CN2490242Y - Improved structure of noise reduction wallboard - Google Patents
Improved structure of noise reduction wallboard Download PDFInfo
- Publication number
- CN2490242Y CN2490242Y CN 01229341 CN01229341U CN2490242Y CN 2490242 Y CN2490242 Y CN 2490242Y CN 01229341 CN01229341 CN 01229341 CN 01229341 U CN01229341 U CN 01229341U CN 2490242 Y CN2490242 Y CN 2490242Y
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- sound insulation
- noise reduction
- insulation slab
- face
- slab
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Abstract
The utility model relates to an improved structure of a noise reduction wall board, which is provided with a plurality of noise reduction boards formed by that improved integral unit boards are continuously bent and overlapped and arranged between H-shaped channel steels. A side board surface at one side of each of the noise reduction boards is provided with a noise reduction blocking board without noise reduction holes and an overlapping support board which downwards extends, and a noise absorption board surface, a back noise reduction board surface and a middle noise reduction board are provided with round noise reduction holes which are staggeringly arranged. Two end corners between the noise reduction blocking board and the back noise reduction board surface are respectively welded with n-shaped corner seats, the bottom is also welded with long n-shaped corner seats so as to make the noise reduction board surface positioned, and an overlapping noise reduction board is integrally and fixedly formed by a spring fixing clamp, a fixed steel rope and an upper cover to form the noise reduction wall board which is firm and practical and can achieve the purpose of preventing noises.
Description
The utility model provides a kind of noise reduction wallboard, is meant a kind of improved structure of noise reduction wallboard especially.
General place such as the railway both sides that produce noise, road, the tunnel, machinery drill shack etc., all be installed on the source of sound place with sound insulation slab with sound deadening, piled up with most piece sound insulation slabs and to be formed, it offers most bloops on each sound insulation slab, and the aperture of these bloops is for necessarily, and after entering bloop, source of sound will produce a back wave, this back wave will clash into the source of sound of incident simultaneously, to produce vibration and then to produce the repetitiousness compression, and make the power conversion of sound wave become heat energy and absorbed by bloop, and then reaching the effect of noise reduction, this is general so-called noise reduction ability; Owing to may be mingled with height simultaneously in the source of sound, in, low-frequency noise, and the big person in the aperture of bloop on the sound insulation slab, then better to the noise reduction ability of senior middle school's frequency noise, the little person in the aperture of bloop, then better to the noise reduction ability of low and medium frequency noise, this is to have the knack of the basic principle that this skill personage all understands, because existing sound insulation slab only is the plate face of simple layer, when the sound wave of noise touches sound insulation slab, its one-shot noise reduction ability, this for contain big sound can noise (as low frequency noise) for, can't noise reduction effectively fully, that is sound wave is by behind the bloop, the sound that it had can be failed major part and be converted heat energy to, sound can be present in the sound insulation slab and still have partly, causes the vibration of sound insulation slab, and the generation of secondary noise is arranged.
Other has traditional noise prevention, is with the rectangular shutter of majority, in establish the sound insulation material with the energy absorption of sound or block, and sound insulation material type mainly contains the porous sound absorbing body, the panel acoustic(al)absorbent is respectively applied for high frequency and bass blocks.Also there is sound insulation slab to utilize the principle of multiple empty cabin resonance,, controls different resonant frequencies by noise reduction interplanar distance in the sound insulation slab and aperture difference.
Formerly technical, known have No. 82219270 " multilayer sound insulation slab " patent of application case (seeing also Fig. 1, Fig. 2), and Announcement Number 237982 is checked and approved (hereinafter to be referred as checking and approving case) already; It mainly is to adopt to make a circulation to be bent to form most noise reduction faces, and offers the bloop of different varying aperture in noise reduction face.Be re-established as circuitous bending through looking into this " multilayer sound insulation slab " though will have sound insulation slab now, form most noise reduction faces, in fact it have following shortcoming:
1. bending technology is limited: it is limited because of sound insulation slab A bending technology to check and approve case, be more or less the same with height W2 distance difference to check and approve case thickness W1, that is thickness W1 that should majority noise reduction face A1 must will make a circulation to bend and close bending of height W2 spacing, the many noise reduction plate numbers of formation palpus increase carry out stacked, can reach noise reduction face; Only above-mentioned situation is done circuitous bending because of checking and approving case because of height W2 spacing is too small, to cause multilayer sound insulation slab effect to reduce, the utility model patent is lost to the greatest extent completely with kindness and spirit that the multilayer sound insulation slab constitutes, if W2 strengthens with the circuitous bending of majority noise reduction face height, this patent then can't be implemented as checking and approving patent content according to this at the technical of circuitous bending, undoubtedly, its structure certainly will redesign, and obviously prior art is checked and approved case and still had constructional disappearance.
2. the noise reduction effect is hindered in the equal perforate of each noise reduction face: check and approve case " multilayer sound insulation slab " and all have bloop in datum, first, second, third noise reduction face, bending spacer portion, make noise source still can be crossing to other side, only can fall noise slow relatively, and noise also can pass through bending spacer portion bloop, can't reach good erasure effect.
3. the bloop of sound insulation slab is not done planning (that is the size in aperture is clearly specified and arrangement mode), whether has good noise reduction effect, still has many unknown parameters, and the noise reduction effect is had a greatly reduced quality.
4. the plug shortcoming of establishing pad: check and approve case " multilayer sound insulation slab " and fill between datum and the second noise reduction face and establish pad, because pad is established with tight mode plug, palpus carefully on the location.And sound insulation slab piles up the back and can't form up and down smoothly, influences the attractive in appearance of whole erasure effect and noise reduction face.
5. locating rack there is no fastening devices: because the both sides of sound insulation slab are set up locating rack separately, when implementing, there is no fastening devices, make the stacked certain altitude of sound insulation slab, or when forming a metope continuously, be subjected to the influence of natural surroundings (moving) for a long time as typhoon, earthquake, native lycopod, sound insulation slab and locating rack certainly will become flexible crooked causing to be damaged, and truly has the anxiety of safety.
6. the plate face is done the design of bloop, has seen existing sound insulation slab, checks and approves case " multilayer sound insulation slab " though do circuitous bending, does not disclose detailed technology contents such as bloop size, material, and its patent feasibility still has performance difficulty.
7. the structure of checking and approving case " multilayer sound insulation slab " produces shortcoming, this creation looks down and existing one chip sound insulation slab is made circuitous most noise reduction faces that are bent into, office checks and approves patent through an ancient unit of weight, only from application 6 years half so far, still can't application implementation, can't reach novel should be powerful, the many in esse shortcomings of obvious its multilayer sound insulation slab.
The purpose of this utility model is, a kind of improved structure of noise reduction wallboard is provided, and it can effectively prevent noise.
The utility model has a following advantage textural after improveing:
1. the noise reduction wallboard has solid structure: be provided with spring geometrical clamp, fixing tightwire between H type channel-section steel, make the sound insulation slab surface construction solid fixing, can answer the anti-system of actual noise needs.
2. sound insulation slab tool noise reduction effect: sound insulation slab is through the redesign improvement, and one end handicapping baffle-panels and spacer portion plate face are not established bloop, makes the residue sound can so far be stopped and can't penetrate.
3. the sound insulation slab structure really: sound insulation slab therebetween welds burning with Jiong shape angle seat, makes kink plate face be located unlikely oblique.
4. bloop Boulez: sound insulation slab equidistantly is staggered in each plate face, greatly promotes the sound-absorbing and the silencing function of sound insulation slab.
5. sound insulation slab can smoothly be put together: sound insulation slab is in the barrier plate face and stretch down and be provided with stacked backup plate, and sound insulation slab must be folded and lean in group immediately one by one, and the noise reduction metope is able to smooth trimming, and brings into play whole noise reduction and effect attractive in appearance.
6. the spring geometrical clamp is easy to locate sound insulation slab: be positioned between H type channel-section steel from the pressing of sound insulation slab both upper ends thereof with the spring geometrical clamp, it is easy and convenient to construct.Solve prior art with the fixing disappearance of pad.
The improved structure of a kind of noise reduction wallboard of the utility model, its noise reduction wallboard is provided with most stacking gradually with the continuous sound insulation slabs that bend of one upgrading unit plate and is arranged in H type channel-section steel, and, it is characterized in that by spring geometrical clamp, fixing tightwire and the loam cake noise reduction wallboard that stacked sound insulation slab one structure group is fixing:
This sound insulation slab, be to be bent into upright parallel noise reduction orifice plate, one is distolateral be do not have bloop the noise reduction baffle plate and be provided with down and stretch stacked backup plate, this noise reduction baffle plate via first space bar and extend curved be set as source of sound advance the soundboard face, this advances the soundboard face and is provided with mostly to make equidistant staggered noise reduction circular hole with aperture 4mm; Establish second space bar and extend the curved back sound insulation slab face that is set as in abutting connection with advancing the soundboard face, this back sound insulation slab face is in panel and be provided with majority and make equidistant staggered noise reduction circular hole with aperture 3mm; Establish the 3rd space bar and extend sound insulation slab in the middle of curved being set as in abutting connection with back sound insulation slab face, this centre sound insulation slab is in panel and be provided with majority and make equidistant staggered noise reduction circular hole with aperture 2mm; Wherein the plate face both sides of this back sound insulation slab face and middle sound insulation slab and be suitably in contract, the width that makes back sound insulation slab face and middle sound insulation slab is than the noise reduction baffle plate and to advance the soundboard face be little, wears the interference that produced to avoid fixing tightwire; Its both upper ends thereof angle and each weldering have a Jiong type angle seat between this noise reduction baffle plate and back sound insulation slab face, also weld in the bottom and have a rectangular Jiong type angle seat, with sound insulation slab and back sound insulation slab face and barrier plate face in the middle of the maintenance location; This first space bar and second space bar have perforation in both ends;
This H type channel-section steel, its upper and lower end has some perforation that wear as fixing tightwire;
This spring geometrical clamp, be that pressing is arranged in each sound insulation slab in the both upper ends thereof bight, it is corresponding with first space bar and second space bar of sound insulation slab that one end seat surface has circular hole, its in addition end be gradient bending folder and sound insulation slab produced closely with H type channel-section steel spacing fix; Wherein the noise reduction wallboard is provided with the spring geometrical clamp in addition in the sound insulation slab bottom of bottommost and fixes;
This fixing tightwire, be to wear with a fixing tightwire to close in the perforation of each H type channel-section steel upper end, two ends screw togather with nut, and in each stacked sound insulation slab in adjacent H type channel-section steel both sides with fixing tightwire via perforation around, link both ends with holding ﹠ forming knot, make stacked sound insulation slab be able to firm formation one noise reduction metope.
Wherein the middle sound insulation slab of this sound insulation slab is the bending five equilibrium in the spacing of advancing between soundboard face and back sound insulation slab face, this noise reduction baffle plate and spacing between the sound insulation slab face of back be slightly larger than middle sound insulation slab separate soundboard face into and after spacing between the sound insulation slab face.
Wherein this sound insulation slab is arranged in noise reduction wallboard bottom and must establish stacked backup plate.
Wherein this noise reduction wallboard is provided with the spring geometrical clamp in addition in the sound insulation slab bottom of bottommost and fixes.
Can more detailed clear and definite understanding be arranged to the purpose of this utility model, effect and structural feature by a definite date, see also following graphicly, do further to set forth explanation, the phase makes the auditor that more detailed understanding be arranged; Thought the following stated person, only for explaining preferred embodiment of the present utility model, not being that attempt is done any pro forma restriction to the utility model according to this, is all must be included in the utility model scope following work of identical creation spirit about any modification of the present utility model or change with all.
For making structure of the present utility model disclose its technology contents, feature of the present utility model is described, would like to ask the auditor with reference to following preferred embodiment and cooperate graphicly, be described in detail as follows, wherein:
Fig. 1 is the stereogram of prior art multilayer sound insulation slab;
Fig. 2 is the upright stereogram of prior art multilayer sound insulation slab group;
Fig. 3 is the forward sight combination schematic diagram of the utility model one preferred embodiment;
Fig. 4 is the exploded perspective schematic diagram of the utility model one preferred embodiment;
Fig. 5 is the lateral view of the utility model one preferable enforcement;
Fig. 6 is the local schematic top plan view of the utility model one preferable enforcement;
Fig. 7 is the expansion plan view of the utility model sound insulation slab one preferred embodiment;
Fig. 8 is the lateral view of the utility model sound insulation slab one preferred embodiment;
Fig. 9 is the exploded perspective schematic diagram of the utility model sound insulation slab one preferred embodiment.
Seeing also Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, reaching Fig. 9 is shown in the utility model one preferred embodiment, the improved structure of the utility model noise reduction wallboard, its noise reduction wallboard is provided with most stacking gradually with the continuous sound insulation slabs 1 that bend of one upgrading unit plate and is arranged in H type channel-section steel 2, and by spring geometrical clamp 3, fixing tightwire 4 and loam cake 5 stacked sound insulation slab 1 one structure group is fixed, form and has firm, practical and can reach the noise reduction wallboard that prevents noise;
This sound insulation slab 1 is to be bent into upright parallel noise reduction orifice plate once the redesign modified form, and stacked relatively successively restriction is embedded at and forms the noise reduction wallboard between two H type channel-section steels, 2 conduits; This sound insulation slab 1 one is distolateral to be and not to have a noise reduction baffle plate 11 of bloop, oneself advances soundboard face 12 in regular turn, middle sound insulation slab 14 to the residue sound that back sound insulation slab face 13 is produced can so far be stopped and can't penetrate to make source of sound, its contained sound can be able to be excluded effectively fully and be denial in 1 of sound insulation slab, so the noise reduction ability is splendid; This noise reduction baffle plate 11 via first space bar 111 and extend curved be set as source of sound advance soundboard face 12, this advances soundboard face 12 and is provided with mostly to make equidistant staggered noise reduction circular hole 121 with aperture 4mm, makes noise source be able to import from noise reduction circular hole 121; Again via second space bar 1211 and the curved back sound insulation slab face 13 that is set as of extension, this back sound insulation slab face 13 is in panel and be provided with and most make equidistant staggered noise reduction circular hole 131 with aperture 3mm, when entering noise, middle sound insulation slab 14 is able to direction row change again, noise is slackened, these plate face both sides and be suitably in contract, make the width of back sound insulation slab face 13 advance soundboard face 12, so that fixing tightwire 4 interference problem that produces when wearing for little; Adjacency back sound insulation slab face 13 is via the 3rd space bar 1311 and extend the curved middle sound insulation slab 14 that is set as, this centre sound insulation slab 14 is in panel and be provided with and most make equidistant staggered noise reduction circular hole 141 with aperture 2mm, when advancing is changed direction when soundboard face 12 noise sources of sound enter, and, slacken and reduce the noise audio frequency by middle sound insulation slab 14 resonance effect that produces; Wherein this centre sound insulation slab 14 is spacings that the bending five equilibrium advances soundboard face 12 and 13 in back sound insulation slab face; Sound insulation slab 14 separated to advance the spacing of soundboard face 12 and 13 in back sound insulation slab face in the middle of the spacing that this noise reduction baffle plate 11 and back sound insulation slab face are 13 was slightly larger than; This noise reduction baffle plate 11 also is provided with down and stretches stacked backup plate 15, make sound insulation slab 1 upright when stacked folded one by one leaning on, the noise reduction metope is able to smooth trimming, and makes the noise reduction wallboard bring into play the whole noise reduction effect of generation; For prevent sound insulation slab 1 because of via repeatedly the bending, forcing back sound insulation slab face 13 to incline to a skew back opens, this noise reduction baffle plate 11 and 13 its both upper ends thereof angles of sound insulation slab face, back and each weldering are burnt a Jiong shape angle seat 132 are arranged, also welding burning in the bottom has a rectangular Jiong shape angle seat 133, and sound insulation slab 14 and back sound insulation slab face 13 are kept equidistant with barrier plate face 11 in the middle of making; This first space bar 111 and second space bar 1211 have in both ends the perforation 112, as fixing tightwire 4 wear around; This sound insulation slab 1 is arranged in noise reduction wallboard bottom person and gets and do not establish stacked backup plate 15;
This H type channel-section steel 2, be that noise reduction wall area is according to need established with number H type channel-section steel 2, be located at nearly noise source place pillar, must choose a place to give a banquet plate 21 of its bottom is fixed in Floor base with screw, or lay fixed in ground, 1 stacked supporting is fixed as sound insulation slab, and its upper and lower end has some perforation 22, in order to wearing as fixing tightwire 4; This spring geometrical clamp 3, for spring steel plate is made, it is corresponding with the space bar 111 of sound insulation slab 1 that one end seat surface has circular hole 31, it is held in addition and is gradient bending folder 32, when sound insulation slab 1 is laminated in H type channel-section steel 2, but pressing is arranged in each sound insulation slab 1 in the both upper ends thereof bight, and it is closely fixing by its gradient bending folder 32 sound insulation slab 1 and H type channel-section steel 2 spacings to be produced; It is fixing that wherein the noise reduction wallboard is provided with spring geometrical clamp 3 in addition in sound insulation slab 1 bottom of bottommost;
This fixing tightwire 4, be to wear with a fixing tightwire 4 to close in each H type channel-section steel 2 upper ends perforation 21, screw togather fixing with nut in the outside, H type channel-section steel 2 two ends, in addition in each stacked sound insulation slab 1 in adjacent H type channel-section steel 2 both sides with fixing tightwire 4 via perforation 112 around, link both ends with holding ﹠ forming knot 41, make stacked sound insulation slab 1 be able to firm formation one noise reduction metope;
This loam cake 5 is to be Jiong shape cover cap, is covered on H type channel-section steel 2 tops, makes wallboard formation one and prevents the foreign object intrusion;
The noise reduction wallboard that forms by said elements structure group, when noise via advance soundboard face 12, middle sound insulation slab 14, after the sound insulation slab 1 that is configured to of sound insulation slab face 13 to noise reduction baffle plate 11, be able to source of sound with different audio frequency and absorb gradually and stopped elimination.
By the explanation of above embodiment as can be known, and with the utility model with existing and before checked and approved case and done one relatively, the utlity model has following practical effect when summarizing, and then reach the erasure effect favorable effects.
1. the noise reduction wallboard has solid structure: sound insulation slab 1 is embedded between H type channel-section steel by stacked backup plate 15, fixes with spring geometrical clamp, fixing tightwire in addition, makes the structure of whole noise reduction wallboard solid fixing, can be in response to the anti-system of actual noise.
2. sound insulation slab tool noise reduction effect: sound insulation slab is through the redesign improvement, and one end handicapping baffle-panels and spacer portion plate face are not established bloop, makes the residue sound can so far be stopped and can't penetrate, and greatly promotes sound insulation slab sound-absorbing and silencing function.
3. the sound insulation slab structure really: it is fixed that sound insulation slab therebetween bakes with the weldering of Jiong shape angle seat, makes kink plate face be located unlikely oblique.
4. bloop Boulez: sound insulation slab equidistantly is staggered in each plate face, greatly promotes the effect of sound insulation slab.
5. sound insulation slab is smooth puts together: sound insulation slab is in the barrier plate face and stretch down and be provided with stacked backup plate, and cooperates spring geometrical clamp location, sound insulation slab must be folded in group immediately one by one lean on, and the noise reduction metope is able to smooth trimming, and brings into play whole noise reduction and effect attractive in appearance.
6. the spring geometrical clamp is easy to locate sound insulation slab: be positioned between H type channel-section steel from the pressing of sound insulation slab both upper ends thereof with the spring geometrical clamp, it is easy and convenient to construct.
In sum, the utility model is by the structure design of multilayer noise reduction face and the different varying aperture of each noise reduction face, really the effect and the advantage that have good erasure effect, should meet the condition of applying for a patent: and never see have identical or approximate article to be exposed in the city, so file an application according to the regulation of Patent Law.Only the above person only is a possible embodiments of the present utility model, so use the equivalent structure variation that the utility model manual and claim are done such as, ought to be included in the claim of the present utility model.
Claims (4)
1. the improved structure of a noise reduction wallboard, its noise reduction wallboard is provided with most stacking gradually with the continuous sound insulation slabs that bend of one upgrading unit plate and is arranged in H type channel-section steel, and, it is characterized in that by spring geometrical clamp, fixing tightwire and the loam cake noise reduction wallboard that stacked sound insulation slab one structure group is fixing:
This sound insulation slab, be to be bent into upright parallel noise reduction orifice plate, one is distolateral be do not have bloop the noise reduction baffle plate and be provided with down and stretch stacked backup plate, this noise reduction baffle plate via first space bar and extend curved be set as source of sound advance the soundboard face, this advances the soundboard face and is provided with mostly to make equidistant staggered noise reduction circular hole with aperture 4mm; Establish second space bar and extend the curved back sound insulation slab face that is set as in abutting connection with advancing the soundboard face, this back sound insulation slab face is in panel and be provided with majority and make equidistant staggered noise reduction circular hole with aperture 3mm; Establish the 3rd space bar and extend sound insulation slab in the middle of curved being set as in abutting connection with back sound insulation slab face, this centre sound insulation slab is in panel and be provided with majority and make equidistant staggered noise reduction circular hole with aperture 2mm; Wherein the plate face both sides of this back sound insulation slab face and middle sound insulation slab and be suitably in contract, the width that makes back sound insulation slab face and middle sound insulation slab is than the noise reduction baffle plate and to advance the soundboard face be little, wears the interference that produced to avoid fixing tightwire; Its both upper ends thereof angle and each weldering have a Jiong type angle seat between this noise reduction baffle plate and back sound insulation slab face, also weld in the bottom and have a rectangular Jiong type angle seat, with sound insulation slab and back sound insulation slab face and barrier plate face in the middle of the maintenance location; This first space bar and second space bar have perforation in both ends;
This H type channel-section steel, its upper and lower end has some perforation that wear as fixing tightwire;
This spring geometrical clamp, be that pressing is arranged in each sound insulation slab in the both upper ends thereof bight, it is corresponding with first space bar and second space bar of sound insulation slab that one end seat surface has circular hole, its in addition end be gradient bending folder and sound insulation slab produced closely with H type channel-section steel spacing fix; Wherein the noise reduction wallboard is provided with the spring geometrical clamp in addition in the sound insulation slab bottom of bottommost and fixes;
This fixing tightwire, be to wear with a fixing tightwire to close in the perforation of each H type channel-section steel upper end, two ends screw togather with nut, and in each stacked sound insulation slab in adjacent H type channel-section steel both sides with fixing tightwire via perforation around, link both ends with holding ﹠ forming knot, make stacked sound insulation slab be able to firm formation one noise reduction metope.
2. according to the improved structure of the described noise reduction wallboard of claim 1, it is characterized in that, wherein the middle sound insulation slab of this sound insulation slab is the bending five equilibrium in the spacing of advancing between soundboard face and back sound insulation slab face, this noise reduction baffle plate and spacing between the sound insulation slab face of back be slightly larger than middle sound insulation slab separate soundboard face into and after spacing between the sound insulation slab face.
3. according to the improved structure of the described noise reduction wallboard of claim 1, it is characterized in that wherein this sound insulation slab is arranged in noise reduction wallboard bottom and must establish stacked backup plate.
4. according to the improved structure of the described noise reduction wallboard of claim 1, it is characterized in that wherein this noise reduction wallboard is provided with the spring geometrical clamp in addition in the sound insulation slab bottom of bottommost and fixes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01229341 CN2490242Y (en) | 2001-06-28 | 2001-06-28 | Improved structure of noise reduction wallboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01229341 CN2490242Y (en) | 2001-06-28 | 2001-06-28 | Improved structure of noise reduction wallboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2490242Y true CN2490242Y (en) | 2002-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01229341 Expired - Fee Related CN2490242Y (en) | 2001-06-28 | 2001-06-28 | Improved structure of noise reduction wallboard |
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| Country | Link |
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| CN (1) | CN2490242Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100019A (en) * | 2014-07-08 | 2014-10-15 | 长兴百叶龙演出有限公司 | Equipment subassembly for improving sound effects in theater |
| CN104594645A (en) * | 2015-01-15 | 2015-05-06 | 庄学阳 | Wall panel fixing piece, fixing rack comprising same and construction method |
| CN106968356A (en) * | 2017-04-21 | 2017-07-21 | 上海赛菲环境科技股份有限公司 | A kind of noise reduction noise-decreasing device |
| CN108049512A (en) * | 2017-12-21 | 2018-05-18 | 重庆亭航装饰材料有限公司 | Wooden abatvoix |
-
2001
- 2001-06-28 CN CN 01229341 patent/CN2490242Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100019A (en) * | 2014-07-08 | 2014-10-15 | 长兴百叶龙演出有限公司 | Equipment subassembly for improving sound effects in theater |
| CN104100019B (en) * | 2014-07-08 | 2016-03-23 | 长兴百叶龙演出有限公司 | A kind of apparatus assembly for promoting audio in arenas |
| CN104594645A (en) * | 2015-01-15 | 2015-05-06 | 庄学阳 | Wall panel fixing piece, fixing rack comprising same and construction method |
| CN106968356A (en) * | 2017-04-21 | 2017-07-21 | 上海赛菲环境科技股份有限公司 | A kind of noise reduction noise-decreasing device |
| CN108049512A (en) * | 2017-12-21 | 2018-05-18 | 重庆亭航装饰材料有限公司 | Wooden abatvoix |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |