piece to the right, and hydraulic fluid port A and hydraulic fluid port B is connected.Present invention processing Simply, part is few, realizes the function of check valve and sequence valve by being used as the steel ball of standard component, can greatly reduce cost.

Description of the drawings

Fig. 1 is the structure diagram of the present invention;

Fig. 2 is structure diagram when steel ball is located at left limit in the present invention;

Fig. 3 is structure diagram when steel ball is located at distance piece in the present invention;

Fig. 4 is structure diagram when steel ball is located at right limit in the present invention.

Specific embodiment

The present invention is described in further detail below in conjunction with attached drawing embodiment.

Structure diagram for the present invention as shown in Figure 1,

A kind of one way sequence valve includes valve body 2, screw thread 21 is equipped at the major diameter of middle part, is equipped at 2 both ends path of valve body The hydraulic fluid port A and hydraulic fluid port B communicated with its endoporus, 2 endoporus of valve body are formed with distance piece 22, the valve body between hydraulic fluid port A and hydraulic fluid port B 2 right sidewalls are equipped with link slot 23;Catch 1, fixation are located in the card slot on the left of 2 endoporus of valve body;Steel ball 3 is slided Dynamic to be arranged in the endoporus of valve body 2, it is against on the catch 1 when steel ball 3 is located at left limit, and hydraulic fluid port A is connected with hydraulic fluid port B, Hydraulic fluid port A and hydraulic fluid port B partitions when steel ball 3 is located at valve body distance piece 22;Pressure control assembly 4 is located at the right side of valve body 2, pressure Control assembly 4 is arranged to:When the pressure of hydraulic fluid port A acts on 3 steel balls the active force for being not enough to overcome the pressure control assembly 4 When, steel ball 3 is located at the distance piece 22 of the valve body;When the pressure of the hydraulic fluid port A pushes steel ball 3 to overcome pressure control assembly 4 Active force slide to the right be detached from the valve body distance piece 22 when, the hydraulic fluid port A is connected with hydraulic fluid port B.

In one embodiment, pressure control assembly 4 includes:First pressure component and second pressure component, first pressure Component is located in the endoporus on 2 right side of valve body and is matched with steel ball 3, and second pressure component is set in the outer of 2 right side of valve body Zhou Shang is connected between first pressure component and second pressure component by straight pin 41;Straight pin 41 passes through the valve body Link slot 23 is connected with first pressure component, and straight pin 41 is located at 23 exterior section of link slot and is connected with second pressure component It connects, straight pin 41 can drive first pressure component and second pressure component to horizontally slip along link slot 23.

In one embodiment, first pressure component includes the first spring base 43 and the first spring 44, the first spring base 43 Equipped with 3 matched endoporus of steel ball, offer connecting hole on 43 side wall of the first spring base, straight pin 41 is inserted into the connecting hole In form a fixed connection with the first spring base 43,44 one end of the first spring is against at the periphery step of the first spring base 43, another End is against the bottom of 2 endoporus of valve body.

In one embodiment, second pressure component includes second spring seat 42, second spring 45,46 and of third spring base Baffle ring 47, second spring seat 42 are located at close to hydraulic fluid port B sides, and 42 left side of second spring seat is against on straight pin 41, third Spring base 46 is located remotely from the side of hydraulic fluid port B, and 46 right side of third spring base is against on baffle ring 47, and second spring 45 is set on the second bullet Between spring abutment 42 and third spring base 46.

In one embodiment, hydraulic fluid port A and hydraulic fluid port B is all to be obliquely installed.

The operation principle of the present invention is as follows:

This one way sequence valve integrates check valve and sequence valve, compact-sized, the external screw thread set by 2 outside of valve body Valve is bolted in installation position.

One-way flow state:As shown in Fig. 2, fluid is flowed by hydraulic fluid port B, fluid shifts steel ball 3 onto left limit and is against catch 1 On, hydraulic fluid port B is connected with hydraulic fluid port A, and flow area is big, and flow resistance is small.

Sequence blocks state:As shown in figure 3, fluid enters from hydraulic fluid port A, hydraulic fluid port A insufficient pressures are to overcome pressure control group Steel ball 3 is shifted onto at distance piece 22 during the active force of part 4,3 diameter of steel ball is formed with interstitial fluid sealing with 2 endoporus of valve body, will be oily Mouth A and hydraulic fluid port B partitions, hydraulic fluid port A and hydraulic fluid port B are obstructed.

Sequential communication state:As shown in figure 4, fluid is flowed into from hydraulic fluid port A, when the pressure of hydraulic fluid port A is enough to overcome pressure control During the active force of component 4, the pressure of hydraulic fluid port A pushes steel ball 3 to withstand on the first spring base 43 and drives the second bullet by straight pin 41 Spring abutment 42 overcomes the active force of the first spring 44 and second spring 45 to move right, until 2 endoporus of the first spring base 43 and valve body Bottom offsets, and steel ball 3 is detached from distance piece 22, and fluid flows into hydraulic fluid port B by hydraulic fluid port A.

Highly preferred embodiment of the present invention has illustrated, and the various change or remodeling made by those of ordinary skill in the art are not It can depart from the scope of the present invention.

Claims (5)

1. a kind of one way sequence valve, which is characterized in that including:
Valve body is equipped with screw thread at the major diameter of middle part, the hydraulic fluid port A and hydraulic fluid port communicated with its endoporus is equipped at the path of the valve body both ends B, the valve body inner bore are formed with distance piece between hydraulic fluid port A and hydraulic fluid port B, and the valve body right sidewall is equipped with link slot;
Catch, fixation are located in the card slot on the left of the valve body inner bore;
Steel ball is slidably arranged in the valve body inner bore, it is against on the catch when steel ball is located at left limit, described Hydraulic fluid port A is connected with hydraulic fluid port B, hydraulic fluid port A and hydraulic fluid port B partitions when the steel ball is located at the valve body distance piece;
Pressure control assembly, is located at the right side of the valve body, and the pressure control assembly is arranged to:When the pressure of hydraulic fluid port A is made With when being not enough to overcome the active force of the pressure control assembly on the steel ball, the steel ball is located at the isolation of the valve body Section;The valve body isolation is detached from when the pressure of the hydraulic fluid port A pushes steel ball that the active force of pressure control assembly is overcome to slide to the right Duan Shi, the hydraulic fluid port A are connected with hydraulic fluid port B.
2. a kind of one way sequence valve according to claim 1, which is characterized in that the pressure control assembly includes:First Pressure assembly and second pressure component, the first pressure component be located in the endoporus on the right side of the valve body and with the steel ball phase Cooperation, the second pressure component are set on the periphery on the right side of the valve body, the first pressure component and second pressure group It is connected between part by straight pin;The straight pin passes through the link slot of the valve body to be connected with first pressure component, institute State straight pin and be located at link slot exterior section and be connected with second pressure component, the straight pin can drive first pressure component and Second pressure component horizontally slips along the link slot.
3. a kind of one way sequence valve according to claim 2, which is characterized in that the first pressure component includes the first bullet Spring abutment and the first spring, first spring base be equipped with the matched endoporus of steel ball, open up on the first spring base side wall There is connecting hole, the straight pin is inserted into the connecting hole and forms a fixed connection with first spring base, first spring One end is against at the periphery step of first spring base, and the other end is against the valve body inner bore bottom.
4. a kind of one way sequence valve according to claim 2, which is characterized in that the second pressure component includes the second bullet Spring abutment, second spring, third spring base and baffle ring, the second spring seat are located at close to hydraulic fluid port B sides, the second spring seat Left side is against on the straight pin, and the third spring base is located remotely from the side of hydraulic fluid port B, is against on the right side of the third spring base On the baffle ring, the second spring is set between the second spring seat and third spring base.
5. a kind of one way sequence valve according to claim 1, which is characterized in that the hydraulic fluid port A and hydraulic fluid port B is all that inclination is set It puts.
CN201810046460.6A 2018-01-17 2018-01-17 One-way sequence valve CN108223473B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810046460.6A CN108223473B (en) 2018-01-17 2018-01-17 One-way sequence valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810046460.6A CN108223473B (en) 2018-01-17 2018-01-17 One-way sequence valve

Publications (2)

Publication Number Publication Date
CN108223473A true CN108223473A (en) 2018-06-29
CN108223473B CN108223473B (en) 2020-05-08

Family

ID=62667286

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810046460.6A CN108223473B (en) 2018-01-17 2018-01-17 One-way sequence valve

Country Status (1)

Country Link
CN (1) CN108223473B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108131479A (en) * 2017-12-21 2018-06-08 宁波文泽机电技术开发有限公司 A kind of one-way throttle valve
CN108758041A (en) * 2018-08-28 2018-11-06 东莞海特帕沃液压科技有限公司 A kind of No leakage one way sequence valve
CN109469659A (en) * 2018-11-24 2019-03-15 李军 A kind of one way sequence valve

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55135274A (en) * 1979-04-09 1980-10-21 Ckd Corp Sequence valve
CN87212352U (en) * 1987-10-07 1988-04-20 陈延全 Electric-control one-way valve
CN1033536A (en) * 1987-12-13 1989-06-28 陈延全 Electric control one-way valve
CN201373144Y (en) * 2009-01-06 2009-12-30 费斯托(中国)有限公司 One-way valve
CN102563140A (en) * 2012-01-02 2012-07-11 林友根 Pilot-operated one-way sequence valve
CN102563141A (en) * 2012-01-02 2012-07-11 林友根 Direct-acting internally piloted one-way sequence valve
CN202612761U (en) * 2012-01-02 2012-12-19 林友根 Direct-acting type internal-control unidirectional sequence valve
CN203272891U (en) * 2013-05-10 2013-11-06 浙江工商职业技术学院 Simple single-way valve
CN103883767A (en) * 2014-04-22 2014-06-25 张筱秋 Flange joint two-plate flow guide zinc alloy perpendicular one-way valve
CN104632745A (en) * 2015-02-11 2015-05-20 华侨大学 Sequence valve with magneto-rheological pilot valve
CN106015148A (en) * 2016-08-04 2016-10-12 王才丰 Positive-and-negative pressure driving device for mounting tool of cold shrinking cable sealing cap
CN106151607A (en) * 2016-08-02 2016-11-23 陈艳艳 Threaded check valve
CN206129759U (en) * 2015-11-30 2017-04-26 赵义 Pincers hydro -cylinder acceleration valve is smashed to hydraulic pressure

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55135274A (en) * 1979-04-09 1980-10-21 Ckd Corp Sequence valve
CN87212352U (en) * 1987-10-07 1988-04-20 陈延全 Electric-control one-way valve
CN1033536A (en) * 1987-12-13 1989-06-28 陈延全 Electric control one-way valve
CN201373144Y (en) * 2009-01-06 2009-12-30 费斯托(中国)有限公司 One-way valve
CN102563140A (en) * 2012-01-02 2012-07-11 林友根 Pilot-operated one-way sequence valve
CN102563141A (en) * 2012-01-02 2012-07-11 林友根 Direct-acting internally piloted one-way sequence valve
CN202612761U (en) * 2012-01-02 2012-12-19 林友根 Direct-acting type internal-control unidirectional sequence valve
CN203272891U (en) * 2013-05-10 2013-11-06 浙江工商职业技术学院 Simple single-way valve
CN103883767A (en) * 2014-04-22 2014-06-25 张筱秋 Flange joint two-plate flow guide zinc alloy perpendicular one-way valve
CN104632745A (en) * 2015-02-11 2015-05-20 华侨大学 Sequence valve with magneto-rheological pilot valve
CN206129759U (en) * 2015-11-30 2017-04-26 赵义 Pincers hydro -cylinder acceleration valve is smashed to hydraulic pressure
CN106151607A (en) * 2016-08-02 2016-11-23 陈艳艳 Threaded check valve
CN106015148A (en) * 2016-08-04 2016-10-12 王才丰 Positive-and-negative pressure driving device for mounting tool of cold shrinking cable sealing cap

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108131479A (en) * 2017-12-21 2018-06-08 宁波文泽机电技术开发有限公司 A kind of one-way throttle valve
CN108131479B (en) * 2017-12-21 2019-05-28 绍兴市雅克汽配有限公司 A kind of one-way throttle valve
CN108758041A (en) * 2018-08-28 2018-11-06 东莞海特帕沃液压科技有限公司 A kind of No leakage one way sequence valve
CN109469659A (en) * 2018-11-24 2019-03-15 李军 A kind of one way sequence valve
CN109469659B (en) * 2018-11-24 2020-05-08 玉环鸿创阀门有限公司 One-way sequence valve

Also Published As

Publication number Publication date
CN108223473B (en) 2020-05-08

Similar Documents

Publication Publication Date Title
JP5260698B2 (en) Internal combustion engine with switching valve
CN105073530B (en) The brake of braking system for vehicle and braking system for vehicle
CN102301300B (en) Proportional Pressure Control Valve
US2267284A (en) By-pass valve
US4583711A (en) Rigid mount coupler with flow check stop
US2599935A (en) Hydraulic line coupling
KR20120099035A (en) Device for releasing, in a pulsed manner, an amount of fluid that can be stored in an accumulator housing
WO2009067485A3 (en) Circulation sub with indexing mechanism
JP4768851B2 (en) Valve lubricator
CN102168753A (en) Transmission hydraulic control system having a pump bypass valve
CN102481689B (en) Hydraulic press unit
WO2014022266A1 (en) Integral multiple stage safety valves
MY164386A (en) Flow stop valve and method
CN101228385B (en) Actuating device for a rapid coupling
US8286700B1 (en) Damping and sealing device for a well pipe having an inner flow passage and method of using thereof
CN102859248A (en) Damping arrangement
CN106458179B (en) The hydraulic block of the hydraulic assembly of anti-slip regulation system for hydraulic vehicle brake equipment
CN103603975B (en) Multistage hydraulic cylinder
EP2290273A3 (en) Multi-way selector valve
US2781775A (en) Limited capacity check valve
CN101473284A (en) Fluid-controlled valve
US8205690B2 (en) Dual acting locking jar
ES2319425T3 (en) Coaxial coupling.
CA2616137A1 (en) A shoe for wellbore lining tubing
US3653405A (en) Fluid line coupler

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
TA01 Transfer of patent application right
TA01 Transfer of patent application right

Effective date of registration: 20200410

Address after: 317609 pile head, Longxi Town, Yuhuan City, Taizhou City, Zhejiang Province

Applicant after: Yuhuan hongchuang Valve Co., Ltd

Address before: 315000 No. 510 Chuangyuan Road, Ningbo National High-tech Zone, Zhejiang Province

Applicant before: Shao Likun

GR01 Patent grant
GR01 Patent grant