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CN-122015280-A - Noise elimination and reduction equipment for building ventilating duct

CN122015280ACN 122015280 ACN122015280 ACN 122015280ACN-122015280-A

Abstract

The invention discloses a building ventilating duct noise elimination and reduction device, which relates to the technical field of ventilating duct noise elimination and reduction, and comprises a mounting cabinet, wherein one end of the mounting cabinet is fixedly communicated with a plurality of groups of fixed pipelines, two adjacent fixed pipelines are fixedly communicated through bolts, the inner cavity of each fixed pipeline is provided with a noise elimination and reduction mechanism, the building ventilating duct noise elimination and reduction device comprises a replacement unit, when acoustical cotton is replaced, a protective shell and a clamping assembly are removed, the compression of the sound absorbing cotton is canceled through the expansion unit, at the moment, one end of the new sound absorbing cotton and one end of the old sound absorbing cotton are clamped by the clamping assembly, and at the moment, the other end of the old sound absorbing cotton is dragged, so that the clamping assembly and the new sound absorbing cotton are dragged into the inner cavity of the fixed pipeline, when the clamping assembly is dragged out from the through hole, the new sound absorbing cotton completely enters the inside of the fixed pipeline, and therefore the replacement of the sound absorbing cotton is realized, and the fixed pipeline is not required to be dismantled.

Inventors

  • LI XIAOJUN
  • HUO XIAOQING
  • JIN YANG

Assignees

  • 北京市劳保所科技发展有限责任公司

Dates

Publication Date
20260512
Application Date
20260325

Claims (10)

  1. 1. The silencing and noise-reducing device for the building ventilating duct comprises a mounting cabinet (1) and is characterized in that one end of the mounting cabinet (1) is fixedly communicated with a plurality of groups of fixed ducts (11), two adjacent fixed ducts (11) are fixedly communicated through bolts, a silencing and noise-reducing mechanism (2) is arranged in an inner cavity of each fixed duct (11), each silencing and noise-reducing mechanism (2) comprises a replacement unit (21) and an expansion unit (22), the expansion units (22) are matched with the replacement units (21), one side of each fixed duct (11) is provided with a mounting mechanism (3), and the mounting mechanism (3) is matched with the silencing and noise-reducing mechanism (2).
  2. 2. The device for silencing and reducing noise of building ventilation pipeline according to claim 1, wherein the replacing unit (21) comprises a through hole (2101) formed in one side of the fixed pipeline (11), sound-absorbing cotton (2102) is arranged in an inner cavity of the fixed pipeline (11), the sound-absorbing cotton (2102) is in an annular shape, two ends of the sound-absorbing cotton (2102) penetrate through the outer side of the through hole (2101), a clamping assembly is arranged at one end of the sound-absorbing cotton (2102), and a protecting shell (2103) matched with the clamping assembly is arranged on one side of the fixed pipeline (11).
  3. 3. The noise elimination and noise reduction device for building ventilating ducts according to claim 2, wherein the clamping assembly comprises a first clamping plate (2104) and a second clamping plate (2105), one end of the sound absorbing cotton (2102) is located between the first clamping plate (2104) and the second clamping plate (2105), pins (2106) are fixedly connected to the bottom of the first clamping plate (2104), the number of the pins (2106) is a plurality of, jacks (2107) matched with the pins (2106) are formed in the top of the second clamping plate (2105), a first threaded rod (2108) is rotatably connected to the inner cavity of the first clamping plate (2104), and one end of the first threaded rod (2108) penetrates through the sound absorbing cotton (2102) and is in threaded connection with the inner cavity of the second clamping plate (2105).
  4. 4. The noise elimination and noise reduction device for building ventilating ducts according to claim 2, wherein the expansion unit (22) comprises L plates (2201) arranged in an inner cavity of the fixed duct (11), the L plates (2201) are four in number, a plurality of fixing holes (2202) are formed in the inner wall of each L plate (2201), sliding rods (2203) are fixedly connected to two sides of each L plate (2201), fixing blocks (2204) are arranged between two adjacent sliding rods (2203), first telescopic rods (2205) are fixedly connected to two sides of each fixing block (2204), telescopic ends of the first telescopic rods (2205) are fixedly connected with the corresponding sliding rods (2203), and pulling assemblies matched with the fixing blocks (2204) are arranged on the inner wall of the fixed duct (11).
  5. 5. The device for silencing and noise-reducing a building ventilating duct according to claim 4, wherein a second telescopic rod (2206) is fixedly connected to the bottom of the fixed block (2204), the telescopic end of the second telescopic rod (2206) is fixedly connected with the inner wall of the fixed duct (11), a first spring (2207) is sleeved on the surface of the second telescopic rod (2206), one end of the first spring (2207) is fixedly connected with the fixed block (2204), and the other end of the first spring (2207) is fixedly connected with the inner wall of the fixed duct (11).
  6. 6. The device for muffling and noise reduction of a building ventilation pipeline according to claim 4, wherein the two sliding rods (2203) are fixedly connected with inclined blocks (2208) on opposite sides, and the inner wall of the fixed pipeline (11) is fixedly connected with extrusion blocks (2209) matched with the inclined blocks (2208).
  7. 7. The device for muffling and noise reduction of a building ventilating duct according to claim 4, wherein the pulling assembly comprises a pull rope (2210) which is connected to the inner wall of the fixed duct (11) in a sliding manner, one end of the pull rope (2210) is fixedly connected with the bottom of the fixed block (2204), the inner wall of the fixed duct (11) is rotatably connected with a winding shaft (2211), and the surface of the winding shaft (2211) is fixedly connected with the other end of the pull rope (2210).
  8. 8. The device for silencing and reducing noise of a building ventilating duct according to claim 7, wherein the mounting mechanism (3) comprises a shielding plate (301) fixedly connected to one side of a protective housing (2103), a rack (302) is fixedly connected to one side of the shielding plate (301), a gear (303) matched with the rack (302) is fixedly connected to one side of the winding shaft (2211), and a guide groove (304) matched with the rack (302) is formed in the surface of the fixed duct (11).
  9. 9. The device for silencing and reducing noise of building ventilating duct according to claim 8, wherein the top and the bottom of the protecting shell (2103) are connected with adjusting rods (305) in a threaded mode, opposite ends of the two adjusting rods (305) are connected with clamping rods (306) in a rotating mode, and two ends of the clamping rods (306) are in contact with the inner wall of the protecting shell (2103).
  10. 10. The device for silencing and reducing noise of a building ventilation pipeline according to claim 8, wherein a first sealing gasket (307) is fixedly connected to one side of the shielding plate (301), a second sealing gasket (308) is fixedly connected to one side of the protecting shell (2103) close to the fixed pipeline (11), a movable hole (309) is formed in one side of the shielding plate (301), an installation rod (310) is movably connected to an inner cavity of the movable hole (309), and one end of the installation rod (310) is in threaded connection with the inner wall of the fixed pipeline (11).

Description

Noise elimination and reduction equipment for building ventilating duct Technical Field The invention relates to the technical field of building ventilation pipeline noise elimination and noise reduction, in particular to noise elimination and noise reduction equipment for a building ventilation pipeline. Background In order to reduce noise caused by a ventilation refrigerating system, improve consumer experience, reduce noise pollution, and generally install a muffler in the ventilation refrigerating system, the muffler is an engineering product installed in the ventilation refrigerating system, and the design requirement of the ventilation system reaches a very high air flow rate in consideration of factors such as market demands, space limitations and the like. In the air circulation process, moisture is adsorbed on the sound absorbing cotton of the silencer, bacteria can be bred after the sound absorbing material is wetted and mildewed after the sound absorbing material is used for a long time, the indoor and outdoor air quality is affected, the existing solution is to detach the silencer, then replace the sound absorbing cotton in the silencer, but in the replacement process, more time is consumed, noise can be caused by air circulation after the silencer is detached, and accordingly normal use of a ventilation system is affected. Disclosure of Invention The invention aims to provide a building ventilating duct silencing and noise reducing device for solving the problems in the background technology. In order to achieve the purpose, the technical scheme is that the building ventilating duct silencing and noise reducing device comprises a mounting cabinet, one end of the mounting cabinet is fixedly communicated with a plurality of groups of fixed pipelines, two adjacent fixed pipelines are fixedly communicated through bolts, a silencing and noise reducing mechanism is arranged in an inner cavity of each fixed pipeline and comprises a replacement unit and an expansion unit, the expansion unit and the replacement unit are matched for use, one side of each fixed pipeline is provided with a mounting mechanism, and the mounting mechanism is matched with the silencing and noise reducing mechanism for use. Preferably, the replacement unit is including seting up in the through-hole of fixed pipeline one side, fixed pipeline's inner chamber is provided with inhales the sound cotton, inhale the sound cotton and be the annular setting and inhale the outside that the cotton both ends of sound run through to the through-hole, inhale the cotton one end and be provided with the clamping assembly, one side of fixed pipeline is provided with the protecting crust that uses with the clamping assembly cooperation. Preferably, the clamping assembly comprises a first clamping plate and a second clamping plate, one end of sound absorbing cotton is located between the first clamping plate and the second clamping plate, pins are fixedly connected to the bottom of the first clamping plate, the number of the pins is a plurality of, jacks matched with the pins for use are formed in the top of the second clamping plate, a first threaded rod is connected with the inner cavity of the first clamping plate in a rotating mode, and one end of the first threaded rod penetrates through the sound absorbing cotton and is in threaded connection with the inner cavity of the second clamping plate. Preferably, the expansion unit is including setting up in the L board of fixed pipeline inner chamber, the quantity of L board is four, a plurality of fixed orifices has been seted up to the inner wall of L board, the equal fixedly connected with slide bar in both sides of L board, adjacent two be provided with the fixed block between the slide bar, the equal fixedly connected with first telescopic link in both sides of fixed block, the flexible end and the slide bar fixed connection of first telescopic link, the inner wall of fixed pipeline is provided with the pulling subassembly that uses with the fixed block cooperation. Preferably, the bottom fixedly connected with second telescopic link of fixed block, the flexible end and the inner wall fixed connection of fixed pipeline of second telescopic link, the surface cover of second telescopic link is equipped with first spring, the one end and the fixed block fixed connection of first spring, the other end and the inner wall fixed connection of fixed pipeline of first spring. Preferably, two opposite sides of the sliding rod are fixedly connected with inclined blocks, and the inner wall of the fixed pipeline is fixedly connected with an extrusion block matched with the inclined blocks. Preferably, the pulling assembly comprises a pull rope which is connected to the inner wall of the fixed pipeline in a sliding manner, one end of the pull rope is fixedly connected with the bottom of the fixed block, the inner wall of the fixed pipeline is rotationally connected with a winding shaft, and the surface of