Diesel generator with mute device

Abstract

The utility model discloses a diesel generator with a mute device, which comprises a diesel generator main body, a sound insulation cover component covered outside the diesel generator main body, a sound absorption box arranged at the tail end of a waste gas exhaust pipeline of the diesel generator main body, a spiral pipe arranged in a sound absorption cavity of the sound absorption box, and an air inlet end of the spiral pipe connected with the waste gas exhaust pipeline. A plurality of air outlet holes are formed in the upper surface of the spiral pipe in the spiral direction and communicated with a sound absorption cavity of the sound absorption box, a sound absorption frame is arranged on the periphery of the spiral pipe, an oil collecting box is fixedly arranged at the bottom of the sound absorption box, and the bottom of the spiral pipe is communicated with an inner cavity of the oil collecting box. The utility model has the following advantages and effects: the scheme utilizes a new mechanical structure, has multi-stage noise reduction, improves the noise reduction performance, and has the effects of noise reduction and oil collection.

Description

Technical Field

[0001] This utility model relates to the field of diesel generator technology, and in particular to a diesel generator with a noise reduction device. Background Technology

[0002] A diesel generator is a small power generation device that uses diesel fuel and a diesel engine as the prime mover to drive a generator to generate electricity.

[0003] However, the promotion of diesel generators has also brought about many problems. During the power generation process, diesel generators produce a lot of noise due to the combustion of diesel fuel mixed with air. This noise is emitted directly through the exhaust pipe, causing noise pollution. At the same time, the exhaust gas contains some oil stains and dirt, which cause environmental pollution. These issues urgently need to be addressed. Utility Model Content

[0004] The purpose of this invention is to provide a diesel generator with a noise reduction device, which has the effects of multi-stage noise reduction to improve noise reduction performance, and also has the functions of noise reduction and fuel collection.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a diesel generator with a noise reduction device, comprising a diesel generator body, wherein the diesel generator body is provided with a clean air intake pipe and an exhaust gas discharge pipe, the diesel generator body is covered with a sound insulation cover assembly, the sound insulation cover assembly is provided with an air inlet and an air outlet, the air inlet is connected to the air inlet end of the clean air intake pipe, and a sound-absorbing box is connected between the exhaust gas discharge pipe and the air outlet;

[0006] The sound-absorbing box is provided with a sound-absorbing cavity, an air inlet pipe, and an air outlet pipe. The air outlet end of the exhaust pipe is connected to the sound-absorbing cavity through the air inlet pipe, and the bottom of the sound-absorbing cavity is connected to the air outlet through the air outlet pipe. A spiral tube is provided inside the sound-absorbing cavity. The air inlet end of the spiral tube is connected to the air inlet pipe. Several air outlet holes are opened on the upper surface of the spiral tube along the spiral direction. A sound-absorbing frame is provided around the spiral tube. Several through holes are opened on the four side walls of the sound-absorbing frame. The air inlet end of the air outlet pipe is arranged outside the sound-absorbing frame. An oil collection box is fixed at the bottom of the sound-absorbing box, and the bottom of the spiral tube is connected to the inner cavity of the oil collection box.

[0007] By adopting the above technical solution, the noise and exhaust gas generated by the diesel generator body during use will enter the spiral tube of the sound absorption box through the exhaust pipe and intake pipe. Oil stains and dirt will adhere to the inner wall of the spiral tube, and finally form oil that slides down the inner wall of the spiral tube into the oil collection box for collection. The noise enters the sound absorption cavity inside the sound absorption frame through the air outlet on the upper surface of the spiral tube. After being absorbed by the sound absorption frame, the noise enters the sound absorption cavity outside the sound absorption frame through the through hole for further noise reduction, and then is discharged from the air outlet along the air outlet pipe. In addition, the diesel generator body is built into the sound insulation cover assembly during use. The sound insulation cover assembly can isolate the noise generated by the diesel generator body to achieve the purpose of noise reduction. This utility model has the effect of multi-level noise reduction, improving noise reduction performance, and combining noise reduction and oil collection functions.

[0008] A further feature of this invention is that the spiral tube is covered with at least one layer of spiral sound-absorbing sleeve made of flexible sound-absorbing sponge material.

[0009] By adopting the above technical solution, the spiral sound-absorbing sleeve made of flexible sound-absorbing sponge can be more easily fitted onto the outer wall of the spiral tube, and at the same time, the spiral sound-absorbing sleeve can absorb and reduce the noise emitted from the air outlet.

[0010] A further feature of this invention is that the sound-absorbing box is provided with a partition around the sound-absorbing frame, the partition isolating the sound-absorbing cavity area outside the sound-absorbing frame to form a meandering airway, and the air inlet end of the air outlet pipe is connected to the end of the meandering airway.

[0011] By adopting the above technical solution, the bypass airway can reflect the noise entering it multiple times, thereby canceling out some of the noise. Finally, the small amount of noise is discharged from the exhaust pipe at the end of the bypass airway along with the exhaust gas.

[0012] A further feature of this invention is that the sidewall of the partition extends at an incline toward the meandering airway and has several sound-absorbing blocks.

[0013] By adopting the above technical solution, the noise reduction block can reduce noise in the winding airway and improve the noise reduction performance of this utility model.

[0014] A further feature of this invention is that the sound-absorbing box includes a bottom shell and a top cover, the top cover and the bottom shell being closed together to form the sound-absorbing cavity, and the top cover being locked and fixed to the bottom shell by screws.

[0015] By adopting the above technical solution, the top cover can be detachably installed on the bottom shell, which facilitates the disassembly, assembly, and cleaning of the spiral tube.

[0016] A further feature of this invention is that: an oil drain pipe is provided at the bottom of the oil collection box, a liquid level alarm is provided on the side of the oil collection box, and an oil drain ball valve is provided on the oil drain pipe.

[0017] By adopting the above technical solution, the liquid level alarm can monitor the liquid level in the oil collection box in real time and issue an alarm in a timely manner. When draining oil, simply open the drain ball valve to drain the oil in the oil collection box through the drain pipe.

[0018] A further feature of this invention is that the soundproof cover assembly includes a fixed cover and a movable cover, and the fixed cover and the movable cover are locked together by a locking structure.

[0019] By adopting the above technical solution, the movable cover can be quickly installed on the fixed cover through the locking structure, and it is also convenient to quickly remove the movable cover from the fixed cover.

[0020] A further feature of this invention is that the fixed cover has an installation opening corresponding to the movable cover, and the installation opening has a sealing ring. The side projection of the sealing ring has an L-shaped structure. When the movable cover is locked and installed on the installation opening of the fixed cover, the movable cover is sealed and fitted with the fixed cover through the sealing ring.

[0021] By adopting the above technical solution, the sealing ring can improve the dustproof and waterproof performance and sound insulation effect between the movable cover and the fixed cover.

[0022] A further feature of this invention is that the soundproof cover assembly is provided with a silencing box at the air outlet end of the air outlet, the silencing box is filled with sound-absorbing cotton, and the silencing box is provided with an exhaust hole that communicates with the air outlet.

[0023] By adopting the above technical solution, the silencer box can further reduce the noise at the air outlet, thereby improving the noise reduction performance of this utility model.

[0024] A further feature of this invention is that a primary composite filtration device is provided on the exhaust gas discharge pipe.

[0025] By adopting the above technical solution, the primary composite filtration device can perform primary filtration and adsorption on the exhaust gas before it enters the sound absorption box.

[0026] In summary, this utility model has the following beneficial effects:

[0027] A soundproof enclosure is installed around the diesel generator body. A sound-absorbing box is installed at the end of the exhaust pipe of the diesel generator body. A spiral tube is installed inside the sound-absorbing cavity of the sound-absorbing box. The air inlet end of the spiral tube is connected to the exhaust pipe. Several air outlets are opened along the spiral direction on the upper surface of the spiral tube, and the air outlets are connected to the sound-absorbing cavity of the sound-absorbing box. A sound-absorbing frame is installed around the spiral tube. An oil collection box is fixed at the bottom of the sound-absorbing box. The bottom of the spiral tube is connected to the inner cavity of the oil collection box. During use, the noise and exhaust gas generated by the diesel generator body will enter the spiral tube of the sound-absorbing box through the exhaust pipe and the air inlet pipe. Oil stains and dirt will adhere to the spiral tube. The oil adheres to the inner wall of the spiral tube and eventually slides down the inner wall of the spiral tube into the oil collection box for collection. Noise enters the sound absorption chamber inside the sound absorption frame from the air outlet on the upper surface of the spiral tube. After being absorbed by the sound absorption frame, the noise enters the sound absorption chamber outside the sound absorption frame through the through hole for further noise reduction. Then, it is discharged from the air outlet along the air outlet pipe. In addition, the main body of the diesel generator is built into the sound insulation cover assembly during use. The sound insulation cover assembly can isolate the noise generated by the main body of the diesel generator to achieve the purpose of noise reduction. This makes the present invention have the effect of multi-level noise reduction, improving noise reduction performance, and combining noise reduction and oil collection functions. Attached Figure Description

[0028] Figure 1 This is a view of the soundproof enclosure assembly of this utility model installed outside the main body of the diesel generator; the muffler box is not shown.

[0029] Figure 2 This is a utility model Figure 1 The view after the movable cover is removed, and the silencer box is installed at the air outlet position of the fixed cover.

[0030] Figure 3 This is a structural diagram of the oil collection box of this utility model installed at the bottom of the muffler box.

[0031] Figure 4 This is a utility model Figure 3 Exploded view.

[0032] Figure 5 This is a top view of the silencer box of this utility model; the top cover is not shown.

[0033] Figure 6 This is a utility model Figure 3 A longitudinal sectional view.

[0034] In the diagram: 1. Diesel generator body; 11. Clean air intake pipe; 12. Exhaust gas discharge pipe; 121. Primary composite filter device; 2. Soundproof cover assembly; 21. Fixed cover; 211. Air inlet; 212. Air outlet; 213. Mounting port; 214. Sealing ring; 215. Silencer box; 2151. Exhaust port; 22. Movable cover; 23. Locking structure; 3. Sound absorption box; 301. Bottom shell; 302. Top cover; 31. Sound absorption cavity; 32. Air inlet pipe; 33. Air outlet pipe; 34. Spiral tube; 341. Air outlet hole; 35. Sound absorption frame; 351. Through hole; 36. Spiral sound absorption sleeve; 37. Partition plate; 371. Detour air passage; 372. Silencer block; 4. Oil collection box; 41. Oil drain pipe; 42. Liquid level alarm; 43. Oil drain ball valve. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings.

[0036] A diesel generator with a noise reduction device, such as Figures 1-5 As shown, the device includes a diesel generator body 1, which has a clean air intake pipe 11 and an exhaust gas exhaust pipe 12. A soundproof enclosure assembly 2 is provided over the diesel generator body 1. The soundproof enclosure assembly 2 has an air inlet 211 and an air outlet 212. The air inlet 211 is connected to the air inlet end of the clean air intake pipe 11. A sound-absorbing box 3 is connected between the exhaust gas exhaust pipe 12 and the air outlet 212. The sound-absorbing box 3 has a sound-absorbing cavity 31, an air inlet pipe 32, and an air outlet pipe 33. The air outlet end of the exhaust gas exhaust pipe 12 is connected to the sound-absorbing cavity 31 through the air inlet pipe 32. The bottom of the sound-absorbing cavity 31 is connected to the air outlet 212 through the air outlet pipe 33. A spiral tube 34 is provided inside the sound-absorbing cavity 31. The air inlet end of the spiral tube 34 is connected to the air inlet pipe 32. Several air outlets are formed along the spiral direction on the upper surface of the spiral tube 34. The spiral tube 34 is surrounded by a sound-absorbing frame 35. Several through holes 351 are opened on the four side walls of the sound-absorbing frame 35. The air inlet end of the air outlet pipe 33 is arranged outside the sound-absorbing frame 35. An oil collection box 4 is fixed at the bottom of the sound-absorbing box 3. The bottom of the spiral tube 34 is connected to the inner cavity of the oil collection box 4. The sound insulation cover assembly 2 is connected to the air outlet 212 and a silencer box 215 is provided. The silencer box 215 is filled with sound-absorbing cotton and has an exhaust hole 2151 connected to the air outlet 212. The silencer box 215 can further reduce the noise at the air outlet 212 and improve the noise reduction performance of this utility model. A primary composite filter device 121 is provided on the exhaust pipe 12. The primary composite filter device 121 can perform primary filtration and adsorption on the exhaust gas before it enters the sound-absorbing box 3.

[0037] like Figures 4-5As shown, the spiral tube 34 is covered with at least one layer of spiral sound-absorbing sleeve 36 made of flexible sound-absorbing sponge material. The spiral sound-absorbing sleeve 36 made of flexible sound-absorbing sponge can be more easily fitted onto the outer wall of the spiral tube 34. At the same time, the spiral sound-absorbing sleeve 36 can absorb and reduce the noise discharged from the air outlet 341. The sound-absorbing box 3 has a partition 37 around the sound-absorbing frame 35. The partition 37 isolates the sound-absorbing cavity 31 area outside the sound-absorbing frame 35 to form a detour airway 371. The air inlet end of the air outlet pipe 33 is connected to the end of the detour airway 371. The detour airway 371 can reflect the noise entering it multiple times, thereby canceling out some of the noise. Finally, a small amount of noise is discharged from the air outlet pipe 33 at the end of the detour airway 371 with the exhaust gas. Several sound-absorbing blocks 372 extend obliquely from the side wall of the partition 37 toward the detour airway 371. The sound-absorbing blocks 372 can reduce the noise in the detour airway 371 and improve the noise reduction performance of this utility model.

[0038] like Figures 2-5 As shown, the sound-absorbing box 3 includes a bottom shell 301 and a top cover 302. The top cover 302 and the bottom shell 301 are closed to form a sound-absorbing cavity 31. The top cover 302 is fixed to the bottom shell 301 by screws, so that the top cover 302 can be detached and installed on the bottom shell 301, which facilitates the disassembly, assembly and cleaning of the spiral tube 34. The bottom of the oil collection box 4 is provided with an oil drain pipe 41, and the side of the oil collection box 4 is provided with a liquid level alarm 42. The oil drain pipe 41 is provided with an oil drain ball valve 43. The liquid level alarm 42 can monitor the liquid level in the oil collection box 4 in real time and alarm in time. When draining oil, simply open the oil drain ball valve 43 to drain the oil in the oil collection box 4 through the oil drain pipe 41. The sound insulation cover assembly 2 includes a fixed cover 21 and a movable cover 2. 2. The fixed cover 21 and the movable cover 22 are locked together by a locking structure 23, which allows the movable cover 22 to be quickly installed on the fixed cover 21 and also facilitates quick removal of the movable cover 22 from the fixed cover 21. The fixed cover 21 has an installation port 213 corresponding to the movable cover 22, and the installation port 213 is equipped with a sealing ring 214. The side projection of the sealing ring 214 is L-shaped. When the movable cover 22 is locked and installed on the installation port 213 of the fixed cover 21, the movable cover 22 is sealed with the fixed cover 21 through the sealing ring 214. The sealing ring 214 can improve the dustproof and waterproof performance and sound insulation effect between the movable cover 22 and the fixed cover 21.

[0039] The basic working principle of this utility model is as follows: A soundproof cover assembly 2 is installed on the outside of the diesel generator body 1. A sound-absorbing box 3 is installed at the tail end of the exhaust gas discharge pipe 12 of the diesel generator body 1. A spiral tube 34 is installed in the sound-absorbing cavity 31 of the sound-absorbing box 3. The air inlet end of the spiral tube 34 is connected to the exhaust gas discharge pipe 12. Several air outlet holes 341 are opened along the spiral direction on the upper surface of the spiral tube 34. The air outlet holes 341 are connected to the sound-absorbing cavity 31 of the sound-absorbing box 3. A sound-absorbing frame 35 is provided around the spiral tube 34. An oil collection box 4 is fixed at the bottom of the sound-absorbing box 3. The bottom of the spiral tube 34 is connected to the inner cavity of the oil collection box 4. When in use, the noise and exhaust gas generated by the diesel generator body 1 will enter the sound-absorbing box 3 through the exhaust gas discharge pipe 12 and the air inlet pipe 32. In the spiral tube 34, oil stains and dirt will adhere to the inner wall of the spiral tube 34, eventually forming oil that slides down the inner wall of the spiral tube 34 and is collected in the oil collection box 4. Noise enters the sound absorption cavity 31 inside the sound absorption frame 35 from the air outlet 341 on the upper surface of the spiral tube 34. After being absorbed by the sound absorption frame 35, the noise enters the sound absorption cavity 31 outside the sound absorption frame 35 through the through hole 351 for further noise reduction, and then is discharged from the air outlet 212 along the air outlet pipe 33. In addition, when in use, the diesel generator body 1 is built into the sound insulation cover assembly 2. The sound insulation cover assembly 2 can isolate the noise generated by the diesel generator body 1 to achieve the purpose of noise reduction. This makes the present invention have the effect of multi-level noise reduction, improved noise reduction performance, and combined noise reduction and oil collection functions.

[0040] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A diesel generator with a noise reduction device, comprising a diesel generator body (1), wherein the diesel generator body (1) is provided with a clean air intake pipe (11) and an exhaust gas discharge pipe (12), characterized in that: The main body (1) of the diesel generator is covered with a soundproof cover assembly (2). The soundproof cover assembly (2) is provided with an air inlet (211) and an air outlet (212). The air inlet (211) is connected to the air inlet end of the clean air intake pipe (11). A sound-absorbing box (3) is connected between the exhaust gas discharge pipe (12) and the air outlet (212). The sound-absorbing box (3) is provided with a sound-absorbing cavity (31), an air inlet pipe (32), and an air outlet pipe (33). The air outlet end of the exhaust gas discharge pipe (12) is connected to the sound-absorbing cavity (31) through the air inlet pipe (32), and the bottom of the sound-absorbing cavity (31) is connected to the air outlet (212) through the air outlet pipe (33). A spiral tube (34) is provided inside the sound-absorbing cavity (31), and the air inlet end of the spiral tube (34) is connected to the air inlet pipe (32). The upper surface of the spiral tube (34) is provided with several air outlets (341) along the spiral direction. The spiral tube (34) is surrounded by a sound-absorbing frame (35). Several through holes (351) are provided on the four side walls of the sound-absorbing frame (35). The air inlet of the air outlet tube (33) is arranged outside the sound-absorbing frame (35). An oil collection box (4) is fixed at the bottom of the sound-absorbing box (3). The bottom of the spiral tube (34) is connected to the inner cavity of the oil collection box (4).

2. A diesel generator with a noise reduction device according to claim 1, characterized in that: The spiral tube (34) is covered with at least one layer of spiral sound-absorbing sleeve (36) made of flexible sound-absorbing sponge material.

3. A diesel generator with a noise reduction device according to claim 1, characterized in that: The sound-absorbing box (3) has a partition (37) around the sound-absorbing frame (35). The partition (37) isolates the sound-absorbing cavity (31) area outside the sound-absorbing frame (35) to form a detour airway (371). The air inlet of the air outlet pipe (33) is connected to the end of the detour airway (371).

4. A diesel generator with a noise reduction device according to claim 3, characterized in that: The sidewall of the partition (37) extends at an angle toward the meandering airway (371) and has several sound-absorbing blocks (372).

5. A diesel generator with a noise reduction device according to claim 1, characterized in that: The sound-absorbing box (3) includes a bottom shell (301) and a top cover (302). The top cover (302) and the bottom shell (301) are closed to form the sound-absorbing cavity (31), and the top cover (302) is locked and fixed to the bottom shell (301) by screws.

6. A diesel generator with a noise reduction device according to claim 1, characterized in that: The oil collection box (4) is provided with an oil drain pipe (41) at the bottom, and a liquid level alarm (42) is provided on the side of the oil collection box (4). An oil drain ball valve (43) is provided on the oil drain pipe (41).

7. A diesel generator with a noise reduction device according to claim 1, characterized in that: The soundproof enclosure assembly (2) includes a fixed cover (21) and a movable cover (22), which are locked together by a locking structure (23).

8. A diesel generator with a noise reduction device according to claim 7, characterized in that: The fixed cover (21) is provided with an installation port (213) corresponding to the movable cover (22). The installation port (213) is provided with a sealing ring (214). The side projection of the sealing ring (214) is L-shaped. When the movable cover (22) is locked and installed on the installation port (213) of the fixed cover (21), the movable cover (22) is sealed and fitted with the fixed cover (21) through the sealing ring (214).

9. A diesel generator with a noise reduction device according to claim 1, characterized in that: The soundproof cover assembly (2) is provided with a silencer box (215) connected to the air outlet (212) at the air outlet end. The silencer box (215) is filled with sound-absorbing cotton and has an exhaust hole (2151) connected to the air outlet (212).

10. A diesel generator with a noise reduction device according to claim 1, characterized in that: The exhaust gas discharge pipe (12) is equipped with a primary composite filter device (121).

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