CN109282045A - A kind of electromagnetic valve device - Google Patents

A kind of electromagnetic valve device Download PDF

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Publication number
CN109282045A
CN109282045A CN201811274412.9A CN201811274412A CN109282045A CN 109282045 A CN109282045 A CN 109282045A CN 201811274412 A CN201811274412 A CN 201811274412A CN 109282045 A CN109282045 A CN 109282045A
Authority
CN
China
Prior art keywords
accommodating chamber
connecting portion
wall
valve body
electromagnetic valve
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.)
Pending
Application number
CN201811274412.9A
Other languages
Chinese (zh)
Inventor
黄立伟
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.)
Asco Valve Shanghai Co Ltd
Original Assignee
Aventics Pneumatics Equipment Changzhou Co Ltd
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 Aventics Pneumatics Equipment Changzhou Co Ltd filed Critical Aventics Pneumatics Equipment Changzhou Co Ltd
Priority to CN201811274412.9A priority Critical patent/CN109282045A/en
Publication of CN109282045A publication Critical patent/CN109282045A/en
Pending legal-status Critical Current

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
    • 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
    • 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
    • F16K27/00Construction of housing; Use of materials therefor
    • F16K27/02Construction of housing; Use of materials therefor of lift valves
    • F16K27/029Electromagnetically actuated valves

Abstract

A kind of electromagnetic valve device is related to manufacturing control field.Electromagnetic valve device include valve body in a rectangular parallelepiped shape, be arranged in valve body antetheca front mounting plate, fixed plate of the front mounting plate far from valve body side is set, solenoid valve of the fixed plate far from valve body side and the core assembly through front mounting plate and valve body are set, gas outlet is provided on solenoid valve, stomata is offered in fixed plate, core assembly is connected to by stomata with gas outlet;Core assembly includes successively end to end piston, main valve plug, the rebasing seat of primary seal and rear end cap that longitudinal section is native font, and the volute spring being set on main valve plug, one end connection of piston and stomata.It is the balanced type main valve plug of native font by using the longitudinal section of big at both ends and small in middle to above-mentioned electromagnetic valve device, realizes that main valve plug both ends stress is identical, and keep balance by volute spring.

Description

A kind of electromagnetic valve device
Technical field
The present invention relates to manufacture control fields, in particular to a kind of electromagnetic valve device.
Background technique
Electromagnetic valve device is one of common component of control field, and important component is spool.Have one in the market The common unbalanced spool of kind, above-mentioned main valve plug consist of two parts, and a part is cylinder, and another part is cake Shape, longitudinal section are T-type.The diameter of cake is greater than the diameter of cylinder, and the two axle center is overlapped.The spool of such unbalanced Dynamic balance is realized by difference in areas, the big pressure of area is small, thus occupied space is bigger in valve body, can not realize compact Change design, it is big to further result in dead volume.
Summary of the invention
The purpose of the present invention is to provide a kind of electromagnetic valve device, the longitudinal section by using big at both ends and small in middle is soil The balanced type main valve plug of font realizes that main valve plug both ends stress is identical, and keeps balancing by volute spring.
The embodiment of the present invention is achieved in that
A kind of electromagnetic valve device comprising valve body in a rectangular parallelepiped shape, be arranged in valve body antetheca front mounting plate, Fixed plate of the front mounting plate far from valve body side is set, solenoid valve of the fixed plate far from valve body side is set and is passed through The core assembly of front mounting plate and valve body is worn, gas outlet is provided on solenoid valve, offers stomata in fixed plate, stomata is by valve Core assembly is connected to gas outlet;Core assembly includes successively end to end piston, longitudinal section is native font main valve plug, master are close One end of packing pedestal and rear end cap, and the volute spring being set on main valve plug, piston and stomata connects.
In preferred embodiments of the present invention, above-mentioned main valve plug includes successively end to end first connecting portion, central axis And second connecting portion, the diameter of first connecting portion and second connecting portion are all larger than the diameter of central axis, on the outside of centrally disposed axis Volute spring small end and first connecting portion contradict, the rebasing seat of primary seal is wrapped on the outside of second connecting portion.
In preferred embodiments of the present invention, the first accommodating chamber, first connecting portion setting are offered in above-mentioned front mounting plate In the first accommodating chamber, the first retention bead is provided in the first accommodating chamber, the first retention bead has the first inclined-plane, and first tiltedly Face and the outside of volute spring cooperate.
In preferred embodiments of the present invention, the second accommodating chamber for accommodating core assembly is offered in above-mentioned valve body, the Be provided with the second retention bead in two accommodating chambers, the inner wall of the second retention bead and the second accommodating chamber forms groove, groove it is interior Wall includes the second inclined-plane, and one end of volute spring is arranged in a groove, the fit inside on the second inclined-plane and volute spring.
In preferred embodiments of the present invention, it is provided between above-mentioned second connecting portion and the contact surface of the rebasing seat of primary seal Primary seal pad.
In preferred embodiments of the present invention, between above-mentioned piston and the inner wall of the first accommodating chamber, first connecting portion and Sealing ring, and the outer wall of piston, are provided between the inner wall of one accommodating chamber and between the rebasing seat of primary seal and rear end cap The seal groove for placing sealing ring is provided on the inner wall of one accommodating chamber and the inner wall of rear end cap.
Gap and/or rear end in preferred embodiments of the present invention, between above-mentioned first accommodating chamber and first connecting portion Gap setting between lid and the rebasing seat of primary seal has guiding wear ring, and sets on rear end cap and/or the inner wall of the first accommodating chamber It is equipped with wear-resistant trough.
The beneficial effect of the embodiment of the present invention is: a kind of electromagnetic valve device, by the traditional main valve for by longitudinal section being T shape Core is changed to the balanced type main valve plug that longitudinal section is native font, and it is identical to realize main valve plug both ends stress.Also, by above-mentioned master It is arranged volute spring on the outside of spool and keeps balance.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural schematic diagram of electromagnetic valve device of the embodiment of the present invention;
Fig. 2 is another structural schematic diagram of electromagnetic valve device of the embodiment of the present invention;
Fig. 3 is the A-A the schematic diagram of the section structure of Fig. 2;
Fig. 4 is the main valve plug of electromagnetic valve device of the embodiment of the present invention and the structural schematic diagram of volute spring;
Fig. 5 is the enlarged drawing in Fig. 3 at B;
Fig. 6 is the schematic diagram of the section structure of traditional main valve plug.
Icon: 100- electromagnetic valve device;110- valve body;120- front mounting plate;130- fixed plate;140- solenoid valve; 150- core assembly;The gas outlet 141-;131- stomata;151- piston;152- main valve plug;The rebasing seat of 153- primary seal;After 154- End cap;155- volute spring;156- first connecting portion;157- central axis;158- second connecting portion;The first accommodating chamber of 132-; The second accommodating chamber of 111-;161- small end;162- big end;The first retention bead of 133-;The first inclined-plane 134-;The second limit convex of 112- It rises;113- groove;The second inclined-plane 114-;163- primary seal pad;164- sealing ring;165- seal groove;166- is oriented to wear ring; 167- wear-resistant trough.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that the orientation of the instructions such as term " center ", "upper", "inner", "outside" or Positional relationship be based on the orientation or positional relationship shown in the drawings or the invention product using when the orientation usually put or Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.In addition, art Language " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
In addition, the terms such as term "vertical" are not offered as requiring component abswolute level or pendency, but can be slightly tilted. It is not to indicate that the structure is had to fully horizontally if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical", But it can be slightly tilted.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one Connect to body;It can be mechanical connection, be also possible to be electrically connected;It can be directly connected, it can also be indirect by intermediary It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition State the concrete meaning of term in the present invention.
Embodiment
Fig. 1-Fig. 3 is please referred to, the present embodiment provides a kind of electromagnetic valve devices 100 comprising valve body 110, front mounting plate 120, fixed plate 130, solenoid valve 140 and core assembly 150.Valve body 110 is provided with preceding installation in a rectangular parallelepiped shape, on antetheca Plate 120 is additionally provided with fixed plate 130 far from the side of valve body 110 in front mounting plate 120.Solenoid valve 140 is arranged in fixed plate 130 sides far from valve body 110, core assembly 150 run through front mounting plate 120 and valve body 110.It is arranged on solenoid valve 140 There is gas outlet 141, stomata 131 is offered in fixed plate 130, core assembly 150 is connected to by stomata 131 with gas outlet 141.
Referring to figure 3., core assembly 150 includes successively end to end piston 151, main valve plug 152, the rebasing seat of primary seal 153 and rear end cap 154, and the volute spring 155 being set on main valve plug 152, piston 151 connect with stomata 131.When above-mentioned When having gas to pass through or leave in stomata 131, piston 151 moves under drive.
The longitudinal section of the main valve plug 152 of the present embodiment is native font, thus its both ends area is essentially identical so that both ends by Power is almost the same.It is traditional main valve plug (see Fig. 6) one big, it is one small.The both ends of the main valve plug 152 of the present embodiment and traditional master The big end of spool is compared, small more of area, thus more saves space.
Referring to figure 3. and Fig. 4, main valve plug 152 includes successively end to end first connecting portion 156, central axis 157 and the Two interconnecting pieces 158.First connecting portion 156 is arranged in the first accommodating chamber 132 of front mounting plate 120.The rebasing seat 153 of primary seal wraps It is rolled in 158 outside of second connecting portion.The diameter of first connecting portion 156 and second connecting portion 158 is all larger than the straight of central axis 157 Diameter.Front mounting plate 120 offers the first accommodating chamber 132 for accommodating core assembly 150, offers receiving spool in valve body 110 Second accommodating chamber 111 of component 150.
Please continue to refer to Fig. 3 and Fig. 4, the small end 161 and first of the volute spring 155 in centrally disposed 157 outside of axis connects Socket part 156 contradicts, and limits first connecting portion 156 in the axial direction of central axis 157 to the small end 161 of volute spring 155 Position.The first retention bead 133 with the first inclined-plane 134 is provided in first accommodating chamber 132.Above-mentioned first inclined-plane 134 and cone The outside of shape spring 155 cooperates, and limits volute spring 155 in the movement in the radial direction of central axis 157.Second accommodating chamber The second retention bead 112, the inner wall formation groove 113 of the second retention bead 112 and the second accommodating chamber 111 are provided on 111.On The inner wall for stating groove 113 includes the second inclined-plane 114, and one end of volute spring 155 is arranged in above-mentioned groove 113, and the second inclined-plane 114 with the fit inside of volute spring 155, realize in the axial direction of central axis 157 to the big end 162 of volute spring 155 into Row limit.
Referring to figure 3., primary seal pad is provided between second connecting portion 158 and the contact surface of the rebasing seat 153 of primary seal 163.Main valve plug 152 is fixedly connected with primary seal pad 163.In 140 closed state of solenoid valve, the above-mentioned rebasing seat 153 of primary seal It offsets with the second retention bead 112, realizes the sealing of the second retention bead 112 and main valve plug 152.
Referring to figure 3., between piston 151 and the inner wall of the first accommodating chamber 132, first connecting portion 156 and the first accommodating chamber Sealing ring 164 is both provided between 132 inner wall and between the rebasing seat 153 of primary seal and rear end cap 154.Also, piston 151 Outer wall, be provided with the seal groove 165 for placing sealing ring 164 on the inner wall of the first accommodating chamber 132 and the inner wall of rear end cap 154. Corresponding sealing ring 164 is set in above-mentioned position, can effectively realize the sealing of three faces junction, it is convenient to equipment part Protection.Seal groove 165 is set in the position of installation sealing ring 164, is conducive to sealing ring 164 being fixed on said one position It sets, the damage of sealing ring 164 can be effectively prevent, and increase the service life of entire core assembly 150.In the present embodiment, The number of sealing ring 164 is 3, is separately positioned on above-mentioned 3 positions.
Referring to figure 3. and Fig. 5, between the first accommodating chamber 132 and first connecting portion 156 and rear end cap 154 and primary seal pad It is provided with guiding wear ring 166 between pedestal 153, and is provided with wear-resistant trough on rear end cap 154 and the inner wall of the first accommodating chamber 132 167.Above-mentioned 166 intensity of guiding wear ring is big, and wearability is good, can effectively share face contact at above-mentioned two in use Frictional force, can effectively realize the protection to core assembly 150, improve its service life.It should be noted that above-mentioned two The position of a face contact can only have and be provided with guiding wear ring 166 at therein one, can realize that the present embodiment blows a bottle group Valve is closed, the technical effect that core assembly 150 occupies little space, all in the protection scope of the present embodiment.
When solenoid valve 140 is opened, control compressed air enters the top of piston 151 by stomata 131, push piston 151 to It is mobile close to rear end cap 154, volute spring 155 overcomes elastic force, open main valve plug 152, the second retention bead 112 with lead it is close Packing 163 is detached from.When solenoid valve 140 is closed, the compressed air of the top of piston 151 is discharged by stomata 131, main valve plug 152 by The elastic restoring force control of the volute spring 155 of compression, which resets, closes.
In conclusion electromagnetic valve device of the present invention, by the way that traditional main valve plug that longitudinal section is T shape is changed to indulge Section is the balanced type main valve plug of native font, and it is identical to realize main valve plug both ends stress.Also, by the outside of above-mentioned main valve plug It is arranged volute spring and keeps balance.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (7)

1. a kind of electromagnetic valve device, which is characterized in that before it includes valve body in a rectangular parallelepiped shape, the valve body is arranged in The front mounting plate of wall, that fixed plate of the front mounting plate far from the valve body side, setting is arranged in is remote in the fixed plate Solenoid valve from the valve body side and the core assembly through the front mounting plate and the valve body, the solenoid valve On be provided with gas outlet, stomata is offered in the fixed plate, the core assembly is connected to by the stomata with the gas outlet;
The core assembly includes successively end to end piston, longitudinal section is native font main valve plug, the rebasing seat of primary seal and Rear end cap, and the volute spring being set on the main valve plug, the piston are connect with one end of the stomata.
2. a kind of electromagnetic valve device according to claim 1, which is characterized in that the main valve plug includes successively joining end to end First connecting portion, central axis and second connecting portion, the diameter of the first connecting portion and the second connecting portion is all larger than institute The diameter for stating central axis, the small end and the first connecting portion that the volute spring on the outside of the central axis is arranged in contradict, The rebasing seat of primary seal is wrapped on the outside of the second connecting portion.
3. a kind of electromagnetic valve device according to claim 2, which is characterized in that offer the first appearance in the front mounting plate Receive chamber, the first connecting portion is arranged in first accommodating chamber, and the first retention bead is provided in the first accommodating chamber, described First retention bead has the first inclined-plane, the outside cooperation on first inclined-plane and the volute spring.
4. a kind of electromagnetic valve device according to claim 3, which is characterized in that offered described in receiving in the valve body Second accommodating chamber of core assembly is provided with the second retention bead, second retention bead and institute in second accommodating chamber The inner wall for stating the second accommodating chamber forms groove, and the inner wall of the groove includes the second inclined-plane, and one end of the volute spring is arranged In the groove, the fit inside on second inclined-plane and the volute spring.
5. a kind of electromagnetic valve device according to claim 4, which is characterized in that the second connecting portion and the primary seal Primary seal pad is provided between the contact surface of rebasing seat.
6. a kind of electromagnetic valve device according to claim 4, which is characterized in that the piston and first accommodating chamber Between inner wall, between the first connecting portion and the inner wall of first accommodating chamber and the rebasing seat of the primary seal and it is described after Be provided with sealing ring between end cap, and the outer wall of the piston, the inner wall of first accommodating chamber and the rear end cap it is interior The seal groove for placing the sealing ring is provided on wall.
7. a kind of electromagnetic valve device according to claim 4, which is characterized in that first accommodating chamber and described first connects Gap setting between gap and/or the rear end cap between socket part and the rebasing seat of the primary seal has guiding wear ring, and Wear-resistant trough is provided on the rear end cap and/or the inner wall of first accommodating chamber.
CN201811274412.9A 2018-10-30 2018-10-30 A kind of electromagnetic valve device Pending CN109282045A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811274412.9A CN109282045A (en) 2018-10-30 2018-10-30 A kind of electromagnetic valve device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811274412.9A CN109282045A (en) 2018-10-30 2018-10-30 A kind of electromagnetic valve device

Publications (1)

Publication Number Publication Date
CN109282045A true CN109282045A (en) 2019-01-29

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ID=65174573

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811274412.9A Pending CN109282045A (en) 2018-10-30 2018-10-30 A kind of electromagnetic valve device

Country Status (1)

Country Link
CN (1) CN109282045A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111795155A (en) * 2019-04-02 2020-10-20 株式会社鹭宫制作所 Electric valve and refrigeration cycle system
CN115962291A (en) * 2023-02-17 2023-04-14 新乡市华航航空液压设备有限公司 Energy-saving large-flow pulse type exhaust electromagnetic valve

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6325102B1 (en) * 1999-04-27 2001-12-04 Smc Corporation Servo driving pilot-type solenoid valve
US20030020033A1 (en) * 2001-07-25 2003-01-30 Chia-Ping Wang Solenoid gas valve
CN101551021A (en) * 2008-04-03 2009-10-07 鞍山电磁阀有限责任公司 Direct-acting type two-way solenoid valve
CN202074073U (en) * 2011-06-07 2011-12-14 瑞安市东洲机械有限公司 Bottom paper air suction valve for paper mounting machine
CN205383295U (en) * 2016-02-01 2016-07-13 奉化鑫益气动工程有限公司 Your five solenoid valve of high frequency
CN105805391A (en) * 2014-12-29 2016-07-27 浙江三花汽车零部件有限公司 Three-way electromagnetic piston valve
CN206786029U (en) * 2017-04-21 2017-12-22 浙江中孚流体机械有限公司 A kind of balance type two-way magnetic valve
CN209325064U (en) * 2018-10-30 2019-08-30 安沃驰气动设备(常州)有限公司 A kind of electromagnetic valve device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6325102B1 (en) * 1999-04-27 2001-12-04 Smc Corporation Servo driving pilot-type solenoid valve
US20030020033A1 (en) * 2001-07-25 2003-01-30 Chia-Ping Wang Solenoid gas valve
CN101551021A (en) * 2008-04-03 2009-10-07 鞍山电磁阀有限责任公司 Direct-acting type two-way solenoid valve
CN202074073U (en) * 2011-06-07 2011-12-14 瑞安市东洲机械有限公司 Bottom paper air suction valve for paper mounting machine
CN105805391A (en) * 2014-12-29 2016-07-27 浙江三花汽车零部件有限公司 Three-way electromagnetic piston valve
CN205383295U (en) * 2016-02-01 2016-07-13 奉化鑫益气动工程有限公司 Your five solenoid valve of high frequency
CN206786029U (en) * 2017-04-21 2017-12-22 浙江中孚流体机械有限公司 A kind of balance type two-way magnetic valve
CN209325064U (en) * 2018-10-30 2019-08-30 安沃驰气动设备(常州)有限公司 A kind of electromagnetic valve device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111795155A (en) * 2019-04-02 2020-10-20 株式会社鹭宫制作所 Electric valve and refrigeration cycle system
CN115962291A (en) * 2023-02-17 2023-04-14 新乡市华航航空液压设备有限公司 Energy-saving large-flow pulse type exhaust electromagnetic valve

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Effective date of registration: 20200911

Address after: No. 480, Xinmiao 3rd road, Xinqiao Town, Songjiang District, Shanghai, 201600

Applicant after: ASCO VALVE (SHANGHAI) Co.,Ltd.

Address before: 213000 No. 18 Xinya Road, Technology Industry Development Zone, Wujin High-tech Zone, Changzhou City, Jiangsu Province

Applicant before: ANWOCHI PNEUMATIC EQUIPMENT (CHANGZHOU) Co.,Ltd.