Ventilation system silencer

Abstract

The utility model discloses a ventilation system silencer, and relates to the technical field of ship ventilation and silencing. The filter plates are arranged on one side of the interior of the silencing pipe at equal intervals, and a plurality of sound absorption grooves are formed in the inner circumferential wall of the silencing pipe in a matrix mode. The sound absorption plates are arranged in the silencing pipe at equal intervals in a front-back staggered mode, rotating rods are fixed to the interiors of the sound absorption plates in a penetrating mode, the upper ends and the lower ends of the rotating rods are rotationally connected to the upper inner wall and the lower inner wall of the silencing pipe through bearings correspondingly, and the sides, adjacent to the inner center of the silencing pipe, of the sound absorption plates are obliquely arranged towards the sides away from the filtering plates; the sound-absorbing cotton is fixed on one side wall, adjacent to the filter plate, of the sound-absorbing plate in a one-to-one correspondence manner, and one side, adjacent to the side wall of the silencing pipe, of the sound-absorbing cotton is connected with the inner wall of the silencing pipe through elastic cloth; the angle adjusting mechanism is arranged in the side wall of the silencing pipe and connected with the rotating rod. According to the noise reduction device, noise reduction and sound insulation can be conducted on the wind sound at the ventilation system, the angle of the noise reduction plate can be adjusted according to the wind speed and the wind sound during noise reduction, and the noise reduction effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of ship ventilation and noise reduction technology, specifically to a silencer for a ventilation system. Background Technology

[0002] Ships are vehicles that can navigate or anchor in waterways for transportation or operations. Ship ventilation ducts are important components that ensure normal ventilation on ships. Traditional ship ventilation ducts can basically meet people's needs. However, most ship ventilation ducts on the market are noisy during daily use, which greatly affects the normal use of ships, reduces the comfort of ships, and affects the normal rest of ship crew. Utility Model Content

[0003] The purpose of this utility model is to provide a ventilation system silencer that is reasonably designed and easy to use, which can effectively solve the defects and shortcomings of the existing technology.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: it comprises a silencing pipe, sound insulation cotton, and flanges; the silencing pipe is internally embedded with sound insulation cotton, and flanges are fitted and fixed at both ends of the silencing pipe; it also comprises:

[0005] The filter plates are multiple and are equidistantly arranged on one side inside the silencer tube. The inner circumferential wall of the silencer tube is provided with several sound-absorbing grooves in a matrix.

[0006] The sound-absorbing plate consists of several sound-absorbing plates, which are equidistantly and staggered inside the silencer tube. A rotating rod is fixed through the inside of the sound-absorbing plate. The upper and lower ends of the rotating rod are respectively screwed to the upper and lower inner walls of the silencer tube through bearings. The side of the sound-absorbing plate adjacent to the center of the silencer tube is inclined away from the side of the filter plate.

[0007] The sound-absorbing cotton consists of several pieces, each fixed to a side wall of the sound-absorbing plate adjacent to the filter plate. The side of the sound-absorbing cotton adjacent to the side wall of the silencer tube is connected to the inner wall of the silencer tube via an elastic cloth.

[0008] An angle adjustment mechanism is provided inside the side wall of the silencer tube and is connected to the rotating rod;

[0009] The above technical solution connects the silencer pipe to the ventilation duct via a flange. Air from the ventilation duct enters the silencer pipe and is filtered by a filter plate. Then, noise is absorbed and soundproofed by the sound-absorbing grooves, sound-absorbing plates, and sound-absorbing cotton inside the silencer pipe. During use, the angle of the sound-absorbing plate can be adjusted according to the airflow speed via an angle adjustment mechanism to improve the sound absorption effect.

[0010] As a further improvement of this utility model, the angle adjustment mechanism includes:

[0011] The sliding blocks are a plurality of each other, and are symmetrically arranged in pairs in the grooves on the side wall of the sound-absorbing plate away from the sound-absorbing cotton. Two sliding blocks on the same sound-absorbing plate are connected by a connecting rod.

[0012] The screw, which consists of several screws, is movably sleeved on the connecting rod in a corresponding manner. An internal threaded tube is screwed onto the other end of the screw, and the internal threaded tube is screwed onto the side wall of the muffler tube through a bearing.

[0013] The adjusting rod is screwed onto the top wall of the muffler tube via a bearing, and the front and rear ends of the adjusting rod are respectively connected to the corresponding synchronous wheel transmission assembly via a synchronous wheel transmission assembly.

[0014] A rotating disc is suspended on the front side of the muffler tube and connected to the front end of the internally threaded tube on the front side.

[0015] Through the above technical solution, the rotating disc drives the internally threaded tube connected to it to rotate. The internally threaded tube drives the adjusting rod to rotate through the synchronous wheel transmission assembly. The adjusting rod drives several other internally threaded tubes to rotate through the synchronous wheel transmission assembly. During the rotation of the internally threaded tube, the screw moves into the interior of the silencer tube. The screw drives the sliding block to move through the connecting rod. The sliding block drives the sound-absorbing plate to rotate around the axis of the rotating rod, thereby achieving the effect of adjusting the angle of the sound-absorbing plate.

[0016] As a further improvement of this utility model, a driven gear is sleeved and fixed on the internal threaded tube adjacent to the rotating disc. A driving gear meshes with the lower side of the driven gear. The diameter of the driving gear is smaller than that of the driven gear. The shaft on the driving gear is fixedly connected to the rotating disc.

[0017] With the above technical solution, during adjustment, turning the disc drives the drive gear to rotate, the drive gear drives the driven gear to rotate, and the driven gear drives the internal threaded tube inside to rotate. Since the diameter of the driven gear is larger than the diameter of the drive gear, it is convenient to make fine adjustments to the angle of the sound-absorbing plate.

[0018] As a further improvement of this utility model, the outer side of the filter plate is fitted with an installation frame, the front and rear side walls of the filter plate are respectively inserted into the front and rear side walls of the installation frame, the front side of the installation frame is inserted into the front side wall of the silencer pipe, and several abutment springs are equally spaced from top to bottom in the front side wall of the installation frame, with the rear end of the abutment springs abutting against the front side wall of the filter plate.

[0019] Using the above technical solution, after filtering for a period of time, the mounting frame is pulled from the front side of the silencer tube to the outside, and then the filter plate is pushed towards the side of the spring, so that the other side of the filter plate is moved out from the side wall of the mounting frame. At this time, the filter plate can be removed from one side of the mounting frame for easy replacement.

[0020] As a further improvement of this utility model, a magnet is adsorbed on the outer wall of the rear side of the mounting frame, and the magnet is embedded and fixed in the rear side wall of the silencer tube.

[0021] The above technical solutions can increase the stability of the filter plate and the mounting frame.

[0022] As a further improvement of this utility model, baffles are fixed on both the front and rear side walls of the mounting frame. The rear baffle is attracted to the magnet, and the front side wall of the rear baffle is in contact with the front inner wall of the muffler tube. The front baffle is in contact with the front outer wall of the muffler tube.

[0023] With the above technical solution, after the mounting frame is moved to the front, the rear baffle abuts against the front inner wall of the silencer pipe. At this time, the filter plate is located on the outside of the silencer pipe, so the filter plate can be replaced. At the same time, the opening through the mounting frame can be blocked by the baffle.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows: The ventilation system silencer described in this utility model can reduce and insulate the wind noise in the ventilation system. Moreover, during the silencing process, the angle of the silencer plate can be adjusted according to the wind speed and the magnitude of the wind noise, thereby improving the silencing effect. This utility model has the advantages of reasonable design and low manufacturing cost. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model.

[0026] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0027] Figure 3 This is a schematic diagram of the structure of the sound-absorbing panel, sound-absorbing cotton, and angle adjustment mechanism in this utility model.

[0028] Figure 4 This is an exploded view of the mounting frame, filter plate, and contact spring in this utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Silencing pipe, 1-1. Sound absorption groove, 2. Sound insulation cotton, 3. Flange, 4. Filter plate, 5. Sound absorption plate, 6. Rotating rod, 7. Sound absorption cotton, 8. Angle adjustment mechanism, 8-1. Sliding block, 8-2. Connecting rod, 8-3. Screw, 8-4. Internal threaded pipe, 8-5. Adjusting rod, 8-6. Twisting disc, 9. Driven gear, 10. Driving gear, 11. Mounting frame, 12. Contact spring, 13. Magnet, 14. Baffle. Detailed Implementation

[0031] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. The preferred embodiments described are only examples. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Example 1:

[0032] like Figures 1-4 As shown, this embodiment includes a silencing pipe 1, sound insulation cotton 2, and flanges 3. The silencing pipe 1 has sound insulation cotton 2 embedded inside, and flanges 3 are fitted and welded to both ends of the silencing pipe 1. It also includes:

[0033] The filter plate 4, there are several filter plates 4, and they are equidistantly arranged on the left side inside the silencer pipe 1. The inner peripheral wall of the silencer pipe 1 is provided with several sound-absorbing grooves 1-1 in a matrix.

[0034] The sound-absorbing plate 5 consists of several plates, which are equidistantly and staggered inside the silencer tube 1. A rotating rod 6 is fixed through the inside of the sound-absorbing plate 5. The upper and lower ends of the rotating rod 6 are respectively screwed to the upper and lower inner walls of the silencer tube 1 through bearings. The side of the sound-absorbing plate 5 adjacent to the center of the inside of the silencer tube 1 is inclined away from the side of the filter plate 4.

[0035] The sound-absorbing cotton 7 consists of several pieces, which are glued and fixed one-to-one on the side wall of the sound-absorbing plate 5 adjacent to the filter plate 4. The side of the sound-absorbing cotton 7 adjacent to the side wall of the silencer pipe 1 is connected to the inner wall of the silencer pipe 1 through an elastic cloth.

[0036] Angle adjustment mechanism 8 is disposed inside the side wall of the silencer tube 1 and is connected to the rotating rod 6. Example 2:

[0037] See Figure 1-3 As shown, based on Embodiment 1, the angle adjustment mechanism 8 includes:

[0038] Sliding blocks 8-1, there are several sliding blocks 8-1, and they are symmetrically arranged in pairs in the grooves on the side wall of the sound-absorbing plate 5 away from the sound-absorbing cotton 7. Two sliding blocks 8-1 on the same sound-absorbing plate 5 are connected by a connecting rod 8-2.

[0039] Screw 8-3, there are several screws 8-3, and they are movably sleeved on the connecting rod 8-2 in a corresponding manner. The other end of the screw 8-3 is screwed with an internal thread tube 8-4, and the internal thread tube 8-4 is screwed on the side wall of the muffler tube 1 through a bearing.

[0040] Adjusting rod 8-5 is screwed onto the top wall of muffler 1 via bearings. The front and rear ends of adjusting rod 8-5 are respectively connected to the corresponding synchronous wheel transmission assembly via synchronous wheel transmission assembly.

[0041] A rotating disc 8-6 is suspended on the front side of the muffler 1. A driven gear 9 is sleeved and fixed on the internally threaded pipe 8-4 adjacent to the rotating disc 8-6. A driving gear 10 meshes with the lower side of the driven gear 9. The diameter of the driving gear 10 is smaller than the diameter of the driven gear 9. The shaft on the driving gear 10 is welded and fixed to the rotating disc 8-6. Example 3:

[0042] See Figure 1-2 , Figure 4 As shown, based on Embodiment 1, the filter plate 4 is fitted with a mounting frame 11 on its outer side. The front and rear side walls of the filter plate 4 are respectively inserted into the front and rear side walls of the mounting frame 11. A magnet 13 is adsorbed on the rear outer wall of the mounting frame 11. The magnet 13 is embedded and fixed in the rear side wall of the silencer pipe 1, which can increase the stability of the filter plate 4 and the mounting frame 11. The front side of the mounting frame 11 is inserted into the front side wall of the silencer pipe 1. Several abutment springs 12 are embedded in the front side wall of the mounting frame 11 at equal intervals from top to bottom. The rear end of the abutment springs 12 abuts against the front side wall of the filter plate 4. Baffles 14 are welded and fixed on the front and rear side walls of the mounting frame 11. The rear baffle 14 is adsorbed with the magnet 13, and the front side wall of the rear baffle 14 abuts against the front inner wall of the silencer pipe 1. The front baffle 14 abuts against the front outer wall of the silencer pipe 1.

[0043] In using this utility model, the silencer pipe 1 is connected to the ventilation duct via flange 3. Air from the ventilation duct enters the silencer pipe 1 and is filtered by filter plate 4. Noise is then absorbed and insulated by the sound-absorbing groove 1-1, sound-absorbing plate 5, and sound-absorbing cotton 7 within the silencer pipe 1. During use, turning the disc 8-6 drives the drive gear 10 to rotate, which in turn drives the driven gear 9. The driven gear 9 then drives the internally threaded tube 8-4 to rotate. Because the diameter of the driven gear 9 is larger than that of the drive gear 10, it is easy to finely adjust the angle of the sound-absorbing plate 5. The internally threaded tube 8-4 drives the adjusting rod 8-5 to rotate via a synchronous pulley transmission assembly. The adjusting rod 8-5, in turn, drives several other internally threaded tubes 8-4 to rotate via the synchronous pulley transmission assembly. The rotation of the internally threaded tube 8-4... During the process, the screw 8-3 is driven to move into the interior of the silencer tube 1. The screw 8-3 drives the sliding block 8-1 to move through the connecting rod 8-2. The sliding block 8-1 drives the sound-absorbing plate 5 to rotate around the axis of the rotating rod 6, thereby achieving the effect of adjusting the angle of the sound-absorbing plate 5. After filtering for a period of time, the mounting frame 11 is pulled from the front side of the silencer tube 1 to the outside. Then, the filter plate 4 is pushed to the side that abuts against the spring 12, so that the other side of the filter plate 4 moves out from the side wall of the mounting frame 11. At this time, the filter plate 4 can be taken out from one side of the mounting frame 11 for easy replacement. After the mounting frame 11 is moved to the front side, the baffle 14 on the rear side abuts against the front inner wall of the silencer tube 1. At this time, the filter plate 4 is located on the outside of the silencer tube 1, and the filter plate 4 can be replaced. At the same time, the opening penetrating the mounting frame 11 can be blocked by the baffle 14.

[0044] Compared with the prior art, the beneficial effects of this specific embodiment are as follows:

[0045] 1. The sound-absorbing cotton 7 and sound-absorbing plate 5 inside the silencer pipe 1 can buffer and absorb the wind in the ventilation system, thereby reducing the noise inside the ship;

[0046] 2. During noise reduction, the angle of the noise reduction plate 1 can be adjusted by the angle adjustment mechanism 8 according to the wind speed and the noise level, which improves the noise reduction effect;

[0047] 3. A filter plate 4 is installed inside the silencer pipe 1, and the filter plate 4 is installed inside the silencer pipe 1 through the mounting frame 11, which facilitates the replacement of the filter plate 4 without affecting the airflow inside the silencer pipe 1.

[0048] 4. The baffles 14 provided on the front and rear sides of the mounting frame 11 can limit the position of the mounting frame 11 and at the same time cover the gap between the mounting frame 11 and the silencer pipe 1.

[0049] For those skilled in the art, modifications can be made to the technical solutions described in the foregoing embodiments, and equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A silencer for a ventilation system, comprising a silencer pipe (1), sound insulation cotton (2), and flanges (3), wherein the silencer pipe (1) is internally fitted with sound insulation cotton (2), and flanges (3) are fitted and fixed at both ends of the silencer pipe (1); characterized in that: It also includes: The filter plate (4) consists of several plates, which are equidistantly arranged on one side inside the silencer pipe (1). The inner circumferential wall of the silencer pipe (1) is provided with several sound-absorbing grooves (1-1) in a matrix. The sound-absorbing plate (5) consists of several pieces, which are equidistantly and staggered in the interior of the silencer tube (1). A rotating rod (6) is fixed through the interior of the sound-absorbing plate (5). The upper and lower ends of the rotating rod (6) are respectively screwed onto the upper and lower inner walls of the silencer tube (1) through bearings. The side of the sound-absorbing plate (5) adjacent to the center of the interior of the silencer tube (1) is inclined away from the side of the filter plate (4). The sound-absorbing cotton (7) consists of several pieces, and each piece is fixed to a side wall of the sound-absorbing plate (5) adjacent to the filter plate (4). The side of the sound-absorbing cotton (7) adjacent to the side wall of the silencer pipe (1) is connected to the inner wall of the silencer pipe (1) through an elastic cloth. Angle adjustment mechanism (8) is located inside the side wall of the silencer pipe (1) and is connected to the rotating rod (6).

2. A silencer for a ventilation system according to claim 1, characterized in that: The angle adjustment mechanism (8) includes: Sliding blocks (8-1), there are several sliding blocks (8-1), and they are symmetrically arranged in pairs in the grooves on the side wall of the sound-absorbing plate (5) away from the sound-absorbing cotton (7). Two sliding blocks (8-1) on the same sound-absorbing plate (5) are connected by a connecting rod (8-2). Screw (8-3), there are several screws (8-3), and they are movably sleeved on the connecting rod (8-2) in a corresponding manner. The other end of the screw (8-3) is screwed with an internal threaded tube (8-4) by a thread. The internal threaded tube (8-4) is screwed on the side wall of the muffler tube (1) by a bearing. Adjusting rod (8-5), the adjusting rod (8-5) is screwed onto the top wall of the muffler (1) through a bearing, and the front and rear ends of the adjusting rod (8-5) are respectively connected to the corresponding synchronous wheel transmission assembly through the synchronous wheel transmission assembly; The rotating disc (8-6) is suspended on the front side of the muffler (1) and is connected to the front end of the internally threaded pipe (8-4) on the front side.

3. A silencer for a ventilation system according to claim 2, characterized in that: A driven gear (9) is fitted and fixed on the internal threaded tube (8-4) adjacent to the rotating disc (8-6). A driving gear (10) meshes with the lower side of the driven gear (9). The diameter of the driving gear (10) is smaller than the diameter of the driven gear (9). The shaft on the driving gear (10) is fixedly connected to the rotating disc (8-6).

4. A silencer for a ventilation system according to claim 1, characterized in that: The filter plate (4) is fitted with an installation frame (11) on its outer side. The front and rear side walls of the filter plate (4) are respectively inserted into the front and rear side walls of the installation frame (11). The front side of the installation frame (11) is inserted into the front side wall of the silencer pipe (1). Several abutment springs (12) are equally spaced from top to bottom in the front side wall of the installation frame (11). The rear end of the abutment springs (12) abuts against the front side wall of the filter plate (4).

5. A silencer for a ventilation system according to claim 4, characterized in that: A magnet (13) is adsorbed on the outer wall of the rear side of the mounting frame (11), and the magnet (13) is embedded and fixed in the rear wall of the silencer tube (1).

6. A silencer for a ventilation system according to claim 5, characterized in that: The mounting frame (11) has baffles (14) fixed on both the front and rear side walls. The rear baffle (14) is attracted to the magnet (13), and the front side wall of the rear baffle (14) is in contact with the front inner wall of the silencer pipe (1). The front baffle (14) is in contact with the front outer wall of the silencer pipe (1).

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