CN202049733U - Soundproof panel and soundproof shielding case - Google Patents
Soundproof panel and soundproof shielding case Download PDFInfo
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- CN202049733U CN202049733U CN2010206139000U CN201020613900U CN202049733U CN 202049733 U CN202049733 U CN 202049733U CN 2010206139000 U CN2010206139000 U CN 2010206139000U CN 201020613900 U CN201020613900 U CN 201020613900U CN 202049733 U CN202049733 U CN 202049733U
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Abstract
The soundproof panel provided in the utility model is a cube-shaped case, comprising an integral back wallboard and a foraminiferous right side wallboard, the opposite side surface wallboard is provided with a tongue groove type connector and a tongue groove type connector jack, and the internal space is provided with soundproof material. The ratio of the gross area of the pores on the right side wallboard to the area of the right side wallboard is at least 35%. The invention also includes a soundproof shielding case, comprising at least two vertical columns, and the horizontal cross section is matched to the profile of I-steel. At least one soundproof panel is arranged between the columns and at the gaps of two wings of the I-steel. The soundproof panel is the same to the prior panel, the side surface wallboard possesses an inlet entering the inner space of the soundproof panel, the inner space of the soundproof panel is provided with sound absorbing material, and a panel prepared from rigid material which can bear the influence of the atmosphere environment is used to plug the inlet of the inner space.
Description
Technical field
Content of the present invention relates to the sound insulation panel, and this sound insulation panel has a cube chamber form, and manufactured materials contains inorganic fibre and strengthens magnesia oxychloride cement.The sound insulation radome comprises at least two root posts, and the horizontal section of column and the profile of joist steel adapt, and a sound panel will be installed between column and the joist steel and on the slit of the both wings of joist steel at least.
Background technology
The summary of CA 2661370 inventions has been introduced the noise reduction shielding panel, and the structure with bossy support panel, sound insulation insulant and the sub-thing of fixed insulation that the noise reduction shielding panel is made by thermoplastic material constitutes, and has the front wallboard that has slotted eye.Pugging has damp-proof mineral wool protective seam, and the noise reduction shielding panel is the panel of the relief type made by thermoplastic material basically.Also introduce the sound insulation radome in the summary, which comprises at least two columns and at least one edge and be fixed on panel on these two columns, but do not provided the data of this sound insulation radome effect of assessment in the summary.
Known, Tuplex company produces abatvoix, and it is the structure of the chest formula made with aluminium sheet/sheet, and the rear portion of chest is made up of monoblock aluminium sheet/sheet, and face plane side of a case is by the aluminium sheet manufacturing of boring a hole.Inside at abatvoix has acoustical material, also can rubber blanket as mineral wool.Be coated with any color according to RAL standard surface of aluminum plate.The sound-absorbing of this abatvoix and sound insulation are good especially, but the aluminium sheet mopping has increased the consumption of work workload and material.
The plate of facing the wall and meditating with the manufacturing of sorela cement is also known, is a kind of chest form structure with narrow opening/hole, crack, and the plate the inside of facing the wall and meditating has one deck of insulating material.Make the sound insulation radome with this plate of facing the wall and meditating, sound insulation or erasure effect that can not satisfaction guaranted particularly can not meet the requirement of rules EN1793-1:1997 of European Union and EN 1793-2:1997.
Summary of the invention
Purpose of the present invention is exactly the solution of another kind of sound insulation panel of supply or sound insulation radome.Main energy satisfies country and European high request to the sound insulation protection.The present invention also introduces the using method of sound insulation panel.
The sound insulation panel is strengthened inorganic fibers/cement manufacturing, the box construction illustrated of cube form is arranged by chloride oxygen magnesium, the back face wall of chest formula structure is comprehensive integral body, face wall has the aperture, and glossal canal formula contact maker is installed on the side walls on two opposites of sound insulation panel.This sound insulation panel the inside is placed with quieter material.Characteristics according to invention sound insulation panel are: on the wallboard of front the porose total area total area ratio of whole face wall is at least 35%.Best situation is that this ratio is 42%.State at first is exactly that the aperture total area on the wall of the front ratio that aligns the sidewalls total area is at least 50%.
Best, the inside of sound insulation panel is had at least one root muscle in vain, and particularly one or two root muscle are placed between front and the back, and connects with positive and back, and the rib position is parallel to two side walls.Be preferably in the inlet that the space inside of entering is arranged on two side wall panel of sound insulation panel, between side wall panel and the rib and the inlet of the space inside of entering also arranged between the rib.These can enter the inlet of inner space, stop up with Chinese People's Anti-Japanese Military and Political College's gas rigid material.The most handy plastic plate.Preferably sound insulation panel the inside is between side walls and the rib, between rib and/or the side walls or/and put the acoustical material of one deck at least between the rib.Particularly, inside between side walls and the rib, between rib and the side walls or/and can put two-layer acoustical material between the rib.
Fibrous material and plastic wire one deck of one deck Chinese People's Anti-Japanese Military and Political College gas preferably, are housed on the acoustical material surface from the front wallboard.Particularly, polyolefin nonwovens that does not absorb water or glass fibre manufacturing.Preferably the plastic wire of Shi Yonging better uses the tygon manufacturing by polyolefin.
Preferably the acoustical material of Shi Yonging is by the mat or the plate of mineral wool or glass fibre manufacturing.Particularly, mat or plate that acoustical material is made by mineral wool or glass fibre preferably use density to be 80-85kg/m
3Mineral wool.
The sound insulation panel, preferably the thickness of back sidewalls is the 9-15 millimeter.Preferably, thickness is the 10-12 millimeter.The thickness of back sidewalls that optimum is is 10 millimeter.
The sound insulation panel preferably has 1800-4960 millimeters long, 450-650 mm wide.Preferably, the aperture on the wallboard of front is between side walls and the rib, between rib and the side walls or between the rib.The quantity that the line number in aperture will equal rib adds 1.Aperture on each row neatly distributes, and distance is the same, and the aperture of adjacent different row forms row, and each is listed as between hole and the row homeotropic alignment as far as possible.
Preferably, the open pore of wallboard is a rectangular opening in front, and the distance of closing between the nearest edge of rectangular opening is the 30-100 millimeter.The distance of the rectangular opening that particularly, is positioned at recently is the 40-60 millimeter.Optimum, this distance are 50 millimeters.
Preferably, the sound insulation panel length is the 1800-4960 millimeter, and width is 600 millimeter, have two root muscle and triplex row rectangular opening each for 120-130 millimeter x 230-260 millimeter.Particularly, the sound insulation panel length is the 1800-4960 millimeter, and width is approximately 600 millimeters, and the rectangular opening of two root muscle (7) and three behaviors, 125 * 240 millimeter is arranged.Preferably, the sound insulation plate thickness is the 120-130 millimeter, and deployment is put the two-layer of acoustical material within it, and every layer thickness is 50 millimeters.
Preferably, the thickness of sound insulation panel is 126 millimeter, and its tongue is that 10 millimeters high, 90 mm wides, chamfering are about 60 degree, and its groove can insert the socket of tongue, and the size of socket and chamfering should guarantee enough.Make tongue keep a proper state, after making up, can guarantee the soundproof effect of sound panel with next sound panel with engaging of socket.
Particularly, one deck of net is that 5-10 millimeter * 5-10 millimeter and thickness are that the grid of 1.5-4 millimeter constitutes by mesh size, and is best, and clathrum is to be approximately the grid that 7x7mm net and thickness is about 2.5 millimeters by mesh size to constitute.
The sound insulation radome comprises at least two root posts, and the horizontal section of column and the profile of joist steel adapt to, and a sound panel will be installed between column and the joist steel and on the slit of the both wings of joist steel at least.Characteristics of the present invention are that the sound insulation panel is to strengthen the magnesia oxychloride cement manufacturing, be cubical box structure body with containing inorganic fibre.The back face wall of box structure body is a comprehensively integral body, and face wall has the aperture, device glossal canal formula contact maker on the long side walls in both sides.On short sidewall, has the hole that enters into the sound panel inner space.Sound panel inside has acoustical material, stop up with Chinese People's Anti-Japanese Military and Political College's gas rigid material, preferably plastic plate.
Best, the sound-absorbing of sound insulation shielding is estimated odd number index D L
aPoint out the numerical value of 4dB (decibel) at least, air sound reduction index DL
RBe at least the numerical value of 15dB (decibel).
Particularly, estimate sound-absorbing index D L
aBe at least the numerical value of 8dB (decibel), best, the air sound insulation index D L of sound insulation radome
RBe higher than 24 decibels.Particularly, estimate sound-absorbing index D L
aBe higher than the numerical value of 11dB (decibel), best, the air of sound insulation radome is estimated sound insulation index D L
RBe higher than 29 decibels.
According to explanation of the present invention, above-mentioned sound insulation panel is mainly with making the traffic route next door of sound insulation protective cover position at the big flow of traffic.Especially the position is in the side of highway, highway and through street.Particularly the sound insulation panel uses manufacturing sound insulation radome to be positioned at the place that proposes above.
Evaluation number DL
aThe acoustical absorbance properties that meets sound-absorbing equipment fully, promptly when to around the sound propagated directly relay and do not have the reception of reflecting surface thing or when departing from, the acoustical absorbance properties that shows at the edge of sound insulation shielding and other barrier.Equally, evaluation index coefficient DL
RMeet airborne sound damping fully, promptly the sound in propagating is directly relayed the radome that do not have reflecting surface or when departing from the edge of sound insulation shielding and other barrier, the sound damping that shows.Method of testing and calculating evaluation are seen European standard for details, and " road traffic noise reducing apparatus-definite acoustical behavior test method-part 1: the sound absorption essential characteristic is seen rules EN 1793-1:1997; Part 2: the essential characteristic of sound insulation, see rules EN 1793-2:1997 " and (" Road traffic noise reducing devices-Test method for determining the acoustic performance-Part 1:Intrinsiccharacteristics of sound absorption " EN 1793-1:1997i;, Part 2:Intrinsiccharacteristics of airbone sound sound insulation " EN 1793-2:1997 ").
Surprisingly, solution in the invention can satisfy the high request to the sound insulation of air and sound-absorbing proposition simultaneously, adopted the sound panel of moulding that unique material is made, easy in the solution, this sound panel strengthens the magnesia oxychloride cement manufacturing by containing inorganic fibre.The characteristics of the sound panel among the present invention are that production cost is low, and do not need to take extra protection in atmospheric environment, especially need not take anticorrosive protection.Owing in manufacture process, in the magnesium oxide binding material, added the cured adhesive that strengthens the effect of opposing atmospheric environment, therefore reduced the maintenance cost of sound insulation radome.
Description of drawings
See processing figure of the present invention for details, wherein:
Fig. 1 is the rectangle perspective view that has side walls of the sound panel seen from the front;
Fig. 2 is the A-A sectional view of sound panel;
Fig. 3 is the B-B sectional view of sound panel;
Fig. 4 is the amplification detailed map of the C that obtains according to Fig. 3;
Fig. 5 is sound insulation R[dB] and the graph of relation (1/3 octave band) of frequency f [Hz];
Fig. 6 is sound insulation R[dB] and the graph of relation (1/1 octave band) of frequency f [Hz];
Fig. 7 is sound-absorbing echo coefficient and frequency F[hertz] curve map of (scope 100-4250 hertz);
Fig. 8 is sound-absorbing echo coefficient and frequency F[hertz] curve map of (scope 125-400100 hertz).
Embodiment
In Fig. 1, provided the processing view of the front wallboard 1 of sound panel, and the processing view of side wall panel 2,3,4,5.Front wallboard 1 is a square surface, is processed with many penetrating holes above, can see the packing material of sound panel inside under light by these holes.
Can distribute on the wallboard 1 in front hole of different shape has high soundproof effect in order to guarantee the sound insulation panel, and then the ratio of the whole area of the area summation in the hole on the wallboard of front and front wallboard 1 will have a higher numerical value.
This numerical value will reach 35% at least, is generally more than 42%, is preferably more than 50%.Its job operation sees Fig. 1 for details, and the hole on the wallboard of front is that rectangular opening is wanted the parallel distribution of embarking on journey, until the edge of sound insulation panel.
In Fig. 2, the whole wallboard 6 in the back of sound insulation panel is foundry goods, its size and will the matching with the front wallboard of sound panel 1 of shape.
The sound insulation panel is a rectangular shape basically, wherein on side long limit a tongue is arranged, and opposite side then has the socket that can insert tongue, and tongue and socket see the rectangle perspective view of side wall panel for details.Tongue is the isosceles trapezoid of elongated, a flat hump shape, and the degree of depth of tongue socket is wanted to hold tongue.The size of socket and phasing degree (that is, trapezoidal sidewall slope angle) are such: promptly keep in the joint clearance enough soundproof effects being arranged after putting into tongue.
Tongue and tongue socket are positioned on the sidewall 2 and 4 of sound insulation panel, and sidewall paneling 2 and 4 is complete wallboards, preferably strengthen the thickness of sidewall paneling, to guarantee enough physical strengths.When normal the use, the sidewall paneling 2 and 4 of sound insulation panel is wanted horizontal positioned or level of approximation.
During normal use, the sidewall paneling 3 of sound insulation panel and the sealing of 5 usefulness rigid material panels 13 (seeing sectional view 4) are isolated with atmospheric environment, and the plastics that panel 13 preferably adopts anti-weather to disturb are made, and for example adopt the condition of polyvinyl chloride panel.The panel 13 of the separating atmospheric environment made from rigid material with the inlet of sound insulation panel stifled on, to guarantee the sealing of sound insulation panel, make it obtain the high soundproof effect an of necessity.In principle, the size of the size of the inlet on the sound insulation panel and the xsect of inner space will match, and can enter the inner space by given inlet.
Provided the A-A sectional view on plane in Fig. 2, the sound insulation panel construction among the figure is strengthened in the inner space of rib 7 between front wallboard 1 and back wallboard 6, and is assembled together with front wallboard 1 and back wallboard 6, and is parallel to side walls 2 and 4.Sound insulation panel shown in Figure 2 provides two root muscle 7, and according to invention, the quantity of rib 7 also can be other numerical value, for example can be 1 root muscle.
In by the inner space of the interior surface area of front wallboard 1 and back wallboard 6 decision or in the inner space between the rib 7 or in single rib 7 and side wall panel 2 and 4 inner space between one of them, lay acoustical material, preferably lay two-layer sound-absorbing material layer 8 and 9.Sound-absorbing material layer is generally mat or the plank of being made by glass fibre or mineral wool. Acoustical material 8 and 9 is preferably selected mineral wool for use, and preferred density is 80-85kg/m
3Mineral wool.
The space in the complete filling panel is wanted in the discharging of the acoustical material of sound insulation panel inside, be attached to the back wallboard.The surface of sound-proof material is the insulation course 10 and 11 of anti-atmosphere environment impact, is generally the moisture proof material, preferably selects for use polyolefin or glass fibre to make.
Side from front side wall plate 1 has in surface coverage on the sound-proof material of one deck fibrous material layer 11, and in front on the hole of wallboard 1, lays clathrum made of plastic 12, and grid is generally made with polyolefin plastics, the grid that the most handy tygon is made.
Provide the sound insulation panel among Fig. 3 and got the B-B sectional view, lay sound- proof material 8 and 9 in the inner space of sound insulation panel, the surface of sound-proof material is the fibrous material 10 and 11 of anti-atmosphere environment impact, side from front side wall plate 1, in front on the hole of wallboard 1, and have in surface coverage on the sound-proof material of one deck fibrous material layer 11, lay the clathrum 12 that plastics are made, panel 13 shutoff of the separating atmospheric environment that the sidewall of sound insulation panel is made with rigid material are to guarantee the sound insulation value of sound insulation panel.
Provided the enlarged drawing at the C position among Fig. 3 among Fig. 4.In xsect, the acoustical material 8 that has fibrous material layer 10 is laid in the inside of sound insulation panel, perhaps lays the acoustical material 9 that has fibrous material layer 11.From front side wall plate 1, on sound-absorbing material layer, lay the clathrum 12 that one deck plastics are made.
In order to ensure high performance soundproof effect, the casing of sound insulation panel will keep accurate dimensions during manufacturing.The sound insulation panel is a box cube structure in principle, can not tilt (diagonal line does not wait) or twists.The edge of box body is the right angle basically, fillet can not occur.Two-layer sound absorbing layer 8 and one of them piecemeal of 9 are put into the inside of box sound insulation panel.After the intact sound insulation panel casing of closely knit filling, the closely connected surface of facing the wall and meditating really is critical.Tongue is inserted the tongue combination of outlets lay, after joint was finished, the sound insulation panel on the sound insulation radome will guarantee sealing.
Sound insulation panel length in this invention is that 1800-4960 millimeter, width are the 450-650 millimeter.When the sound insulation panel width near 450 millimeters, then enough lay the case structure that single rib 7 is used to reinforce the sound insulation panel.When the width of sound insulation panel is big, during particularly greater than 550 millimeters, preferably lay two root muscle 7.Especially when the length of sound insulation panel be about 600 millimeters and when laying two root muscle of 1800-4960 millimeter and width, then the thickness of rib 7 should be the 5-10 millimeter.
The thickness of the back wallboard 6 of the sound insulation panel in this invention is the 9-15 millimeter, generally selects the 10-12 millimeter, preferably selects 10 millimeter.The thickness of the front wallboard 1 of sound insulation panel is the 9-20 millimeter, generally selects the 10-15 millimeter, preferably selects 10 millimeter.
The line number that the hole is lined up on the front wallboard 1 of sound insulation panel is bigger by 1 than rib number.Sound insulation panel with a root muscle 7 has two row holes.Sound insulation panel with two root muscle 7 has the triplex row hole.
Regular distribution is wanted in hole on each row, and spacing is identical.The row near normal that the row at place will form with near the hole own.
In the actual scheme implementation, the hole on the wallboard 1 is rectangular hole in front, between the rib 7 or between rib 7 and side wall panel 2 and 4.Between the edge of rectangular opening and side wall panel 2 and 4 or and rib 7 between minimum distance be the 10-50 millimeter.Distance between the edge of rectangular opening (on the limit of delegation) and side wall panel 3 and 5 is the 10-160 millimeter.There is most distance to be 10-80mm.
Distance between every row or the nearest edge of adjacent rectangular opening that whenever lists should be the 30-100 millimeter.This distance is the 40-60 millimeter generally speaking, preferably selects 50 millimeter.Slot on the front wallboard 1 is of a size of 120-130 millimeter * 230-260 millimeter.Slot on the front wallboard 1 is of a size of 125 * 240 millimeter generally speaking, and the distance between every row or the nearest edge of adjacent rectangular opening that whenever lists is 50 millimeters.
The clathrum 12 that tygon is made begins lay from a side of front side wall plate 1, and all wants lay tygon grid on the sound-proof material surface of fibrous material layer 11 on the hole on the wallboard 1 and being coated with in front.The mesh of tygon grid is 5-10mm * 5-10mm, and thickness is the 1.5-4 millimeter, and preferably selecting mesh for use is that 7 millimeters x7 millimeter and thickness are 2.5 millimeters grid.
The thickness of the sound insulation panel that obtains to the outer surface measuring of front wallboard 1 of the outside surface of wallboard 6 is the 120-130 millimeter from behind, preferably selects 126 millimeter.It is 50 millimeters sound- proof material 8 and 9 that the inner thickness of sound insulation panel the inside wants to put down two layers of thickness.For thickness is the sound insulation panel of 126 millimeter, and it is that 90 millimeters, phasing degree are 60 ° that the height of tongue is preferably 10 millimeters, width.The size of tongue socket and phasing degree will guarantee to insert tongue, and guarantee sound insulating seal.
According to the present invention, the use of the casing of sound insulation panel contains inorganic fibre enhancing magnesia oxychloride cement and adjuvant increases anti-atmosphere environment impact manufacturing.
Best, magnesia oxychloride cement is by magnesium oxide MgO and magnesium chloride Mg Cl
2Concentration is the potpourri of the aqueous solution of 25-33%.Reinforcement material is selected inorganic fibre for use, as the artificial inorganic staple fibre, for example, glass fibre, basalt fibre or mineral fibres etc.Adjuvant can be selected inorganic additive for use, as porcelain earth and other silicate, and rauhkalk and the mineral matter that contains magnesium, calcium, flyash.Adjuvant also can be selected organic additive for use, as contains cellulosic vegetable fibre, wood pulp and bamboo pulp etc.
The hardened material adjuvant that strengthens the casing of anti-atmosphere environment impact discloses in No. 95/32929 international application of WO or 5,110, No. 361 patent specification of US.According to magnesian calculating, the content of the compound of magnesium is at least 30% of casing manufactured materials weight in the casing, preferably selects 35% ratio for use; According to magnesian calculating, what the content of the compound of magnesium mostly was casing manufactured materials weight most in the casing selects 45% for use, preferably selects 40% ratio for use.
Sound insulation panel in this invention is mainly used in the sound insulation radome (baffle) of the big highway of traffic main artery, especially vehicle flowrate, through street and highway both sides, and baffle must show corresponding sound insulation and acoustical absorbance properties in air.The test procedure of sound insulation and appraisal procedure see standard P N-EN 1793-2 for details in the air, and the test procedure of sound-absorbing and appraisal procedure see standard P N-EN 1793-1 for details.These two files are translator of English versions of European standard EN 1793-2:1997 and EN 1793-1:1997.
Sound insulation panel in this invention meets the baffle of PN-EN 1793-2 standard, its air sound insulation index coefficient DL
RBe B2 level (15-24dB decibel).Best, air sound insulation index coefficient DL
RBe B3 level (being higher than the 24dB decibel).Sound insulation panel in this invention, as the baffle parts that meet the PN-EN1793-2 evaluation criterion, its air sound insulation index coefficient DL
RBe higher than 29dB (decibel).
Sound insulation panel in this invention meets the baffle parts of PN-EN 1793-1 evaluation criterion, its air sound-absorbing index coefficient DL
aShould be in (4-7dB decibel) in the A2 level range.Generally speaking, air sound-absorbing index coefficient DL
aShould preferably select A4 level range (promptly being higher than the 11dB decibel) for use in (8-11dB decibel) in the A3 level range,
The manufacturing of example 1. sound insulation panels
Casing with case structure is with magnesium oxide binding material (about 25% magnesium chloride Mg Cl
230 parts of weight of 64 parts of weight of solution-by weight, magnesium oxide-by weight), staple glass fibre (2.5 parts of weight portions) that adds in addition and porcelain earth (3 parts of weight) and bamboo pulp (1 part of weight) are mixed the cube structure of vibrations formation.After preliminary sclerosis, the casing that forms was put at ambient temperature to 15 days.Produce the material of casing, be characterized in containing the compound of magnesium, calculate magnesium oxide (MgO) content by weight, then contain magnesium oxide (MgO) 36.5%.
The casing that forms is that a length is that 2050 millimeters, width are that 600 millimeters and thickness are 126 millimeters rectangular shape.Side in the longer edges both sides (length is 2050 millimeters) has a tongue, and wherein opposite side has the socket of a tongue.The height of tongue is that 10 millimeters, width are that 90 millimeters, chamfering are about 60 °.The size of tongue and phasing degree will be satisfied, and can insert tongue, can also guarantee enough sound insulating seals.
The back wallboard of casing is that a thickness is 10 millimeters integral body.The face wall plate thickness is 10 millimeters, has to be of a size of 125 * 240 millimeters slot.Slot divides triplex row into by reinforcement between sound panel front-back wallboard, that be connected to longer both sides, that thickness is the 5-10 millimeter, and rule evenly distributes.On the wallboard, every capable slot has 6 in front, is that 60 millimeters needle beams are separated (total area of being had time on the wallboard of casing front and the ratio of front panel area are 43.9%) by width.The short both sides (edge length is 600 millimeters) of casing are opened wide, conveniently to enter into the space in the casing.
When the processing and fabricating casing, it is 80kg/m that two-layer density is arranged between the casing rib
3Mineral wool, the thickness of every layer of mineral wool is 50 millimeters, will fill up mineral wool between the rib and in the inner space between rib and the longer sidewall paneling of casing, and tamps the wallboard place, back of casing.From the front wallboard of casing, mineral wool surface mount polyolein fiber material layer, placing mesh at the polyolein fiber material layer is that 7 * 7 millimeters and thickness are 2.5 millimeters tygon grid, is used for strengthening and the surface of protection fibrous material (nonwoven cloth material).
After sound-proof material had been laid in the inside of casing, the casing side of opening wide (side that the edge is short) will use the plastic plate shutoff, for example adopts the polyvinyl chloride panel shutoff.
The intact sound insulation panel of processing and fabricating has following sound insulation protective seam and composition:
-have 125x240 millimeters long square opening, and be that 7 * 7 millimeters and thickness are the front wallboard of the polythene net of 2.5mm with the slot covering with mesh.
-one deck polyolein fiber layer (non-weaving cloth)
-one deck density is 80kg/m
3, thickness is 50 millimeters mineral wool layer.
-one deck polyolein fiber layer (non-weaving cloth)
-one deck density is 80kg/m
3, thickness is 50 millimeters mineral wool layer.
-casing back wallboard, the integral body of 10 millimeters thickness.
The processing and manufacturing of example 2. sound insulation panels
It is that a length is that 4960 millimeters, width are that 600 millimeters and thickness are that 126 millimeters cubic shape case closes that the case that given method is made in example 1 closes.Along the longer sides side have glossal canal formula contact maker and glossal canal formula contact maker socket.The height of glossal canal formula contact maker is that 10 millimeters, width are about 60 ° of 90 millimeters, chamfering.The size of glossal canal formula contact maker socket and chamfering will guarantee to insert glossal canal formula contact maker (must consider the rigging error that keeps essential), and can guarantee enough sound insulating seals after order has been assembled sound panel.
Case closes the monoblock wallboard that the back wallboard is 10 millimeters thickness.The face wall plate thickness is 10 millimeters thick, has to be of a size of 125 * 240 millimeters slot.Slot by between the wallboard of the positive back of sound panel, parallel be connected to longer both sides, thickness is that the reinforcement of 5-10 millimeter divides triplex row into, rule evenly distributes.On the wallboard of front, every capable slot has 17, is that 50 millimeters needle beams are separated (ratio that case closes the total area of being had time on the wallboard of front and positive wallboard area is 51.4%) by width.Case closes short both sides (edge length is 600 millimeters) and opens wide, conveniently to enter into the inner space that case closes.
Close at complete case, case closes that two-layer density is arranged between the rib is 85kg/m
3Mineral wool, the thickness of every layer of mineral wool is 50 millimeters, will fill up mineral wool between the rib and in rib and case close inner space between the longer sidewall paneling, and tamp the wallboard place, back that case closes.Case closes the mineral wool surface mount polyolefin nonwovens layer on the wallboard of front, and placing mesh at the polyolefin nonwovens layer is that 7 * 7 millimeters and thickness are 2.5 millimeters tygon grid.
The manufacturing of example 3. sound insulation panels
It is that a length is that 3260 millimeters, width are that 600 millimeters and thickness are that 126 millimeters cubic shape case closes that the case that given method is made in example 1 closes.Along the longer sides side have glossal canal formula contact maker and glossal canal formula contact maker socket.The height of glossal canal formula contact maker is that 10 millimeters, width are about 60 ° of 90 millimeters, chamfering.The size of glossal canal formula contact maker socket and chamfering will guarantee to insert glossal canal formula contact maker (must consider the rigging error that keeps essential), and can guarantee enough sound insulating seals after order has been assembled sound panel.
Case closes the monoblock wallboard that the back wallboard is 10 millimeters thickness.The face wall plate thickness is 10 millimeters thick, has to be of a size of 125 * 240 millimeters slot.Slot by between the wallboard of the positive back of sound panel, parallel be connected to longer both sides, thickness is that the reinforcement of 5-10 millimeter divides triplex row into, rule evenly distributes.On the wallboard of front, every capable slot has 11, is that 50 millimeters needle beams are separated (ratio that case closes the total area of being had time on the wallboard of front and positive wallboard area is 50,6%) by width.Case closes short both sides (edge length is 600 millimeters) and opens wide, conveniently to enter into the inner space that case closes.
Close at complete case, case closes that two-layer density is arranged between the rib is 80kg/m
3Mineral wool, the thickness of every layer of mineral wool is 50 millimeters, will fill up mineral wool between the rib and in rib and case close inner space between the longer sidewall paneling, and tamp the wallboard place, back that case closes.Case closes the mineral wool surface mount polyolefin nonwovens layer on the wallboard of front, and placing mesh at the polyolefin nonwovens layer is that 7 * 7 millimeters and thickness are 2.5 millimeters tygon grid.
Example 4. is handled the sound insulation radome
The sound insulation panel is placed between two columns, and its horizontal section is consistent with the profile of joist steel, and the thickness that distance between the joist steel both wings and sound insulation panel bin close is complementary, and keep essential rigging error and sound insulating seal.The distance of laying of column will be complementary with the size on the long limit of sound panel, and the sound insulation panel is installed between the column, and the sound insulation panel of employing plastic plate shutoff inserts the slit between the joist steel both wings.Order is laid next sound insulation panel on first sound insulation panel of having fixed, and the mode of taking glossal canal formula contact maker to insert glossal canal formula engaging sockets or glossal canal formula contact maker socket insertion glossal canal formula contact maker is installed.One is placed in the quantity of the sound insulation panel on another and the height of sound insulation radome depends on the given baffle or the requirement of traffic route.At the sound insulation radome of finishing, level is answered in the connection of the glossal canal formula contact maker-glossal canal formula engaging sockets mode between the panel continuously.
Test 1: specific acoustical resistance R measures
This test is to carry out in echo (reverberation) chamber that is specifically designed to test architecture material and barrier soundproof effect, it comprises that a chamber interior volume is 178,77 cubic metres pronunciation chamber and a chamber interior volume are 176.9 cubic metres of receiving chambers, and the measured hole connection of one 2 * 1 meters size is passed through in two chambers.The sound insulation panel that is the 1995x600 millimeter with two sizes assembles up composition sound insulation radome by tongue and tongue socket, vertically downcut a sound insulation radome that becomes by two sound insulation panel-mounted along the sound insulation panel, as preparing to carry out the sample that sound damping detects, sample (adopt the sound insulation panel of making in the example 1, Cutting Length to 1995 millimeter) is wanted to put into measured hole.Being placed on the sample that echo (reverberation) chamber of pronunciation chamber and receiving chamber detects in the hole will place like this: the front wallboard of sound insulation panel (porose wallboard) is towards the pronunciation chamber, and the back wallboard of sound insulation panel (wallboard that does not have the hole) is towards receiving chamber.To be that main plasticity putty seals with rubber seal and natural rubber and plastic glue to sample edge and the slit detected between the frame of hole during the sound insulation radome sample in detecting the hole, installed.
The sound insulation of sound insulation radome sample is measured and is finished by measuring system, and measuring system comprises the pronunciation device of the chamber of pronouncing, the monitoring collection of measurement and analytical equipment and measuring process.
This system's carrier has following assembly:
The binary channels frequency analyzer that has noise generator that-NORSONIC RTA840 company produces;
-SOUND KRAK 200VA type power amplifier;
-JBL, Inc. produces is placed in two 2x 150VA loudspeakers in the loudspeaker acoustic enclosure of pronunciation chamber;
-NORSONIC, NN company produces, model is two measurement microphones of 1230, and each microphone all is installed on the The Cloud Terrace of being controlled by PAN TILT controller (automatic rotating machine tool arm), and one of them microphone is positioned at the pronunciation chamber, and another is positioned at receiving chamber;
-NORSONIC company produces, model is two microphone preamplifiers of 1201;
-two have Yamano Y1304M camera lens, model is the industrial camera of JBC-385/12, one of them camera is positioned at the pronunciation chamber, another is positioned at receiving chamber;
-be connected with analyser, video camera, BT-12MC type monochrome display, printer, be used for the computer PC of data recording, processing and storage.
Earlier the noise generator by NORSONIC RTA 840 analysers produces broadband noise (pink noise), then by a power amplifier with have high-level efficiency (about 103 decibels) speaker system and amplify.Guarantee to obtain 113 decibels wave volume in the pronunciation chamber.In measurement, use the 1/3 octave band frequency filter.In additional the measurement, use 1/1 octave band frequency filter.
By measuring the signal of two chambers of microphone record,, control automatically and the position of definite microphone by the continuous monitoring of industrial camera.The signal that sends out from two chambers deliver to two passage analysers simultaneously and use 32 seconds the time chien shih centre plane in each measurement point send a signal.No matter be pronunciation chamber or receiving chamber, carry out sound pressure measurement at five measurement points altogether,, and broadcasting and receiving chamber.Consequent spectrum 1/3 octave band spectrum and 1/1 octave band spectrum are introduced in the PC computing machine.。
After determining the mean value of five spectrum, be 50 hertz in frequency and calculate additional frequency spectrum index coefficient C under sound damping R, sound insulation evaluation index coefficients R w, adaptive spectrum component C and Ctr, the extended frequency range (50-3150Hz, 100-5000Hz and 50-5000Hz) and Ctr and air sound insulation evaluation index coefficient in the 1/3 octave band of 5 hertz of scopes from DL
R
In addition, calculating frequency is 63 hertz to the 4 hertz sound damping R under the octave band in the scope.
The calculating of audio parameter is undertaken by standard P N-EN 20140-3:1999, PN-EN ISO 717-1:1999 and PN-EN 1793-2:2001.
Sound insulation measurement result in the 1/3 octave band
(r-sound damping, f-frequency)
| R[dB] | 251 | 21 | 19.8 | 24.1 | 22.1 | 22.2 | 26.4 | 26.5 | 25.6 | 27.8 | 28.3 |
| f[Hz] | 50 | 63 | 80 | 100 | 125 | 160 | 200 | 250 | 315 | 400 | 500 |
| R[dB] | 31.8 | 36.3 | 37.6 | 38.7 | 39.2 | 38.9 | 40 | 41.3 | 42.7 | 44.5 | |
| f[Hz] | 630 | 800 | 1k | 1.25k | 1.6 |
2k | 2.5k | 3.1 |
4k | 5k |
Sound damping R[dB] relation curve between (1/3 octave band) and the frequency f [Hz] sees Fig. 5 for details.
Sound insulation measurement result in 1/1 octave band
(r-sound damping, f-frequency)
| R[dB] | 20.4 | 22.0 | 25.3 | 29.0 | 37.2 | 38.8 | 42.8 | |
| f[Hz] | 63 | 125 | 250 | 500 | | 2k | 4k |
Sound damping R[dB] relation curve between (1/1 octave band) and the frequency f [Hz] sees Fig. 6 for details.
The index coefficient (according to standard P N EN ISO 717-1{Rw (C, Ctr) } or EN1793-2{DLr}) calculate:
Rw(C；Ctr)＝35(-1，-4)Db：
DL
R＝31dB；
C50-3150＝0dB；
C100-5000＝0dB；
C50-5000＝-1dB；
Ctr，50-3150＝-5dB；
Ctr，100-5000＝-4dB；
Ctr，50-5000＝-5dB。
Test 2: the echo of sound-absorption coefficient is measured
This test is to carry out in echo (reverberation) chamber that is specifically designed to test architecture material and barrier soundproof effect, it comprises that a chamber interior volume is 178,77 cubic metres pronunciation chamber and a chamber interior volume are 176.9 cubic metres of receiving chambers, and the measured hole connection of one 2 * 1 meters size is passed through in two chambers.With sound-proof material measured hole is blocked up, carry out the echo of sound-absorption coefficient and measure.Measurement is that 176.9 cubic metres receiving chamber carries out at volume.
Be that the sound insulation panel of 600 millimeters of 2025x assembles up by glossal canal formula contact maker-glossal canal formula contact maker socket and forms the sound insulation radome with size, vertically downcut a sound insulation radome that is become by two sound insulation panel-mounted along the sound insulation panel, this piece sample area of cutting-out is 10 square metres.In the sample that detects, lay a pillar (HEB 160) according to the relevant requirement that is used for the preparation standard P N-EN 1793-1 of the pillar sample that radome monitors.The sample of the sound insulation radome that is used to detect is a rectangle, fences up with wooden frame all around.The sample of sound insulation radome lies on the floor of echo chamber, and the front wallboard of sound insulation panel (one side with holes) is to the inside (up) of pronunciation chamber, and back wallboard (one side not with holes) is close to the floor.
The sound-absorbing of sound insulation radome sample is measured and is finished by measuring system, and measuring system comprises pronunciation chamber, the monitoring collection of measurement and analytical equipment and measuring process.
This system's carrier has following assembly:
The dual-channel analysis instrument that has the internal noise generator that-NORSONIC RTA840 company produces;
-SOUND KRAK 200VA type power amplifier;
Two 2x150VA loudspeakers that-JBL, Inc. produces;
-NORSONIC, NN company produces, model is two measurement microphones of 1230, each microphone all is installed on the The Cloud Terrace of being controlled by PAN TILT controller (automatic rotating machine tool arm);
-NORSONIC company produces, model is two microphone preamplifiers of 1201;
-two have Yamano Y1304M camera lens, model is the industrial camera of JBC-385/12, one of them camera is positioned at the pronunciation chamber, another is positioned at receiving chamber;
-be connected with analyser, video camera, BT-12MC type monochrome display, printer, be used for the computer PC of data recording, processing and storage.
Detection is carried out at the 1/3 octave band from 100 hertz-5 kilohertz range, the internal noise generator of NORSONIC RTA840 analyser produces broadband noise (pink noise) as measuring-signal, indoor volume is 115 decibels, no matter echo time (is at empty measuring chamber, still at indoor measuring chamber after having laid sound insulation radome sample) adopt following computing method, promptly calculate according to two mean values of measuring and having enough to meet the need (in the above-mentioned situation a kind of) 17 measurement point acquisitions.The echo mean value that obtains is input in the EXCEL table, calculate the sample echo sound-absorption coefficient of sound insulation radome by means of the help of EXCEL table (according to standard P N-EN0354), perhaps (according to standard P N-EN1793-1 and PN-EN 1793-3) calculates sound-absorbing evaluation index coefficient DL
a
Echo sound-absorption coefficient measurement result
(a
s-echo sound-absorption coefficient, the f-frequency)
| a s | 0.45 | 0.62 | 0.82 | 1.02 | 0.98 | 0.9 | 1.05 | 1.01 | 1.03 |
| f[Hz] | 100 | 125 | 160 | 200 | 250 | 315 | 400 | 500 | 630 |
| a s | 1.03 | 1.02 | 0.94 | 0.87 | 0.81 | 0.76 | 0.71 | 0.65 | 0.64 |
| f[Hz] | 800 | 1k | 1.25k | 1.6 |
2k | 3.5k | 3.15 |
4k | 5k |
The mean value of echo sound-absorption coefficient is a
S (on average)=0.85.
Echo sound-absorption coefficient and coefficient of frequency f[hertz] relation curve such as the Fig. 7 of (scope 100-4250 hertz).
Echo sound-absorption coefficient and coefficient of frequency f[hertz] relation curve such as the Fig. 8 of (scope 125-400 hertz).
Sound-absorbing evaluation index coefficient DL
a=11.3dB.
Measurement is that 989.0hPa, environment temperature are that 18 ℃, relative humidity are to measure under 80% the situation at atmospheric pressure.
To test according to act.std, sound insulation radome sample with the sound insulation panel-mounted in this invention, satisfied standard P N-EN 1793-2 to the requirement that B0, B1, B2 and B3 rank limit, perhaps satisfying standard P N-EN 1793-1 is the requirement that A0, A1, A2, A3 and A4 rank limit.
Claims (37)
1. sound insulation panel, described sound insulation panel is that the cube case closes, have the back wallboard (6) of an integral body and have the front wallboard (1) in aperture, glossal canal formula contact maker and glossal canal formula contact maker socket are housed on the side walls (2 and 4) of both sides, sound-proof material is laid in the inner space, it is characterized in that, on the front wallboard (1) the ratio of area of porose area summation and whole front wallboard (1) be at least 35%.
2. sound insulation panel as claimed in claim 1 is characterized in that, on the front wallboard (1) the ratio of area of porose area summation and whole front wallboard (1) be at least 42%.
3. sound insulation panel as claimed in claim 1 is characterized in that, on the front wallboard (1) the ratio of area of porose area summation and whole front wallboard (1) be at least 50%.
4. as each described sound insulation panel in the claim 1 to 3, it is characterized in that, its inner space comprises that especially a root muscle or two root muscle (7) are positioned between front wallboard (1) and the back wallboard (6) at least one root muscle (7), and and front wallboard (1) and back wallboard (6) be assembled together, rib (7) face the wall and meditate with both sides (2,4) parallel.
5. sound insulation panel as claimed in claim 4, it is characterized in that, having between side wall panel of entering into (2,4) and the rib (7) on the side wall panel (3,5) or the inlet of the inner space between the rib (7), this inlet will the shutoff with anti-atmosphere environment impact rigid material plate (13).
6. sound insulation panel as claimed in claim 5 is characterized in that, is having between side wall panel of entering into (2,4) and the rib (7) on the side wall panel (3,5) or the inlet of the inner space between the rib (7), and this inlet will be with plastic plate (13) shutoff.
7. sound insulation panel as claimed in claim 4, it is characterized in that, between side wall panel (2) and rib (7) or/and rib (7) and side wall panel (4) or/and rib (7) and another rib (7) inner space, lay one deck acoustic absorbant (8,9) at least.
8. sound insulation panel as claimed in claim 7 is characterized in that, between wallboard (2) and rib (7) or/and rib (7) and wallboard (4) or/and rib (7) and another rib (7) inner space, places two-layer (8,9) acoustic absorbant.
9. sound insulation panel as claimed in claim 1 is characterized in that, non-woven material (11) and one deck plastic grid material (12) of the additional anti-atmosphere environment impact of one deck on acoustic absorbant (9) surface on the front wallboard (1).
10. sound insulation panel as claimed in claim 9 is characterized in that, the material of non-woven material layer for not absorbing water and making with polyolefin or glass fibre.
11. sound insulation panel as claimed in claim 9 is characterized in that, grid (12) is made by polyolefine material.
12. sound insulation panel as claimed in claim 9 is characterized in that, described grid (12) is made with tygon.
13. sound insulation panel as claimed in claim 1 is characterized in that, mat or the plank of acoustical material for adopting glass fibre or mineral wool to make.
14. sound insulation panel as claimed in claim 1 is characterized in that, it is 80-85kg/m that acoustical material adopts density
3Mineral wool make.
15. sound insulation panel as claimed in claim 1 is characterized in that, the thickness of back wallboard (6) is the 9-15 millimeter.
16. sound insulation panel as claimed in claim 15 is characterized in that, the thickness of back wallboard (6) is the 10-12 millimeter.
17. sound insulation panel as claimed in claim 15 is characterized in that, the thickness of back wallboard (6) is 10 millimeters.
18. sound insulation panel as claimed in claim 1 is characterized in that, the length of sound insulation panel is that 1800-4960 millimeter, width are the 450-650 millimeter.
19. sound insulation panel as claimed in claim 4, it is characterized in that, hole on the front wallboard (1) is positioned between wallboard (2) and rib (7) or/and wallboard (4) and rib (7) or/and rib (7) and another rib (7), and the line number in hole Duos 1 than the quantity of rib (7).
20. sound insulation panel as claimed in claim 19 is characterized in that, the hole on each row is that spacing equates, the rectangle that evenly distributes, and the hole of the relevant position on each row respectively becomes row, and is vertical with the row at place.
21. sound insulation panel as claimed in claim 1 is characterized in that, the hole on the front wallboard (1) is a rectangle, and the distance between the slot edge of nearest vicinity is the 30-100 millimeter.
22. sound insulation panel as claimed in claim 21 is characterized in that, the distance between the nearest bore edges is the 40-60 millimeter.
23. sound insulation panel as claimed in claim 22 is characterized in that, the characteristics of sound insulation panel: the distance between the nearest bore edges is 50 millimeters.
24. sound insulation panel as claimed in claim 21 is characterized in that, its length is that 1800-4960 millimeter, width are 600 millimeters, has two root muscle (7) and 3 row to be of a size of the rectangular opening of 120-130 millimeter * 230-260 millimeter.
25. sound insulation panel as claimed in claim 21 is characterized in that, its length is that 1800-4960 millimeter, width are 600 millimeters, has two root muscle (7) and 3 row to be of a size of 125 millimeters * 240 millimeters rectangular opening.
26. sound insulation panel as claimed in claim 1 is characterized in that, its thickness is the 120-130 millimeter, and two-layer acoustical material (8,9) is laid in the inner space, and every layer thickness is 50 millimeters.
27. sound insulation panel as claimed in claim 1, it is characterized in that, its thickness is 126 millimeters thickness, 10 millimeters of the height of glossal canal formula contact maker, width are that 90 millimeters, chamfering are 60 °, the size of glossal canal formula contact maker socket and chamfering will guarantee to insert glossal canal formula contact maker under the situation of considering the rigging error that keeps essential, and can guarantee enough sound insulating seals after order has been assembled sound panel.
28. sound insulation panel as claimed in claim 11 is characterized in that, clathrum (12) is to be that 5-10 millimeter * 5-10 millimeter, thickness are that the grid of 1.5-4 millimeter is made by mesh size.
29. sound insulation panel as claimed in claim 11 is characterized in that, clathrum (12) is that 7 * 7 millimeters and thickness are that 2.5 millimeters grid is made by mesh size.
30. sound insulation radome, comprise at least two vertical columns, the profile of its corresponding horizontal cross section and joist steel is complementary, a sound insulation panel is being installed between the pillar and between the slit of joist steel both wings at least, it is characterized in that, the sound insulation panel is a cuboidal panel, have a whole back wallboard (6) and front wallboard (1) with holes, side wall panel (2 over there, 4) has the socket of glossal canal formula contact maker and glossal canal formula contact maker, in side wall panel (3, the inlet that can enter sound insulation panel inner space is arranged 5), lay acoustical material in the inner space, enter the mouth with rigid material seal pad (13) shutoff of anti-atmosphere environment impact.
31. sound insulation radome as claimed in claim 30 is characterized in that, the seal pad (13) that the rigid material seal pad (13) of described anti-atmosphere environment impact is made for plastics.
32. sound insulation radome as claimed in claim 30 is characterized in that, the sound-absorbing evaluation number of its one digit number; Sound-absorption coefficient DL
aBe at least 4 decibels.
33. sound insulation radome as claimed in claim 30 is characterized in that, its air sound sound insulation index coefficient DL
RBe at least 15 decibels.
34. sound insulation radome as claimed in claim 30 is characterized in that, the sound-absorbing evaluation index coefficient DL of its one digit number
aBe at least 8 decibels.
35. sound insulation radome as claimed in claim 30 is characterized in that, its air sound sound insulation index coefficient DL
RBe higher than 24 decibels.
36. sound insulation radome as claimed in claim 30 is characterized in that, the sound-absorbing evaluation index coefficient DL of its one digit number
aBe higher than 11 decibels.
37. sound insulation radome as claimed in claim 30 is characterized in that, its air sound sound insulation index coefficient DL
RBe at least 29 decibels.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PLP-392897 | 2010-11-08 | ||
| PL392897A PL392897A1 (en) | 2010-11-08 | 2010-11-08 | Soundproof panel, soundproof screen and the use of the soundproof panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202049733U true CN202049733U (en) | 2011-11-23 |
Family
ID=44990034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206139000U Expired - Fee Related CN202049733U (en) | 2010-11-08 | 2010-11-19 | Soundproof panel and soundproof shielding case |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN202049733U (en) |
| PL (1) | PL392897A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103165124A (en) * | 2011-12-13 | 2013-06-19 | 王筱越 | Plate type silencer |
| CN105951617A (en) * | 2016-05-11 | 2016-09-21 | 刘静 | Multifunctional sound barrier unit |
| CN106854856A (en) * | 2016-12-27 | 2017-06-16 | 中国铁道科学研究院节能环保劳卫研究所 | The reinforced high opening rate panel of railway metal sound barrier |
| CN107299601A (en) * | 2017-07-27 | 2017-10-27 | 江苏新光环保工程有限公司 | A kind of bridge metal sound barrier |
| CN108453617A (en) * | 2018-01-24 | 2018-08-28 | 廊坊京磁精密材料有限公司 | Low noise can go out slot chamfering device automatically |
| CN111332913A (en) * | 2020-03-31 | 2020-06-26 | 瑞普兰德电梯有限公司 | Sound insulation and noise reduction device for elevator car |
| CN116837757A (en) * | 2023-09-01 | 2023-10-03 | 山西军昊实业有限公司 | Externally-hung type totally-enclosed sound barrier for socket type module installation |
-
2010
- 2010-11-08 PL PL392897A patent/PL392897A1/en unknown
- 2010-11-19 CN CN2010206139000U patent/CN202049733U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103165124A (en) * | 2011-12-13 | 2013-06-19 | 王筱越 | Plate type silencer |
| CN105951617A (en) * | 2016-05-11 | 2016-09-21 | 刘静 | Multifunctional sound barrier unit |
| CN106854856A (en) * | 2016-12-27 | 2017-06-16 | 中国铁道科学研究院节能环保劳卫研究所 | The reinforced high opening rate panel of railway metal sound barrier |
| CN107299601A (en) * | 2017-07-27 | 2017-10-27 | 江苏新光环保工程有限公司 | A kind of bridge metal sound barrier |
| CN108453617A (en) * | 2018-01-24 | 2018-08-28 | 廊坊京磁精密材料有限公司 | Low noise can go out slot chamfering device automatically |
| CN111332913A (en) * | 2020-03-31 | 2020-06-26 | 瑞普兰德电梯有限公司 | Sound insulation and noise reduction device for elevator car |
| CN116837757A (en) * | 2023-09-01 | 2023-10-03 | 山西军昊实业有限公司 | Externally-hung type totally-enclosed sound barrier for socket type module installation |
| CN116837757B (en) * | 2023-09-01 | 2023-11-14 | 山西军昊实业有限公司 | Externally-hung type totally-enclosed sound barrier for socket type module installation |
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| Publication number | Publication date |
|---|---|
| PL392897A1 (en) | 2012-05-21 |
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