CN203309386U - Compound insulating soundproof pipeline - Google Patents
Compound insulating soundproof pipeline Download PDFInfo
- Publication number
- CN203309386U CN203309386U CN2013202181411U CN201320218141U CN203309386U CN 203309386 U CN203309386 U CN 203309386U CN 2013202181411 U CN2013202181411 U CN 2013202181411U CN 201320218141 U CN201320218141 U CN 201320218141U CN 203309386 U CN203309386 U CN 203309386U
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- Prior art keywords
- pipeline
- preservation
- sound
- inner tube
- rubber pad
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- Expired - Lifetime
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- 150000001875 compounds Chemical class 0.000 title abstract 7
- 229920001971 elastomer Polymers 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 34
- 238000010521 absorption reaction Methods 0.000 claims abstract description 23
- 238000013016 damping Methods 0.000 claims abstract description 21
- 238000002955 isolation Methods 0.000 claims abstract description 6
- 239000007769 metal material Substances 0.000 claims abstract description 6
- 230000010287 polarization Effects 0.000 claims description 38
- 238000009413 insulation Methods 0.000 claims description 34
- 238000004321 preservation Methods 0.000 claims description 33
- 239000011810 insulating material Substances 0.000 claims description 19
- 238000010079 rubber tapping Methods 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000012528 membrane Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 17
- 239000002184 metal Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 239000011490 mineral wool Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229920000784 Nomex Polymers 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 239000011491 glass wool Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000004763 nomex Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920001084 poly(chloroprene) Polymers 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- NTXGQCSETZTARF-UHFFFAOYSA-N buta-1,3-diene;prop-2-enenitrile Chemical compound C=CC=C.C=CC#N NTXGQCSETZTARF-UHFFFAOYSA-N 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000035479 physiological effects, processes and functions Effects 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
The utility model relates to a compound insulating soundproof pipeline. The compound insulating soundproof pipeline comprises an inner pipe, an outer pipe and a plurality of vibration-isolation rubber pads. The inner pipe comprises an annular insulating sound-absorption material and annular rigid airtight membranes arranged inside and outside the insulating sound-absorption material respectively. The outer pipe is made of metal materials, and damping soundproof materials are bonded to the inner wall of the outer pipe. The vibration-isolation rubber pads are arranged between the inner pipe and the outer pipe in the circumferential direction and the axial direction in a spaced mode, so that an air pipeline layer is formed between the inner pipe and the outer pipe. Compared with the structure of an existing pipeline, on the premise that the diameter of the existing pipeline is equal to that of the compound insulating soundproof pipeline, materials used for manufacturing the compound insulating soundproof pipeline are wider in range of selection, and the compound insulating soundproof pipeline is better in sound isolation performance, and is especially obvious in effect of isolating sounds in the medium-frequency band and the low-frequency band. The compound insulating soundproof pipeline can be widely applied to governance of pipeline noise in various of plants.
Description
Technical field
The utility model relates to a kind of pipeline, particularly about a kind of be used to transmitting the complex heat-preservation sound insulation pipeline of high temperature and high pressure steam.
Background technique
Duct noise is permitted one of noise source common in eurypalynous industrial building.Due to pipeline itself, pipeline outer wall remains an important acoustic energy radiator at the far place of the device of disembarking.Self-evident, pipeline radiation sound property is followed the line source rule, and in free field, sound pressure level is 3dB with the respective attenuation value that distance doubles, rather than 6dB.Therefore, the duct noise of handling well in industrial building has important practical significance for improving whole acoustic environment in factory building.The reason that duct noise produces has two: the regenerated noise that the first is produced by impact, friction, elbow, valve and other reducing places of high-temperature high-speed airflow in pipe-line system; The 2nd, machine body vibrational excitation tube wall vibrates and the noise of radiation.Though pipeline itself has certain noise insulation factor, because tube wall is all thinner, make manage interior noise transmission and radiate.In order to increase the noise insulation factor of pipeline, can adopt the method for pipeline outer wall wrapping sound insulating material.Simultaneously, pipeline wrapping should be considered heat insulation and sound absorption, thereby often selects the sound-absorbing materials such as glass wool, slag wool, rock wool, foamed plastics as internal layer; Adopt the airtight diaphragms such as polyvinyl chloride plastic flitch of sheet metal, neoprene rubber sheet, subsides lead as skin.But, traditional pipe insulation sound insulation binding structure for binding usually has following problem: 1, binding structure for binding is too simple, is usually the combination of airtight film sheet and sound-absorbing porous material, from the sound insulation angle, this class formation belongs to the individual layer composite structure, and the low frequency sound insulation property of itself is poor; 2, can't solve the solid-borne sound transmission problem, because binding structure for binding closely is connected with pipeline body, in pipeline, pneumatic noise or machine body vibrational excitation tube wall cause resonance, and then drive the binding structure for binding vibration, thereby produce the secondary radiation noise.
According to the study, the sound insulation property of homogeneous single layer structure is followed mass law basically, its thickness is being increased while being twice, and noise insulation factor improves about 5dB.If do not take to strengthen the way of thickness, and discrete both of original thickness, in the middle of forming, contain the double layer construction of certain air layer, the noise insulation factor now obtained is more much bigger than 5dB, so the double layer construction tool has an enormous advantage.But double layer construction can produce coincidence effect, its threshold frequency depends on two separate structures threshold frequency separately, and when identical in quality, two threshold frequencies are identical when two-layer, on the sound insulation characteristics curve, will produce the low valley that coincide; When the quality of two separate structures is different, the sound insulation characteristics curve will have two low ebbs, but the degree of depth of depression is more shallow.But double layer construction can not independently exist, and needs some structure to support.Therefore, inevitably can produce the overhead speaker effect, thereby cause the decline of noise insulation factor, the rigidity of overhead speaker is larger, and noise insulation factor descends also just more.
Summary of the invention
For the problems referred to above, the utility model provides a kind of complex heat-preservation sound insulation pipeline that can improve the low-frequency range sound insulation property and solve the solid-borne sound transmission problem.
For achieving the above object, the utility model is taked following technological scheme: a kind of complex heat-preservation sound insulation pipeline, and it is characterized in that: it comprises an inner tube, an outer tube and some partiting polarization rubber pads; Described inner tube comprises the heat-preservation and sound-absorption material of an annular and is separately positioned on the inside and outside airtight diaphragm of an annular rigidity of described heat-preservation and sound-absorption material; Described outer tube adopts metallic material to make, and on described outer tube wall, is pasted with the damping sound insulating material; Spaced described partiting polarization rubber pad on circumferential and axial between described inner tube and described outer tube, thus an air conduit layer between described inner and outer tubes, formed.
The airtight diaphragm of inside and outside two annular rigidity of described inner tube, stick on respectively on described heat-preservation and sound-absorption material inside and outside wall, and the jointing of the airtight diaphragm of described inside and outside rigidity adopts a kind of mode in overlap joint and interlock, and is integral with a kind of being fixedly connected with in rivet by bolt.
Described partiting polarization rubber pad is bonded in described outer wall of inner tube by high temperature resistant quick-acting binder.
On described partiting polarization rubber pad, be provided with blind hole, be provided with tapping screw in described blind hole, described tapping screw is screwed into described partiting polarization rubber pad and inner tube, and described partiting polarization rubber pad is fixed on described inner tube.
The damping sound insulating material of described outer tube wall adopts self-adhesive and a kind of of tackiness agent to paste on described outer tube wall.
The thickness of the heat-preservation and sound-absorption material in described inner tube is 100mm～150mm, and described damping sound insulating material layer thickness is 2mm～3mm, and described vibration isolation rubber mat thickness is 50mm～100mm, and the distance of adjacent described partiting polarization rubber pad is greater than 600mm.
The utility model is owing to taking above technological scheme, it has the following advantages: 1, the utility model due to the heat-preservation and sound-absorption material that adopts the airtight diaphragm parcel of inside and outside two-layer rigidity as the pipeline inner tube, adopt metallic material to make outer tube, spaced some partiting polarization rubber pads between inner and outer pipe, thereby form an air conduit layer, therefore when sound wave is injected the heat-preservation and sound-absorption material and is transmitted to air layer, the generation elasticity shape of air, promoted the sound insulation anti-vibration performance of pipeline effectively.2, the utility model is pasted the damping sound insulating material at the inwall of pipeline outer tube; when inwall is protected; further improved sealing and the damping characteristic of integrated piping, effectively prevented and farthest completely cut off to fall machine and the caused pipe vibration of pipe gas flow noise.3, the utility model, on existing pipeline configuration basis, has only reduced the diameter of inner tube, and adds and be provided with partiting polarization rubber pad between inner and outer pipe, and therefore in transformation project, construction process is simple, saves cost of material.4, the utility model is compared with existing pipeline configuration, under same pipe diameter, manufactures Pipe material selection wider, and the pipeline sound insulation property is better, and particularly the defening effect in the medium and low frequency section is obvious.The utility model can be widely used in the improvement of each large type factory building interior conduit noise.
The accompanying drawing explanation
Fig. 1 is cross-section of the present utility model schematic diagram
Fig. 2 is longitudinal section schematic diagram of the present utility model
Fig. 3 is the longitudinal section schematic diagram of partiting polarization rubber pad in the utility model
Fig. 4 is the cross-section schematic diagram of partiting polarization rubber pad in the utility model
Fig. 5 is the cross-section schematic diagram of prior art in embodiment 1
Fig. 6 is cross-section of the present utility model schematic diagram in embodiment 1
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail.
As shown in Figure 1 and Figure 2, the utility model comprises an inner tube 1, an outer tube 2 and some partiting polarization rubber pads 3.
In above-described embodiment, partiting polarization rubber pad 3 can be uniformly distributed on the pipeline cross-section, and distance is arranged at certain intervals on the pipeline longitudinal section, and the span on longitudinal section can be identical, also can be variant.
Making method step of the present utility model is as follows:
1) heat-preservation and sound-absorption material 11 sticks between two airtight diaphragms 12 of rigidity by tackiness agent, the airtight diaphragm 12 of two rigidity that makes to have heat-preservation and sound-absorption material 11 by the die mould processing method again forms a ring, the jointing of the airtight diaphragm 12 of inside and outside rigidity adopts overlap joint or interlock, and fixes by bolt or rivet.
Wherein, according to the difference of temperature in pipeline, heat-preservation and sound-absorption material 11 can be one or more the combination in glass wool, rock wool, aluminosilicate material, calcium silicate material; The thickness of heat-preservation and sound-absorption material 11 need carry out computer simulation and calculating according to true temperature in thermal conductivity, material suggestion Applicable temperature and the pipeline of known material, carries out simultaneously experimental verification.The thickness of heat-preservation and sound-absorption material 11 is often elected 100mm～150mm as.
2) each partiting polarization rubber pad 3 is arranged in to inner tube 1 surrounding, and is fixed on inner tube 1 outer wall.
Wherein, fixing can the adopting in two ways between partiting polarization rubber pad 3 and inner tube 1: 1) utilize high temperature resistant quick-acting binder bonding; 2) on partiting polarization rubber pad 3, beat blind hole 31(as shown in Figure 3, Figure 4), with tapping screw, penetrate blind hole 31, and tapping screw is screwed into to 8 partiting polarization rubber pads 3 and inner tube 1, partiting polarization rubber pad 3 is fixed on inner tube 1.The material of partiting polarization rubber pad 3 is selected according to the temperature in air layer 6, and common used material is butadiene acrylonitrile rubber, neoprene, silica gel etc.Partiting polarization rubber pad 3 material requires have that intensity is high, the easy characteristic such as bonding in good-extensibility, good weatherability, physiology inertia, free from extraneous odour and metal surface.Partiting polarization rubber pad 3 thickness are chosen as 50mm～100mm; On air conduit layer 4 longitudinal section, the distance of adjacent partiting polarization rubber pad 3 should not be less than 600mm.
3) by bonding outer tube 2 inwalls of damping sound insulating material 21.
Wherein, damping sound insulating material 21 thickness are 2mm～3mm; Damping sound insulating material 6 is divided into the self-adhesive type and without two kinds, self-adhesive type.When selecting self-adhesion than type damping sound insulating material 21, can directly damping sound insulating material 21 directly be sticked on the sheet metal of making outer tube 2; When selecting without self-adhesive type damping sound insulating material 21, need smear tackiness agent at damping sound insulating material 21 surface uniforms, then bonding with the sheet metal of making outer tube 2.The material of sheet metal can be that the metallic material such as steel, iron, copper are made.
4) will be through step 2) in the inner tube with partiting polarization rubber pad 31 of making, be placed in step 3) with place in the middle of damping sound insulating material 21 sheet metals, the sheet metal that makes to make outer tube 2 by the die mould processing method forms ring, and be around in the periphery of each partiting polarization rubber pad 3, and, after the jointing that sheet metal is made adopts overlap joint or interlock, fix by bolt or rivet.
As shown in Figure 5, be below the comparative example of a present invention and prior art.
The heat-preservation and sound-absorption material 11 of existing pipeline configuration is selected the alumina silicate Nomex, and thickness is 190mm, and the thickness of the airtight diaphragm 5 of rigidity is 0.75mm;
The heat-preservation and sound-absorption material 11 of the utility model structure is selected the alumina silicate Nomex, its thickness is 120mm, the thickness of the airtight diaphragm 5 of rigidity is 0.75mm, owing to having added partiting polarization rubber pad 3, the thickness of the air conduit layer 4 formed is 70mm, and damping sound insulating material 21 adopts the damping sound-insulating felt, and its thickness is 3mm, outer tube 2 adopts steel plate, and its thickness is 0.75mm;
The pipe interior diameter of above-mentioned two kinds of pipeline configurations is identical with the pipeline external diameter, and total thickness and the gross weight of two kinds of pipeline configurations are basically identical.
By existing pipeline configuration and pipeline configuration of the present utility model are carried out to air-borne sound sound insulation experiment, its result following (as shown in table 1):
Table 1: laboratory data contrast table
From above-mentioned data, can find out, the utlity model has better acoustics sound insulation property, especially the defening effect advantage in the medium and low frequency section is remarkable.Simultaneously, calculate through theoretical, the thermal insulation property of thermal insulation property of the present utility model and existing structure is basically identical.
The various embodiments described above are only be used to illustrating the utility model; wherein the structure of each parts, Placement and preparation process etc. all can change to some extent; every equivalents of carrying out on the basis of technical solutions of the utility model and improvement, all should not get rid of outside protection domain of the present utility model.
Claims (9)
1. complex heat-preservation sound insulation pipeline, it is characterized in that: it comprises an inner tube, an outer tube and some partiting polarization rubber pads; Described inner tube comprises the heat-preservation and sound-absorption material of an annular and is separately positioned on the inside and outside airtight diaphragm of an annular rigidity of described heat-preservation and sound-absorption material; Described outer tube adopts metallic material to make, and on described outer tube wall, is pasted with the damping sound insulating material; Spaced described partiting polarization rubber pad on circumferential and axial between described inner tube and described outer tube, thus an air conduit layer between described inner and outer tubes, formed.
2. a kind of complex heat-preservation sound insulation pipeline as claimed in claim 1, it is characterized in that: the airtight diaphragm of inside and outside two annular rigidity of described inner tube, stick on respectively on described heat-preservation and sound-absorption material inside and outside wall, and the jointing of the airtight diaphragm of described inside and outside rigidity adopts a kind of mode in overlap joint and interlock, and is integral with a kind of being fixedly connected with in rivet by bolt.
3. a kind of complex heat-preservation sound insulation pipeline as claimed in claim 1, it is characterized in that: described partiting polarization rubber pad is bonded in described outer wall of inner tube by high temperature resistant quick-acting binder.
4. a kind of complex heat-preservation sound insulation pipeline as claimed in claim 2, it is characterized in that: described partiting polarization rubber pad is bonded in described outer wall of inner tube by high temperature resistant quick-acting binder.
5. a kind of complex heat-preservation sound insulation pipeline as claimed in claim 1, it is characterized in that: be provided with blind hole on described partiting polarization rubber pad, in described blind hole, be provided with tapping screw, described tapping screw is screwed into described partiting polarization rubber pad and inner tube, and described partiting polarization rubber pad is fixed on described inner tube.
6. a kind of complex heat-preservation sound insulation pipeline as claimed in claim 2, it is characterized in that: be provided with blind hole on described partiting polarization rubber pad, in described blind hole, be provided with tapping screw, described tapping screw is screwed into described partiting polarization rubber pad and inner tube, and described partiting polarization rubber pad is fixed on described inner tube.
7. as claim 1 or 2 or 3 or 4 or 5 or 6 described a kind of complex heat-preservation sound insulation pipelines, it is characterized in that: the damping sound insulating material of described outer tube wall adopts self-adhesive and a kind of of tackiness agent to paste on described outer tube wall.
8. as claim 1 or 2 or 3 or 4 or 5 or 6 described a kind of complex heat-preservation sound insulation pipelines, it is characterized in that: the thickness of the heat-preservation and sound-absorption material in described inner tube is 100mm～150mm, described damping sound insulating material layer thickness is 2mm～3mm, described vibration isolation rubber mat thickness is 50mm～100mm, and the distance of adjacent described partiting polarization rubber pad is greater than 600mm.
9. a kind of complex heat-preservation sound insulation pipeline as claimed in claim 7, it is characterized in that: the thickness of the heat-preservation and sound-absorption material in described inner tube is 100mm～150mm, described damping sound insulating material layer thickness is 2mm～3mm, described vibration isolation rubber mat thickness is 50mm～100mm, and the distance of adjacent described partiting polarization rubber pad is greater than 600mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202181411U CN203309386U (en) | 2013-04-26 | 2013-04-26 | Compound insulating soundproof pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202181411U CN203309386U (en) | 2013-04-26 | 2013-04-26 | Compound insulating soundproof pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203309386U true CN203309386U (en) | 2013-11-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202181411U Expired - Lifetime CN203309386U (en) | 2013-04-26 | 2013-04-26 | Compound insulating soundproof pipeline |
Country Status (1)
| Country | Link |
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| CN (1) | CN203309386U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413182A (en) * | 2018-03-10 | 2018-08-17 | 重庆三二绝热制品有限公司 | A kind of pipeline insulation structure |
| CN110043720A (en) * | 2019-03-28 | 2019-07-23 | 北京朗新明环保科技有限公司 | Hollow compound noise-reducing structure for pipeline |
| CN110375123A (en) * | 2019-07-24 | 2019-10-25 | 西北工业大学 | A kind of overstable self-heating pipe conveying fluid |
-
2013
- 2013-04-26 CN CN2013202181411U patent/CN203309386U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413182A (en) * | 2018-03-10 | 2018-08-17 | 重庆三二绝热制品有限公司 | A kind of pipeline insulation structure |
| CN110043720A (en) * | 2019-03-28 | 2019-07-23 | 北京朗新明环保科技有限公司 | Hollow compound noise-reducing structure for pipeline |
| CN110375123A (en) * | 2019-07-24 | 2019-10-25 | 西北工业大学 | A kind of overstable self-heating pipe conveying fluid |
| CN110375123B (en) * | 2019-07-24 | 2021-05-07 | 西北工业大学 | An ultra-stable self-heating flow pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: GUOHUA NING POWER CO., LTD. Effective date: 20131217 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131217 Address after: 102200, 28 Zhenxing Road, Beijing, Changping District Patentee after: Beijing Greentec Acoustics Engineering Co.,Ltd. Patentee after: ZHEJIANG GUOHUA ZHENENG POWER GENERATION Co.,Ltd. Address before: 102200, 28 Zhenxing Road, Beijing, Changping District Patentee before: Beijing Greentec Acoustics Engineering Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131127 |