CN107314139B - Reusable flameless discharge device - Google Patents
Reusable flameless discharge device Download PDFInfo
- Publication number
- CN107314139B CN107314139B CN201710660514.3A CN201710660514A CN107314139B CN 107314139 B CN107314139 B CN 107314139B CN 201710660514 A CN201710660514 A CN 201710660514A CN 107314139 B CN107314139 B CN 107314139B
- Authority
- CN
- China
- Prior art keywords
- plate
- spring
- fire
- flange plate
- rear plate
- 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.)
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- 230000009970 fire resistant effect Effects 0.000 claims abstract description 22
- 230000002093 peripheral effect Effects 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 230000004888 barrier function Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000004880 explosion Methods 0.000 description 13
- 238000013022 venting Methods 0.000 description 12
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 230000006872 improvement Effects 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0413—Safety 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 closure plates
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
-
- 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
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
-
- 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
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Measuring Fluid Pressure (AREA)
- Springs (AREA)
Abstract
The invention discloses a reusable flameless bleeder device, which comprises a flange plate, a supporting plate, a spring, a fire-resistant layer and a rear plate, wherein: the flange plate is of an annular structure, a discharge opening is formed in the middle of the flange plate, and the support plate covers the discharge opening. The rear plate is connected above the flange plate through a plurality of groups of screws and is coaxial with the flange plate, and the screws are positioned on the outer side of the supporting plate. The spring is arranged between the supporting plate and the rear plate, the upper end of the spring is connected to the supporting plate, and the lower end of the spring is connected to the rear plate. The fire-resistant layer is of a closed cylindrical structure, the upper end of the fire-resistant layer is in sealing connection with the peripheral edge of the rear plate, and the lower end of the fire-resistant layer is in sealing connection with the peripheral edge of the flange plate. When the device is depressurized, high-pressure air flow is released from the gap of the fire-resistant layer to the atmosphere.
Description
Technical Field
The present invention relates to a reusable flameless vent device.
Background
As shown in fig. 1, the flameless vent device of the prior art comprises a fixed frame 1, a explosion venting plate 2 and a flame retardant layer 3. The method has the following technical defects: 1. after explosion venting, the explosion venting plate 2 is torn and damaged, so that the explosion venting plate 2 needs to be frequently replaced, thereby increasing the production cost; 2. after explosion venting, the explosion venting plate 2 is damaged, so that the outside air tends to flow back into the pipeline; 3. the opening pressure of the explosion venting plate 2 is fixed, so that the explosion venting plate can only meet the explosion venting requirement under specific pressure conditions, and has poor universality.
Disclosure of Invention
The invention provides a reusable flameless bleeder device aiming at the problems, which has the following specific technical scheme:
a reusable flameless vent device comprising a flange plate, a support plate, a spring, a fire barrier layer, and a back plate, wherein: the flange plate is of an annular structure, a discharge opening is formed in the middle of the flange plate, and the support plate covers the discharge opening. The rear plate is connected above the flange plate through a plurality of groups of screws and is coaxial with the flange plate, and the screws are positioned on the outer side of the supporting plate. The spring is arranged between the supporting plate and the rear plate, the lower end of the spring is connected to the supporting plate, and the upper end of the spring is connected to the rear plate. The fire-resistant layer is of a cylindrical laminated structure, the upper end of the fire-resistant layer is in sealing connection with the peripheral edge of the rear plate, and the lower end of the fire-resistant layer is in sealing connection with the peripheral edge of the flange plate.
As a further improvement of the present invention, a boss matching with the upper end size of the spring is formed at the middle part of the rear plate, and a groove matching with the lower end size of the spring is formed at the middle part of the support plate.
As a further development of the invention, the spring is a conical spring with a thin upper part and a thick lower part.
As a further improvement of the invention, a plurality of groups of mounting holes penetrating through the rear plate are formed in the rear plate along the circumferential direction, a plurality of groups of threaded holes corresponding to the mounting holes one by one are formed in the corresponding positions of the flange plate, external threads are formed at the upper end and the lower end of the screw rod, the upper end of the screw rod penetrates through the mounting holes and is connected with the rear plate through nuts, and the lower end of the screw rod is fixedly connected in the threaded holes in a threaded mode.
As a further improvement of the invention, an O-ring is arranged between the contact surfaces of the support plate and the flange plate.
As a further improvement of the invention, the inner periphery of the flange plate is provided with a circular mounting groove, and the O-shaped ring is mounted in the mounting groove.
As a further improvement of the invention, the fire-resistant layer is formed by stacking stainless steel filter screens or corrugated stainless steel.
As a further improvement of the invention, the outer peripheral edge of the rear plate is downwards rolled to form a first buckling part, the outer peripheral edge of the flange plate is upwards rolled to form a second buckling part, the upper end of the fire-resisting layer is buckled and connected with the outer peripheral edge of the rear plate through the first buckling part, and the lower end of the fire-resisting layer is buckled and connected with the outer peripheral edge of the flange plate through the second buckling part.
Compared with the prior art, the flameless bleeder device provided by the invention has the following remarkable technical effects: 1. after the pressure in the pipeline is released, the supporting plate can be quickly reset under the extrusion of the spring, so that the closing reset of the release device is realized, and the external air is prevented from flowing back into the pipeline; 2. in the explosion venting process, the supporting plate is not damaged, and the supporting plate can be repeatedly used for a plurality of times, so that the production cost is reduced; 3. the opening pressure of the invention can be flexibly adjusted by adjusting the compression amount of the spring, so that the invention can meet various explosion venting scenes.
Drawings
FIG. 1 is a schematic view of a flameless vent device of the prior art;
FIG. 2 is a schematic illustration of a reusable flameless vent device according to the present invention;
fig. 3 is a top view of fig. 2.
Detailed Description
The present invention will be described in further detail with reference to the drawings and the detailed description below, in order to make the above objects, features and advantages of the present invention more comprehensible.
As shown in fig. 2 and 3, the reusable flameless bleeder device provided by the present invention comprises a flange plate 1, a support plate 3, a spring 4, a damping layer 6, a rear plate 12 and other components.
The flange plate 1 is of an annular structure, a circular discharge opening is formed in the middle of the flange plate 1, and the support plate 3 is arranged on the flange plate 1 and covers the discharge opening. The rear plate 12 has a size substantially identical to the size of the flange plate 1, and is connected above the flange plate 1 and coaxial with the flange plate 1 via several sets of screws 8, the screws 8 being located outside the support plate. The spring 4 is arranged between the support plate 3 and the rear plate 12, the lower end of the spring 4 is connected to the support plate 3, and the upper end of the spring 4 is connected to the rear plate 12.
The fire-resistant layer 6 is of a cylindrical laminated structure, the upper end of the fire-resistant layer 6 is in sealing connection with the peripheral edge of the rear plate 12, and the lower end of the fire-resistant layer 6 is in sealing connection with the peripheral edge of the flange plate 1.
The fire-resistant layer 6 is made of a metal material with good heat resistance and strong air permeability, high-pressure air flow can smoothly pass through the fire-resistant layer 6, and flame cannot pass through the fire-resistant layer 6, so that flameless discharge is realized.
In some embodiments, the fire-blocking layer 6 is formed by stacking stainless steel filter screens. In another embodiment, the fire barrier layer 6 is laminated from corrugated stainless steel.
The opening pressure of the flameless vent device of the present invention depends on the compression of the spring 4. In the unopened state, the support plate 3 is in sealing connection with the flange plate 1 and completely covers the relief opening in the flange plate 1 under the compression of the spring 4.
In use, the invention is first mounted to an external pressure pipe via the flange holes in the flange plate 1. At this time, the air pressure in the external pipe is applied to the lower surface of the support plate 3, and the pressing force of the spring 4 is applied to the upper surface of the support plate 3.
When explosion occurs in the outer pipe, the air pressure in the outer pipe is larger than the extrusion force of the spring 4 (namely, the opening pressure of the flameless discharge device), the supporting plate 3 is propped open, and the high-pressure air flows through the discharge opening to enter the flameless discharge device and is discharged to the outside after being filtered by the fire-blocking layer 6.
With the release of the internal pressure, the air pressure in the external pipe drops sharply, and when the air pressure in the external pipe drops to be smaller than the extrusion force of the spring 4 (namely, the opening pressure of the flameless release device), the support plate 3 resets and covers the release opening again, the flameless release device is closed, and the explosion venting process is finished.
The opening pressure of the flameless vent device of the present invention is entirely dependent on the amount of compression of the spring 4. Therefore, in order to flexibly adjust the opening pressure of the invention, the invention can meet various application scenes. As shown in fig. 2, in some embodiments, a plurality of groups of mounting holes penetrating the rear plate 12 are provided on the rear plate 12 along the circumferential direction, and a plurality of groups of threaded holes corresponding to the mounting holes one by one are provided at corresponding positions of the flange plate 1. External threads are arranged at the upper end and the lower end of the screw rod 8, the upper end of the screw rod 8 penetrates through the mounting hole and extends to the upper side of the rear plate 12, and the upper end of the screw rod 8 is connected with the rear plate 12 through a nut 9. The lower end of the screw rod 8 is fixedly and spirally connected in the threaded hole.
By simultaneously screwing the nuts 9 at the upper ends of the respective screws 8, the back plate 12 can be moved up and down within a certain range, thereby adjusting the compression amount of the springs 4. Of course, the spring may be replaced according to specific needs in order to more flexibly adjust the opening pressure of the present invention.
In order to improve the sealing performance between the upper end of the screw 8 and the rear plate 12, preferably, a gasket 7 is interposed between the nut 9 and the rear plate 12.
In some embodiments, the spring 4 is a conical spring with a shape of a tower, which is thin at the top and thick at the bottom, and when the conical spring is pressed, the conical spring can achieve a combination of rings, i.e. the small ring above can be embedded in the large ring below, and in the limit, the conical spring can be pressed into a planar structure. It can be seen that the conical spring has a very large compression adjustment range, thereby increasing the adjustment range of the opening pressure of the flameless bleeder device of the present invention.
As shown in fig. 2, a boss matching the upper end size of the spring 4 is formed at the middle part of the rear plate 12, and a groove matching the lower end size of the spring is formed at the middle part of the support plate 3. In the installation process, the upper end of the spring 4 is only required to be clamped on the boss, the lower end of the spring 4 is embedded into the groove, and the quick installation of the spring 4 can be completed. Furthermore, the boss and the groove can ensure that the spring 4 is located on the same mounting axis as the rear plate 12 and the support plate 3.
As shown in fig. 2, in some embodiments, a first screw hole and a screw 11 matched with the first screw hole are disposed at a central position of the rear plate 12, and a second screw hole and a nut 5 matched with the second screw hole are disposed at a central position of the supporting plate 3. In order to improve the connection tightness between the screw 11 and the first screw hole, preferably, a gasket 10 is provided between the contact surface of the screw 11 and the rear plate 12.
In some embodiments, as shown in fig. 2, the flange plate 1 is provided with a circular mounting groove along the inner periphery, and the O-ring 2 is plugged into the mounting groove. The O-ring 2 can improve the tightness between the contact surfaces of the support plate 3 and the flange plate 1.
In order to prevent the fire-resistant layer 6 from being flushed by high-pressure air flow, the connection strength of the fire-resistant layer 6 with the flange plate 1 and the rear plate 12 is improved. As shown in fig. 2, in some embodiments, the outer periphery of the rear plate 12 is rolled down to form a first fastening portion, and the outer periphery of the flange plate 1 is rolled up to form a second fastening portion. The upper end of the fire-resistant layer 6 is in snap connection with the peripheral edge of the rear plate 12 through the first snap-fit portion, and the lower end of the fire-resistant layer 6 is in snap connection with the peripheral edge of the flange plate 1 through the second snap-fit portion.
The invention has been described above in sufficient detail with a certain degree of particularity. It will be appreciated by those of ordinary skill in the art that the descriptions of the embodiments are merely exemplary and that all changes that come within the true spirit and scope of the invention are desired to be protected. The scope of the invention is indicated by the appended claims rather than by the foregoing description of the embodiments.
Claims (4)
1. A reusable flameless vent device, characterized by: it includes flange board, backup pad, spring, fire barrier and back plate, wherein: the flange plate is of an annular structure, a discharge port is formed in the middle of the flange plate, and the support plate covers the discharge port; the rear plate is connected above the flange plate through a plurality of groups of screws and is coaxial with the flange plate, and the screws are positioned on the outer side of the supporting plate; the spring is a conical spring with thin upper part and thick lower part and in a tower shape, the spring is coaxially arranged between the supporting plate and the rear plate, a boss matched with the upper end of the spring in size is formed in the middle of the rear plate, a groove matched with the lower end of the spring in size is formed in the middle of the supporting plate, the lower end of the spring is connected in the groove in the supporting plate, and the upper end of the spring is connected on the boss in the rear plate; the upper end of the fire-resistant layer is in sealing connection with the peripheral edge of the rear plate, and the lower end of the fire-resistant layer is in sealing connection with the peripheral edge of the flange plate; a plurality of groups of mounting holes penetrating through the rear plate are formed in the rear plate along the circumferential direction, a plurality of groups of threaded holes corresponding to the mounting holes one by one are formed in the corresponding positions of the flange plate, external threads are formed at the upper end and the lower end of each screw rod, the upper end of each screw rod penetrates through the corresponding mounting hole and is connected with the rear plate through nuts, and the lower end of each screw rod is fixedly connected in the corresponding threaded hole in a threaded mode; the periphery of the rear plate is downwards rolled to form a first buckling part, the periphery of the flange plate is upwards rolled to form a second buckling part, the upper end of the fire-resisting layer is buckled and connected with the periphery of the rear plate through the first buckling part, and the lower end of the fire-resisting layer is buckled and connected with the periphery of the flange plate through the second buckling part; the center position of the back plate is provided with a first screw hole and a screw rod matched with the first screw hole, and the center position of the support plate is provided with a nut.
2. The reusable flameless vent device of claim 1, wherein: an O-shaped ring is arranged between the contact surfaces of the support plate and the flange plate.
3. The reusable flameless vent device of claim 2, wherein: the flange plate is characterized in that a circular mounting groove is formed in the inner periphery of the flange plate, and the O-shaped ring is mounted in the mounting groove.
4. The reusable flameless vent device of claim 1, wherein: the fire-resistant layer is formed by stacking stainless steel filter screens or corrugated stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710660514.3A CN107314139B (en) | 2017-08-04 | 2017-08-04 | Reusable flameless discharge device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710660514.3A CN107314139B (en) | 2017-08-04 | 2017-08-04 | Reusable flameless discharge device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107314139A CN107314139A (en) | 2017-11-03 |
| CN107314139B true CN107314139B (en) | 2023-12-08 |
Family
ID=60170318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710660514.3A Active CN107314139B (en) | 2017-08-04 | 2017-08-04 | Reusable flameless discharge device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107314139B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115721895A (en) * | 2022-12-30 | 2023-03-03 | 郑州中泰安科粉体科技有限公司 | Repeated flameless discharge device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050725A (en) * | 2006-04-03 | 2007-10-10 | 中国船舶重工集团公司第七一一研究所 | Flow guide anti-explosion valve |
| CN206111335U (en) * | 2016-08-26 | 2017-04-19 | 山东圣力发动机有限公司 | Natural gas engine explosion -proof equipment with back -fire relief function |
| CN206334238U (en) * | 2016-12-30 | 2017-07-18 | 吴江天吴特种安全阀有限公司 | Dust nonflame spark arrester |
| CN207316166U (en) * | 2017-08-04 | 2018-05-04 | 江苏爵格工业设备有限公司 | A kind of reusable nonflame bleeder |
-
2017
- 2017-08-04 CN CN201710660514.3A patent/CN107314139B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050725A (en) * | 2006-04-03 | 2007-10-10 | 中国船舶重工集团公司第七一一研究所 | Flow guide anti-explosion valve |
| CN206111335U (en) * | 2016-08-26 | 2017-04-19 | 山东圣力发动机有限公司 | Natural gas engine explosion -proof equipment with back -fire relief function |
| CN206334238U (en) * | 2016-12-30 | 2017-07-18 | 吴江天吴特种安全阀有限公司 | Dust nonflame spark arrester |
| CN207316166U (en) * | 2017-08-04 | 2018-05-04 | 江苏爵格工业设备有限公司 | A kind of reusable nonflame bleeder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107314139A (en) | 2017-11-03 |
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| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 224100 Jiangsu Yancheng City Dafeng Economic Development Zone South of pump valve industrial park Applicant after: JIANGSU DRAGON INDUSTRIAL EQUIPMENT Co.,Ltd. Address before: 224100 Jiangsu Yancheng City Economic Development Zone, south of pump valve industrial park. Applicant before: JIANGSU DRAGON INDUSTRIAL EQUIPMENT Co.,Ltd. |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20200521 Address after: 224000 Building 1, south side of Xinhe Road, valve industrial park, Dafeng Development Zone, Yancheng City, Jiangsu Province Applicant after: Jiangsu juege safety equipment Co.,Ltd. Address before: 224100 South Head of Pump Valve Industrial Park of Dafeng Economic Development Zone, Yancheng City, Jiangsu Province Applicant before: JIANGSU DRAGON INDUSTRIAL EQUIPMENT Co.,Ltd. |
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| TA01 | Transfer of patent application right | ||
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Effective date of registration: 20210125 Address after: 224199 Xikang Road, Dafeng Economic Development Zone, Yancheng City, Jiangsu Province Applicant after: JIANGSU DRAGON INDUSTRIAL EQUIPMENT Co.,Ltd. Address before: 224000 Building 1, south of Xinhe Road, valve industrial park, Dafeng District, Yancheng City, Jiangsu Province Applicant before: Jiangsu juege safety equipment Co.,Ltd. |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 224199 Xikang Road, Dafeng Economic Development Zone, Yancheng City, Jiangsu Province Applicant after: Jiangsu juege Industry Group Co.,Ltd. Address before: 224199 Xikang Road, Dafeng Economic Development Zone, Yancheng City, Jiangsu Province Applicant before: JIANGSU DRAGON INDUSTRIAL EQUIPMENT Co.,Ltd. |
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