Sound insulation and noise reduction suspended ceiling structure

Abstract

The invention relates to the technical field of suspended ceiling structures, and discloses a sound insulation and noise reduction suspended ceiling structure which comprises a plurality of splicing modules which are the same in structure and spliced together. Second vacuum silencing bags staggered with the first vacuum silencing bags are evenly fixed to the top of the sound insulation plate, the second vacuum silencing bags are semi-elliptical spherical bags, sound absorption seats with upward openings are assembled among the four adjacent sets of first vacuum silencing bags, each set of sound absorption seats is in a semi-elliptical spherical shape, and the first vacuum silencing bags and the second vacuum silencing bags are arranged in a staggered mode. A semi-elliptical spherical silencing block is assembled in each group of sound absorption seats, so that the variability of the reflection direction of noise is improved, the energy loss of the noise after reflection is increased, the circular silencing grooves can be stretched to be elliptical, and the conduction path and the reflection characteristic of sound waves in the elliptical holes are changed, so that the sound absorption effect is enhanced; when low-frequency noise is generated and vibration is generated, a good sound absorption effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of ceiling suspended ceiling structures, and in particular to a ceiling suspended ceiling structure for sound insulation and noise reduction. Background Art

[0002] In current residential designs, the structure of the floor is usually a concrete floor with a plastered surface. Due to the strong rigidity of the floor, it has a poor effect in isolating the noise generated by people's activities upstairs. The current solution on the market is to install a soundproof ceiling under the floor during interior decoration.

[0003] A sound-insulating and noise-reducing ceiling structure with application number CN201921558682.2, the sound-insulating ceiling also includes a gypsum sound insulation layer, the gypsum sound insulation layer includes a first gypsum board, a connecting board, and a second gypsum board arranged from top to bottom, the first gypsum board is fixedly connected to the lower surface of the covering keel by self-tapping bolts, an upper groove is provided on the upper surface of the connecting board, and a lower groove is provided on the lower surface of the connecting board. The connecting plate is fixedly connected to the lower surface of the covering keel by self-tapping screws passing through the first gypsum board, and the second gypsum board is fixedly connected to the lower surface of the upper groove by self-tapping screws. An upper cavity is formed between the upper groove and the first gypsum board, and a lower cavity is formed between the lower groove and the second gypsum board.

[0004] When the actual ceiling structure is being installed, the floor will vibrate, which will cause the hanging keel to vibrate, causing the adjacent ceiling structure to be misaligned, which may cause the ceiling to deform or sag, affecting the sound insulation performance. The market uses a single sound insulation pad and sound-absorbing cotton to enhance the sound absorption effect, but in actual use, sound waves of different frequencies have different degrees of dependence on materials. Simply setting up a sound insulation layer cannot meet the absorption needs of low-frequency sounds and high-mid-frequency sounds at the same time, which makes it difficult to absorb noise and the sound insulation and noise reduction effect is poor.

[0005] Therefore, the present invention proposes a ceiling structure with sound insulation and noise reduction to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a ceiling structure with sound insulation and noise reduction to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a ceiling structure for sound insulation and noise reduction, comprising a plurality of groups of splicing modules with the same structure and spliced ​​together, wherein the splicing modules are a first ceiling unit and a second ceiling unit with the same structure, and a sound insulation sealing felt is nested and installed between the first ceiling unit and the second ceiling unit;

[0008] The first ceiling unit comprises a suspension rod, a main keel is installed at the bottom end of the suspension rod, auxiliary keels are fixed to the bottom of the main keel, a splicing frame is fixedly installed on the outer side of the auxiliary keel, a decorative panel is snap-fitted on the inner bottom of the splicing frame, a sound insulation damping pad is laid on the top of the decorative panel, a sound insulation board is laid on the top of the sound insulation damping pad, a first vacuum sound-absorbing bag is linearly arranged on the top of the sound insulation board, the first vacuum sound-absorbing bag is a semi-elliptical spherical bag, and the top of the sound insulation board is uniformly A second vacuum sound-absorbing bag is fixed and arranged alternately with the first vacuum sound-absorbing bag, and the height of the second vacuum sound-absorbing bag is smaller than that of the first vacuum sound-absorbing bag. Each group of secondary keels is fixed to the top of the first vacuum sound-absorbing bags arranged linearly. The second vacuum sound-absorbing bags are semi-ellipsoidal spherical bags. Sound-absorbing seats with upward openings are installed between the four adjacent groups of first vacuum sound-absorbing bags, and each group of sound-absorbing seats is semi-ellipsoidal. Each group of sound-absorbing seats is fixed to the top of the second vacuum sound-absorbing bag, and each group of the sound-absorbing seats is equipped with a semi-ellipsoidal sound-absorbing block.

[0009] The circular silencer groove on the silencer block can accelerate the conduction of noise, and then make the noise reflect in the circular hole, realize energy attenuation, and complete the sound absorption effect. Moreover, the sound-absorbing seat can isolate the noise inside the circular silencer groove to prevent the noise from further transmitting downward. The noise introduced into the silencer space formed by the first vacuum silencer bag and the second vacuum silencer bag is reflected by the first vacuum silencer bag and the second vacuum silencer bag, and the energy of the noise is attenuated. The first vacuum silencer bag and the second vacuum silencer bag will not transmit sound waves, thereby improving the noise isolation ability.

[0010] Preferably, the outer diameter of each group of second vacuum silencer bags is the same as the distance between two diagonal groups of first vacuum silencer bags, and the tips of each group of first vacuum silencer bags and second vacuum silencer bags are both set upward, and the silencer block is evenly provided with vertically penetrating circular silencer grooves.

[0011] Preferably, the first vacuum silencer bags are arranged in nine rows, and the number of the secondary keels is the same as the number of rows of the first vacuum silencer bags, the main keel is connected to the secondary keel via connecting bolts, and the main keel and the secondary keel are arranged vertically.

[0012] Preferably, an annular mounting groove is provided at the top of the outer side wall of the splicing frame, and the sound insulation sealing felt is nested and assembled in the annular mounting groove.

[0013] Preferably, each group of the sound absorbing seats is fixedly connected to the outer side wall of the first vacuum sound-absorbing bag, and two adjacent groups of the sound absorbing seats are connected.

[0014] Preferably, a conical sound collecting groove running longitudinally through is provided at the center of the silencer block, a wedge-shaped groove connected to the conical sound collecting groove is evenly provided at the top of the silencer block and on one side of the circumference of the conical sound collecting groove, a first silencer channel is evenly provided on the outer side of the wedge-shaped groove along the circumferential direction of the silencer block, a second silencer channel is evenly provided on the outer side of the first silencer channel along the circumferential direction of the silencer block, and a third silencer channel is evenly provided on the outer side of the second silencer channel along the circumferential direction of the silencer block.

[0015] Preferably, the diameters of the first silencer channel, the second silencer channel and the third silencer channel increase sequentially, and the first silencer channel, the second silencer channel and the third silencer channel are all arranged along the contour line direction of the silencer block.

[0016] Preferably, each group of first silencer channels, second silencer channels, and third silencer channels are connected through the silencer block and the conical sound collecting groove, the intersection of each group of first silencer channels and the conical sound collecting groove is set as a silencer hole, the intersection of multiple groups of second silencer channels and the conical sound collecting groove is set as a first annular oscillation groove, and the intersection of multiple groups of third silencer channels and the conical sound collecting groove is set as a second annular oscillation groove.

[0017] Preferably, the outer edge of the sound-absorbing block is fixed on the inner side wall of the sound-absorbing seat, and a cavity is reserved between the bottom of the sound-absorbing block and the sound-absorbing seat, and the cavity is connected to the conical sound collecting groove.

[0018] Technical effects and advantages of the present invention:

[0019] 1. When the present invention is actually used, the circular silencer groove on the silencer block can accelerate the conduction of noise, and then the noise is reflected in the circular hole to achieve energy attenuation and complete the sound absorption effect. In addition, the sound absorbing seat can isolate the noise inside the circular silencer groove to prevent the noise from further transmitting downward. The noise introduced into the silencer space formed by the first vacuum silencer bag and the second vacuum silencer bag is attenuated after being reflected by the first vacuum silencer bag and the second vacuum silencer bag. The first vacuum silencer bag and the second vacuum silencer bag will not transmit sound waves, thereby improving the noise isolation ability. Therefore, the reflection and scattering ability of the noise in the silencer space can be guaranteed, so that the noise is reflected multiple times between the first vacuum silencer bag, the second vacuum silencer bag and the outer wall of the sound absorbing seat, thereby accelerating the attenuation of noise energy.

[0020] 2. When the present invention generates vibration, the splicing frame is caused to vibrate with the movement, causing the first vacuum sound-absorbing bag to be squeezed and deformed under the vibration. After the first vacuum sound-absorbing bag is squeezed and deformed, the cross-sectional area increases, the noise isolation area increases, and the sound insulation effect is improved. When the sound insulation board and the first vacuum sound-absorbing bag vibrate upward, the secondary keel will squeeze the sound-absorbing seat, and then the sound-absorbing seat will squeeze the second vacuum sound-absorbing bag, causing it to deform, increasing the variability of the reflection direction of the noise, so that the energy loss of the noise after reflection increases, and the sound absorption effect is improved. When the sound-absorbing seat is squeezed, the silencer block will be stretched and deformed synchronously, so that the circular silencer groove will be stretched into an ellipse. In this way, the major axis and minor axis of the elliptical hole can be adjusted when the silencer block is stretched, so that its absorption capacity for sound waves in different directions is different, the introduction method of sound waves can be optimized, the introduction resistance of sound waves can be reduced, the reflection and oscillation effect of sound waves can be enhanced, and the conduction path and reflection characteristics of sound waves in the elliptical hole can be changed, thereby enhancing the sound absorption effect, so that it has a better sound absorption effect when low-frequency noise occurs and vibrations are generated. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the first ceiling unit of the present invention;

[0023] Figure 3 It is a schematic diagram of the internal structure of the first ceiling unit of the present invention;

[0024] Figure 4 This is a schematic structural diagram of a first ceiling unit according to the present invention from a first viewing angle;

[0025] Figure 5 This is a schematic structural diagram of the first ceiling unit of the present invention from a second viewing angle;

[0026] Figure 6 It is a schematic diagram of the partial assembly structure of the first ceiling unit of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of a muffler block according to a second embodiment of the present invention;

[0028] Figure 8 This is a schematic cross-sectional view of the sound-absorbing block according to the second embodiment of the present invention.

[0029] In the figure: 100, first ceiling unit; 101, splicing frame; 102, decorative board; 103, sound insulation damping pad; 104, sound insulation board; 105, first vacuum silencer bag; 106, second vacuum silencer bag; 107, suspension rod; 108, main keel; 109, connecting bolt; 110, secondary keel; 111, sound absorbing seat; 112, silencer block; 113, circular silencer groove; 114, conical sound collecting groove; 115, wedge-shaped groove; 116, first silencer channel; 117, second silencer channel; 118, third silencer channel; 119, silencer hole; 120, first annular oscillation groove; 121, second annular oscillation groove; 122, annular mounting groove; 200, second ceiling unit; 300, sound insulation sealing felt. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] Embodiment 1:

[0032] like Figures 1 to 6 As shown, the present embodiment discloses a ceiling structure for sound insulation and noise reduction, comprising a plurality of groups of splicing modules with the same structure and spliced ​​together, the splicing modules are a first ceiling unit 100 and a second ceiling unit 200 with the same structure, so that the distribution of the splicing modules is reasonably arranged according to the size of the roof, and the ceiling assembly can be achieved through a plurality of splicing modules, and a sound insulation sealing felt 300 is nested and installed between the first ceiling unit 100 and the second ceiling unit 200, and the sound insulation sealing felt 300 is nested and sealed at the gap of the splicing module to better block the sound waves and improve the sound insulation effect.

[0033] See also Figure 1-Figure 5The first ceiling unit 100 includes a suspension rod 107, a main keel 108 is installed at the bottom end of the suspension rod 107, and auxiliary keels 110 are dispersedly fixed at the bottom of the main keel 108. A splicing frame 101 is fixedly installed on the outer side of the auxiliary keel 110, and a decorative panel 102 is snap-fitted and installed on the inner bottom of the splicing frame 101. A sound insulation damping pad 103 is laid on the top of the decorative panel 102, and a sound insulation board 104 is laid on the top of the sound insulation damping pad 103. A first vacuum sound-absorbing bag 105 is linearly arranged on the top of the sound insulation board 104. The first vacuum sound-absorbing bag 105 is a semi-elliptical spherical bag, and a second vacuum sound-absorbing bag 106 staggered with the first vacuum sound-absorbing bag 105 is evenly fixed on the top of the sound insulation board 104, and the height of the second vacuum sound-absorbing bag 106 is less than the first vacuum sound-absorbing bag 105. Each group of auxiliary keels 110 is fixed on the first vacuum sound-absorbing bag 105 arranged linearly. A top of a vacuum sound-absorbing bag 105, a second vacuum sound-absorbing bag 106 is a semi-ellipsoidal spherical bag, a sound-absorbing seat 111 with an upward opening is installed between four adjacent groups of first vacuum sound-absorbing bags 105, and each group of sound-absorbing seats 111 is semi-ellipsoidal, and each group of sound-absorbing seats 111 is fixed to the top of the second vacuum sound-absorbing bag 106, and each group of sound-absorbing seats 111 is equipped with a semi-ellipsoidal spherical sound-absorbing block 112 inside, each group of sound-absorbing seats 111 is fixedly connected to the outer wall of the first vacuum sound-absorbing bag 105, and two adjacent groups of sound-absorbing seats 111 are connected, the outer diameter of each group of second vacuum sound-absorbing bags 106 is the same as the distance between the two groups of first vacuum sound-absorbing bags 105 on the diagonal line, and the tips of each group of first vacuum sound-absorbing bags 105 and second vacuum sound-absorbing bags 106 are set upward, and the sound-absorbing blocks 112 are evenly provided with vertically penetrating circular sound-absorbing grooves 113.

[0034] In actual use, all the splicing modules are spliced ​​and installed on the ceiling through the hanger 107, and then the sound insulation sealing felt 300 is encapsulated between two adjacent groups of splicing modules to form a sealing reinforcement layer to avoid gaps or loose joints between adjacent splicing modules during the installation process, which will cause sound waves to be transmitted through these gaps and reduce the sound insulation effect. After the splicing of the splicing modules is completed, the isolation and absorption of noise is completed by laying the splicing modules side by side, that is:

[0035] When noise is generated on the ceiling, the noise will be directly transmitted to the muffler block 112 and the muffler space formed by the first vacuum muffler bag 105 and the second vacuum muffler bag 106. The circular muffler groove 113 on the muffler block 112 can accelerate the conduction of the noise, and then the noise is reflected in the circular hole to achieve energy attenuation and complete the sound absorption effect. In addition, the sound absorbing seat 111 can isolate the noise inside the circular muffler groove 113 to prevent the noise from being further transmitted downward. The noise introduced into the muffler space formed by the first vacuum muffler bag 105 and the second vacuum muffler bag 106 is reflected by the first vacuum muffler bag 105 and the second vacuum muffler bag 106, and the energy of the noise is attenuated, while the first vacuum muffler bag 105 and the second vacuum muffler bag 106 are not The conduction of sound waves will occur, and the noise isolation ability will be improved. Therefore, the reflection and scattering ability of noise in the soundproofing space can be guaranteed, so that the noise is reflected multiple times between the outer walls of the first vacuum soundproofing bag 105, the second vacuum soundproofing bag 106, and the sound-absorbing seat 111, and the attenuation of noise energy is accelerated. Therefore, the first vacuum soundproofing bag 105, the second vacuum soundproofing bag 106, the sound-absorbing seat 111 and the soundproofing block 112 cooperate to achieve a significant weakening and absorption of noise, thereby ensuring the sound insulation and noise reduction effect of the ceiling structure, and the sound insulation board 104 isolates the remaining sound waves above the splicing module, and the sound insulation damping pad 103 and the sound insulation board 104 work together to further enhance the sound insulation effect, and the multi-layer sound insulation structure can absorb sound waves of different frequencies to provide more comprehensive sound insulation performance.

[0036] When noise is generated on the ceiling, it will inevitably cause vibration, and the vibration will be transmitted to the secondary keel 110 through the suspension rod 107 and the main keel 108, thereby prompting the splicing frame 101 to vibrate. After the splicing frame 101 vibrates, it will drive the sound insulation board 104 and the first vacuum sound-absorbing bag 105 to vibrate. When the sound insulation board 104 and the first vacuum sound-absorbing bag 105 vibrate upward, the first vacuum sound-absorbing bag 105 will be squeezed and deformed under the condition of vibration. After the first vacuum sound-absorbing bag 105 is squeezed and deformed, the cross-sectional area increases, and the noise isolation area increases, thereby improving the sound insulation effect. When the sound insulation board 104 and the first vacuum sound-absorbing bag 105 vibrate upward, the secondary keel 110 will squeeze the sound-absorbing seat 111, thereby prompting the sound-absorbing seat 111 to squeeze the second The vacuum silencer bag 106 is squeezed to cause it to deform, thereby increasing the variability of the reflection direction of the noise, increasing the energy loss of the noise after reflection, and improving the sound absorption effect. Moreover, when the sound-absorbing seat 111 is squeezed, the silencer block 112 will be stretched and deformed synchronously, so that the circular silencer groove 113 will be stretched into an ellipse. In this way, the major axis and the minor axis of the elliptical hole can be adjusted when the silencer block 112 is stretched, so that its absorption capacity for sound waves in different directions is different, the introduction method of the sound wave can be optimized, the resistance to the introduction of the sound wave can be reduced, and the reflection and oscillation effect of the sound wave can be enhanced. The conduction path and reflection characteristics of the sound wave in the elliptical hole can be changed, thereby enhancing the sound absorption effect, so that when low-frequency noise occurs and vibrations are generated, it has a better sound absorption effect.

[0037] At the same time, when the ceiling structure vibrates, the sound insulation damping pad 103 converts vibration energy into heat energy through internal friction and shear deformation, thereby reducing the vibration and noise of the structure, effectively reducing the resonant frequency and amplitude of the structure, and reducing the transmission of sound waves. Combined with the use of the sound insulation board 104, the sound insulation and noise reduction effect is enhanced.

[0038] See also Figure 1-Figure 5 The first vacuum silencer bags 105 are arranged in nine rows, and the number of the secondary keels 110 is the same as the number of rows of the first vacuum silencer bags 105. The main keel 108 is connected to the secondary keel 110 by connecting bolts 109. The main keel 108 and the secondary keel 110 are arranged vertically to improve the connection convenience between the main keel 108 and the secondary keel 110.

[0039] An annular installation groove 122 is provided at the top of the outer wall of the splicing frame 101, and the sound insulation sealing felt 300 is nested and assembled in the annular installation groove 122, so that the sound insulation sealing felt 300 can seal the gaps between the splicing modules and improve the sound insulation effect.

[0040] Embodiment 2:

[0041] Since the structure of the circular silencer groove 113 is the most common silencer hole shape, its edge is smooth, and the sound wave encounters less resistance when entering the hole, which is conducive to the conduction and reflection of the sound wave. However, the sound absorption effect of the circular hole is relatively limited, and it is mainly suitable for the absorption of medium and high frequency noise, resulting in poor absorption capacity of low frequency noise, and the sound waves in the circular silencer groove 113 cannot be reflected and scattered multiple times in the hole, resulting in poor sound absorption effect. Based on this, this embodiment optimizes and improves the structure of the silencer block 112, specifically:

[0042] like Figure 7 and Figure 8 As shown, a conical sound collecting groove 114 running longitudinally through is provided at the center of the silencer block 112, a wedge-shaped groove 115 connected to the conical sound collecting groove 114 is evenly provided at the top of the silencer block 112 and on one side of the circumference of the conical sound collecting groove 114, a first sound-absorbing channel 116 is evenly provided on the outer side of the wedge-shaped groove 115 along the circumferential direction of the silencer block 112, a second sound-absorbing channel 117 is evenly provided on the outer side of the first sound-absorbing channel 116 along the circumferential direction of the silencer block 112, and a third sound-absorbing channel 118 is evenly provided on the outer side of the second sound-absorbing channel 117 along the circumferential direction of the silencer block 112.

[0043] The silencer structure on the silencer block 112 is optimized, and the conical sound collecting groove 114 makes it easier to collect noise, while the wedge-shaped groove 115 facilitates the channeling of noise into the conical sound collecting groove 114. At the same time, combined with the sound absorption effect of the first silencer channel 116, the second silencer channel 117, and the third silencer channel 118, the conduction path of noise on the silencer block 112 can be increased, and through the coordination of different silencer structures, noise of different frequencies can be conducted and absorbed, greatly increasing the number of reflections and scattering times of noise in the silencer structure, increasing the chance of noise energy consumption, and achieving effective absorption of wide-band noise.

[0044] like Figure 7 and Figure 8 As shown, the diameters of the first silencer channel 116, the second silencer channel 117, and the third silencer channel 118 increase successively, and the first silencer channel 116, the second silencer channel 117, and the third silencer channel 118 are all arranged along the contour line direction of the silencer block 112, each group of the first silencer channel 116, the second silencer channel 117, and the third silencer channel 118 pass through the silencer block 112 and are connected with the conical sound collecting groove 114, and the intersection of each group of first silencer channels 116 and the conical sound collecting groove 114 is set as a silencer hole 119, and the silencer hole 119 is the exit hole of the first silencer channel 116, the intersection of multiple groups of second silencer channels 117 and the conical sound collecting groove 114 is set as a first annular oscillation groove 120, and the intersection of multiple groups of third silencer channels 118 and the conical sound collecting groove 114 is set as a second annular oscillation groove 121.

[0045] When the noise is conducted in the first silencer channel 116, the second silencer channel 117, and the third silencer channel 118, since the paths of the first silencer channel 116, the second silencer channel 117, and the third silencer channel 118 are longer, the absorption effect on low-frequency and medium-frequency noise is more significant. In addition, the silencer hole 119 can conduct the noise in the first silencer channel 116 to the conical sound collecting groove 114, which is convenient for the collision between noises to complete energy loss and facilitate noise absorption. After the noise in the second silencer channel 117 is conducted to the inside of the first annular oscillation groove 120, the number of reflections of the noise can be increased. Similarly, after the noise in the third silencer channel 118 is conducted to the inside of the second annular oscillation groove 121, the number of reflections of the noise can also be increased. Moreover, the first annular oscillation groove 120 and the second annular oscillation groove 121 have more edges and corners. When the sound waves enter the hole, they will be reflected and scattered multiple times, which increases the contact area between the sound waves and the hole wall, thereby improving the sound absorption effect.

[0046] The wedge-shaped groove 115 is a shallow groove and has a good effect on absorbing high-frequency noise. The conical sound collecting groove 114 can effectively reduce the reflection path of noise and increase the number of energy consumption as the aperture decreases, thereby completing the absorption of low, medium and high-frequency noise.

[0047] It is worth mentioning that the outer edge of the silencer block 112 is fixed on the inner wall of the sound-absorbing seat 111, and a cavity is retained between the bottom of the silencer block 112 and the sound-absorbing seat 111, and the cavity is connected to the conical sound collecting groove 114. The residual noise after being absorbed by the silencer block 112 will enter the cavity through the conical sound collecting groove 114, and the residual noise will be collected and absorbed through the isolation effect of the sound-absorbing seat 111, thereby greatly improving the sound insulation and noise reduction effect of the ceiling structure.

[0048] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A ceiling structure for sound insulation and noise reduction, comprising a plurality of groups of splicing modules with the same structure and spliced ​​together, characterized in that: The splicing module is a first ceiling unit (100) and a second ceiling unit (200) of the same structure, and a sound insulation sealing felt (300) is nested and installed between the first ceiling unit (100) and the second ceiling unit (200); The first ceiling unit (100) comprises a suspension rod (107), a main keel (108) is installed at the bottom end of the suspension rod (107), auxiliary keels (110) are fixedly arranged at the bottom of the main keel (108), a splicing frame (101) is fixedly installed on the outer side of the auxiliary keel (110), a decorative panel (102) is snap-fitted and installed on the inner bottom of the splicing frame (101), a sound insulation damping pad (103) is installed on the top of the decorative panel (102), a sound insulation board (104) is installed on the top of the sound insulation damping pad (103), a first vacuum sound-absorbing bag (105) is linearly arranged on the top of the sound insulation board (104), the first vacuum sound-absorbing bag (105) is a semi-elliptical spherical bag, and the sound insulation board The top of the (104) is evenly fixed with a second vacuum sound-absorbing bag (106) arranged alternately with the first vacuum sound-absorbing bag (105), and the height of the second vacuum sound-absorbing bag (106) is smaller than that of the first vacuum sound-absorbing bag (105), each group of secondary keels (110) is fixed to the top of the first vacuum sound-absorbing bags (105) arranged in a linear manner, the second vacuum sound-absorbing bags (106) are semi-ellipsoidal bags, and sound-absorbing seats (111) with openings facing upward are installed between four adjacent groups of first vacuum sound-absorbing bags (105), and each group of sound-absorbing seats (111) is semi-ellipsoidal, and each group of sound-absorbing seats (111) is fixed to the top of the second vacuum sound-absorbing bag (106), and each group of the sound-absorbing seats (111) is equipped with a semi-ellipsoidal sound-absorbing block (112) inside.

2. The ceiling structure for sound insulation and noise reduction according to claim 1 is characterized in that: The outer diameter of each group of second vacuum silencer bags (106) is the same as the distance between two diagonally located groups of first vacuum silencer bags (105), and the tips of each group of first vacuum silencer bags (105) and second vacuum silencer bags (106) are both arranged upward, and the silencer blocks (112) are evenly provided with vertically penetrating circular silencer grooves (113).

3. The ceiling structure for sound insulation and noise reduction according to claim 2 is characterized in that: The number of the secondary keels (110) is the same as the number of rows of the first vacuum silencer bags (105); the main keel (108) is connected to the secondary keel (110) via a connecting bolt (109); and the main keel (108) and the secondary keel (110) are vertically arranged.

4. The ceiling structure for sound insulation and noise reduction according to claim 1 is characterized in that: An annular installation groove (122) is provided at the top of the outer side wall of the splicing frame (101), and the sound insulation sealing felt (300) is nested and assembled in the annular installation groove (122).

5. The ceiling structure for sound insulation and noise reduction according to claim 1 is characterized in that: Each group of the sound absorbing seats (111) is fixedly connected to the outer side wall of the first vacuum sound-absorbing bag (105), and two adjacent groups of the sound absorbing seats (111) are connected.

6. The ceiling structure for sound insulation and noise reduction according to claim 1, characterized in that: A conical sound collecting groove (114) extending longitudinally through the sound-absorbing block (112) is provided at the center thereof; a wedge-shaped groove (115) communicating with the conical sound collecting groove (114) is evenly provided at the top of the sound-absorbing block (112) and on one side of the circumference of the conical sound collecting groove (14); a first sound-absorbing channel (116) is evenly provided on the outer side of the wedge-shaped groove (115) along the circumferential direction of the sound-absorbing block (112); a second sound-absorbing channel (117) is evenly provided on the outer side of the first sound-absorbing channel (116) along the circumferential direction of the sound-absorbing block (112); and a third sound-absorbing channel (118) is evenly provided on the outer side of the second sound-absorbing channel (117) along the circumferential direction of the sound-absorbing block (112).

7. The ceiling structure for sound insulation and noise reduction according to claim 6, characterized in that: The diameters of the first silencer channel (116), the second silencer channel (117), and the third silencer channel (118) increase sequentially, and the first silencer channel (116), the second silencer channel (117), and the third silencer channel (118) are all arranged along the contour line direction of the silencer block (112).

8. The ceiling structure for sound insulation and noise reduction according to claim 7, characterized in that: Each group of first silencer channels (116), second silencer channels (117), and third silencer channels (118) pass through the silencer block (112) and are connected to the conical sound collecting groove (114); the intersection of each group of first silencer channels (116) and the conical sound collecting groove (114) is set as a silencer hole (119); the intersection of multiple groups of second silencer channels (117) and the conical sound collecting groove (114) is set as a first annular oscillation groove (120); and the intersection of multiple groups of third silencer channels (118) and the conical sound collecting groove (114) is set as a second annular oscillation groove (121).

9. The ceiling structure for sound insulation and noise reduction according to claim 8, characterized in that: The outer edge of the muffler block (112) is fixed on the inner wall of the sound absorbing seat (111), and a cavity is retained between the bottom of the muffler block (112) and the sound absorbing seat (111), and the cavity is communicated with the conical sound collecting groove (114).

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