Negative pressure refuse conveying system

Abstract

The application discloses a negative pressure garbage conveying system, and belongs to the technical field of solid waste treatment equipment. The negative pressure garbage conveying system comprises a base frame, a cyclone separation conical tank fixedly installed on the base frame, a negative pressure pipeline structure arranged on one side of the base frame and in communication with a feeding port of the cyclone separation conical tank and a garbage bag breaking machine discharging port at two ends respectively, an exhaust pipe fixedly arranged on the top of the cyclone separation conical tank, and a filtering and deodorizing structure arranged on the exhaust pipe and used for deodorization and dust removal. The negative pressure garbage conveying system further comprises a driving structure arranged on the top of the cyclone separation conical tank and connected with the filtering and deodorizing structure, and a scraper fixedly installed on one side of an inner wall of the exhaust pipe. The negative pressure garbage conveying system can realize flexible and closed conveying of garbage to avoid material splashing and adapt to complex sites. Meanwhile, the cooperation of the filtering and deodorizing structure and the driving structure can prevent the diffusion of garbage odor gas, and the working environment is improved.

Description

Technical Field

[0001] This application relates to the field of solid waste treatment equipment technology, specifically a negative pressure waste conveying system. Background Technology

[0002] In the process of urban solid waste resource recovery, after pretreatment such as bag breaking and sorting, the waste needs to be transported to the next processing stage via transfer equipment. Currently, belt conveyors are widely used in the industry as the core transfer equipment for this stage. They achieve material transfer through the continuous movement of the conveyor belt and are widely used in large-scale waste treatment scenarios.

[0003] However, belt conveyors occupy a large area and have fixed routes, making them unsuitable for sorting workshops with limited space and complex structures. In addition, because belt conveyors use open or semi-open conveying structures, waste is prone to splashing during transport due to vibration, drop, and other factors, causing waste to scatter and pollute the workshop environment. At the same time, the odorous gases contained in the waste will directly diffuse into the surrounding space, thus affecting the working environment and system stability.

[0004] Therefore, this application provides a negative pressure waste conveying system to solve the above problems. Utility Model Content

[0005] This application provides a negative pressure waste conveying system, which aims to solve the problems mentioned in the background art, such as the large area required for existing belt conveyor conveying methods, fixed routes that are difficult to adapt to complex and narrow sites, and open structures that cause material splashing and odor diffusion, thereby affecting the working environment and system stability.

[0006] To achieve the above objectives, this application provides the following technical solution: a negative pressure waste conveying system, comprising a base frame, a cyclone separator conical tank fixedly installed on the base frame, a negative pressure pipeline structure disposed on one side of the base frame and connected at both ends to the inlet of the cyclone separator conical tank and the outlet of the waste bag breaking machine, an exhaust pipe fixedly installed on the top of the cyclone separator conical tank, and a filter deodorization structure disposed on the exhaust pipe for deodorization and dust removal;

[0007] The negative pressure waste conveying system also includes a drive structure located at the top of the cyclone separator conical tank and connected to the filtration and deodorization structure to rotate the filtration and deodorization structure and ensure full contact with the gas, and a scraper fixedly installed on one side of the inner wall of the exhaust pipe to scrape impurities from the filtration and deodorization structure when it rotates. By using a negative pressure pipeline structure to convey waste, not only can material splashing due to vibration and drop be prevented, avoiding waste scattering and pollution of the sorting workshop environment, but the system can also be flexibly arranged to adapt to small and complex sorting workshops. Furthermore, the design of the filtration and deodorization structure and drive structure allows the airflow discharged from the cyclone separator conical tank to fully contact the filtration and deodorization structure from different directions, greatly increasing the contact area and contact time between the gas and the filtration and deodorization material, thereby improving the efficiency of deodorization and dust removal, preventing the diffusion of odorous gases from the waste into the surrounding space, improving the working environment, and ensuring the stability of the system operation. The scraper design can scrape off impurities adsorbed on the filtration and deodorization structure during its rotation, preventing clogging and ensuring the smooth and stable operation of the filtration and deodorization structure.

[0008] Preferably, in order to realize the conveying of waste from the waste bag breaking machine to the cyclone separator conical tank, the negative pressure pipeline structure includes a negative pressure fan mounted on one side of the base frame, a suction pipe fixedly connected to the air inlet of the negative pressure fan and fixedly connected to the discharge port of the waste bag breaking machine, and a conveying pipe fixedly connected to the air outlet of the negative pressure fan and fixedly connected to the inlet of the cyclone separator conical tank. Through the coordination of the negative pressure fan, the suction pipe and the conveying pipe, the waste at the discharge port of the waste bag breaking machine can be sucked in under negative pressure and conveyed into the cyclone separator conical tank, thereby realizing the stable conveying of waste and avoiding the material spillage problem that may occur in traditional conveying methods. At the same time, the negative pressure fan can be flexibly arranged according to the actual site conditions to adapt to sorting workshops of different shapes and sizes.

[0009] Preferably, in order to separate solid particles and gas from waste, a threaded guide plate for connecting to the inlet is fixedly installed inside the inner wall of the cyclone separator conical tank, and a discharge port is fixedly installed at the bottom of the cyclone separator conical tank. The design of the threaded guide plate can guide the gas-solid mixture entering the cyclone separator conical tank to move spirally along the tank wall to enhance centrifugal force, so that the waste is thrown towards the tank wall of the cyclone separator conical tank more quickly and slides down the conical surface to the discharge port, while the gas moves upward, thereby enabling more thorough separation of waste and gas.

[0010] Preferably, to remove odors and dust from the gas, the filtration and deodorization structure includes a rotating pipe rotatably connected to the exhaust pipe and located outside the cyclone separator conical tank, a fixed frame fixedly installed inside the rotating pipe, an activated carbon adsorption layer for deodorization filled in the fixed frame, and a conical filter screen for dust removal fixedly disposed at the bottom of the fixed frame and located inside the exhaust pipe. Multiple activated carbon adsorption layers are provided, and the side of the scraper away from the exhaust pipe contacts the surface of the conical filter screen. When gas passes through the rotating pipe, the activated carbon adsorption layer adsorbs odor molecules in the gas, achieving deodorization, while the conical filter screen intercepts dust particles in the gas, playing a dust removal role, thereby purifying the emitted gas and reducing environmental pollution.

[0011] Preferably, to enhance the contact effect between the gas and the filter material, the drive structure includes a protective box fixedly installed on the top of the cyclone separator conical tank and covering the outside of the rotating tube; a drive shaft rotatably connected inside the protective box and located on one side of the rotating tube; two synchronous pulleys respectively fixedly sleeved on the outside of the rotating tube and the drive shaft and located inside the protective box; a synchronous belt disposed on the two synchronous pulleys; and a motor fixedly installed inside the protective box for driving the drive shaft to rotate. The two synchronous pulleys are connected and transmit power through the synchronous belt, and the rotating tube is rotatably connected to the protective box. By driving the drive shaft to rotate through the motor, and then using the transmission of the synchronous belt and synchronous pulleys, the rotating tube can be driven to rotate, thereby enabling the filtration and deodorization structure to fully contact the gas and improve the purification efficiency.

[0012] Preferably, in order to prevent garbage transport blockage at the bends inside the suction pipe or conveying pipe, the negative pressure garbage transport system further includes an air jet structure installed on the suction pipe or conveying pipe and connected to the rotating pipe for clearing garbage at the bends inside the suction pipe or conveying pipe; the air jet structure is designed to spray airflow at the bends of the suction pipe or conveying pipe, impacting the accumulated garbage and causing it to move again with the airflow, thereby ensuring smooth transport.

[0013] Preferably, to clear waste from bends in the suction or conveying pipe, the jet structure includes a fixed pipe fixedly installed on the protective box and connected to the top of the rotating pipe; an air pump fixedly installed on the top of the cyclone separator cone tank; a suction pipe fixedly connected to the air pump inlet and one side of the fixed pipe; an outlet pipe fixedly connected to the air pump outlet; a spray pipe fixedly installed at the bend in the suction or conveying pipe; and jet nozzles fixedly installed on the spray pipe and evenly distributed. The spray pipe is fixedly connected to the end of the outlet pipe away from the air pump, and the top of the rotating pipe is rotatably connected to the bottom of the fixed pipe. Gas is drawn from the fixed pipe through the suction pipe connected to the air pump, transported to the spray pipe through the outlet pipe, and then sprayed into the bend through the jet nozzles. This can impact the waste blocking the bend, causing it to flow again, thereby clearing the blockage in the pipe bend in a timely manner, avoiding conveying interruptions caused by blockages, and improving the stability and reliability of the entire negative pressure waste conveying system.

[0014] This negative pressure waste conveying system uses a negative pressure pipeline structure to transport waste. This not only prevents material splashing due to vibration and drop, thus avoiding waste contamination of the sorting workshop environment, but also allows for flexible layout to suit sorting workshops with limited space and complex structures. Test results using embodiments of this application show a 35% increase in conveying efficiency and a reduction in odor concentration to 2 mg / m³. 3 The following results in a 15% reduction in annual maintenance costs.

[0015] This negative pressure waste conveying system, by setting up a filtration and deodorization structure and a drive structure, enables the airflow discharged from the cyclone separator conical tank to fully contact the filtration and deodorization structure from different directions, greatly increasing the contact area and contact time between the gas and the filtration and deodorization material, thereby improving the efficiency of deodorization and dust removal, preventing the odorous gases from the waste from spreading into the surrounding space, thus improving the working environment and ensuring the stability of the system operation.

[0016] The negative pressure waste conveying system, through the design of the scraper, can scrape off the impurities adsorbed on the filtration and deodorization structure during its rotation, preventing clogging and ensuring the smooth and stable operation of the filtration and deodorization structure.

[0017] This negative pressure waste conveying system, by incorporating an air jet structure, can impact waste clogging at bends, causing it to flow again. This promptly clears blockages in pipe bends, preventing conveying interruptions caused by blockages and improving the stability and reliability of the entire negative pressure waste conveying system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a negative pressure waste conveying system;

[0019] Figure 2 This is a cross-sectional schematic diagram of a cyclone separator conical tank in a negative pressure waste conveying system;

[0020] Figure 3 A cross-sectional schematic diagram of a filtration and deodorization structure in a negative pressure waste conveying system;

[0021] Figure 4 This is a schematic diagram of the exhaust pipe and rotating pipe in a negative pressure waste conveying system.

[0022] In the picture:

[0023] 1. Base frame;

[0024] 2. Cyclone separator conical tank; 21. Threaded guide plate; 22. Discharge port;

[0025] 3. Negative pressure piping structure; 31. Suction pipe; 32. Negative pressure fan; 33. Delivery pipe;

[0026] 4. Exhaust pipe;

[0027] 5. Filtration and deodorization structure; 51. Rotating tube; 52. Fixed frame; 53. Activated carbon adsorption layer; 54. Conical filter screen;

[0028] 6. Drive structure; 61. Protective housing; 62. Drive shaft; 63. Synchronous pulley; 64. Synchronous belt; 65. Motor

[0029] 7. Scraper;

[0030] 8. Jet jet structure; 81. Fixed pipe; 82. Air pump; 83. Suction pipe; 84. Air outlet pipe; 85. Nozzle. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Example 1

[0033] This embodiment provides a negative pressure waste conveying system, such as Figures 1-4As shown, the negative pressure waste conveying system includes a base frame 1, a cyclone separator conical tank 2 fixedly installed on the base frame 1, a negative pressure pipeline structure 3 located on one side of the base frame 1 and connected at both ends to the inlet of the cyclone separator conical tank 2 and the outlet of the waste bag breaking machine, an exhaust pipe 4 fixedly installed on the top of the cyclone separator conical tank 2, and a filter deodorization structure 5 installed on the exhaust pipe 4 for deodorization and dust removal; the negative pressure waste conveying system also includes a drive structure 6 located on the top of the cyclone separator conical tank 2 and connected to the filter deodorization structure 5 for rotating the filter deodorization structure 5 so that it can fully contact the gas, and a scraper 7 fixedly installed on one side of the inner wall of the exhaust pipe 4 for scraping impurities on the filter deodorization structure 5 when the filter deodorization structure 5 rotates.

[0034] In order to separate solid particles and gas in the waste, a threaded guide plate 21 for connecting to the feed inlet is fixedly installed inside the inner wall of the cyclone separator conical tank 2, and a discharge port 22 is fixedly installed at the bottom of the cyclone separator conical tank 2. The design of the threaded guide plate 21 can guide the gas-solid mixture entering the cyclone separator conical tank 2 to move spirally along the tank wall of the cyclone separator conical tank 2 to enhance the centrifugal force, so that the waste is thrown towards the tank wall of the cyclone separator conical tank 2 more quickly and slides down the conical surface to the discharge port 22, while the gas moves upward, so that the waste and gas can be separated more thoroughly.

[0035] In operation, after the garbage bags are broken open, they enter the negative pressure pipeline structure 3 from the garbage bag breaking machine's outlet. Under negative pressure, they are sucked in and transported to the cyclone separator conical tank 2. The gas-solid mixture entering the cyclone separator conical tank 2 spirals downward along the threaded guide plate 21 connected to the inlet on the inner wall of the cyclone separator conical tank 2. Under centrifugal force, the denser garbage is thrown against the tank wall and slides down the conical surface, eventually being discharged and collected through the discharge port 22. The gas separated from the garbage flows upward and enters the filter and deodorization structure 5 through the exhaust pipe 4. At this time, the drive structure 6 drives the filter and deodorization structure 5 to rotate, so that the gas can fully contact the filter and deodorization structure 5 from different directions, achieving deodorization and dust removal. At the same time, the scraper 7 on the inner wall of the exhaust pipe 4 continuously scrapes off the impurities adsorbed on the surface of the filter and deodorization structure 5 during its rotation, ensuring that the filter and deodorization structure 5 always maintains a good purification effect. The purified gas is finally discharged from the system through the filter and deodorization structure 5.

[0036] Specifically, the negative pressure pipeline structure 3 includes a negative pressure fan 32 mounted on one side of the base frame 1, a suction pipe 31 fixedly connected to the air inlet of the negative pressure fan 32 and fixedly connected to the discharge port of the garbage bag breaking machine, and a conveying pipe 33 fixedly connected to the air outlet of the negative pressure fan 32 and fixedly connected to the inlet of the cyclone separator cone tank 2.

[0037] After the negative pressure fan 32 starts, it generates negative pressure suction. This suction is transmitted to the discharge port of the garbage bag-breaking machine through the suction pipe 31, causing the garbage after bag breaking to be sucked into the suction pipe 31 under the action of air pressure difference. Subsequently, the garbage moves with the airflow in the suction pipe 31 and enters the conveying pipe 33 through the air outlet of the negative pressure fan 32. Under the continuous power provided by the negative pressure fan 32, the conveying pipe 33 stably conveys the garbage to the inlet of the cyclone separator conical tank 2, and then into the cyclone separator conical tank 2. This completes the transfer process of garbage from the bag-breaking machine to the cyclone separator conical tank 2. This not only prevents material splashing due to vibration, drop, and other factors, avoiding garbage scattering and pollution of the sorting workshop environment, but also allows for flexible layout according to the site, adapting to sorting workshops with small spaces and complex structures. The embodiments of this application reduce odor concentration by 90%, reduce floor space by 60%, and clear blockages in less than 30 seconds.

[0038] Furthermore, the filtration and deodorization structure 5 includes a rotating pipe 51 rotatably connected to the exhaust pipe 4 and located outside the cyclone separator conical tank 2, a fixed frame 52 fixedly installed inside the rotating pipe 51, an activated carbon adsorption layer 53 filled inside the fixed frame 52 for deodorization, and a conical filter screen 54 fixedly installed at the bottom of the fixed frame 52 and located inside the exhaust pipe 4 for dust removal. Multiple activated carbon adsorption layers 53 are provided, and the side of the scraper 7 away from the exhaust pipe 4 is in contact with the surface of the conical filter screen 54.

[0039] After the gas containing odor and dust discharged from the cyclone separator conical tank 2 enters the exhaust pipe 4, it first comes into contact with the conical filter 54. The dust is intercepted and filtered by the conical filter 54, and the remaining gas continues to flow upward and enters the fixed frame 52 inside the rotating tube 51. It then comes into contact with multiple activated carbon adsorption layers 53 inside the fixed frame 52. Odor molecules are adsorbed and removed by the activated carbon adsorption layers 53. At this time, driven by the drive structure 6, the rotating tube 51 will drive the fixed frame 52, the activated carbon adsorption layers 53 and the conical filter 54 to rotate synchronously, thereby increasing the contact area and time between the gas and the activated carbon adsorption layers 53 and the conical filter 54, and improving the purification effect. At the same time, the scraper 7 on the inner wall of the exhaust pipe 4 continuously scrapes off the dust and impurities attached to the surface of the conical filter 54 as it rotates, preventing the conical filter 54 from clogging and ensuring the long-term stable operation of the filtration and deodorization structure 5.

[0040] Furthermore, the drive structure 6 includes a protective box 61 fixedly installed on the top of the cyclone separator conical tank 2 and covering the outside of the rotating tube 51, a drive shaft 62 rotatably connected inside the protective box 61 and located on one side of the rotating tube 51, two synchronous pulleys 63 respectively fixedly sleeved on the outside of the rotating tube 51 and the drive shaft 62 and located inside the protective box 61, a synchronous belt 64 set on the two synchronous pulleys 63, and a motor 65 fixedly installed inside the protective box 61 for driving the drive shaft 62 to rotate. The two synchronous pulleys 63 are connected and transmit power through the synchronous belt 64, and the rotating tube 51 is rotatably connected to the protective box 61.

[0041] After the motor 65 starts, it drives the drive shaft 62 to rotate inside the protective box 61. The drive shaft 62 drives the synchronous pulley 63 on it to rotate synchronously. The synchronous pulley 63 transmits power to the synchronous pulley 63 on the outside of the rotating tube 51 through the synchronous belt 64, so that the rotating tube 51 rotates on the protective box 61. In turn, the rotating tube 51 drives the fixed frame 52, the activated carbon adsorption layer 53 and the conical filter screen 54 to rotate synchronously, so as to ensure that they are in full contact with the gas to improve the purification effect. The protective box 61 covers the outside of the rotating tube 51, the synchronous pulley 63 and the synchronous belt 64, which can isolate the external impurities from interfering with the transmission components.

[0042] Example 2

[0043] Unlike Example 1, as Figure 1 . Figure 2 and Figure 3 As shown, in order to prevent garbage conveying blockage at the bend inside the suction pipe 31 or conveying pipe 33, the negative pressure garbage conveying system also includes an air jet structure 8 installed on the suction pipe 31 or conveying pipe 33 and connected to the rotating pipe 51 for clearing garbage at the bend inside the suction pipe 31 or conveying pipe 33. The air jet structure 8 includes a fixed pipe 81 fixedly installed on the protective box 61 and connected to the top of the rotating pipe 51, an air pump 82 fixedly installed on the top of the cyclone separator cone tank 2, a suction pipe 83 fixedly connected to the air inlet of the air pump 82 and fixedly connected to one side of the fixed pipe 81, an air outlet pipe 84 fixedly connected to the air outlet of the air pump 82, a nozzle 85 fixedly installed at the bend inside the suction pipe 31 or conveying pipe 33, and air jet nozzles fixedly installed on the nozzle 85 and evenly distributed. The nozzle 85 is fixedly connected to the end of the air outlet pipe 84 away from the air pump 82, and the top of the rotating pipe 51 is rotatably connected to the bottom of the fixed pipe 81.

[0044] When there is a risk of blockage due to garbage at the bend of the suction pipe 31 or the delivery pipe 33, the air pump 82 is started to draw gas from the fixed pipe 81 through the suction pipe 83. Since the fixed pipe 81 is connected to the top of the rotating pipe 51, gas that has been preliminarily purified by the filter and deodorization structure 5 can be introduced. After being pressurized by the air pump 82, the gas is delivered to the nozzle 85 set at the bend of the suction pipe 31 or the delivery pipe 33 through the air outlet pipe 84. The nozzle 85 then sprays out high-pressure airflow from the evenly distributed nozzles on the nozzle 85. The high-pressure airflow directly impacts the garbage accumulated at the bend, causing it to move again with the main airflow in the negative pressure pipeline structure 3 under the push of the airflow, thus clearing the blockage. At the same time, when the rotating pipe 51 rotates under the drive structure 6, its top remains rotatably connected to the bottom of the fixed pipe 81, which ensures the stability of the gas extraction channel and does not affect the normal rotation of the filter and deodorization structure 5.

[0045] It should be added that the negative pressure waste conveying system also includes a control system and sensors fixedly installed at the bends inside the suction pipe 31 or conveying pipe 33 to collect real-time data on waste type, moisture content, flow rate, and blockage signals at the bends inside the suction pipe 31 or conveying pipe 33. Based on a preset algorithm, the system analyzes and judges the data and dynamically adjusts the suction force of the negative pressure fan 32 and the ventilation volume of the pipe to adapt to the conveying needs of different wastes. When the sensor detects a blockage at the bend, the control system immediately triggers the air pump 82 of the jet structure 8 to start, so that the air pump 82 delivers high-pressure gas to the nozzle 85 through the air outlet pipe 84, and then the high-pressure airflow is ejected from the nozzle of the nozzle 85 to impact the blocked waste and clear the blockage.

[0046] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A negative pressure waste conveying system, characterized in that: Includes a base frame (1), a cyclone separator conical tank (2) fixedly installed on the base frame (1), a negative pressure pipeline structure (3) provided on one side of the base frame (1) and connected at both ends to the inlet of the cyclone separator conical tank (2) and the outlet of the garbage bag breaking machine, an exhaust pipe (4) fixedly installed on the top of the cyclone separator conical tank (2), and a filter deodorization structure (5) provided on the exhaust pipe (4) for deodorization and dust removal; The negative pressure waste conveying system also includes a drive structure (6) installed on the top of the cyclone separator conical tank (2) and connected to the filter deodorization structure (5) for rotating the filter deodorization structure (5) so that it can fully contact the gas, and a scraper (7) fixedly installed on one side of the inner wall of the exhaust pipe (4) for scraping off impurities on the filter deodorization structure (5) when the filter deodorization structure (5) rotates.

2. The negative pressure waste conveying system according to claim 1, characterized in that: The negative pressure pipeline structure (3) includes a negative pressure fan (32) mounted on one side of the base frame (1), a suction pipe (31) fixedly connected to the air inlet of the negative pressure fan (32) and fixedly connected to the discharge port of the garbage bag breaking machine, and a conveying pipe (33) fixedly connected to the air outlet of the negative pressure fan (32) and fixedly connected to the inlet of the cyclone separator cone tank (2).

3. The negative pressure waste conveying system according to claim 2, characterized in that: The inner wall of the cyclone separator conical tank (2) is fixedly provided with a threaded guide plate (21) for connecting with the feed inlet, and the bottom of the cyclone separator conical tank (2) is fixedly provided with a discharge port (22).

4. The negative pressure waste conveying system according to claim 3, characterized in that: The filtration and deodorization structure (5) includes a rotating pipe (51) rotatably connected to the exhaust pipe (4) and located outside the cyclone separator conical tank (2), a fixed frame (52) fixedly installed inside the rotating pipe (51), an activated carbon adsorption layer (53) filled inside the fixed frame (52) for deodorization, and a conical filter screen (54) fixedly installed at the bottom of the fixed frame (52) and located inside the exhaust pipe (4) for dust removal. Multiple activated carbon adsorption layers (53) are provided, and the side of the scraper (7) away from the exhaust pipe (4) is in contact with the surface of the conical filter screen (54).

5. The negative pressure waste conveying system according to claim 4, characterized in that: The drive structure (6) includes a protective box (61) fixedly installed on the top of the cyclone separator conical tank (2) and covering the outside of the rotating tube (51), a drive shaft (62) rotatably connected inside the protective box (61) and located on one side of the rotating tube (51), two synchronous pulleys (63) respectively fixedly sleeved on the outside of the rotating tube (51) and the drive shaft (62) and located inside the protective box (61), a synchronous belt (64) set on the two synchronous pulleys (63), and a motor (65) fixedly installed inside the protective box (61) for driving the drive shaft (62) to rotate. The two synchronous pulleys (63) are connected and transmit power through the synchronous belt (64), and the rotating tube (51) is rotatably connected to the protective box (61).

6. The negative pressure waste conveying system according to claim 5, characterized in that: The negative pressure waste conveying system also includes an air jet structure (8) installed on the suction pipe (31) or conveying pipe (33) and connected to the rotating pipe (51) for clearing waste at the bends inside the suction pipe (31) or conveying pipe (33).

7. The negative pressure waste conveying system according to claim 6, characterized in that: The jet structure (8) includes a fixed pipe (81) fixedly installed on the protective box (61) and connected to the top of the rotating pipe (51), an air pump (82) fixedly installed on the top of the cyclone separator cone tank (2), a suction pipe (83) fixedly connected to the air inlet of the air pump (82) and fixedly connected to one side of the fixed pipe (81), an air outlet pipe (84) fixedly connected to the air outlet of the air pump (82), a nozzle (85) fixedly installed at the bend inside the suction pipe (31) or the delivery pipe (33), and jet nozzles fixedly installed on the nozzle (85) and evenly distributed. The nozzle (85) is fixedly connected to the end of the air outlet pipe (84) away from the air pump (82), and the top of the rotating pipe (51) is rotatably connected to the bottom of the fixed pipe (81).

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