CN209703765U - One kind can reset venting of dust explosion wall - Google Patents
One kind can reset venting of dust explosion wall Download PDFInfo
- Publication number
- CN209703765U CN209703765U CN201920403985.0U CN201920403985U CN209703765U CN 209703765 U CN209703765 U CN 209703765U CN 201920403985 U CN201920403985 U CN 201920403985U CN 209703765 U CN209703765 U CN 209703765U
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- Prior art keywords
- venting
- dust explosion
- apical ring
- plate
- connector
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- Expired - Fee Related
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- 238000004880 explosion Methods 0.000 title claims abstract description 161
- 238000013022 venting Methods 0.000 title claims abstract description 156
- 239000000428 dust Substances 0.000 title claims abstract description 155
- 239000002184 metal Substances 0.000 claims abstract description 74
- 229910052751 metal Inorganic materials 0.000 claims abstract description 74
- 238000009434 installation Methods 0.000 claims abstract description 12
- 238000004064 recycling Methods 0.000 abstract description 3
- 230000006378 damage Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000009172 bursting Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 125000003003 spiro group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- Connector Housings Or Holding Contact Members (AREA)
Abstract
The utility model relates to venting of dust explosion technical fields, venting of dust explosion wall can be resetted by disclosing one kind, including venting of dust explosion plate, traction strand cable fixing bolt and venting of dust explosion bolt are provided on venting of dust explosion plate, traction strand cable is provided on traction strand cable fixing bolt, the mounting hole for installing venting of dust explosion bolt is preset on venting of dust explosion plate, venting of dust explosion plate outer surface is provided with apical ring, apical ring is made of hard metal, the apical ring is coaxially set with mounting hole, and the internal diameter of apical ring is equal to the internal diameter of mounting hole, the outer diameter of apical ring is less than the outer diameter of metal gasket in venting of dust explosion bolt, venting of dust explosion plate end face is provided with connector and is bolted to connection together, connector one side is hinged with connector two.The utility model, which may be implemented in, to be occurred inside workshop when increased pressure, to avoid the contact surface of venting of dust explosion plate and metal gasket by breakage, to improve the recycling rate of waterused of venting of dust explosion plate, and make venting of dust explosion plate can Rapid reset, the purpose of raising installation speed again.
Description
Technical field
The utility model relates to venting of dust explosion technical fields, in particular to one kind can reset venting of dust explosion wall.
Background technique
Venting of dust explosion wall refers to usually in the civilian workshop boiler room of industry, the lightweight pressure release wall of the applications such as dangerous goods store.It lets out
Usually in 60-90PSF., when explosion or burning occur for Indoor environment, gas pressure steeply rises detonation pressure force value therewith within doors,
Explosion releasing wall is opened wall and is released stress to control the generation of explosion or reach extent of the destruction by venting of dust explosion accessory or device
To minimum.Venting of dust explosion accessory is usually made of venting of dust explosion bolt and traction strand cable, and venting of dust explosion bolt effect quantization venting pressure value dynamic is controlled
System releases stress；Strand cable effect is to restrain the wall splashing opened to hurt sb.'s feelings object.
Existing venting of dust explosion roofing is that venting of dust explosion plate is mounted on purlin by venting of dust explosion bolt, the metal gasket on venting of dust explosion bolt with
The fitting of venting of dust explosion plate upper surface, when workshop internal cause is exploded or other factors cause pressure to sharply increase, internal pressure makes venting of dust explosion plate
Metal gasket is squeezed, obtains internal pressure so that venting of dust explosion plate be made to separate and be detached from venting of dust explosion bolt until metal gasket generates deformation
To directly discharging, plant area is protected, since metal gasket and venting of dust explosion plate use face and face contact, venting of dust explosion plate is caused to squeeze metal gasket
Contact surface and the deformation that venting of dust explosion plate and metal gasket are easily damaged when piece, cause venting of dust explosion plate to be scrapped after venting of dust explosion, can not make again
With the problem of and after venting of dust explosion venting of dust explosion plate need relocate installation, the problem of being more troublesome.
Utility model content
Based on problem above, the utility model, which provides one kind, can reset venting of dust explosion wall.The utility model may be implemented in workshop
Inside is there is a situation where when increased pressure, avoiding the contact surface of venting of dust explosion plate and metal gasket by breakage, to improve venting of dust explosion plate
Recycling rate of waterused, and make venting of dust explosion plate can Rapid reset, improve the purpose of installation speed again.
In order to solve the above technical problems, the technical solution adopted in the utility model is as follows:
One kind can reset venting of dust explosion wall, including venting of dust explosion plate, and traction strand cable fixing bolt and venting of dust explosion bolt are provided on venting of dust explosion plate,
It is provided with traction strand cable on the traction strand cable fixing bolt, the installation for installing venting of dust explosion bolt is preset on the venting of dust explosion plate
Hole, venting of dust explosion plate outer surface are provided with apical ring, and the apical ring is made of hard metal, the apical ring and mounting hole coaxial line
Setting, and the internal diameter of apical ring is equal to the internal diameter of mounting hole, the outer diameter of apical ring is less than the outer diameter of metal gasket in venting of dust explosion bolt, described
Venting of dust explosion plate end face is provided with connector and is bolted to connection together, and the connector one side is hinged with connector two.
In the present invention, traction strand cable bolt is mounted on venting of dust explosion plate when installation, then venting of dust explosion plate is laid on
It is fixedly connected on the first purlin set up and by traction strand cable with the first purlin, is then packed into and lets out into the mounting hole of venting of dust explosion plate
Explosion bolt contradicts the metal gasket of venting of dust explosion bolt and apical ring and connects, then connector two is fixedly mounted on the second purlin,
When workshop internal pressure reaches the setup pressure value of venting of dust explosion bolt, venting of dust explosion plate squeezes metal gasket by apical ring, and makes metal
Gasket generates deformation, and since the contact surface of apical ring and metal gasket is annular, the pressure for causing metal gasket to be subject to concentrates on ring
Shape region, makes metal gasket quickly upwarp deformation, to make venting of dust explosion plate be detached from venting of dust explosion bolt, since connector one is fixedly mounted on
On venting of dust explosion plate, so that venting of dust explosion plate is rotated around the hinge joint of connector one and connector two opens venting of dust explosion mouth, in the work of traction strand cable
It avoids causing venting of dust explosion plate to be detached from because pressure is excessive under, safety effect can be played.
Compared to the prior art, the utility model changes the way of contact of venting of dust explosion plate and metal gasket, is ensureing that installation is steady
It is contacted using apical ring with metal gasket in qualitative situation, venting of dust explosion plate is made to keep completely, improving and repeating to make during disengaging
With rate, and by rotate venting of dust explosion plate can around hinge joint, its position after venting of dust explosion is set not change substantially, raising is installed again
Efficiency.
As a preferred mode, connector one is set as " u "-shaped and coats to be arranged in venting of dust explosion plate end face, the connection
Part two is set as L shape, and its vertical plane is provided with mounting hole.
As a preferred mode, the one side bonding of connector one close to connector two is provided with rubber pad.
As a preferred mode, venting of dust explosion bolt includes screw rod, and the screw rod is arranged with metal sleeve, the metallic sheath
Tube length degree is less than spiro rod length, and the screw rod top, which is arranged with, to be successively threaded with nut and be arranged with and the matched gold of apical ring
Belong to gasket.
As a preferred mode, the outer circumference surface of apical ring is provided with stiffening plate, outer circle of the stiffening plate around apical ring
Be provided in week it is multiple, and the upper surface of the stiffening plate be lower than apical ring upper surface.
As a preferred mode, elastomeric pad is also arranged on screw rod, the elastomeric pad is located at nut and metal
Between gasket.
As a preferred mode, elastomeric pad is bonded using rubber sheet gasket and with metal gasket.
As a preferred mode, metal gasket and elastomeric pad are set as spherical structure, the metal gasket it is recessed
Face and apical ring contradict, and the outer diameter of metal gasket is greater than elastomeric pad outer diameter.
Compared with prior art, the utility model has the beneficial effects that
(1) the utility model compared to the prior art, changes the way of contact of venting of dust explosion plate and metal gasket, installs ensureing
It is contacted using apical ring with metal gasket in the case where stability, venting of dust explosion plate is made to keep completely, improving and repeating during disengaging
Utilization rate, and by rotate venting of dust explosion plate can around hinge joint, so that its position after venting of dust explosion is not changed substantially, realizes in workshop
Inside is there is a situation where when increased pressure, avoiding the contact surface of venting of dust explosion plate and metal gasket by breakage, to improve venting of dust explosion plate
Recycling rate of waterused, and make venting of dust explosion plate can Rapid reset, improve the purpose of installation speed again.
(2) it is set as " u "-shaped and coats to be arranged in venting of dust explosion plate end face, the connection by connector one in the utility model
Part two is set as L shape, and its vertical plane is provided with mounting hole, improves the bonding strength of connector one and venting of dust explosion plate end face,
Use it more stable.
(3) rubber pad is provided with by the one side bonding of connector one close to connector two in the utility model, makes venting of dust explosion
Plate is during venting of dust explosion, and connector one and rubber pad can play sufficient buffering effect when contacting with connector two avoids sending out
The problem of raw sharp impacts lead to damage.
(4) venting of dust explosion bolt includes screw rod in the utility model, and the screw rod is arranged with metal sleeve, the metallic sheath tube length
Degree is less than spiro rod length, and the screw rod top, which is arranged with, to be successively threaded with nut and be arranged with and the matched metal gasket of apical ring
Piece.Metal sleeve is mounted in mounting hole, metal sleeve has the function of anti-energy of bursting, the energy absorption of venting of dust explosion plate can be reduced,
Venting of dust explosion plate is protected, economic loss is reduced.
(5) outer circumference surface of apical ring is provided with stiffening plate in the utility model, and the stiffening plate is set around the excircle of apical ring
Be equipped with it is multiple, and the upper surface of the stiffening plate be lower than apical ring upper surface.Reinforce the company of apical ring and venting of dust explosion plate by stiffening plate
Relationship is connect, so that apical ring is being under pressure and can preferably can be being shared by stiffening plate, venting of dust explosion plate surface is avoided to be damaged.
(6) elastomeric pad is also arranged in the utility model on screw rod, the elastomeric pad is located at nut and metal gasket
Between.Nut avoids pressure is excessive from leading to metal gasket the pressure of metal gasket when may be buffered in installation by elastomeric pad
The problem of damage.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the enlarged structure schematic diagram of part A in the utility model.
Wherein, 1- venting of dust explosion plate, 3- venting of dust explosion bolt, 4- metal sleeve, 5- traction strand cable fixing bolt, 6- draw strand cable, 7-
Screw rod, 8- metal gasket, 9- elastomeric pad, 10- nut, 11- apical ring, 12- stiffening plate, 13- connector one, 14- rubber pad,
15- connector two.
Specific embodiment
The utility model will be further described below with reference to the accompanying drawings.The embodiments of the present invention includes but unlimited
In the following example.
Embodiment 1:
Referring to Fig. 1~2, one kind can reset venting of dust explosion wall, including venting of dust explosion plate 1, and the fixed spiral shell of traction strand cable is provided on venting of dust explosion plate 1
Bolt 5 and venting of dust explosion bolt 3 are provided with traction strand cable 6 on the traction strand cable fixing bolt 5, are preset with and are used on the venting of dust explosion plate 1
The mounting hole 2 of venting of dust explosion bolt 3 is installed, 1 outer surface of venting of dust explosion plate is provided with apical ring 11, and the apical ring 11 uses hard metal system
At the apical ring 11 is coaxially set with mounting hole 2, and the internal diameter of apical ring 11 is equal to the internal diameter of mounting hole 2, the outer diameter of apical ring 11
Less than the outer diameter of metal gasket 8 in venting of dust explosion bolt 3,1 end face of venting of dust explosion plate is provided with connector 1 and is bolted
Connection, the connector 1 have been hinged at connector 2 15.
In the present invention, traction strand cable bolt is mounted on venting of dust explosion plate when installation, then venting of dust explosion plate is laid on
It is fixedly connected on the first purlin set up and by traction strand cable with the first purlin, is then packed into and lets out into the mounting hole of venting of dust explosion plate
Explosion bolt contradicts the metal gasket of venting of dust explosion bolt and apical ring and connects, then connector two is fixedly mounted on the second purlin,
When workshop internal pressure reaches the setup pressure value of venting of dust explosion bolt, venting of dust explosion plate squeezes metal gasket by apical ring, and makes metal
Gasket generates deformation, and since the contact surface of apical ring and metal gasket is annular, the pressure for causing metal gasket to be subject to concentrates on ring
Shape region, makes metal gasket quickly upwarp deformation, to make venting of dust explosion plate be detached from venting of dust explosion bolt, since connector one is fixedly mounted on
On venting of dust explosion plate, so that venting of dust explosion plate is rotated around the hinge joint of connector one and connector two opens venting of dust explosion mouth, in the work of traction strand cable
It avoids causing venting of dust explosion plate to be detached from because pressure is excessive under, safety effect can be played.
Compared to the prior art, the utility model changes the way of contact of venting of dust explosion plate and metal gasket, is ensureing that installation is steady
It is contacted using apical ring with metal gasket in qualitative situation, venting of dust explosion plate is made to keep completely, improving and repeating to make during disengaging
With rate, and by rotate venting of dust explosion plate can around hinge joint, its position after venting of dust explosion is set not change substantially, raising is installed again
Efficiency.
Embodiment 2:
Referring to Fig. 1~2, one kind can reset venting of dust explosion wall, including venting of dust explosion plate 1, and the fixed spiral shell of traction strand cable is provided on venting of dust explosion plate 1
Bolt 5 and venting of dust explosion bolt 3 are provided with traction strand cable 6 on the traction strand cable fixing bolt 5, are preset with and are used on the venting of dust explosion plate 1
The mounting hole 2 of venting of dust explosion bolt 3 is installed, 1 outer surface of venting of dust explosion plate is provided with apical ring 11, and the apical ring 11 uses hard metal system
At the apical ring 11 is coaxially set with mounting hole 2, and the internal diameter of apical ring 11 is equal to the internal diameter of mounting hole 2, the outer diameter of apical ring 11
Less than the outer diameter of metal gasket 8 in venting of dust explosion bolt 3,1 end face of venting of dust explosion plate is provided with connector 1 and is bolted
Connection, the connector 1 have been hinged at connector 2 15.
Connector 1 is set as " u "-shaped and coats to be arranged in 1 end face of venting of dust explosion plate, and the connector 2 15 is set as " L "
Shape, and its vertical plane is provided with mounting hole.
In the present embodiment, it is set as " u "-shaped and coats to be arranged in venting of dust explosion plate end face, the connector two by connector one
It is set as L shape, and its vertical plane is provided with mounting hole, the bonding strength of connector one and venting of dust explosion plate end face is improved, makes it
Using more stable.
As a preferred mode, the one side bonding of connector 1 close to connector 2 15 is provided with rubber pad 14.
In which, rubber pad is provided with by the one side bonding of connector one close to connector two, makes venting of dust explosion plate in the process of venting of dust explosion
In, connector one and rubber pad can play sufficient buffering effect when contacting with connector two avoids sharp impacts occur causing
The problem of damage.
The other parts of the present embodiment are same as Example 1, just repeat no more here.
Embodiment 3:
Referring to Fig. 1~2, one kind can reset venting of dust explosion wall, including venting of dust explosion plate 1, and the fixed spiral shell of traction strand cable is provided on venting of dust explosion plate 1
Bolt 5 and venting of dust explosion bolt 3 are provided with traction strand cable 6 on the traction strand cable fixing bolt 5, are preset with and are used on the venting of dust explosion plate 1
The mounting hole 2 of venting of dust explosion bolt 3 is installed, 1 outer surface of venting of dust explosion plate is provided with apical ring 11, and the apical ring 11 uses hard metal system
At the apical ring 11 is coaxially set with mounting hole 2, and the internal diameter of apical ring 11 is equal to the internal diameter of mounting hole 2, the outer diameter of apical ring 11
Less than the outer diameter of metal gasket 8 in venting of dust explosion bolt 3,1 end face of venting of dust explosion plate is provided with connector 1 and is bolted
Connection, the connector 1 have been hinged at connector 2 15.
Venting of dust explosion bolt 3 includes screw rod 7, and the screw rod 7 is arranged with metal sleeve 4, and 4 length of metal sleeve is less than screw rod
7 length, 7 top of screw rod, which is arranged with, to be successively threaded with nut 10 and is arranged with and the matched metal gasket 8 of apical ring 11.
In the present embodiment, metal sleeve is mounted in mounting hole, metal sleeve has the function of anti-energy of bursting, and can reduce and let out
The energy absorption of plate bursting protects venting of dust explosion plate, reduces economic loss.
As a preferred mode, the outer circumference surface of apical ring 11 is provided with stiffening plate 12, and the stiffening plate 12 is around apical ring
11 be provided with it is multiple, and the upper surface of the stiffening plate 12 be lower than apical ring 11 upper surface.In which, reinforced by stiffening plate
The connection relationship of apical ring and venting of dust explosion plate makes apical ring be under pressure and can preferably can share by stiffening plate, avoids venting of dust explosion plate table
Face is damaged.
As a preferred mode, be also arranged with elastomeric pad 9 on screw rod 7, the elastomeric pad 9 be located at nut 10 with
Between metal gasket 8.In which, nut avoids pressing to the pressure of metal gasket when may be buffered in installation by elastomeric pad
Power excessive the problem of causing metal gasket to damage.
As a preferred mode, elastomeric pad 9 is bonded using rubber sheet gasket and with metal gasket 8.
As a preferred mode, metal gasket 8 and elastomeric pad 9 are set as spherical structure, the metal gasket 8
Concave surface and apical ring 11 contradict, and the outer diameter of metal gasket 8 is greater than 9 outer diameter of elastomeric pad.
It as above is the embodiments of the present invention.Design parameter in above-described embodiment and embodiment is merely to clear
The verification process of the utility model is stated by Chu, not to limit the scope of patent protection of the utility model, the utility model
Scope of patent protection is still subject to the claims, made by all specifications and accompanying drawing content with the utility model
Equivalent structure variation, similarly should be included in the protection scope of the utility model.
Claims (8)
1. one kind can reset venting of dust explosion wall, including venting of dust explosion plate (1), it is provided with traction strand cable fixing bolt (5) on venting of dust explosion plate (1) and lets out
Explosion bolt (3) is provided with traction strand cable (6) on the traction strand cable fixing bolt (5), it is characterised in that: the venting of dust explosion plate (1)
On be preset with mounting hole (2) for installing venting of dust explosion bolt (3), venting of dust explosion plate (1) outer surface is provided with apical ring (11), described
Apical ring (11) is made of hard metal, and the apical ring (11) is coaxially set with mounting hole (2), and the internal diameter etc. of apical ring (11)
Internal diameter in mounting hole (2), the outer diameter of apical ring (11) are less than the outer diameter of metal gasket (8) in venting of dust explosion bolt (3), the venting of dust explosion plate
(1) end face is provided with connector one (13) and is bolted to connection, and the connector one (13) has been hinged at connector
Two (15).
2. according to claim 1 reset venting of dust explosion wall, it is characterised in that: the connector one (13) is set as " u "-shaped
And coat and be arranged in venting of dust explosion plate (1) end face, the connector two (15) is set as L shape, and its vertical plane is provided with installation
Hole.
3. according to claim 2 reset venting of dust explosion wall, it is characterised in that: the connector one (13) is close to connector two
(15) one side bonding is provided with rubber pad (14).
4. according to claim 1 reset venting of dust explosion wall, it is characterised in that: the venting of dust explosion bolt (3) includes screw rod (7),
The screw rod (7) is arranged with metal sleeve (4), and metal sleeve (4) length is less than screw rod (7) length, on the screw rod (7)
Portion, which is arranged with, to be successively threaded with nut (10) and is arranged with and apical ring (11) matched metal gasket (8).
5. according to claim 4 reset venting of dust explosion wall, it is characterised in that: the outer circumference surface of the apical ring (11) is provided with
Stiffening plate (12), the stiffening plate (12) be provided with around apical ring (11) it is multiple, and the upper surface of the stiffening plate (12) lower than top
The upper surface of ring (11).
6. according to claim 5 reset venting of dust explosion wall, it is characterised in that: be also arranged with elastic cushion on the screw rod (7)
Piece (9), the elastomeric pad (9) are located between nut (10) and metal gasket (8).
7. according to claim 6 reset venting of dust explosion wall, it is characterised in that: the elastomeric pad (9) uses rubber sheet gasket
And it is bonded with metal gasket (8).
8. according to claim 7 reset venting of dust explosion wall, it is characterised in that: the metal gasket (8) and elastomeric pad (9)
It is set as spherical structure, the concave surface and apical ring (11) of the metal gasket (8) contradict, and the outer diameter of metal gasket (8) is greater than elasticity
Gasket (9) outer diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920403985.0U CN209703765U (en) | 2019-03-27 | 2019-03-27 | One kind can reset venting of dust explosion wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920403985.0U CN209703765U (en) | 2019-03-27 | 2019-03-27 | One kind can reset venting of dust explosion wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209703765U true CN209703765U (en) | 2019-11-29 |
Family
ID=68647910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920403985.0U Expired - Fee Related CN209703765U (en) | 2019-03-27 | 2019-03-27 | One kind can reset venting of dust explosion wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209703765U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503110A (en) * | 2020-04-23 | 2020-08-07 | 河北远东特种门窗集团有限公司 | Explosion venting bolt and mounting method |
| CN111997423A (en) * | 2020-08-14 | 2020-11-27 | 国网上海市电力公司 | Explosion-proof pressure relief's full indoor steel construction transformer substation owner becomes room |
| CN115743967A (en) * | 2022-11-20 | 2023-03-07 | 南京和本机电设备科技有限公司 | Explosion venting system for energy storage container |
| CN115897828A (en) * | 2022-09-09 | 2023-04-04 | 河南安筑建筑科技有限公司 | Light explosion venting roof with quantitative force value |
-
2019
- 2019-03-27 CN CN201920403985.0U patent/CN209703765U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503110A (en) * | 2020-04-23 | 2020-08-07 | 河北远东特种门窗集团有限公司 | Explosion venting bolt and mounting method |
| CN111997423A (en) * | 2020-08-14 | 2020-11-27 | 国网上海市电力公司 | Explosion-proof pressure relief's full indoor steel construction transformer substation owner becomes room |
| CN115897828A (en) * | 2022-09-09 | 2023-04-04 | 河南安筑建筑科技有限公司 | Light explosion venting roof with quantitative force value |
| CN115743967A (en) * | 2022-11-20 | 2023-03-07 | 南京和本机电设备科技有限公司 | Explosion venting system for energy storage container |
| CN115743967B (en) * | 2022-11-20 | 2024-01-26 | 南京和本机电设备科技有限公司 | Explosion venting system for energy storage container |
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Legal Events
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191129 |
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| CF01 | Termination of patent right due to non-payment of annual fee |