CN112096975A - Silencing gas conveying pipeline for air purifier - Google Patents

Silencing gas conveying pipeline for air purifier Download PDF

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Publication number
CN112096975A
CN112096975A CN202011056777.1A CN202011056777A CN112096975A CN 112096975 A CN112096975 A CN 112096975A CN 202011056777 A CN202011056777 A CN 202011056777A CN 112096975 A CN112096975 A CN 112096975A
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CN
China
Prior art keywords
layer
sand
air purifier
sand inclusion
gas conveying
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Withdrawn
Application number
CN202011056777.1A
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Chinese (zh)
Inventor
李林龙
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Individual
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Individual
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Priority to CN202011056777.1A priority Critical patent/CN112096975A/en
Publication of CN112096975A publication Critical patent/CN112096975A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/21—Rigid pipes made of sound-absorbing materials or with sound-absorbing structure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/033—Noise absorbers
    • F16L55/0336—Noise absorbers by means of sound-absorbing materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/02—Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/04—Protection of pipes or objects of similar shape against external or internal damage or wear against fire or other external sources of extreme heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • F16L58/10—Coatings characterised by the materials used by rubber or plastics
    • F16L58/1054—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtering Materials (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention discloses a silencing gas conveying pipeline for an air purifier, which comprises a base layer, prismatic raised lines, a sand inclusion layer, an inner layer and silencing holes, wherein a flame-retardant layer is arranged on the outer side of the base layer, a plurality of prismatic raised lines are uniformly distributed on the outer surface of the base layer, a plurality of wedge-shaped grooves are uniformly distributed on the inner wall of the flame-retardant layer, the sand inclusion layer is arranged on the outer side of the flame-retardant layer, a plurality of open grooves are uniformly distributed on the outer surface of the sand inclusion layer, an anti-corrosion layer is arranged on the outer side of the sand inclusion layer, and a plurality of silencing holes are uniformly distributed on. According to the invention, a certain allowance can be reserved for the sand inclusion layer through the arranged open slot, so that the sand inclusion layer is prevented from being influenced by external temperature and from cracking due to stress generated by thermal expansion and cold contraction; the noise generated when air flows can be absorbed through the arranged silencing holes, so that the effects of silencing and reducing noise are achieved; the air can be buffered through the arranged partition plate, the flowing speed of the air is reduced, and the generated noise is reduced.

Description

Silencing gas conveying pipeline for air purifier
Technical Field
The invention belongs to the technical field of air purification, and particularly relates to a silencing gas conveying pipeline for an air purifier.
Background
The air purifier is one equipment for purifying pollutant in air to raise air quality, and the air purifier adopts photocatalyst, active carbon, synthetic fiber,HEPAHigh-efficiency material,Negative ionGenerator etc. air purifier inhales air purifier's inside at first with external air in the use, purifies the back and discharges to the external world again, and air purifier is at the in-process of admitting air and giving vent to anger, because different wind speeds can produce certain noise, and these noises can influence people's life and work, influence people's mood.
Disclosure of Invention
The present invention is directed to a muffling gas delivering pipe for an air purifier, so as to solve the problems of the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a amortization gas transmission pipeline for air purifier, includes basic unit, prism sand grip, sand inclusion layer, inlayer and bloop, the outside of basic unit is provided with fire-retardant layer, and the equipartition is provided with a plurality of prism sand grips on the surface of basic unit, and the equipartition is provided with a plurality of wedge grooves on the inner wall on fire-retardant layer, and the outside on fire-retardant layer is provided with sand inclusion layer, and sand inclusion layer's surface equipartition is provided with a plurality of open slots, and sand inclusion layer's the outside is provided with the anticorrosive coating, and the equipartition is provided with a plurality.
As a further improvement of the above technical solution: the material of fire-retardant layer adopts fire prevention silica gel material, and the material on double-layered sand layer adopts quartz sand and thermosetting resin combined material.
As a further improvement of the above technical solution: the quantity of prismatic sand grip and the quantity of wedge groove are the same, and the prismatic sand grip block is on the wedge groove.
As a further improvement of the above technical solution: be provided with the buffer layer between basic unit and the inlayer, the equipartition is provided with many rubber strips in the buffer layer.
As a further improvement of the above technical solution: the anticorrosive layer is made of epoxy resin anticorrosive material.
As a further improvement of the above technical solution: a plurality of partition plates are arranged inside the inner side, and a plurality of air holes are formed in the partition plates.
As a further improvement of the above technical solution: and a plurality of annular reinforcing ribs are uniformly distributed on the inner wall of the inner side.
Compared with the prior art, the sand inclusion layer can be kept with a certain allowance through the arranged open slot, so that the sand inclusion layer is prevented from being influenced by external temperature and from cracking due to stress generated by thermal expansion and cold contraction; the noise generated when air flows can be absorbed through the arranged silencing holes, so that the effects of silencing and reducing noise are achieved; the air can be buffered through the arranged partition plate, the flowing speed of the air is reduced, and the generated noise is reduced; the strength of the pipeline can be increased through the arranged annular reinforcing rib, so that the pipeline is firmer and more stable; the inner wall of the inner layer is arranged to be of a wave-shaped structure, so that the speed of circulating air can be reduced, and the effects of noise reduction and noise reduction are further achieved; the metal wire through setting up can increase the joint strength between inlayer, buffer layer, basic unit, fire-retardant layer and the sand inclusion layer, makes the pipeline more firm stable.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of a muffling gas conveying pipeline for an air purifier.
Fig. 2 is a schematic structural diagram of a second embodiment of a muffling gas conveying pipeline for an air purifier.
Fig. 3 is a schematic structural diagram of a third embodiment of a muffling gas conveying pipeline for an air purifier.
Fig. 4 is a schematic structural diagram of a fourth embodiment of a muffling gas conveying pipeline for an air purifier.
Fig. 5 is a schematic structural diagram of a fifth embodiment of a muffling gas conveying pipeline for an air purifier.
In the figure: 1. a base layer; 2. a flame retardant layer; 3. prismatic convex strips; 4. a wedge-shaped groove; 5. a sand inclusion layer; 6. an anticorrosive layer; 7. an open slot; 8. an inner layer; 9. a buffer layer; 10. a rubber strip; 11. a silencing hole; 12. a partition plate; 13. air holes are formed; 14. a ring-shaped reinforcing rib; 15. a metal wire.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
The first embodiment is as follows:
referring to fig. 1, a muffling gas conveying pipeline for an air purifier comprises a base layer 1, prismatic convex strips 3, a sand inclusion layer 5, an inner layer 8 and a muffling hole 11, wherein a flame-retardant layer 2 is arranged on the outer side of the base layer 1, the flame-retardant layer 2 is made of a fireproof silica gel material, a plurality of prismatic convex strips 3 are uniformly distributed on the outer surface of the base layer 1, a plurality of wedge-shaped grooves 4 are uniformly distributed on the inner wall of the flame-retardant layer 2, the number of the prismatic convex strips 3 is equal to the number of the wedge-shaped grooves 4, the prismatic convex strips 3 are clamped on the wedge-shaped grooves 4, the sand inclusion layer 5 is arranged on the outer side of the flame-retardant layer 2, the sand inclusion layer 5 is made of a mixed material of quartz sand and thermosetting resin, a plurality of open grooves 7 are uniformly distributed on the outer surface of the sand inclusion layer 5, a certain allowance can be reserved for the sand inclusion layer 5 by arranging the open grooves 7, lead to life to reduce, the outside of double-layered sand bed 5 is provided with anticorrosive coating 6, anticorrosive coating 6's material is epoxy anticorrosive material, anticorrosive ability through anticorrosive coating 6 that sets up can increase the pipeline, prolong the life of pipeline, be provided with buffer layer 9 between basic unit 1 and the inlayer 8, the equipartition is provided with many rubber strip 10 in the buffer layer 9, rubber strip 10 can cushion the external force that the pipeline received, play the guard action to inlayer 8, the equipartition is provided with a plurality of bloops 11 on the inner wall of inlayer 8, the noise that produces when can flowing the air through bloop 11 that sets up absorbs, play the effect of making an uproar of falling the noise elimination.
The working principle of the invention is as follows: can play the cushioning effect to sand inclusion layer 5 through open slot 7 that sets up, prevent that sand inclusion layer 5 from receiving the ambient temperature influence, lead to the inside production stress of pipeline, lead to sand inclusion layer 5 to split easily, when the air circulates in the pipeline, noise that bloop 11 produced the air absorbs.
Example two
As shown in figure 2, a silencing gas conveying pipeline for an air purifier comprises a base layer 1, prismatic raised lines 3, a sand inclusion layer 5, an inner layer 8 and a silencing hole 11, wherein a flame-retardant layer 2 is arranged on the outer side of the base layer 1, the flame-retardant layer 2 is made of a fireproof silica gel material, a plurality of prismatic raised lines 3 are uniformly distributed on the outer surface of the base layer 1, a plurality of wedge-shaped grooves 4 are uniformly distributed on the inner wall of the flame-retardant layer 2, the number of the prismatic raised lines 3 is equal to that of the wedge-shaped grooves 4, the prismatic raised lines 3 are clamped on the wedge-shaped grooves 4, the sand inclusion layer 5 is arranged on the outer side of the flame-retardant layer 2, the sand inclusion layer 5 is made of a mixed material of quartz sand and thermosetting resin, a plurality of open grooves 7 are uniformly distributed on the outer surface of the sand inclusion layer 5, a certain allowance can be reserved for the sand inclusion layer 5 by arranging the open grooves 7, the sand inclusion, lead to life to reduce, the outside of double-layered sand bed 5 is provided with anticorrosive coating 6, anticorrosive coating 6's material is epoxy anticorrosive material, anticorrosive ability through anticorrosive coating 6 that sets up can increase the pipeline, prolong the life of pipeline, be provided with buffer layer 9 between basic unit 1 and the inlayer 8, the equipartition is provided with many rubber strip 10 in the buffer layer 9, rubber strip 10 can cushion the external force that the pipeline received, play the guard action to inlayer 8, the equipartition is provided with a plurality of bloops 11 on the inner wall of inlayer 8, the noise that produces when can flowing the air through bloop 11 that sets up absorbs, play the effect of making an uproar of falling the noise elimination.
Furthermore, a plurality of partition plates 12 are arranged in the inner layer 8, a plurality of air holes 13 are formed in the partition plates 12, air can be buffered through the arranged partition plates 12, the flowing speed of the air is reduced, and the generated noise is reduced.
Example three:
as shown in figure 3, a silencing gas conveying pipeline for an air purifier comprises a base layer 1, prismatic raised lines 3, a sand inclusion layer 5, an inner layer 8 and a silencing hole 11, wherein a flame-retardant layer 2 is arranged on the outer side of the base layer 1, the flame-retardant layer 2 is made of a fireproof silica gel material, a plurality of prismatic raised lines 3 are uniformly distributed on the outer surface of the base layer 1, a plurality of wedge-shaped grooves 4 are uniformly distributed on the inner wall of the flame-retardant layer 2, the number of the prismatic raised lines 3 is equal to that of the wedge-shaped grooves 4, the prismatic raised lines 3 are clamped on the wedge-shaped grooves 4, the sand inclusion layer 5 is arranged on the outer side of the flame-retardant layer 2, the sand inclusion layer 5 is made of a mixed material of quartz sand and thermosetting resin, a plurality of open grooves 7 are uniformly distributed on the outer surface of the sand inclusion layer 5, a certain allowance can be reserved for the sand inclusion layer 5 by arranging the open grooves 7, the sand inclusion, lead to life to reduce, the outside of double-layered sand bed 5 is provided with anticorrosive coating 6, anticorrosive coating 6's material is epoxy anticorrosive material, anticorrosive ability through anticorrosive coating 6 that sets up can increase the pipeline, prolong the life of pipeline, be provided with buffer layer 9 between basic unit 1 and the inlayer 8, the equipartition is provided with many rubber strip 10 in the buffer layer 9, rubber strip 10 can cushion the external force that the pipeline received, play the guard action to inlayer 8, the equipartition is provided with a plurality of bloops 11 on the inner wall of inlayer 8, the noise that produces when can flowing the air through bloop 11 that sets up absorbs, play the effect of making an uproar of falling the noise elimination.
Furthermore, a plurality of partition plates 12 are arranged in the inner layer 8, a plurality of air holes 13 are formed in the partition plates 12, air can be buffered through the arranged partition plates 12, the flowing speed of the air is reduced, and the generated noise is reduced.
Furthermore, a plurality of annular reinforcing ribs 14 are uniformly distributed on the inner wall of the inner layer 8, and the strength of the pipeline can be increased through the arranged annular reinforcing ribs 14, so that the pipeline is firmer and more stable.
Example four:
as shown in figures 1 and 4, the muffling gas conveying pipeline for the air purifier comprises a base layer 1, prismatic convex strips 3, a sand inclusion layer 5, an inner layer 8 and a muffling hole 11, wherein a flame-retardant layer 2 is arranged on the outer side of the base layer 1, the flame-retardant layer 2 is made of a fireproof silica gel material, a plurality of prismatic convex strips 3 are uniformly distributed on the outer surface of the base layer 1, a plurality of wedge-shaped grooves 4 are uniformly distributed on the inner wall of the flame-retardant layer 2, the number of the prismatic convex strips 3 is equal to the number of the wedge-shaped grooves 4, the prismatic convex strips 3 are clamped on the wedge-shaped grooves 4, the sand inclusion layer 5 is arranged on the outer side of the flame-retardant layer 2, the sand inclusion layer 5 is made of a mixed material of quartz sand and thermosetting resin, a plurality of open grooves 7 are uniformly distributed on the outer surface of the sand inclusion layer 5, a certain allowance can be reserved for the sand inclusion layer 5 by arranging the open grooves 7, lead to life to reduce, the outside of double-layered sand bed 5 is provided with anticorrosive coating 6, anticorrosive coating 6's material is epoxy anticorrosive material, anticorrosive ability through anticorrosive coating 6 that sets up can increase the pipeline, prolong the life of pipeline, be provided with buffer layer 9 between basic unit 1 and the inlayer 8, the equipartition is provided with many rubber strip 10 in the buffer layer 9, rubber strip 10 can cushion the external force that the pipeline received, play the guard action to inlayer 8, the equipartition is provided with a plurality of bloops 11 on the inner wall of inlayer 8, the noise that produces when can flowing the air through bloop 11 that sets up absorbs, play the effect of making an uproar of falling the noise elimination.
Further, set up the inner wall of inlayer 8 into wave type structure, can carry out the deceleration to the air of circulation through setting up the inner wall with inlayer 8 into wave type structure, play the effect that the amortization was fallen and is made an uproar.
Example five:
as shown in fig. 1 and 5, a muffling gas conveying pipeline for an air purifier comprises a base layer 1, prismatic convex strips 3, a sand inclusion layer 5, an inner layer 8 and a muffling hole 11, wherein a flame-retardant layer 2 is arranged on the outer side of the base layer 1, the flame-retardant layer 2 is made of a fireproof silica gel material, a plurality of prismatic convex strips 3 are uniformly arranged on the outer surface of the base layer 1, a plurality of wedge-shaped grooves 4 are uniformly arranged on the inner wall of the flame-retardant layer 2, the number of the prismatic convex strips 3 is equal to the number of the wedge-shaped grooves 4, the prismatic convex strips 3 are clamped on the wedge-shaped grooves 4, the sand inclusion layer 5 is arranged on the outer side of the flame-retardant layer 2, the sand inclusion layer 5 is made of a mixed material of quartz sand and thermosetting resin, a plurality of open grooves 7 are uniformly arranged on the outer surface of the sand inclusion layer 5, a certain allowance can be reserved for the sand inclusion layer 5 by arranging the open grooves 7, lead to life to reduce, the outside of double-layered sand bed 5 is provided with anticorrosive coating 6, anticorrosive coating 6's material is epoxy anticorrosive material, anticorrosive ability through anticorrosive coating 6 that sets up can increase the pipeline, prolong the life of pipeline, be provided with buffer layer 9 between basic unit 1 and the inlayer 8, the equipartition is provided with many rubber strip 10 in the buffer layer 9, rubber strip 10 can cushion the external force that the pipeline received, play the guard action to inlayer 8, the equipartition is provided with a plurality of bloops 11 on the inner wall of inlayer 8, the noise that produces when can flowing the air through bloop 11 that sets up absorbs, play the effect of making an uproar of falling the noise elimination.
Further, it is provided with wire 15 to alternate between inlayer 8, buffer layer 9, basic unit 1, fire-retardant layer 2 and the sand inclusion layer 5, can increase the joint strength between inlayer 8, buffer layer 9, basic unit 1, fire-retardant layer 2 and the sand inclusion layer 5 through setting up wire 15, makes the pipeline more firm stable.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

Claims (7)

1. The utility model provides a amortization gas transmission pipeline for air purifier, includes basic unit (1), prism sand grip (3), sand inclusion layer (5), inlayer (8) and bloop (11), its characterized in that, the outside of basic unit (1) is provided with fire-retardant layer (2), and the equipartition is provided with a plurality of prism sand grip (3) on the surface of basic unit (1), and the equipartition is provided with a plurality of wedge groove (4) on the inner wall of fire-retardant layer (2), and the outside of fire-retardant layer (2) is provided with sand inclusion layer (5), and the surface equipartition of sand inclusion layer (5) is provided with a plurality of open slots (7), and the outside of sand inclusion layer (5) is provided with anticorrosive coating (6), and the equipartition is provided with a plurality of bloops (11).
2. The muffling gas conveying pipeline for the air purifier as recited in claim 1, wherein the flame-retardant layer (2) is made of a fireproof silica gel material, and the sand-sandwiched layer (5) is made of a mixture of quartz sand and thermosetting resin.
3. The muffling gas conveying pipe for the air purifier as recited in claim 1, wherein the number of the prismatic ribs (3) is the same as the number of the wedge-shaped grooves (4), and the prismatic ribs (3) are engaged with the wedge-shaped grooves (4).
4. The muffling gas conveying pipeline for the air purifier as recited in claim 1, wherein a buffer layer (9) is disposed between the base layer (1) and the inner layer (8), and a plurality of rubber strips (10) are uniformly distributed in the buffer layer (9).
5. The muffling gas conveying pipeline for the air purifier as recited in claim 1, wherein the corrosion-resistant layer (6) is made of an epoxy resin corrosion-resistant material.
6. The muffling gas conveying pipe for the air purifier as recited in any one of claims 1 to 5, wherein a plurality of partition plates (12) are disposed inside the inner layer (8), and a plurality of vent holes (13) are disposed on the partition plates (12).
7. The muffling gas conveying pipe for the air purifier as recited in claim 6, wherein a plurality of annular reinforcing ribs (14) are uniformly distributed on the inner wall of the inner layer (8).
CN202011056777.1A 2020-09-29 2020-09-29 Silencing gas conveying pipeline for air purifier Withdrawn CN112096975A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011056777.1A CN112096975A (en) 2020-09-29 2020-09-29 Silencing gas conveying pipeline for air purifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011056777.1A CN112096975A (en) 2020-09-29 2020-09-29 Silencing gas conveying pipeline for air purifier

Publications (1)

Publication Number Publication Date
CN112096975A true CN112096975A (en) 2020-12-18

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CN202011056777.1A Withdrawn CN112096975A (en) 2020-09-29 2020-09-29 Silencing gas conveying pipeline for air purifier

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113007463A (en) * 2021-03-29 2021-06-22 浙江建设职业技术学院 Building plumbing sound insulation pipeline
CN114905616A (en) * 2022-04-28 2022-08-16 洛阳万基新型墙材有限公司 Still kettle exhaust treatment device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113007463A (en) * 2021-03-29 2021-06-22 浙江建设职业技术学院 Building plumbing sound insulation pipeline
CN113007463B (en) * 2021-03-29 2022-05-24 浙江建设职业技术学院 Building plumbing sound insulation pipeline
CN114905616A (en) * 2022-04-28 2022-08-16 洛阳万基新型墙材有限公司 Still kettle exhaust treatment device

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Application publication date: 20201218

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