Large-scale biogas tank heavy block air bag coordination stirring system

Abstract

The present application relates to biogas production equipment technical field, specifically relates to a large-scale biogas tank heavy block air bag collaborative stirring system, it includes: pool body, pulley hanger, pulley assembly, gas float assembly and pipeline assembly.Pool body top is equipped with biogas collection port, and inside is assembled pulley assembly through pulley hanger, and gas float assembly is composed of traction rope, heavy block and air bag, and air bag is connected with air pump through pipeline assembly with gas control module.Working, air pump cooperates with gas control module, makes two sides air bag alternate inflation and deflation, drives heavy block and air bag reciprocating lifting, completes the stirring of material in pool;Simultaneously, traction rope drives pulley assembly to run, drives generator to generate electricity.The system structure is simple, stable operation, and stirring effect is good, and still can recover kinetic energy to generate electricity, and energy consumption is low, and it is suitable for large-scale biogas tank fermentation operation.

Description

Technical Field

[0001] This invention relates to the field of biogas production equipment technology, and more specifically, to a large-scale biogas digester heavy block airbag co-mixing system. Background Technology

[0002] Currently, large-scale biogas digesters are the core facilities for biomass biogas fermentation. Thorough mixing of fermentation materials is crucial for ensuring microbial activity and improving biogas production efficiency. Existing large-scale biogas digesters mostly employ paddle mechanical agitation or blower agitation. Traditional paddle agitation relies on external power, which easily leads to component wear and leakage in the digester seal over long-term operation, resulting in high equipment failure rates and significant maintenance costs. Conventional blower agitation has limited force, making it difficult to agitate materials at the bottom and edges, leading to uneven mixing and incomplete fermentation. Furthermore, existing agitation devices are functionally limited, only performing the mixing operation; the kinetic energy generated during mixing cannot be recovered, resulting in low energy utilization and high overall energy consumption, making it difficult to meet the long-term, stable operation requirements of large-scale biogas digesters. Summary of the Invention

[0003] In view of this, the present invention addresses the shortcomings of the prior art by proposing a large-scale biogas digester heavy block airbag co-mixing system, which aims to solve at least one of the problems mentioned in the background art.

[0004] This invention provides a large biogas digester heavy block airbag co-stirring system, comprising: a digester body, the top of which is provided with a biogas collection port, and the top wall inside the digester body is provided with a pulley hanger; A pulley assembly is disposed inside the pool body, and the mounting end of the pulley assembly is fixedly connected to the pulley hanger, and the rotating end of the pulley assembly is fixedly connected to the input end of the generator; An air flotation component is mounted on top of the pulley assembly. The air flotation component is connected to an air pump through a pipe assembly, and a gas control module is installed on the pipe assembly.

[0005] In some embodiments, the pulley assembly includes: Two rotating shafts are provided, and the mounting ends of the two rotating shaft sidewalls are respectively fixedly connected to the two ends of the bottom of the pulley hanger. One end of the rotating shaft is fixedly connected to the input end of the generator. There are two air tube winding rollers, each corresponding to one of the two rotating shafts. The air tube winding rollers are sleeved on the outer wall of the rotating shafts and are fixedly connected to the rotating shafts.

[0006] In some embodiments, the air flotation assembly includes: A traction rope is straddling the top of the two air tubes winding rollers; There are two weights, and the two weights are respectively disposed at both ends of the traction rope, with the top of the weights fixedly connected to the bottom of the traction rope.

[0007] In some embodiments, the air flotation assembly further includes two air bladders, each of which is disposed on top of one of the two weights. The bottom of each air bladder is fixedly connected to the top of the weight, and the two air bladders are connected to the air pump via a pipe assembly.

[0008] In some embodiments, the pipe assembly includes: A first conduit, one end of which is connected to one of the airbags, and the other end of which is connected to the gas control module; The second pipe has one end connected to another of the airbags, and the other end connected to the gas control module.

[0009] In some embodiments, the pipe assembly further includes: An air intake pipe, one end of which is connected to the gas control module, and the other end of which is connected to the air pump; An air outlet pipe, one end of which is connected to the gas control module, and the other end of which is connected to the air pump.

[0010] In some embodiments, a limit plate is provided on the inner wall of the pool.

[0011] In some embodiments, the airbag has a ring-shaped cross-section.

[0012] In some embodiments, the air inlet pipe and the air outlet pipe penetrate the pool body, and the sidewalls of the air inlet pipe and the air outlet pipe are fixedly and sealed to the pool body.

[0013] In some embodiments, the axial cross-section of the pulley hanger is a U-shaped structure.

[0014] Compared with existing technologies, the advantages of this invention are as follows: This application adopts a structure of airbags and weights working together for reciprocating stirring, abandoning the traditional paddle structure. The overall mechanical structure is simple, with less wear on moving parts, effectively reducing sealing failures and significantly lowering equipment inspection and maintenance costs. The alternating inflation and deflation of the airbags on both sides drives the components to move up and down reciprocally, covering most of the area within the digester. This fully agitates the fermentation material, ensuring sufficient contact between the material and the microorganisms, effectively improving fermentation efficiency and biogas production. During operation, the traction rope drives the pulley assembly to rotate and power the generator, converting the mechanical energy generated by stirring into electrical energy, achieving energy recovery and utilization, and significantly improving the overall energy utilization rate. Combined with limiting plates and other structures, stable operation is ensured. The entire system has low energy consumption, high practicality, and is suitable for large biogas digesters, offering excellent overall benefits.

[0015] The above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0016] Other features and aspects of this disclosure will become clearer from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a front structural cross-sectional view of the large biogas digester heavy block airbag co-mixing system provided in an embodiment of the present invention; Figure 2 This is a front view of the large biogas digester heavy block airbag co-mixing system provided in an embodiment of the present invention.

[0019] The components include: 1. Pool body; 2. Biogas collection port; 3. Pulley hanger; 4. Generator; 5. Rotating shaft; 6. Gas pipe winding roller; 7. Traction rope; 8. Weight; 9. Airbag; 10. First pipe; 11. Second pipe; 12. Inlet pipe; 13. Outlet pipe; 14. Limiting plate; 15. Gas control module. Detailed Implementation

[0020] 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 of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] See Figure 1-2 As shown, a large biogas digester heavy block airbag co-mixing system according to an embodiment of this application includes: The pool body 1 has a biogas collection port 2 at its top, and a pulley hanger 3 is installed on the top wall inside the pool body 1. A pulley assembly is disposed inside the pool body 1, and the mounting end of the pulley assembly is fixedly connected to the pulley hanger 3, and the rotating end of the pulley assembly is fixedly connected to the input end of the generator 4; An air flotation component is mounted on top of the pulley assembly. The air flotation component is connected to an air pump through a pipe assembly, and a gas control module 15 is installed on the pipe assembly.

[0025] In some specific embodiments, the pulley assembly includes: There are two rotating shafts 5, and the mounting ends of the side walls of the two rotating shafts 5 are respectively fixedly connected to the two ends of the bottom of the pulley hanger 3. One end of the rotating shaft 5 is fixedly connected to the input end of the generator 4. There are two air tube winding rollers 6, which are respectively arranged corresponding to the two rotating shafts 5. The air tube winding rollers 6 are sleeved on the outer wall of the rotating shaft 5, and the air tube winding rollers 6 are fixedly connected to the rotating shaft 5.

[0026] In some specific embodiments, the air flotation assembly includes: The traction rope 7 is straddling the top of the two air tube winding rollers 6; There are two weights 8, and the two weights 8 are respectively disposed at both ends of the traction rope 7, with the top of the weight 8 fixedly connected to the bottom of the traction rope 7.

[0027] It should be understood that the coordinated design of two rotating shafts 5, two air-tube rollers 6, traction ropes 7, and double counterweights 8 greatly improves the transmission stability, motion uniformity, and adaptability to working conditions of the equipment. The arrangement of the two rotating shafts 5, fixedly installed at both ends of the bottom of the pulley hanger 3, evenly distributes the overall transmission load across the entire structure of the pulley hanger 3, avoiding problems such as stress concentration, installation misalignment, and structural deformation that are prone to occur with single-shaft transmission. This significantly improves the overall installation firmness and structural stability of the pulley assembly. Simultaneously, the ends of the rotating shafts 5 are directly fixedly connected to the input end of the generator 4, enabling direct transmission of mechanical power, reducing power loss in intermediate transmission structures, ensuring stable and efficient input of rotational torque to the generator 4, and guaranteeing the continuity and stability of kinetic energy recovery and power generation. Two air pipe rollers 6 are fitted and fixed to the outer walls of two rotating shafts 5 in a one-to-one correspondence, so that the air pipe rollers 6 and the rotating shafts 5 form a rigid integrated transmission structure. There is no relative slippage or transmission jamming during operation, which completely eliminates the defects of traditional roller transmission such as slippage, low transmission accuracy and power loss. It ensures that the rotation angle and speed of the air pipe rollers 6 are matched with the lifting displacement of the traction ropes 7 at both ends, so as to achieve precise synchronous linkage between stirring motion and power generation motion.

[0028] A traction rope 7 straddling the tops of the two air tube rollers 6 forms a bridging closed-loop traction structure. Combined with symmetrically fixed weights 8 at both ends, this constitutes a balanced gravity traction mechanism. The two sets of weights 8 provide a stable gravity reference for the reciprocating motion of the air flotation component. When one side of the air bladder 9 deflates and loses buoyancy, the weights 8 can rely on their own weight to provide sufficient and uniform downward driving force, ensuring rapid and stable settling. Simultaneously, the symmetrical counterweight structure effectively balances the forces on both ends of the traction rope 7, preventing problems such as deviation, offset, or loosening of the traction rope 7, ensuring that the traction rope 7 always runs in contact with the surface of the air tube rollers 6. The overall structure eliminates complex transmission components, relying on a purely mechanical symmetrical linkage structure to achieve reciprocating mixing and power output. The structure is simple, durable, and has a low failure rate. Under long-term reciprocating operation, wear is minimal. It not only effectively ensures the uniformity and continuity of material mixing in the biogas digester but also provides a continuous and stable power supply to the generator 4, balancing mixing performance and energy recovery efficiency, significantly reducing equipment maintenance difficulty and operating costs.

[0029] In some specific embodiments, the air flotation assembly further includes two airbags 9, with each airbag 9 being disposed on top of one of the two weights 8. The bottom of each airbag 9 is fixedly connected to the top of the weight 8, and the two airbags 9 are connected to the air pump through a pipe assembly.

[0030] In some specific embodiments, the piping assembly includes: The first pipe 10 has one end connected to one of the airbags 9 and the other end connected to the gas control module 15. The second pipe 11 has one end connected to another airbag 9 and the other end connected to the gas control module 15.

[0031] In some specific embodiments, the piping assembly further includes: The air intake pipe 12 has one end connected to the gas control module 15 and the other end connected to the air pump. The gas outlet pipe 13 has one end connected to the gas control module 15 and the other end connected to the air pump.

[0032] In some specific embodiments, a limit plate 14 is provided on the inner wall of the pool body 1.

[0033] In some specific embodiments, the transverse cross-section of the airbag 9 is an annular structure.

[0034] In some specific embodiments, the air inlet pipe 12 and the air outlet pipe 13 penetrate the pool body 1, and the sidewalls of the air inlet pipe 12 and the air outlet pipe 13 are fixedly and sealed to the pool body 1.

[0035] An airbag 9 is installed on the top of the weight 8, and the bottom of the airbag 9 is fixedly connected to the top of the weight 8, so that the airbag 9 and the weight 8 form an integrated motion component. This structure can achieve precise matching and linkage of buoyancy and gravity. Through the combination structure of the two sets of symmetrical airbags 9 and weight 8, two independent lifting drive units can be formed inside the pool 1, providing a stable power foundation for alternating lifting and stirring operations. Compared with a single drive structure, it effectively improves the stirring reciprocating frequency and stirring coverage.

[0036] Meanwhile, this device is equipped with independent first pipe 10 and second pipe 11, which are connected one-to-one between the two airbags 9 and the gas control module 15, respectively, so as to realize independent control of the air path of the two airbags 9. The gas control module 15 can independently control the inflation and deflation of either side of the airbag 9, completely avoiding mutual interference between the two air paths, ensuring that the buoyancy of the airbag 9 on one side is accurate and the response is rapid, so that the timing of the lifting and lowering actions at both ends is accurate and the operation is synchronous and orderly, ensuring that the stirring action is continuous, stable and without jamming.

[0037] The air inlet pipe 12 and air outlet pipe 13 are respectively connected to the gas control module 15 and the air pump to form a complete closed-loop gas circulation circuit. The air inlet pipe 12 can stably deliver high-pressure gas to complete the inflation and lifting operation of the airbag 9, and the air outlet pipe 13 can quickly extract the gas inside the airbag 9 to achieve depressurization and sedimentation, realize gas recycling, effectively reduce the energy consumption of the air pump during continuous operation, and improve the energy-saving performance of the equipment.

[0038] The air inlet pipe 12 and the air outlet pipe 13 penetrate the tank body 1 and are fixedly and sealed to the side wall of the tank body 1. This completely seals the gaps at the pipe penetration points, ensuring a strictly anaerobic sealed environment inside the tank body 1. This effectively prevents external air and bacteria from entering the tank body 1 and interfering with the activity of the anaerobic fermentation bacteria, avoiding fermentation failure and reduced gas production. It also prevents biogas leakage from the tank, improving equipment operation safety and biogas collection and utilization rate. The air bladder 9 adopts a transverse annular structure design. Compared with conventional circular or square air bladder structures, the annular air bladder 9 has a larger contact area with the fermentation liquid, resulting in more uniform and stable buoyancy output. The force is balanced during the lifting and lowering process, preventing unilateral tilting, deviation, or overturning. At the same time, the annular structure adapts to the internal space shape of the tank body 1, resulting in less fluid resistance during movement, reducing the operating load of the equipment, and effectively extending the service life of the air bladder 9.

[0039] In addition, the limiting plate 14 added to the inner wall of the pool body 1 can accurately limit and guide the airbag 9 and the weight 8 that move up and down. It can effectively suppress the horizontal swaying, deviation and torsion of the airbag 9 and the weight 8 during high-speed lifting and lowering, avoid the problem of the traction rope 7 deviating and the parts colliding and getting tangled, eliminate the faults of equipment jamming and parts wear and damage, greatly improve the stability and reliability of the entire mixing system in long-term reciprocating operation, and reduce the equipment failure rate and operation and maintenance costs.

[0040] In some specific embodiments, the axial cross-section of the pulley hanger 3 is a U-shaped structure.

[0041] It should be understood that the overall structure is integrated inside the tank body 1, relying on air pressure regulation and the alternating action of buoyancy and gravity to achieve automated stirring operations, while simultaneously completing kinetic energy recovery and power generation. The entire set of equipment relies on the coordinated cooperation of its various components to achieve continuous and stable operation. Among them, the tank body 1 serves as the main body for fermentation and equipment installation. The biogas collection port 2 at the top can balance the air pressure inside the tank in real time and discharge excess gas produced during fermentation, providing a stable environment for anaerobic fermentation. The pulley hanger 3 with an axial cross section of U-shaped structure is fixedly installed on the top wall inside the tank body 1, which can provide stable installation support for the pulley assembly below and prevent operational deviation. The two rotating shafts 5 of the pulley assembly are respectively fixed at both ends of the bottom of the pulley hanger 3. Each rotating shaft 5 is fixedly fitted with a gas pipe roller 6 on its outer side, and the outer end of the rotating shaft 5 is fixedly connected to the input end of the generator 4, forming a power transmission and power generation structure. The traction rope 7 straddling the top of the two air pipe rollers 6 is a closed-loop transmission traction structure. The two ends of the rope are fixed with weights 8 respectively. Each weight 8 has an airbag 9 with an annular cross section fixedly installed on its top. The two sets of airbags 9 are connected to the gas control module 15 through the first pipe 10 and the second pipe 11 respectively. The gas control module 15 is connected to the external air pump through the air inlet pipe 12 and the air outlet pipe 13 that pass through the pool body 1 and are sealed and fixed, forming a complete controllable air circuit system. The limiting plate 14 on the inner wall of the pool body 1 can limit and guide the rising and falling airbags 9 and weights 8.

[0042] When the equipment is running normally, the air pump continuously provides air power. The gas control module 15 precisely switches the air path status. First, gas is introduced through the air inlet pipe 12. After being distributed by the gas control module 15, it is inflated into one side of the airbag 9 through the first pipe 10. The volume of the airbag 9 on this side expands rapidly, generating upward buoyancy. The buoyancy overcomes the weight of the weight 8 itself, causing the weight 8 and the airbag 9 on this side to rise uniformly upward. At the same time, the gas control module 15 simultaneously opens the air path on the other side, extracting the gas from the airbag 9 on the other side through the second pipe 11. The gas flows back to the air pump through the air outlet pipe 13. The buoyancy of the airbag 9 on this side quickly dissipates, and it sinks vertically downward under the action of the weight 8 itself.

[0043] The traction rope 7 moves up and down with the components at both ends, driving the two gas pipe rollers 6 at the top to rotate synchronously in opposite directions. The gas pipe rollers 6 drive the fixedly connected rotating shaft 5 to rotate synchronously, and the rotating shaft 5 drives the connected generator 4 to operate, converting mechanical kinetic energy into electrical energy, thus realizing energy recovery. The gas control module 15 periodically switches the inflation and deflation states of the left and right airbags 9, causing the airbags 9 and the weight 8 on both sides to move up and down alternately. During the longitudinal displacement, the sedimented and stratified fermentation material inside the tank 1 is continuously disturbed and turned, eliminating dead zones in the stirring and achieving all-round and uniform stirring of the material inside the tank 1. At the same time, the limiting plate 14 can effectively limit the horizontal swaying, offset and entanglement of the components. The sealed pipe structure of the tank 1 and the top biogas collection port 2 can ensure the closed anaerobic environment and stable gas pressure inside the tank, ensuring that stirring, fermentation and power generation operations are carried out synchronously, continuously and stably.

[0044] By employing a synergistic stirring structure of weight 8 and airbag 9, combined with a pulley power generation structure, the overall performance of stirring operations in large biogas digesters is significantly optimized, offering multiple practical advantages. Firstly, this device abandons the complex transmission structure of traditional paddle-type stirring in biogas digesters. It relies on the inflation and deflation of airbag 9, the gravity of weight 8 working in conjunction with the traction rope 7, and the air pipe winding around roller 6 to complete the stirring operation. The overall moving parts have a simple structure and low wear. Simultaneously, the air inlet pipe 12 and air outlet pipe 13 are sealed and fixedly connected to the digester body 1, effectively preventing leakage and greatly reducing equipment failure rates and subsequent maintenance costs, making it suitable for long-term continuous operation of large biogas digesters. Secondly, the two sets of airbags 9 and weight 8 have a large longitudinal reciprocating lifting stroke, covering most of the internal area of ​​the digester body 1 with a stirring range. This eliminates the dead zones inherent in traditional stirring, fully agitating and mixing the fermentation materials within the tank, allowing the biomass raw materials and fermentation bacteria to fully contact, effectively improving fermentation uniformity and increasing biogas fermentation efficiency and gas production. Furthermore, while completing the mixing operation, the device can drive the air pipe to rotate around the roller 6 and the rotating shaft 5 via the traction rope 7, thereby driving the generator 4 to work. This recovers the excess mechanical energy generated during the mixing process and converts it into electrical energy, realizing the secondary utilization of waste kinetic energy, effectively reducing the overall energy consumption of the equipment, and improving the comprehensive energy utilization rate. Finally, the U-shaped pulley hanger 3 ensures the stability of the pulley assembly installation, the annular cross-section airbag 9 provides uniform and stable buoyancy, and the gas control module 15 precisely regulates the inflation and deflation rhythm. Combined with the limiting plate 14's limiting and protective function, the entire mixing system operates smoothly and regularly, avoiding component displacement and collision, and significantly improving the safety and stability of the equipment operation.

[0045] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A large-scale biogas digester heavy block airbag co-mixing system, characterized in that, include: The pool body has a biogas collection port at its top, and a pulley hanger is installed on the top wall inside the pool body. A pulley assembly is disposed inside the pool body, and the mounting end of the pulley assembly is fixedly connected to the pulley hanger, and the rotating end of the pulley assembly is fixedly connected to the input end of the generator; An air flotation component is mounted on top of the pulley assembly. The air flotation component is connected to an air pump through a pipe assembly, and a gas control module is installed on the pipe assembly.

2. The large-scale biogas digester heavy block airbag co-mixing system according to claim 1, characterized in that, The pulley assembly includes: Two rotating shafts are provided, and the mounting ends of the two rotating shaft sidewalls are respectively fixedly connected to the two ends of the bottom of the pulley hanger. One end of the rotating shaft is fixedly connected to the input end of the generator. There are two air tube winding rollers, each corresponding to one of the two rotating shafts. The air tube winding rollers are sleeved on the outer wall of the rotating shafts and are fixedly connected to the rotating shafts.

3. The large-scale biogas digester heavy block airbag co-mixing system according to claim 2, characterized in that, The air flotation component includes: A traction rope is straddling the top of the two air tubes winding rollers; There are two weights, and the two weights are respectively disposed at both ends of the traction rope, with the top of the weights fixedly connected to the bottom of the traction rope.

4. The large-scale biogas digester heavy block airbag co-mixing system according to claim 3, characterized in that, The air flotation assembly also includes two air bladders, each positioned on top of one of the two weights. The bottom of each air bladder is fixedly connected to the top of the weight, and the two air bladders are connected to the air pump via a pipe assembly.

5. A large-scale biogas digester heavy block airbag co-mixing system according to claim 4, characterized in that, The piping assembly includes: A first conduit, one end of which is connected to one of the airbags, and the other end of which is connected to the gas control module; The second pipe has one end connected to another of the airbags, and the other end connected to the gas control module.

6. A large-scale biogas digester heavy block airbag co-mixing system according to claim 5, characterized in that, The piping assembly also includes: An air intake pipe, one end of which is connected to the gas control module, and the other end of which is connected to the air pump; An air outlet pipe, one end of which is connected to the gas control module, and the other end of which is connected to the air pump.

7. A large-scale biogas digester heavy block airbag co-mixing system according to claim 6, characterized in that, The inner wall of the pool is provided with a limit plate.

8. A large-scale biogas digester heavy block airbag co-mixing system according to claim 7, characterized in that, The airbag has a ring-shaped cross-section.

9. A large-scale biogas digester heavy block airbag co-mixing system according to claim 8, characterized in that, The air inlet pipe and the air outlet pipe pass through the pool body, and the sidewalls of the air inlet pipe and the air outlet pipe are fixedly and sealed to the pool body.

10. A large-scale biogas digester heavy block airbag co-mixing system according to claim 9, characterized in that, The axial cross-section of the pulley hanger is a U-shaped structure.

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