CN105370945B - Shock wave resistance valve - Google Patents
Shock wave resistance valve Download PDFInfo
- Publication number
- CN105370945B CN105370945B CN201510751884.9A CN201510751884A CN105370945B CN 105370945 B CN105370945 B CN 105370945B CN 201510751884 A CN201510751884 A CN 201510751884A CN 105370945 B CN105370945 B CN 105370945B
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- China
- Prior art keywords
- valve
- shock wave
- valve body
- valve disc
- disc
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/18—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on either side
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
Abstract
The invention discloses shock wave resistance valve, close valve disc to be arranged in the ventilating opening and can move, the rotating shaft is closed valve disc and by balancing pole with rotating shaft be connected on valve body, spring is mounted in balancing pole and closes on valve disc, during normal ventilation, close valve disc and body cavity centre position is under rotating shaft, balancing pole and spring effect, when generation malleation shock wave is when valve disc is closed, close valve disc and overcome resistance, valve body side is shifted to, is closed with valve body, separates internal and external channel；When producing negative pressure shock wave or producing suction function when valve disc is closed, close valve disc and overcome resistance, shift to valve body opposite side, closed with valve body, separate internal and external channel, when positive/negative-pressure active force disappears, valve disc recovers to centre position.The shock wave resistance valve of present invention valve disc under malleation and suction function can close, and when normally divulging information, after malleation or suction function disappearance, valve disc can automatically open up, and be acted on bidirectional protective, realize the advanced function of one side spring bidirectional protective.
Description
Technical field
The present invention relates to a kind of HVAC special equipment of building, more particularly to a kind of shock wave resistance valve.
Background technology
When carrying out safe design for some buildings, it is necessary to consider corresponding HVAC facilities design, the HVAC of building
Need to set impact resistance valve on special equipment, in order to avoid negative pressure caused by explosion wave, typhoon or cyclone etc., to building
Build the equipment in thing or personnel cause damage, it is necessary to which the hole installation inside and outside connecting building thing is when outside produces certain negative pressure
The shock wave resistance valve that moment closes.In order to avoid malleation caused by explosion wave causes to damage to the equipment in building or personnel
Wound is, it is necessary to shock wave resistance valve moment closing when outside produces certain malleation of the hole installation inside and outside connecting building thing.For
Reach the purpose that can close moment under malleation, negative pressure, it is necessary to a kind of shock wave resistance valve with bidirectional protective effect, once
When above-mentioned malleation or negative pressure condition occur, shock wave resistance valve needs moment to close, and separates interface channel inside and outside building, avoids building
Build pressure in thing rise sharply or rapid drawdown and cause unnecessary loss, when that blast, typhoon or cyclone etc. may occur on building
Acted on bidirectional protective.
The shock wave resistance valve of prior art has certain limitation：1st, a kind of impact resistance valve be by blade one-directional rotation,
Closed with valve body, separate shock wave.When shock wave acts on valve disc or cyclone formation suction function in valve the other way around
Ye Shi, valve disc can not close with valve body, therefore can not separate shock wave or negative pressure.2nd, it is that valve disc does not have to also have a kind of situation
Connected by rotating shaft with valve body, valve disc moving direction can not determine, valve disc may move up and down, or rotate, and make
Use state labile.3rd, after valve disc is closed, after malleation or negative pressure disappear, it is impossible to automatically open up, be unable to reach two-way guarantor
Shield, also can not automatic returning nature.4th, it is mostly to be assemblied to form by part welding, a large amount of pads and welding quality is present
Problem, influence the intensity and aesthetics of valve.5th, valve body gas channel have no basis gas dynamics design, vortex can be produced
Or turbulent flow, increase flow resistance, result in the need for closing slowly during moment closing, protective effect can not be effectively played.
The content of the invention
The purpose of the present invention is：For the problems of the prior art, there is provided one kind valve disc under malleation and suction function is equal
It can close, and after malleation or suction function disappear, valve disc can automatically open up, and have bidirectional protective effect shock wave resistance valve.
The technical scheme is that：Shock wave resistance valve, it is characterised in that：It includes valve body, closes valve disc, rotating shaft, puts down
Weigh bar, spring, end baffle, and the valve body is provided with ventilating opening, and the closing valve disc is arranged in the ventilating opening and can moved
Dynamic, the rotating shaft is on the valve body, and the closing valve disc is connected by the balancing pole with the rotating shaft, the spring
On the balancing pole and the closing valve disc, when normally divulging information, the closing valve disc is in the rotating shaft, balancing pole and bullet
Spring effect is lower to be in body cavity centre position, when producing malleation shock wave in the closing valve disc, the shutoff valve
Leaf overcomes resistance, shifts to valve body side, is closed with valve body, separates internal and external channel；Make when producing negative pressure shock wave or producing negative pressure
During for the closing valve disc, the closing valve disc overcomes resistance, shifts to valve body opposite side, is closed with valve body, is led to inside and outside cut-off
Road, in normal ventilation, when positive/negative-pressure active force disappears, the closing valve disc recovers to centre position.
Preferably, shock wave resistance valve different installation can realize difference in functionality, when being horizontally mounted, the closing valve disc
In intracavitary centre position, the shock wave resistance valve is in normally open；When vertically-mounted, the closing valve disc and the valve body
Closure, the shock wave resistance valve are in normally closed position.
Preferably, the valve body includes one or more ventilating openings, and each ventilating opening is separate.
The closing valve disc is connected with the balancing pole by latch, and the spring is S type springs, the closing valve disc
Due to the balancing pole restriction effect, can only do movable, it is impossible to rotate.
Preferably, the valve body uses Anodising aluminium alloy material.
Preferably, the valve body shaping, welding, form several independent ventilation cavitys, and cavity geometry is ellipse
Type, cavity inlet and outlet have circular arc chamfering, match with shutoff valve leaf shape, and so closing valve disc is bonded tighter with valve body
It is close, more meet fluid mechanics principle requirement.
Preferably, the side of valve body four is equipped with half of bolt hole, per 2, side, is distributed in two sections.
Preferably, for the valve body with the end baffle by screw connection, respectively there are 4 screws at both ends.
Preferably, the shock wave resistance valve also includes the intermediate connector between framework, press strip, end coupling, valve body,
Body top and bottom are all provided with fluted, and for placing valve body and valve body intermediate connector, the intermediate connector can will be more
Individual valve body, which links together, to be applied in combination, and there is bolt hole at the intermediate connector, press strip, the both ends of end coupling, described
Intermediate connector is positioned in the body top or the groove of bottom, and its bolt hole matches with valve body bolt hole, for valve body
Between connect, the press strip is used to valve body being fixed on framework, and bolt passes through press strip bolt hole, valve body and intermediate connector bolt
Hole, valve body is fixed on framework.
Preferably, end coupling is used to fix at the shock wave resistance valve both ends, and bolt passes through press strip bolt hole and end
Portion's connector bolt hole, the shock wave resistance valve both ends are fixed on framework.
It is an advantage of the invention that：
1st, under malleation and suction function, valve disc can close, and after malleation or suction function disappear, valve disc can be certainly
It is dynamic to open, there is bidirectional protective effect.The invention also achieves the advanced function of one side spring bidirectional protective.
2nd, valve body and valve disc are by an extrusion forming, without any welding.Intensity is big, saves process, improves operating efficiency.
3rd, valve body, valve disc and end baffle use Anodising aluminium alloy material, have excellent corrosion resistance, are more suitable for
In coastal climate.There are excellent high temperature resistance performance, sustainable more than 120 minutes of 400 DEG C of high temperature simultaneously.Add because the material is excellent
Work characteristic so that its resistance shock wave ability is very high, bears reflected pressure up to 2300kpa.Material itself is light, own load
Small, the shut-in time is short.
4th, the gas channel of valve body and valve disc composition is designed according to gas dynamics, and gas-flow resistance is small, cavity shape
Shape is ellipse, and cavity inlet and outlet has circular arc chamfering.Be advantageous to close valve disc energy quick-make when needing quick-make,
The safety of personnel and property in building is protected to greatest extent.
When the 5th, normally divulging information, close valve disc and body cavity centre position is under rotating shaft, balancing pole and spring effect.
When blast produces malleation shock wave when valve disc is closed, closing valve disc overcomes resistance, shifts to valve body side, is closed with valve body
Close, separate building internal and external channel.Suction function is produced in closing valve disc when blast produces negative pressure shock wave or cyclone etc.
When, close valve disc and overcome resistance, shift to valve body opposite side, closed with valve body, separate building internal and external channel.During normal ventilation,
When active force disappears, valve disc recovers to home position.Bidirectional protective can be haveed the function that, and can is automatic according to ambient conditions
Valve disc position is closed in regulation, beneficial to air circulation, is gone to supervise without manpower and act can and reach bidirectional protective and lead to automatically
Wind action, improve automation.
6th, shock wave resistance valve different installation disclosed in this invention can realize difference in functionality, when being horizontally mounted, institute
State closing valve disc and be in intracavitary centre position, the shock wave resistance valve is in normally open；When vertically-mounted, the closing valve disc
Closed with the valve body, the shock wave resistance valve is in normally closed position.With separating building thing internal and external channel debris can be avoided to enter
In building.Using the gravity for closing valve disc, same valve may be mounted at different places, realize different functions.
Brief description of the drawings
Below in conjunction with the accompanying drawings and embodiment the invention will be further described：
Fig. 1 is the schematic diagram of stereogram 1 of shock wave resistance valve disclosed in this invention.
Fig. 2 is the front view schematic diagram of shock wave resistance valve disclosed in this invention.
Fig. 3 is the top view illustration of shock wave resistance valve disclosed in this invention.
Fig. 4 is the diagrammatic cross-section of A-A in shock wave resistance valve Fig. 3 disclosed in this invention.
Fig. 5 is the rearview schematic diagram of shock wave resistance valve disclosed in this invention.
Fig. 6 is the schematic diagram of stereogram 2 of shock wave resistance valve disclosed in this invention.
Fig. 7 .1 are the normal ventilation state schematic diagram of shock wave resistance valve disclosed in this invention.
Fig. 7 .2 are the malleation closed mode schematic diagram of shock wave resistance valve disclosed in this invention.
Fig. 7 .3 are the negative pressure closed mode schematic diagram of shock wave resistance valve disclosed in this invention.
Fig. 8 is the schematic diagram that shock wave resistance valve disclosed in this invention connects with framework.
Fig. 9 is the schematic diagram that shock wave resistance valve disclosed in this invention connects with framework.
Figure 10 is the schematic diagram that shock wave resistance valve disclosed in this invention connects with end coupling.
Wherein：1st, valve body 2, closing valve disc 3, rotating shaft 4, balancing pole 5, spring 6, end baffle 7, latch 8, chamber
Body 9, valve body bolt hole 10, screw 11, framework 12, press strip 13, end coupling 14, intermediate connector 15, groove
Embodiment
Below in conjunction with the accompanying drawings and technical solution of the present invention is described in detail preferred embodiment.
As shown in figure 1, the invention discloses a kind of shock wave resistance valve, it includes valve body 1, closes valve disc 2, rotating shaft 3, balance
Bar 4, spring 5, end baffle 6, the valve body 1 are provided with ventilating opening, and the closing valve disc 2 is arranged in the ventilating opening and can be with
Mobile, on the valve body 1, the closing valve disc 2 is connected by the balancing pole 4 with the rotating shaft 3 for the rotating shaft 3,
The spring 5 is S type springs, and the spring 5 is mounted in the balancing pole 4 and closes on valve disc 2, when normally divulging information, the closing
Valve disc 2 is in the inner chamber centre position of valve body 1 under the effect of the rotating shaft 3, balance bar 4 and spring 5, when generation malleation shock wave
When acting on the closing valve disc 2, the closing valve disc 2 overcomes resistance, shifts to the side of valve body 1, is closed with valve body 1, in cut-off
Outer tunnel；When producing negative pressure shock wave or producing suction function in the closing valve disc 2, the closing valve disc 2 overcomes resistance,
The opposite side of valve body 1 is shifted to, is closed with valve body 1, separates internal and external channel, in normal ventilation, when positive/negative-pressure active force disappears, institute
Closing valve disc 2 is stated to recover to centre position.Shock wave resistance valve of the present invention valve disc 2 under malleation and suction function can close
Close, and in normal ventilation, after malleation or suction function disappear, the closing valve disc 2 can automatically open up, and have to building
There is bidirectional protective effect.The invention also achieves the advanced function of one side spring bidirectional protective.
The shock wave resistance valve different installation can realize difference in functionality, when being horizontally mounted, at the closing valve disc 2
In intracavitary centre position, the shock wave resistance valve is in normally open；When vertically-mounted, the closing valve disc 2 and the valve body 1
Closure, the shock wave resistance valve are in normally closed position, with separating building thing internal and external channel debris can be avoided to enter in building.
Using the gravity for closing valve disc 2, same valve may be mounted at different places, realize different functions.
The valve body 1 of the shock wave resistance valve includes one or several ventilating openings, and each ventilating opening is separate.Can group
Close and use, will not interfere again.
The closing valve disc 2 is connected with the balancing pole 4 by latch 7, and the spring 5 is S type springs, the closing
Valve disc 2 can only be done movable, it is impossible to rotate due to the restriction effect of balancing pole 4.So can very stable, safety
Realize that bidirectional protective acts in ground.
The valve body 1 disclosed in this invention uses Anodising aluminium alloy material.Valve body 1, close valve disc 2 and end baffle
6 use Anodising aluminium alloy material, have excellent corrosion resistance, more suitable for coastal climate.There is excellent resistance to height simultaneously
Warm nature energy, sustainable more than 120 minutes of 400 DEG C of high temperature.Due to the excellent processing characteristics of the material so that it resists shock wave ability
It is very high, reflected pressure is born up to 2300kpa.Material itself is light, and own load is small, and the shut-in time is short.
Preferably, the valve body 1 is integrally formed by extruding, welding, forms several independent ventilation cavitys 8, cavity 8
Be shaped as ellipse, the inlet and outlet of cavity 8 has circular arc chamfering, with close the shape of valve disc 2 match, so close valve disc 2 and
Valve body 1 is bonded more closely, and body strength is big, process is saved, beneficial to production.Valve body 1 and close valve disc 2 form gas channel be
Designed according to gas dynamics, gas-flow resistance is small, and cavity 8 is shaped as ellipse, and the inlet and outlet of cavity 8 has circular arc to fall
Angle.Be advantageous to close the energy quick-make when needing quick-make of valve disc 2, protect personnel and property in building to greatest extent
Safety.
The side of shock wave resistance valve body 1 four is equipped with half of valve body bolt hole 9, per 2, side, is distributed in two sections.This and
Half of bolt hole collocation on other connector.
The valve body 1 of the shock wave resistance valve is connected with end baffle 6 by screw 10, and respectively there are 4 screws at both ends.
Further, in addition to the intermediate connector 14 between framework 11, press strip 12, end coupling 13, valve body 1, in valve
The top and bottom of body 1 are all provided with fluted 15, and for placing valve body 1 and valve body intermediate connector 14, the intermediate connector 14 can
It is applied in combination so that multiple valve bodies are linked together, the intermediate connector 14, press strip 12, the both ends of end coupling 13 have
Bolt hole, the intermediate connector 14 are positioned in the groove 15 at the top of valve body 1 or bottom, its bolt hole and valve body bolt
Hole 9 matches, and for being connected between valve body, the press strip 12 is used to valve body 1 being fixed on framework 11, and bolt passes through press strip bolt
Hole, valve body 1 and the bolt hole of intermediate connector 14, valve body is fixed on framework.End coupling 13 is used for the shock resistance
Ripple valve both ends are fixed, and bolt passes through press strip bolt hole and the bolt hole of end coupling 13, and the shock wave resistance valve both ends are fixed
In on framework.
The present invention still has numerous embodiments, all technical sides formed using equivalents or equivalent transformation
Case, all fall within protection scope of the present invention.
Claims (8)
1. shock wave resistance valve, it is characterised in that：It includes valve body, closes valve disc, rotating shaft, balancing pole, spring, end baffle, institute
State valve body and be provided with ventilating opening, the closing valve disc is arranged in the ventilating opening and can moved, and the rotating shaft is embedded in the valve
On body, the closing valve disc is connected by the balancing pole with the rotating shaft, and the spring is mounted in the balancing pole and described
Close on valve disc, when normally divulging information, the closing valve disc is in body cavity under the rotating shaft, balancing pole and spring effect
Centre position, when producing malleation shock wave in the closing valve disc, the closing valve disc overcomes resistance, shifts to valve body one
Side, closed with valve body, separate internal and external channel；When producing negative pressure shock wave in the closing valve disc, the closing valve disc
Overcome resistance, shift to valve body opposite side, closed with valve body, separate internal and external channel, when normally divulging information, when positive/negative-pressure active force disappears
When, the closing valve disc recovers to centre position；The closing valve disc is connected with the balancing pole by latch, the spring
For S type springs, the closing valve disc can only be done movable, it is impossible to rotate due to the balancing pole restriction effect；It is also
Including the intermediate connector between framework, press strip, end coupling, valve body, be all provided with body top and bottom it is fluted, for putting
Valve body and valve body intermediate connector are put, multiple valve bodies can be linked together and are applied in combination by the intermediate connector, in described
Between connector, press strip, the both ends of end coupling have bolt hole, the intermediate connector is positioned over the body top or bottom
In the groove in portion, its bolt hole matches with valve body bolt hole, and for being connected between valve body, the press strip is used to valve body being fixed on frame
On frame, bolt passes through press strip bolt hole, valve body and intermediate connector bolt hole, and valve body is fixed on framework.
2. shock wave resistance valve according to claim 1, it is characterised in that：The shock wave resistance valve different installation can be with
Difference in functionality is realized, when being horizontally mounted, the closing valve disc is in intracavitary centre position, and the shock wave resistance valve is in normally opened shape
State；When vertically-mounted, the closing valve disc closes with the valve body, and the shock wave resistance valve is in normally closed position.
3. shock wave resistance valve according to claim 1, it is characterised in that：The valve body includes one or more ventilating openings,
Each ventilating opening is separate.
4. shock wave resistance valve according to claim 1, it is characterised in that：The valve body uses Anodising aluminium alloy material.
5. shock wave resistance valve according to claim 1, it is characterised in that：The valve body shaping, welding, is formed only
Vertical ventilation housing, the cavity geometry is ellipse, and the cavity inlet and outlet has circular arc chamfering, with shutoff valve leaf shape phase
Matching, so closing valve disc are bonded closer with valve body, more meet fluid mechanics principle requirement.
6. shock wave resistance valve according to claim 1, it is characterised in that：The side of valve body four is equipped with half of bolt hole,
Per 2, side, two sections are distributed in.
7. shock wave resistance valve according to claim 1, it is characterised in that：The valve body passes through screw with the end baffle
Connection, respectively there are 4 screws at both ends.
8. shock wave resistance valve according to claim 7, it is characterised in that：End coupling is used for the shock wave resistance valve
Both ends are fixed, and bolt passes through press strip bolt hole and end coupling bolt hole, and the shock wave resistance valve both ends are fixed on into framework
On.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510751884.9A CN105370945B (en) | 2015-11-06 | 2015-11-06 | Shock wave resistance valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510751884.9A CN105370945B (en) | 2015-11-06 | 2015-11-06 | Shock wave resistance valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105370945A CN105370945A (en) | 2016-03-02 |
| CN105370945B true CN105370945B (en) | 2018-02-27 |
Family
ID=55373401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510751884.9A Active CN105370945B (en) | 2015-11-06 | 2015-11-06 | Shock wave resistance valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105370945B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016568B (en) * | 2016-08-05 | 2021-10-19 | 上海士诺净化科技有限公司 | Bidirectional ventilation opening structure and installation method thereof |
| CN106090253B (en) * | 2016-08-17 | 2018-06-05 | 南方风机股份有限公司 | It is a kind of can two-way reset shock wave resistance valve |
| CN106679142B (en) * | 2016-12-02 | 2022-06-14 | 无锡斐冠工业设备有限公司 | Frame integrated impact-resistant closed tornado valve |
| CN107300031A (en) * | 2017-08-04 | 2017-10-27 | 江苏爵格工业设备有限公司 | A kind of two-way flame proof valve |
| CN108087600A (en) * | 2017-12-29 | 2018-05-29 | 上海震业机电有限公司 | A kind of anti-explosive valve of the efficient linear sealing structure of bidirectional protective |
| CN108344142A (en) * | 2018-01-23 | 2018-07-31 | 浙江上风高科专风实业有限公司 | A kind of sector structure shock-wave resistant air vent valve |
| CN108240493A (en) * | 2018-02-01 | 2018-07-03 | 中国核电工程有限公司 | Explosion-wave-preventing Ventilating valve and the ventilating system comprising the valve |
| CN110159814A (en) * | 2019-06-19 | 2019-08-23 | 江苏爵格工业设备有限公司 | Anti-explosive valve |
| CN114165608A (en) * | 2021-12-17 | 2022-03-11 | 浙江上风高科专风实业股份有限公司 | Double-row valve shaft bidirectional reciprocating shock wave resistant valve and machining process |
| CN117552701A (en) * | 2023-11-10 | 2024-02-13 | 常州华东人防设备有限公司 | Bidirectional wave-absorbing explosion-proof valve |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE306459B (en) * | 1965-04-29 | 1968-11-25 | B Eliasson | |
| JPH0671154A (en) * | 1991-07-17 | 1994-03-15 | Tokyo Electron Ltd | Gas induction device for vacuum chamber |
| CN102927669B (en) * | 2012-11-23 | 2015-05-20 | 无锡斐冠工业设备有限公司 | Bilateral shock-wave resistant air vent valve |
| CN203202315U (en) * | 2013-03-01 | 2013-09-18 | 广东万和电气有限公司 | Extractor hood check valve |
| CN204023821U (en) * | 2014-08-12 | 2014-12-17 | 上海震业机电有限公司 | Anti-explosive valve |
| CN205298713U (en) * | 2015-11-06 | 2016-06-08 | 江苏爵格工业设备有限公司 | Ripples valve shocks resistance |
-
2015
- 2015-11-06 CN CN201510751884.9A patent/CN105370945B/en active Active
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| CN105370945A (en) | 2016-03-02 |
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Address after: 224100 Jiangsu Yancheng City Dafeng Economic Development Zone South of pump valve industrial park Patentee after: Jiangsu Dragon Industries Equipment Co., Ltd. Address before: 224100 Jiangsu Yancheng City Economic Development Zone, south of pump valve industrial park. Patentee before: Jiangsu Dragon Industries Equipment Co., Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20200508 Address after: Room 201, floor 2, building 4, 499 beimin Road, Chedun Town, Songjiang District, Shanghai 200082 Patentee after: Shanghai juege Industrial Engineering Co., Ltd Address before: 224100 South Head of Pump Valve Industrial Park of Dafeng Economic Development Zone, Yancheng City, Jiangsu Province Patentee before: JIANGSU DRAGON INDUSTRIAL EQUIPMENT Co.,Ltd. |