Silencing device of diesel generating set

Abstract

The invention relates to the technical field of silencing equipment, in particular to a silencing device of a diesel generating set, which comprises a silencing box body internally provided with the diesel generating set, the silencing box body is formed by sleeving an outer layer box body outside an inner layer box body, and a cavity between the inner layer box body and the outer layer box body is subjected to vacuum treatment. A vacuum cavity is formed between the inner-layer box body and the outer-layer box body; the noise reduction mechanism comprises a plurality of noise reduction pipelines arranged on the inner-layer box body, the noise reduction pipelines are distributed on the inner-layer box body at different heights, each noise reduction pipeline is formed by communicating two symmetrically-distributed folded pipelines, the number of steering pipelines of the noise reduction pipelines is at least six, and the bottoms of the noise reduction pipelines are fixedly connected with guide pipelines; the cavity between the inner-layer box body and the outer-layer box body is subjected to vacuum treatment, so that a vacuum cavity is formed between the inner-layer box body and the outer-layer box body, transmission of sound waves is prevented, the sound waves can only be transmitted outwards through the silencing pipeline, and therefore noise is subjected to silencing treatment.

Description

Technical Field

[0001] The invention relates to the technical field of silencing equipment, and in particular to a silencing device for a diesel generator set. Background Art

[0002] A diesel generator is a small-scale power generation equipment, which refers to a power machine that uses diesel as fuel and a diesel engine as the prime mover to drive the generator to generate electricity. The basic structure of a diesel engine is composed of components such as cylinders, pistons, cylinder heads, intake valves, exhaust valves, piston pins, connecting rods, crankshafts, bearings and flywheels. Although diesel generator sets have low power, they are widely used in mines, railways, field construction sites, road traffic maintenance, as well as factories, enterprises, hospitals and other departments due to their small size, flexibility, lightness, complete supporting facilities, and easy operation and maintenance. Diesel generator sets are used in places that are not connected to the power grid, or as emergency power supplies in the event of a power grid failure, as well as for more complex applications such as peak tripping, grid support and grid output.

[0003] The basic working principle of a single-cylinder four-stroke diesel engine: The diesel engine is started by rotating the diesel engine crankshaft through human power or other power to make the piston reciprocate up and down in the top closed cylinder. The piston completes four strokes during the movement: intake stroke, compression stroke, combustion and power stroke and exhaust stroke. When the piston moves from top to bottom, the intake valve opens, and the fresh air filtered by the air filter enters the cylinder to complete the intake stroke. The piston moves from bottom to top, and the intake and exhaust valves are closed. The air is compressed, the temperature and pressure increase, and the compression process is completed. When the piston is about to reach the top, the injector sprays the filtered fuel into the combustion chamber in the form of mist and mixes with the high-temperature and high-pressure air to immediately ignite and burn. The high pressure formed pushes the piston downward to work, pushes the crankshaft to rotate, and completes the power stroke. After the power stroke is completed, the piston moves from bottom to top, and the exhaust valve opens to exhaust, completing the exhaust stroke. The crankshaft rotates half a circle for each stroke. After several working cycles, the diesel engine gradually accelerates to work under the inertia of the flywheel. The rotation of the diesel engine crankshaft drives the generator to rotate and generate electricity. The generator has a DC generator and an AC generator. The DC generator is mainly composed of a generator The AC generator is composed of a shell, a pole core, a field coil, an armature and carbon brushes. The working principle of power generation is: when the diesel engine drives the generator armature to rotate, due to the residual magnetism of the generator's pole core, the armature coil cuts the magnetic lines of force in the magnetic field. According to the principle of electromagnetic induction, the magnetic induction generates current and outputs the current through the carbon brush. The AC generator is mainly made of magnetic materials with multiple permanent magnets (called rotors) with alternating north and south poles and made of silicon cast iron and wound with multiple groups of armature coils in series (called stators). The working principle of power generation is: the rotor is driven by the diesel engine to axially cut the magnetic lines of force, and the alternating magnetic poles in the stator form an alternating magnetic field in the coil core. When the rotor rotates one circle, the direction and size of the magnetic flux change many times. Due to the transformation of the magnetic field, an induced current with changing size and direction will be generated in the coil and the current will be transmitted by the stator coil.

[0004] From the working principle of the above diesel generator, it can be seen that the diesel generator will make a lot of noise when working, which will affect the workplace and living environment during actual use, so it needs to be silenced.

[0005] After searching, the Chinese patent application number 202122519810.6 discloses a silencer device for a diesel generator set, including an outer box body, a bottom plate is provided at the lower end of the outer box body, a shielding structure is provided on the front outer surface of the outer box body, an inner sound-absorbing cotton is provided along the inner wall of the inner side of the outer box body, a mounting plate is provided on the inner bottom surface of the outer box body, a shock-absorbing pad is provided between the lower outer surface of the mounting plate and the upper outer surface of the bottom plate, a connecting structure is provided on the upper outer surface of the mounting plate near the corner, and the mounting plate is connected to the bottom plate through the connecting structure; the above patent has the following shortcomings: the vibration transmission generated during the operation of the diesel generator set is reduced by the shock-absorbing pad, but the noise of the diesel generator set body during the operation is not eliminated, but transmitted outward through the box body, and no sound-absorbing effect is achieved.

[0006] At present, in the prior art, diesel generators are generally only provided with a box on the outside to isolate the sound. However, since solids are also a medium for sound propagation and the vibration of the box itself will also produce sound, the sound insulation effect of the diesel generator is not good.

[0007] Further search, Chinese patent application No. 201620527533.X discloses that the utility model relates to a silencing device for a diesel generator set, which includes a device body, an air inlet pipe is arranged on the left side of the device body, a connecting seat is welded on the left side of the air inlet pipe, an air outlet pipe is arranged on the right side of the device body, both the air inlet pipe and the air outlet pipe are provided with air diffusion holes, sound-absorbing baffles A and sound-absorbing baffles B are installed inside the device body, the sound-absorbing baffles A and sound-absorbing baffles B divide the device body into a first silencing chamber, a second silencing chamber and a third silencing chamber, a baffle is welded on the left side of the sound-absorbing baffle A, and silencing plates are arranged inside the second silencing chamber and the third silencing chamber, and sound-absorbing holes are arranged on the silencing plates; the above patent has the following shortcomings: multiple silencing baffles are used to reduce the noise generated during the operation of the diesel generator set, but due to the sealing of the box, the heat dissipation will be poor, and the higher the temperature, the stronger the sound intensity.

[0008] In order to silence the noise generated by the operation of the diesel generator set, a silencer device for the diesel generator set is proposed. Summary of the invention

[0009] In view of the above-mentioned shortcomings of the prior art, the present invention provides a silencing device for a diesel generator set, which can effectively solve the problem that the existing mine dust removal equipment does not clean completely, affecting the up and down movement of personnel and mine-related equipment.

[0010] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0011] The present invention provides a silencing device for a diesel generator set, comprising a silencing box body with the diesel generator set installed therein, the silencing box body being composed of an inner box body with an outer box body sleeved outside, and a cavity between the inner box body and the outer box body being subjected to vacuum treatment, so that a vacuum cavity is formed between the inner box body and the outer box body;

[0012] It also includes a silencer mechanism, including a plurality of silencer pipes arranged on the inner box body, the plurality of silencer pipes are distributed at different heights on the inner box body, the silencer pipe is composed of two symmetrically distributed folded pipes connected to each other, the number of the turning pipes of the silencer pipe is at least six, and a guide pipe is fixedly connected to the bottom of the silencer pipe;

[0013] And a silent pipe fixed at the bottom of the guide pipe, the silent pipe is spiral, a sound exhaust pipe is fixedly connected to the bottom of the silent pipe, the sound exhaust pipe leads to the outside, and a muffler is arranged at the outlet of the sound exhaust pipe.

[0014] Furthermore, the connection between the inner box and the outer box is at the door opening of the soundproof box, and sound insulation cotton is arranged in the gap between the door opening and the soundproof box; wire ducts are arranged at the tail of the inner box and the outer box; sound insulation cotton is arranged inside the wire ducts of the inner box and the outer box, and the wires pass through them to connect the diesel generator and external equipment.

[0015] Furthermore, a plurality of through-pipes are provided between the upper and lower sides of the outer box body, and the internal channels of the through-pipes are communicated with the external environment.

[0016] Furthermore, the inner box body and the outer box body are made of austenitic stainless steel.

[0017] Furthermore, a particle collector is installed at the sound inlet of the silencer pipe; a guide frame is installed at the tail of each turning pipe of the silencer pipe, and a plurality of guide blades are fixedly connected to the upper and lower sides of the guide frame; the guide blades are crescent-shaped.

[0018] Furthermore, activated carbon is arranged inside the guide vane in the turning duct in the front part of the silencer duct; the guide vane in the turning channel in the rear part of the silencer duct has an air inlet hole at the front end and an air outlet hole at the rear end, an inlet arc rod is arranged inside the guide vane near the air outlet hole, an outlet arc rod is arranged inside the guide vane near the air outlet hole, and a plurality of intermediate arc rods are arranged inside the guide vane; the arc shape of the inlet arc rod is to wrap the inlet hole, and the protruding direction is the gas entry direction, and the arc shape of the outlet arc rod is to wrap the outlet hole, and the protruding direction is the opposite direction of gas entry.

[0019] Furthermore, a silencer rubber tube is arranged inside the silent pipe, which is close to the inner wall of the silent pipe and distributed along the direction of the silent pipe; a plurality of directional grooves are processed on the inner wall of the silent pipe, and a spiral groove is processed inside the silent pipe, and the directional grooves and the spiral grooves are connected; a sponge is arranged inside the spiral groove.

[0020] Furthermore, a plurality of cooling pipes connected to an external water source are arranged on one side of the outer box body. The cooling pipes are spiral-shaped and fit with the spiral shape of the silent pipe.

[0021] Furthermore, a heat-conducting connecting rod is fixedly connected to the inner wall of the outer box, and the heat-conducting connecting rod is located at the spiral center of the silent pipe and the cooling pipe; a part of the heat-conducting connecting rod is located in the vacuum chamber for absorbing heat, and the other part is located in the external environment for dissipating heat.

[0022] Furthermore, the angle of the turning point of the silencer pipe is 45°; the turning point of the silencer pipe is an isosceles right triangle when viewed from above; and the aperture of the upper end of the guide pipe is larger than the aperture of the lower end.

[0023] Beneficial Effects

[0024] Compared with the known public technology, the technical solution provided by the present invention has the following beneficial effects:

[0025] The innovative point of the present invention is to perform vacuum treatment on the cavity between the inner box and the outer box, so that a vacuum cavity is formed between the inner box and the outer box, which prevents the transmission of sound waves, so that the sound waves can only be transmitted to the outside through the silencer pipe, thereby silencing the noise;

[0026] The turning point of the silencer pipe is viewed from above as an isosceles right triangle. This shape of the turning pipe can ensure that all sound waves are reflected by the plate at the hypotenuse of the isosceles right triangle and then reach the next pipe. The intensity of the sound waves can be reduced after multiple rounds of reflection.

[0027] The guide pipe is larger at the top and smaller at the bottom, so that the sound waves enter the small hole from the large hole, thereby achieving the purpose of reducing the sound;

[0028] The shapes of the inlet arc rod and the outlet arc rod in the guide vane can cause a large amount of reflection and diffraction when the sound waves enter through the inlet hole of the guide vane and exit through the outlet hole of the guide vane, thereby reducing the intensity of the sound waves, that is, achieving the process of silencing;

[0029] The rubber material of the silencer rubber tube can absorb sound waves. The silencer rubber tube is close to the inner wall of the silent pipe so that it can also reflect and diffract the sound waves. At the same time, the directional grooves and spiral grooves inside it can increase the reflection and diffraction of sound waves, further reducing the intensity of the sound. The sponge inside the spiral groove can also absorb the sound.

[0030] The cooling pipe that fits the spiral of the silent pipe has a large contact area with the silent pipe, and the spiral cooling pipe has a large water capacity, which improves the heat dissipation effect of the silent pipe and can also absorb the heat in the vacuum chamber.

[0031] The staff can use a fan or place dry ice on the outer rod of the heat-conducting connecting rod to speed up the heat dissipation of the outer rod of the heat-conducting connecting rod. The heat-conducting connecting rod is located in the middle of the spiral, and its main function is to absorb the heat inside the silent pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 It is a schematic diagram of the overall structure of the sound-absorbing box of the present invention;

[0034] Figure 2 It is a schematic diagram of the structure between the inner box body and the outer box body of the present invention;

[0035] Figure 3 It is a schematic diagram of the structure of the muffler mechanism of the present invention;

[0036] Figure 4 It is a schematic diagram of the explosion structure of the silencer mechanism of the present invention;

[0037] Figure 5 It is a schematic diagram of the explosion structure of the muffler pipe of the present invention;

[0038] Figure 6 It is a schematic diagram of the explosion structure of the flow guide frame of the present invention;

[0039] Figure 7 A schematic diagram of the structure of the guide vane of the present invention from a top view;

[0040] Figure 8 A schematic diagram of the cross-sectional structure of the sound-absorbing rubber tube of the present invention;

[0041] Fig. 9 A schematic diagram of the structure of the silencer pipe from top view of the present invention.

[0042] Reference numerals

[0043] 100-silencer box; 101-inner box; 102-outer box; 103-through-pipe;

[0044] 200-silencer pipe; 201-particle collector; 202-guide pipe; 203-cooling pipe; 204-heat-conducting connecting rod; 210-silencer pipe; 211-sound exhaust pipe; 212-silencer rubber tube; 213-spiral groove; 214-pointing groove; 220-guide frame; 221-guide blade; 222-inlet arc rod; 223-middle arc rod; 224-outlet arc rod. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution 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 part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] The present invention will be further described below in conjunction with the embodiments.

[0047] Example:

[0048] A silencing device for a diesel generator set, such as Figure 1-8 As shown, it includes a muffler box 100 with a diesel generator set installed inside, and the muffler box 100 is composed of an inner box 101 with an outer box 102 sleeved on the outside. Specifically, the connection between the inner box 101 and the outer box 102 is at the door opening of the muffler box 100, and sound insulation cotton is arranged in the gap between the door opening and the muffler box 100, and a large number of sound insulation components are arranged inside the door opening. At the same time, the diesel generator is placed deep inside the muffler box 100 and away from the door, so as to minimize the inevitable sound wave propagation without hindering the disassembly and maintenance of the diesel generator; wire ducts are arranged at the tail of the inner box 101 and the outer box 102. It is worth noting that a large number of sound insulation cottons are also arranged inside the wire ducts of the inner box 101 and the outer box 102, and wires pass through them to connect the diesel generator and external equipment;

[0049] The box body formed by the outer box body 102 being sleeved on the outer side of the inner box body 101 makes it possible for the sound generated by the diesel generator inside to be transmitted after double barriers, thereby reducing the noise. However, since the box body and the air are both media for sound transmission, the noise is not eliminated. In order to prevent the propagation of sound waves, the sound cannot be transmitted far away in a vacuum. In this embodiment, the cavity between the inner box body 101 and the outer box body 102 is vacuum-treated, so that a vacuum cavity is formed between the inner box body 101 and the outer box body 102 to prevent the transmission of sound waves, so that the sound waves can only be transmitted to the outside through the silencer pipe 200, thereby silencing the noise. Specifically, a vacuum pipe is provided on one side of the outer box body 102, and the space between the inner box body 101 and the outer box body 102 is vacuum-treated by a vacuum machine. In order to meet the vacuum between the inner box body 101 and the outer box body 102, the material of the inner box body 101 and the outer box body 102 is austenitic stainless steel.

[0050] In addition, although sound cannot propagate in a vacuum, heat can be transferred in a vacuum by means of thermal radiation, so that the heat inside the muffler box 100 can be dissipated; in order to better spread the heat, a plurality of through pipes 103 are arranged between the upper and lower sides of the outer box 102, and the internal channels of the through pipes 103 are connected to the external environment. It is worth noting that the heat generated by the diesel generator set is transferred to the inner box 101, and then transferred through the vacuum cavity by means of thermal radiation. At this time, the through pipes 103 can absorb the heat and exchange heat with the outside world. At the same time, the staff can also inject cooling water into the through pipes 103 to further improve the efficiency of heat exchange;

[0051] The silencing mechanism also includes a plurality of silencing pipes 200 arranged on the inner box 101, the plurality of silencing pipes 200 are distributed at different heights on the inner box 101, the silencing pipes 200 are composed of two symmetrically distributed folded pipes connected to each other, and the number of the turning pipes of the silencing pipes 200 is at least six (such as Fig. 9 As shown, there are four dotted lines in the figure, and there are two in the middle, where the two turning pipes are directed downward), the angle of the turning point of the silencer pipe 200 is 45°. Specifically, the turning point of the silencer pipe 200 is viewed from above as an isosceles right triangle. The turning pipe of this shape can ensure that all sound waves are reflected by the plate at the hypotenuse of the isosceles right triangle, and then all reach the next pipe. The sound waves can reduce their intensity after multiple rounds of reflection; a guide pipe 202 is fixedly connected to the bottom of the silencer pipe 200, and the aperture of the upper end of the guide pipe 202 is larger than the aperture of the lower end. It is worth noting that the guide pipe 202 is larger at the top and smaller at the bottom, so that the sound waves enter the small hole from the large hole, thereby achieving the purpose of reducing the sound;

[0052] And a silent pipe 210 fixed at the bottom of the guide pipe 202, the silent pipe 210 is spiral, a sound exhaust pipe 211 is fixedly connected to the bottom of the silent pipe 210, the sound exhaust pipe 211 leads to the outside, and a muffler is arranged at the outlet of the sound exhaust pipe 211. It is worth noting that the spiral shape of the silent pipe 210 helps the sound waves to have a large amount of reflection and diffraction therein, thereby reducing the intensity of the sound. The muffler at the outlet of the sound exhaust pipe 211 is a prior art and will not be repeated here. The muffler is the last link of the present muffler device, and the sound transmitted through it is almost inaudible;

[0053] Furthermore, a particle collector 201 is installed at the sound inlet of the silencer pipe 200. It is worth mentioning that the particle collector 201 can absorb impurities generated by the diesel generator set during operation to prevent them from affecting the subsequent sound silencing treatment. A guide frame 220 is installed at the tail end of each turning pipe of the silencer pipe 200. A plurality of guide blades 221 are fixedly connected on the upper and lower sides of the guide frame 220. The guide blades 221 are crescent-shaped. Activated carbon is arranged inside the guide blades 221 in the turning pipe of the front part of the silencer pipe 200. It is worth mentioning that the guide blades can prevent the air from generating vortices at sharp turns, resulting in poor airflow and noise. The guide blades 221 in the front part can further absorb tiny impurities in the gas; The guide blade 221 in the channel has an air inlet at the front end and an air outlet at the rear end. An inlet arc rod 222 is arranged near the air outlet inside the guide blade 221, and an outlet arc rod 224 is arranged near the air outlet inside the guide blade 221. A plurality of intermediate arc rods 223 are arranged inside the guide blade 221. Specifically, the arc shape of the inlet arc rod 222 is to wrap the inlet, and the protruding direction is the gas entry direction. The arc shape of the outlet arc rod 224 is to wrap the outlet, and the protruding direction is the opposite direction of the gas entry. It should be further explained that the shapes of the inlet arc rod 222 and the outlet arc rod 224 can make a large amount of reflection and diffraction occur when the sound wave or gas enters through the inlet of the guide blade 221 and is discharged from the outlet of the guide blade 221, thereby reducing the intensity of the sound wave, that is, realizing the process of silencing.

[0054] Furthermore, a sound-absorbing rubber tube 212 is provided inside the silent pipe 210. The sound-absorbing rubber tube 212 is close to the inner wall of the silent pipe 210 and is distributed along the direction of the silent pipe 210. A plurality of directional grooves 214 are processed on the inner wall of the silent pipe 210. A spiral groove 213 is processed inside the silent pipe 210. The directional grooves 214 and the spiral grooves 213 are connected. A sponge is provided inside the spiral groove 213. It should be noted that the rubber material of the sound-absorbing rubber tube 212 can absorb sound waves. The sound-absorbing rubber tube 212 is close to the inner wall of the silent pipe 210 so that it can also reflect and diffract the sound waves. At the same time, the directional grooves 214 and the spiral grooves 213 inside it can increase the reflection and diffraction of the sound waves, further reducing the intensity of the sound. The sponge inside the spiral groove 213 can also absorb the sound. It can be understood that the stage of the silent pipe 210 is the strongest link for eliminating the sound in this embodiment.

[0055] At the same time, it should be noted that since the higher the temperature, the stronger the sound, it is necessary to cool the equipment in the silencer mechanism. A plurality of cooling pipes 203 connected to an external water source are arranged on one side of the outer box 102. The cooling pipes 203 are spirally shaped and fit with the spiral shape of the silent pipe 210. It is worth noting that the cooling pipes 203 that fit with the spiral of the silent pipe 210 have a large contact area with the silent pipe 210, and the spiral cooling pipe 203 has a large water capacity, which improves the heat dissipation effect of the silent pipe 210 and can also dissipate the heat in the vacuum chamber. The inner wall of the outer box 102 is fixedly connected with a heat-conducting connecting rod 204, which is located at the spiral center of the silent pipe 210 and the cooling pipe 203. A part of the heat-conducting connecting rod 204 is located in the vacuum chamber for absorbing heat, and the other part is located in the external environment for dissipating heat. Specifically, the staff can use a fan or place dry ice on the outer rod of the heat-conducting connecting rod 204 to accelerate the heat dissipation of the outer rod of the heat-conducting connecting rod 204. The heat-conducting connecting rod 204 is located in the middle of the spiral, and its main function is to absorb the heat inside the silent pipe 210;

[0056] In this embodiment, during the preparation stage, the staff installs the diesel generator set deep inside the muffler box 100, checks the condition of the diesel generator set, connects the wires through the wire duct after the diesel generator set is complete, and checks the air tightness and sound insulation effect at the wire duct, then installs the particle collector 201 at the air inlet of the muffler duct 200, closes the door of the muffler box 100 after the installation is complete, and checks the air tightness and sound insulation effect at the door of the muffler box 100 again, and after the inspection is completed, connects the external water source to the cooling pipe 203, and puts dry ice on the external rod body of the heat-conducting connecting rod 204, and finally starts the diesel generator set to work;

[0057] During the working stage, since a closed space is formed inside the inner box 101, impurities generated by the diesel generator set can only enter the particle collector 201 and be captured. In addition, since there is a vacuum gun between the inner box 101 and the outer box 102, the noise generated by the diesel generator set enters the silencer duct 200 through the particle collector 201. The noise is reflected and deflected in multiple turning ducts of the silencer duct 200, thereby reducing the intensity of the noise. At the same time, the guide vanes 221 inside the silencer duct 200 guide the noise to prevent the air from generating vortices at sharp turns, resulting in poor airflow and noise. In addition, the activated carbon inside the guide vanes 221 at the front part of the silencer duct 200 can further absorb impurities in the airflow, thereby avoiding During the subsequent transmission process, it collides with the silencer mechanism to generate noise. The guide vane 221 in the rear part uses the inlet arc rod 222, the middle arc rod 223, and the outlet arc rod 224 in its own structure to strengthen the reflection and diffraction of the sound waves, further weakening the intensity of the sound waves. The sound waves enter the guide pipe 202 through the silencer pipe 200 and are guided to the silent pipe 210 with a smaller aperture. The spiral shape of the silent pipe 210 itself and the silencer rubber tube 212 inside it, as well as the spiral groove 213 and the directional groove 214 in the silencer rubber tube 212, further reduce the noise of the sound waves and enhance the silencer effect. Finally, the sound waves are transmitted to the external environment through the silencer at the sound exhaust pipe 211, and the sound is almost inaudible at this time.

[0058] During operation, the water inside the spiral cooling pipe 203 absorbs the heat in the silent pipe 210 and the vacuum cavity between the inner box 101 and the outer box 102. The heat-conducting connecting rod 204 located in the vacuum cavity absorbs the heat in the silent pipe 210 and the vacuum cavity and dissipates the heat through the heat-conducting connecting rod 204 located in the external environment. Dry ice accelerates the heat dissipation efficiency. At the same time, the staff adds flowing cooling water to the through pipe 103 to further reduce the temperature inside the silencer box 100 and avoid the effect of high intensity of sound due to high temperature.

[0059] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A silencing device for a diesel generator set, characterized in that: include: A sound-absorbing box (100) of a diesel generator set is installed inside the box. The sound-absorbing box (100) is composed of an inner box (101) which is sleeved with an outer box (102). The cavity between the inner box (101) and the outer box (102) is vacuum-treated so that a vacuum cavity is formed between the inner box (101) and the outer box (102); It also includes a silencer mechanism, including a plurality of silencer pipes (200) arranged on the inner box (101), the plurality of silencer pipes (200) being distributed at different heights on the inner box (101), the silencer pipe (200) being composed of two symmetrically distributed folded pipes communicating with each other, the number of the turning pipes of the silencer pipe (200) being at least six, and a guide pipe (202) being fixedly connected to the bottom of the silencer pipe (200); and a silent pipe (210) fixed at the bottom of the guide pipe (202); the silent pipe (210) is spiral-shaped; a sound exhaust pipe (211) is fixedly connected to the bottom of the silent pipe (210); the sound exhaust pipe (211) leads to the outside; and a muffler is arranged at the outlet of the sound exhaust pipe (211).

2. A silencing device for a diesel generator set according to claim 1, characterized in that: The connection between the inner box body (101) and the outer box body (102) is at the door opening of the sound-absorbing box body (100), and sound insulation cotton is arranged in the gap between the door opening and the sound-absorbing box body (100); The tails of the inner box (101) and the outer box (102) are provided with electric wire ducts; The wire ducts of the inner box (101) and the outer box (102) are provided with sound insulation cotton inside, through which the wires pass to connect the diesel generator and external equipment.

3. A silencing device for a diesel generator set according to claim 2, characterized in that: A plurality of through-pipes (103) are arranged between the upper and lower sides of the outer box body (102), and the internal channels of the through-pipes (103) are in communication with the external environment.

4. A silencing device for a diesel generator set according to claim 3, characterized in that: The material of the inner box body (101) and the outer box body (102) is austenitic stainless steel.

5. A silencing device for a diesel generator set according to claim 1, characterized in that: A particle collector (201) is installed at the sound inlet of the silencer pipe (200); A flow guide frame (220) is installed at the tail of each turning pipe of the silencer pipe (200), and a plurality of flow guide blades (221) are fixedly connected to the upper and lower sides of the flow guide frame (220); The guide vane (221) is crescent-shaped.

6. A silencing device for a diesel generator set according to claim 5, characterized in that: Activated carbon is arranged inside the guide vane (221) in the turning duct at the front part of the muffler duct (200); The guide vane (221) in the turning channel at the rear portion of the muffler pipe (200) has an air inlet at the front end and an air outlet at the rear end; an inlet arc rod (222) is arranged near the air outlet inside the guide vane (221); an outlet arc rod (224) is arranged near the air outlet inside the guide vane (221); and a plurality of intermediate arc rods (223) are arranged inside the guide vane (221); The arc shape of the inlet arc rod (222) is to wrap around the air inlet, and the protruding direction is the gas inlet direction; the arc shape of the outlet arc rod (224) is to wrap around the air outlet, and the protruding direction is the opposite direction of the gas inlet.

7. A silencing device for a diesel generator set according to claim 1, characterized in that: A sound-absorbing rubber tube (212) is arranged inside the sound-absorbing pipe (210), and the sound-absorbing rubber tube (212) is closely attached to the inner wall of the sound-absorbing pipe (210) and is distributed along the direction of the sound-absorbing pipe (210); The inner wall of the silent pipe (210) is processed with a plurality of directional grooves (214), and the interior of the silent pipe (210) is processed with a spiral groove (213), and the directional grooves (214) and the spiral grooves (213) are in communication; A sponge is arranged inside the spiral groove (213).

8. A silencing device for a diesel generator set according to claim 7, characterized in that: A plurality of cooling pipes (203) connected to an external water source are arranged on one side of the outer box body (102); the cooling pipes (203) are spiral-shaped and fit in with the spiral shape of the silent pipe (210).

9. A silencing device for a diesel generator set according to claim 8, characterized in that: A heat-conducting connecting rod (204) is fixedly connected to the inner wall of the outer box body (102), and the heat-conducting connecting rod (204) is located at the spiral center of the silent pipe (210) and the cooling pipe (203); A portion of the heat-conducting connecting rod (204) is located in the vacuum chamber for absorbing heat, and another portion is located in the external environment for dissipating heat.

10. A silencing device for a diesel generator set according to claim 1, characterized in that: The angle of the turning point of the muffler pipe (200) is 45°; The turning point of the silencer pipe (200) is an isosceles right triangle when viewed from above; the aperture of the upper end of the guide pipe (202) is larger than the aperture of the lower end.

Images