Mining ventilation system capable of automatically adjusting blade angle

Abstract

The invention relates to the technical field of ventilation, in particular to a mining ventilation system capable of automatically adjusting blade angles, a fan is mounted in a two-way integrated ventilation pipeline, a control assembly is mounted between the walls of the two-way integrated ventilation pipeline, the fan is fixedly connected with a motor, and the motor is fixedly connected with the fan. Blades on the draught fan are driven by the control assembly to achieve automatic adjustment of blade angles, and the separation assembly is driven by the control assembly to achieve state switching. According to the invention, the problems of how to realize switching of different states of low-efficiency ventilation and high-efficiency ventilation by automatically adjusting fan blades in the operation of the ventilation system and how to realize separation of exhausted air and gas at an exhaust system end are solved.

Description

Technical Field

[0001] This invention relates to the field of ventilation technology, specifically to a mine ventilation system with automatic blade angle adjustment. Background Technology

[0002] Ventilation systems are crucial and indispensable in many fields. They improve air or gas quality by supplying, circulating, and collecting gases within the environment. The primary purpose of a ventilation system is to introduce fresh oxygen or air while simultaneously expelling harmful gases, moisture, odors, and other impurities. This is especially important in mines, where the environment is extremely harsh and lacks both air and oxygen. During mine operations, workers require a continuous supply of oxygen, while the operation generates large amounts of dust and harmful gases such as methane. In these conditions, the ventilation system is paramount; it doesn't just provide ventilation, as other processes cannot function without it.

[0003] There are many types of ventilation systems, which are generally divided into natural ventilation systems and forced ventilation systems. Natural ventilation usually uses natural airflow and temperature differences to make air flow. However, there is no air flow in mines, so mine ventilation systems often use forced ventilation, also known as mechanical ventilation systems. This is the most common ventilation technology. Mechanical ventilation systems use fans or blades to drive airflow, introducing fresh air into the mine and expelling harmful gases and impurities. This technology can improve air quality and increase human comfort.

[0004] However, many problems often exist in the process of ventilation in mines. For example, a large amount of dust is generated during underground operations. The dust moves with the airflow under the operation of the ventilation system, which is very harmful to the health of the workers. The dust can also greatly hinder or even damage the operation of the ventilation system. At the same time, underground operations will generate a large amount of gas, which poses a great safety hazard.

[0005] To address this, existing technologies offer several solutions. These include setting up a gas monitoring mechanism, connecting the controller to the fan's control terminal, connecting the exhaust vent to the ventilation duct, extending the ventilation duct deep into the mine shaft, and designing a two-stage airflow system to promote air circulation and improve gas removal efficiency. Existing technologies specifically address the issue of how to safely remove gas. However, while gas poses safety hazards, it is also a clean energy source. Existing technologies fail to solve the problems of automatically adjusting fan blades to switch between low-efficiency and high-efficiency ventilation states, and separating the exhaust air and gas at the exhaust system end.

[0006] In view of this, in order to overcome the above-mentioned technical problems, the present invention designs a mine ventilation system with automatic blade angle adjustment, which solves the above problems. Summary of the Invention

[0007] The technical problem to be solved by the present invention is: in the operation of the ventilation system, the switching between different states of low-efficiency ventilation is achieved by automatically adjusting the fan blades, and the exhaust air and gas are separated at the exhaust system end.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] This invention provides a mine ventilation system with automatic blade angle adjustment, comprising a bidirectional integrated ventilation duct, a fan, a control component, a separation component, and a drive component. The fan is installed inside the bidirectional integrated ventilation duct, and a control component with a span consistent with the length of the wall is installed between the walls of the bidirectional integrated ventilation duct. The control component is fixedly connected to the fan and the separation component at both ends. Driven by a power source, the control component controls and adjusts the fan blade angle. Driven by the control component, the separation component realizes intermittent separation and collection of mixed air. The drive component works with the separation component to perform two-stage energy conversion: energy storage and energy release.

[0010] A fan is installed inside the bidirectional integrated ventilation duct. The fan is the core component of the ventilation system. The fan's operation drives the blades to rotate, which in turn drives airflow. The bidirectional integrated ventilation duct is responsible for supplying air into the mine and expelling harmful gases. The two ducts are responsible for different ventilation modes. The two ducts are structurally integrated, with a gap between their outer walls. A control component is installed in this gap, which is connected to both the fan blades and the separation component. The control component's function controls the switching of different states of the fan blades. When underground operations are interrupted, there are fewer workers and less oxygen is required. The operation generates less dust. At this time, the control component controls the angle of the fan blades in the air intake duct to reduce the air supply efficiency, thereby reducing the amount of air used and effectively saving machine operating efficiency. When working underground, there are more workers and more harmful gases and dust are generated. At this time, the control component controls the angle of the fan blades in the exhaust duct to increase the ventilation efficiency of the fan, thereby efficiently treating the generated dust and harmful gases. At the same time, the control component controls the separation component to centrifuge the discharged harmful gases, thereby separating gas and air and collecting the gas.

[0011] Preferably, the bidirectional integrated ventilation duct includes an air inlet duct and an air outlet duct. A control component is installed between the connecting walls of the air inlet duct and the air outlet duct. The length of the air inlet duct is 20cm longer than that of the air outlet duct. A drive component for promoting better separation of the separation components is installed inside the air outlet duct.

[0012] The intake and exhaust ducts are two different pipes, but they are integrated into one unit, designed as a single mechanical structure. Since underground operations typically operate in three shifts, any breaks are short, as large underground machinery cannot be frequently turned on and off. Similarly, the ventilation system needs continuous operation to ensure a constant supply of fresh air. Therefore, the fans in both the intake and exhaust ducts must operate continuously. If the intake and exhaust ducts were designed to be the same length, the impact of harmful gases and dust from the exhaust duct on the intake duct would be considered, potentially causing stale air to enter and eventually reach the mine. Therefore, the intake duct is designed to be 20cm longer than the exhaust duct. This ensures that harmful gases and dust from the exhaust duct do not affect the intake duct, allowing each duct to operate independently.

[0013] Preferably, the control component includes a crank, an adjusting plate, a support column, a fixed plate, a connecting rod, a drive plate, and a push rod. An electric push rod is fixedly connected to the fixed plate. A crank is fixedly connected to the adjusting plate. A fan blade is fixedly connected to the end of the crank away from the adjusting plate. The crank swings within an angle range of 0° to 30° under the constraint of the adjusting plate. A support column is fixedly connected to the end of the adjusting plate away from the crank. A roller is rotatably connected to the lower end of the support column. A pull rod is fixedly connected to the right end of the roller. A fixed plate is fixedly connected to the right end of the pull rod. A connecting rod is fixedly connected to the lower end of the fixed plate. A drive plate is fixedly connected to the end of the connecting rod away from the fixed plate. A push rod is fixedly connected to the left end of the drive plate. The push rod reciprocates under the drive of the drive plate.

[0014] The control component is used to control other components in the ventilation system. Firstly, it controls the angle of the fan blades. When the blade angle needs adjustment, the electric actuator is activated, driving the fixed plate to move. The movement of the fixed plate pulls the rails, causing the rollers to move. The rollers move on the slide rails, pushing the support column upwards, which in turn pushes the adjustment plate to move. A crank is fixedly connected to the adjustment plate. The movement of the adjustment plate causes the crank to swing. However, due to the constraint of the fan blades, the crank's swing angle is limited. The crank's swing causes the fan blade angle to change, achieving automatic blade angle adjustment. Since the change in blade angle corresponds to its effect, a large angle of blade rotation is not required here. Therefore, the crank's swing angle range is 0° to 30°, which is sufficient to drive the blades to the required angle and make adjustments.

[0015] Preferably, the separation assembly includes a centrifugal drum, a sealing plate, and an outer cylinder. The length of the centrifugal drum is 20 cm longer than that of the outer cylinder. The centrifugal drum separates air and gas under the control of the control assembly. The sealing plate seals the centrifugal drum and the outer cylinder under the drive of the control assembly. The outer cylinder collects the air separated by the centrifugal drum. A drive assembly is fixedly connected to the upper right side of the centrifugal drum.

[0016] The separation component is used to separate the air in the exhaust duct. The exhaust air contains harmful gases, most notably methane, a flammable and explosive gas. Large amounts of methane are generated during underground operations. Simply mixing the methane-containing air before venting it outside the well is insufficient; therefore, a separation component is installed. This component uses a centrifugal drum to separate and collect the incoming mixed gas. Due to the different densities of methane and air, the air moves towards the outer wall of the drum, while the methane moves towards the center. The methane collects in the center of the drum, while the outer cylinder... For air collection, the centrifugal drum is designed to be 20cm longer than the outer cylinder. This is because the centrifugal drum is not always in its original position. Through the combined action of the control and drive components, the sealing plate is driven to move upward, sealing the centrifugal drum and the outer cylinder, thereby achieving more functions. The centrifugal drum and the fan can share a single motor because high efficiency is the priority for exhaust. Since the drum achieves gas separation through centrifugation, it naturally needs high-speed rotation to achieve efficient separation. Therefore, installing a single motor to drive the fan and the centrifugal drum is sufficient to meet the functional requirements.

[0017] Preferably, the drive assembly includes a power cylinder, a pin, a spring, a protrusion, and a slide rail. The outer wall of the power cylinder has a groove, and the pin is slidably connected to the groove. A protrusion is fixedly connected to the end of the pin away from the power cylinder. The protrusion is fixedly connected to the centrifugal drum. The end of the protrusion away from the centrifugal drum is installed in the slide rail. A spring is fixedly connected to the lower end of the protrusion inside the slide rail. The spring is fixedly connected to the lower end of the slide rail.

[0018] For a centrifugal drum to switch states, it relies on a drive assembly. Initially, the centrifugal drum is in its original position. At this time, the air and gas separated by centrifugation can be discharged through different spaces. However, since the discharged air contains a large amount of dust, dust accumulation can clog the centrifugal drum, affecting separation efficiency. If the dust is not cleaned for a long time, the centrifugal function will be lost. Therefore, the centrifugal drum cannot remain in its original position indefinitely. The structure of the drive assembly allows the centrifugal drum to move upwards, pause, and store energy. Subsequently, it performs additional functions when it falls and releases energy. The drive assembly has a pin that is fixedly connected to the centrifugal drum. When the centrifugal drum moves upwards, it carries... The moving protrusion moves upward within the slide rail, while the pin fixedly connected to the protrusion moves along the slide groove on the power cylinder, driving the power cylinder to rotate. A spring is connected to the lower end of the protrusion. After the pin moves along the slide groove and stops, it drives the protrusion to stretch the spring and store energy. Subsequently, the centrifugal drum falls downward under the control of the control component. Since the spring has previously stretched and stored energy, it must now reset, i.e., release energy, driving the protrusion to move downward, which in turn drives the centrifugal drum to fall downward. The energy released by the spring drives the centrifugal drum to fall sharply, thereby vibrating the centrifugal drum and shaking off the dust inside, ultimately ensuring that dust does not accumulate inside the centrifugal drum.

[0019] Preferably, the blades on the fan are in a bent-wing shape, and the blade flip angle range is 0° to 120°.

[0020] The blades on the fan are designed in a bent-wing shape, with the curved span of the blades being curved. This design reduces noise and vibration and improves the efficiency of the fan. The blade rotation angle is specified to be between 0° and 120°, which allows the blades to rotate around 90°. When the blade is at 90°, it is a radial blade. While radial blades are less prone to dust accumulation, their efficiency is lower. Therefore, by avoiding 90°, the blades can rotate from 0° to 120°. At 0°, the blades are very efficient but prone to dust accumulation, while at 120°, the blades are highly efficient and less prone to dust accumulation. By adjusting the blade angle, the efficiency of the fan can be switched between different states.

[0021] Preferably, a support rod is fixedly connected to the lower end of the centrifugal drum. The lower end of the support rod has a tapered notch that cooperates with the push rod. The centrifugal drum moves steadily upward and vibrates downward under the drive of the push rod.

[0022] To move the centrifugal drum upwards under the drive of the control component, a conical notch is provided at the lower right end of the centrifugal drum. The conical notch cooperates with the push rod in the control component. When the control component drives the push rod to move to the left, the cooperation of the conical structure causes the centrifugal drum to move upwards under the push of the push rod, thereby realizing the switching of different states of the centrifugal drum.

[0023] Preferably, the spring diameter is 1:10 with the centrifugal drum diameter, and the centrifugal drum is reset under the drive of the spring stretching, storing energy, and releasing it.

[0024] The ratio of spring diameter to centrifugal drum diameter is designed to be 1:10. Since the spring is fixedly connected to the protrusion and needs to store and release energy under the displacement of the protrusion, the spring drives more than just one protrusion. The protrusion is fixedly connected to the centrifugal drum. In order for the centrifugal drum to have enough energy to vibrate during the fall, the diameter of the spring must be designed reasonably. The diameter of the spring directly affects the elastic coefficient of the spring, that is, the elastic force per unit length. A thicker spring usually has a higher elastic coefficient. Designing the diameter of the spring to be larger can store more energy, which is enough to ensure that the centrifugal drum vibrates during the fall, thereby shaking off the dust.

[0025] The beneficial effects of this invention are as follows:

[0026] 1. The present invention provides a mine ventilation system with automatic blade angle adjustment, which uses a control component installed in the wall of a two-way integrated ventilation duct to drive the control component to control the automatic adjustment of the fan blade angle, thereby realizing the adjustment of fan efficiency.

[0027] 2. The present invention provides a mine ventilation system with automatic blade angle adjustment, which, through the structural design of the centrifugal drum in the separation component, enables the centrifugal drum to separate methane from the exhaust air under the joint action of the control component and the drive component.

[0028] 3. The present invention provides a mine ventilation system with automatic blade angle adjustment. Through structural design of the drive component, the drive component can store and release energy and drive intermittently under the drive of the centrifugal drum. This ensures that the centrifugal drum has sufficient energy to ensure vibration effect during its descent, thereby shaking off dust. Attached Figure Description

[0029] Figure 1 This is a perspective view of the present invention;

[0030] Figure 2 This is a cross-sectional view of the bidirectional integrated ventilation duct of the present invention;

[0031] Figure 3 This is a cross-sectional view of the fan of the present invention;

[0032] Figure 4 This is a diagram showing the internal structural connections of the present invention;

[0033] Figure 5 This is a structural diagram of the closed state of the separation component of the present invention;

[0034] Figure 6 This is a diagram showing the adjustment of the fan blade angle according to the present invention;

[0035] Figure 7 This is a partially enlarged view of the driving component of the present invention.

[0036] In the diagram: 1. Two-way integrated ventilation duct; 101. Inlet duct; 102. Exhaust duct; 2. Fan; 201. Shaft; 202. Blade; 3. Control assembly; 301. Adjustment disc; 302. Crank; 303. Support column; 304. Fixed disc; 305. Connecting rod; 306. Drive disc; 307. Push rod; 308. Pull rod; 4. Separation assembly; 401. Centrifugal drum; 402. Outer cylinder; 403. Sealing plate; 5. Drive assembly; 501. Power cylinder; 502. Pin; 503. Spring; 504. Protrusion; 6. Support rod; 7. Slide rail; 8. Roller. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0038] like Figure 1-7 As shown, a mine ventilation system with automatic blade angle adjustment includes a bidirectional integrated ventilation duct 1, a fan 2, a control component 3, a separation component 4, and a drive component 5. The fan 2 is installed inside the bidirectional integrated ventilation duct 1. The control component 3, with a span consistent with the length of the wall, is installed between the walls of the bidirectional integrated ventilation duct 1. The control component 3 is fixedly connected to the fan 2 and the separation component 4 at both ends. Driven by a power source, the control component 3 controls and adjusts the angle of the blades 202 of the fan 2. Driven by the control component 3, the separation component 4 realizes the intermittent separation and collection of mixed air. The drive component 5 cooperates with the separation component 4 to perform two-stage energy conversion of energy storage and release.

[0039] A fan 2 is installed inside the bidirectional integrated ventilation duct 1. The fan 2 is the core component of the ventilation system, consisting of a shaft 201 and blades 202. The fan 2's operation drives the blades 202 to rotate, which in turn circulates airflow. The bidirectional integrated ventilation duct 1 is responsible for supplying air into the mine and expelling harmful gases. The two ducts are responsible for different ventilation modes. The two ducts are structurally integrated, with a gap between their outer walls. A control component 3 is installed in this gap, which is connected to both the fan 2 blades 202 and a separation component 4. The control function of the control component 3 controls the switching of different states of the fan 2 blades 202. During breaks in underground operations, when there are fewer workers, [the ventilation system is more efficient]. The oxygen consumption is also relatively low, and the dust generated during underground operations is also less. At this time, the angle of the blades 202 of the fan 2 in the air intake duct 101 is changed by the control component 3, thereby reducing the air supply efficiency and realizing the function of reducing the amount of air introduced, and effectively saving the efficiency of machine operation. When there are more workers and more harmful gases and dust generated during underground operations, the angle of the blades 202 of the fan 2 in the exhaust duct 102 is changed by the control component 3, thereby increasing the ventilation efficiency of the fan 2 and achieving efficient treatment of the generated dust and harmful gases. At the same time, the control component 3 controls the separation component 4 to centrifuge the discharged harmful gases, thereby achieving the separation of gas and air and collecting the gas.

[0040] The bidirectional integrated ventilation duct 1 includes an air inlet duct 101 and an air outlet duct 102. A control component 3 is installed between the connecting walls of the air inlet duct 101 and the air outlet duct 102. The length of the air inlet duct 101 is 20cm longer than that of the air outlet duct 102. A drive component 5 is installed inside the air outlet duct 102 to promote better separation of the separation component 4.

[0041] The intake duct 101 and exhaust duct 102 are two different ducts, but they are integrated into one unit, designed as a single mechanical structure. Since a continuous supply of air is needed underground, and underground operations typically operate in three shifts, even if there are breaks, they are short-lived because large underground machinery cannot be frequently turned on and off. Similarly, the ventilation system needs continuous operation to ensure a constant supply of fresh air underground. Therefore, the fans 2 in both intake duct 101 and exhaust duct 102 need to operate continuously. If intake duct 101 and exhaust duct 102 were designed to be the same length, the harmful gases and dust discharged from the end of exhaust duct 102 would affect intake duct 101, causing stale air to enter and eventually reach the mine. Therefore, intake duct 101 is designed to be 20cm longer than exhaust duct 102, ensuring that harmful gases and dust discharged from the end of exhaust duct 102 do not affect intake duct 101. Both ducts operate independently, fulfilling their respective functions.

[0042] Control component 3 includes a crank 302, an adjusting plate 301, a support column 303, a fixed plate 304, a connecting rod 305, a drive plate 306, and a push rod 307. The fixed plate 304 is fixedly connected to an electric push rod 307. A crank 302 is fixedly connected to the adjusting plate 301. A fan blade 202 is fixedly connected to the end of the crank 302 away from the adjusting plate 301. The crank 302 swings within an angle range of 0° to 30° under the constraint of the adjusting plate 301. A support column 303 is fixedly connected to the end away from the crank 302. A roller 8 is rolledly connected to the lower end of the support column 303. A pull rod is fixedly connected to the right end of the roller 8. A fixed plate 304 is fixedly connected to the right end of the pull rod. A connecting rod 305 is fixedly connected to the lower end of the fixed plate 304. A drive plate 306 is fixedly connected to the end of the connecting rod 305 away from the fixed plate 304. A push rod 307 is fixedly connected to the left end of the drive plate 306. The push rod 307 reciprocates under the drive of the drive plate 306.

[0043] The function of control component 3 is to control other components in the ventilation system. First, it controls the angle of the blades 202 on the fan 2 to change. When the angle of the blades 202 needs to be adjusted, the electric push rod 307 is activated. The electric push rod 307 drives the fixed plate 304 to move. The movement of the fixed plate 304 pulls the rail, causing the roller 8 to move. The roller 8 moves on the slide rail 7, pushing the support column 303 upward, which in turn pushes the adjustment plate 301 to move. A crank 302 is fixedly connected to the adjustment plate 301. The movement of the adjustment plate 301 causes the crank 302 to swing. However, due to the constraint of the blades 202 on the fan 2, the swing angle of the crank 302 is limited. The swing of the crank 302 causes the angle of the blades 202 on the fan 2 to change, realizing the function of automatic adjustment of the blade angle. Since the change of the blade angle corresponds to its effect, it is not necessary for the blades 202 to undergo a large angle flip. Therefore, the swing angle range of the crank 302 is 0° to 30°, which is sufficient to drive the blades 202 to reach the required angle and make adjustments.

[0044] The separation component 4 includes a centrifugal drum 401, an outer cylinder 402, and a sealing plate 403. The centrifugal drum 401 is 20cm longer than the outer cylinder 402. Under the control of the control component 3, the centrifugal drum 401 separates air from gas. The sealing plate 403 seals the centrifugal drum 401 and the outer cylinder 402 under the drive of the control component 3. The outer cylinder 402 collects the air separated by the centrifugal drum 401. A drive component 5 is fixedly connected to the upper right side of the centrifugal drum 401.

[0045] Separation component 4 is used to separate the air inside the exhaust duct 102. The exhaust air contains harmful gases, most notably methane, a flammable and explosive gas. Large amounts of methane are generated during underground operations. Simply mixing the methane-containing air with the exhaust duct 102 before discharge is not feasible; therefore, separation component 4 is installed. This separation uses the rotation of centrifugal drum 401 to separate and collect the incoming mixed gas. Due to the different densities of methane and air, the air moves towards the outer wall of the drum, while the methane moves towards the drum's axis. The methane collects in the center of the centrifugal drum 401, while the outer cylinder 402 collects the air. The centrifugal drum 401 is designed to be 20cm longer than the outer drum 402 because the centrifugal drum 401 is not always in its original position. Through the combined action of the control component 3 and the drive component 5, the sealing plate 403 is driven to move upward, sealing the centrifugal drum 401 and the outer drum 402, thereby achieving more functions. The centrifugal drum 401 and the fan 2 can share a motor to drive it. Since high efficiency is the priority for exhaust, and the drum achieves gas separation through centrifugation, it naturally needs to rotate at a high speed to achieve efficient separation. Therefore, installing one motor to drive the fan 2 and the centrifugal drum 401 is sufficient to meet the functional requirements.

[0046] The drive assembly 5 includes a power cylinder 501, a pin 502, a protrusion 504, a spring 503, and a slide rail 7. The upper outer wall of the power cylinder 501 has a groove, and the pin 502 is slidably connected to the groove. The protrusion 504 is fixedly connected to the end of the pin 502 away from the power cylinder 501. The protrusion 504 is fixedly connected to the centrifugal drum 401. The end of the protrusion 504 away from the centrifugal drum 401 is installed in the slide rail 7. The lower end of the protrusion 504 in the slide rail 7 is fixedly connected to the spring 503. The spring 503 is fixedly connected to the lower end of the slide rail 7.

[0047] The centrifugal drum 401 requires the drive of the drive assembly 5 to achieve state switching. Initially, the centrifugal drum 401 is in its original position. At this time, the air and gas separated by centrifugation through the centrifugal drum 401 can be discharged through different spaces. However, since the discharged air contains a large amount of dust, the dust accumulation will clog the centrifugal drum 401, affecting the separation efficiency. If the dust is not cleaned for a long time, the centrifugal function will be lost. Therefore, the centrifugal drum 401 cannot remain in its original position indefinitely. The structure of the drive assembly 5 allows the centrifugal drum 401 to move upward and then remain there to store energy. Subsequently, it performs additional functions when it falls and releases energy. The pin 502 in the drive assembly 5 is fixedly connected to the centrifugal drum 401. When the centrifugal drum 401 moves upward, it drives the protrusion 504 to move upward within the slide rail 7. Simultaneously, the pin 502, which is fixedly connected to the protrusion 504, moves along the slide groove on the power cylinder 501, driving the power cylinder 501 to rotate. The lower end of the protrusion 504 is connected to the spring 503. After the pin 502 moves along the slide groove and stops, it drives the protrusion 504 to stretch and store energy. Then, the centrifugal drum 401 falls downward under the control of the control component 3. Since the spring 503 has previously stretched and stored energy, the spring 503 needs to reset at this time, that is, release energy, driving the protrusion 504 to move downward, thereby driving the centrifugal drum 401 to fall downward. The energy released by the spring 503 drives the centrifugal drum 401 to fall sharply downward, thereby realizing the vibration of the centrifugal drum 401, which in turn shakes off the dust inside the centrifugal drum 401, ultimately ensuring that the dust does not accumulate inside the centrifugal drum 401.

[0048] The blades 202 on the fan 2 are bent wing-shaped, and the rotation angle of the blades 202 ranges from 0° to 120°.

[0049] The blades 202 on the fan 2 are designed as bent wing shapes. The curved span of the blades 202 is curved. The advantage of this design is that it reduces noise and vibration and improves the efficiency of the fan 2. The rotation angle range of the blades 202 is specified to be from 0° to 120°. This allows the blades 202 to rotate to avoid 90°. When the blades 202 are at 90°, they are radial blades 202. Although radial blades 202 are not prone to dust accumulation, their efficiency is low. Therefore, by avoiding 90°, the blades 202 can rotate from 0° to 120°. At 0°, the blades 202 are very efficient, but they are prone to dust accumulation. At 120°, the blades 202 are highly efficient and not prone to dust accumulation. By adjusting the angle of the blades 202, the efficiency of the fan 2 can be switched between different states.

[0050] A support rod 6 is fixedly connected to the lower end of the centrifugal drum 401. The lower end of the support rod 6 has a tapered notch and cooperates with the push rod 307. Under the drive of the push rod 307, the centrifugal drum 401 steadily rises and vibrates downwards to return to its original position.

[0051] To move the centrifugal drum 401 upward under the drive of the control component 3, a support rod 6 is fixedly installed at the lower end of the centrifugal drum 401. The lower end of the support rod 6 has a tapered notch that cooperates with the push rod 307. When the control component 3 drives the push rod 307 to move to the left, the tapered structure allows the centrifugal drum 401 to move upward under the push of the push rod 307, thereby realizing the switching of different states of the centrifugal drum 401.

[0052] The diameter of spring 503 is 1:10 with the diameter of centrifugal drum 401. Centrifugal drum 401 is reset under the drive of spring 503 stretching, storing energy and releasing it.

[0053] The ratio of the diameter of spring 503 to the diameter of centrifugal drum 401 is designed to be 1:10. Since spring 503 is fixedly connected to protrusion 504 and needs to store and release energy under the displacement of protrusion 504, spring 503 drives more than just protrusion 504. Protrusion 504 is fixedly connected to centrifugal drum 401. In order for centrifugal drum 401 to have enough energy to vibrate during the fall, the diameter of spring 503 must be designed reasonably. The diameter of spring 503 directly affects the elastic coefficient of spring 503, that is, the elastic force per unit length. A thicker spring 503 usually has a higher elastic coefficient. Designing the diameter of spring 503 to be larger can store more energy, which is enough to ensure that centrifugal drum 401 vibrates during the fall, thereby shaking off the dust.

[0054] During the operation of the ventilation system, air intake and exhaust occur simultaneously. The intake duct 101 and exhaust duct 102 are integrated. Since there is no air underground, fresh air needs to be continuously supplied to the mine. Therefore, the fan 2 in the intake duct 101 must run continuously. However, underground operations are not continuous. When there is a break in the shift work, there are fewer underground workers and less air is needed. In order to save the efficiency of mechanical work, and at the same time, the fan 2 cannot be turned on and off continuously, the control component 3 controls the blade 202 angle to be automatically adjusted. By opening the electric push rod 307, the adjustment plate 301 in the control component 3 is pushed to the left. The movement of the adjustment plate 301 drives the crank 302 to swing, which in turn drives the blade 202 on the fan 2 in the intake duct 101 to rotate to 120°, reducing the efficiency of the fan 2 and reducing the ventilation volume. The exhaust duct 102 is mainly for expelling harmful gases and dust from the mine. At the same time as opening the electric push rod 307, the control component 3 is driven to adjust the blade 202 angle. Whether the blade 202 is adjusted to 120° or remains at 0°, the exhaust efficiency will not change significantly. At this time, the movement of the adjusting disc 301 also causes the blades 202 on the fan 2 inside the exhaust duct 102 to adjust their angle. Simultaneously, the movement of the adjusting disc 301 causes the connecting rod 305 to move. The other end of the connecting rod 305 is fixedly connected to a drive disc 306, which also moves to the left. A push rod 307 is fixedly connected to the left end of the drive disc 306. Driven by the drive disc 306, the push rod 307 moves to the left. The end of the push rod 307 away from the drive disc 306 is tapered, and this tapered end engages with the tapered notch at the lower right end of the centrifugal drum 401, squeezing and pushing the centrifugal drum 401 upwards. The rotation of the centrifugal drum 401 is synchronized with the rotation of the fan 2 inside the exhaust duct 102. To avoid dust accumulation, after the centrifugal drum 401 moves upwards, it causes the protrusion 504 to move upwards within the slide rail 7. The protrusion 504... The spring 503, which is fixedly connected to the lower part of the motor, is stretched and stores energy. At the same time, the pin 502, which is fixedly connected to the right end of the protrusion 504, stays in the groove on the power cylinder 501. When the electric push rod 307 is started again to drive the adjustment plate 301 to move to the right and reset, the pin 502 also begins to move in the groove, and the centrifugal drum 401 begins to fall. At this time, the spring 503 releases the energy that was just stored, so that the centrifugal drum 401 vibrates during the fall, achieving the purpose of shaking off dust. This process is repeated to achieve the purpose of dust removal and to separate the exhaust air and gas, thus completing the function of the entire ventilation system.

[0055] The foregoing has shown and described the basic principles and beneficial effects of the present invention. However, the present invention is not limited to the above embodiments. Various changes and modifications can be made to the present invention without departing from its effects and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mine ventilation system with automatic blade angle adjustment, characterized in that: The system includes a bidirectional integrated ventilation duct (1), a fan (2), a control component (3), a separation component (4), and a drive component (5). The bidirectional integrated ventilation duct (1) is equipped with a fan (2). The bidirectional integrated ventilation duct (1) is equipped with a control component (3) whose span is consistent with the length of the wall. The control component (3) is fixedly connected to the fan (2) and the separation component (4) at both ends. The control component (3) controls and adjusts the angle of the fan (202) blades (202) under the drive of the power source. The separation component (4) realizes the intermittent separation and collection of mixed air under the drive of the control component (3). The drive component (5) cooperates with the separation component (4) to perform two-stage energy conversion of energy storage and energy release.

2. The mine ventilation system with automatic blade angle adjustment according to claim 1, characterized in that: The bidirectional integrated ventilation duct (1) includes an air inlet duct (101) and an air outlet duct (102). A control component (3) is installed between the connecting walls of the air inlet duct (101) and the air outlet duct (102). The length of the air inlet duct (101) is 20cm longer than that of the air outlet duct (102). A drive component (5) for promoting better separation of the separation component (4) is installed inside the air outlet duct (102).

3. The mine ventilation system with automatic blade angle adjustment according to claim 1, characterized in that: The control component (3) includes a crank (302), an adjusting plate (301), a support column (303), a fixed plate (304), a connecting rod (305), a drive plate (306), and a push rod (307). An electric push rod is fixedly connected to the fixed plate (304). A crank (302) is fixedly connected to the adjusting plate (301). A fan blade (202) is fixedly connected to the end of the crank (302) furthest from the adjusting plate (301). The crank (302) swings within an angle range of 0° to 30° under the constraint of the adjusting plate (301). The adjusting plate (301) furthest from the adjusting plate (301) is... A support column (303) is fixedly connected to one end of the crank (302). A roller (8) is rolledly connected to the lower end of the support column (303). A pull rod (308) is fixedly connected to the right end of the roller (8). A fixed plate (304) is fixedly connected to the right end of the pull rod. A connecting rod (305) is fixedly connected to the lower end of the fixed plate (304). A drive plate (306) is fixedly connected to the end of the connecting rod (305) away from the fixed plate (304). A push rod (307) is fixedly connected to the left end of the drive plate (306). The push rod (307) reciprocates under the drive of the drive plate (306).

4. The mine ventilation system with automatic blade angle adjustment according to claim 1, characterized in that: The separation component (4) includes a centrifugal drum (401), an outer cylinder (402), and a sealing plate (403). The centrifugal drum (401) is 20 cm longer than the outer cylinder (402). The centrifugal drum (401) separates air and gas under the control of the control component (3). The sealing plate (403) seals the centrifugal drum (401) and the outer cylinder (402) under the drive of the control component (3). A drive component (5) is fixedly connected to the upper right side of the centrifugal drum (401).

5. The mine ventilation system with automatic blade angle adjustment according to claim 1, characterized in that: The drive assembly (5) includes a power cylinder (501), a pin (502), a spring (503), a protrusion (504), and a slide rail (7). The outer wall of the power cylinder (501) is provided with a sliding groove, and the pin (502) is slidably connected to the sliding groove. The end of the pin (502) away from the power cylinder (501) is fixedly connected to the protrusion (504). The protrusion (504) is fixedly connected to the centrifugal drum (401). The end of the protrusion (504) away from the centrifugal drum (401) is installed in the slide rail (7). The lower end of the part of the protrusion (504) inside the slide rail (7) is fixedly connected to the spring (503). The spring (503) is fixedly connected to the lower end of the slide rail (7).

6. The mine ventilation system with automatic blade angle adjustment according to claim 1, characterized in that: The blades (202) of the fan (2) are in the shape of bent wings, and the rotation angle of the blades (202) is in the range of 0° to 120°.

7. The mine ventilation system with automatic blade angle adjustment according to claim 4, characterized in that: The centrifugal drum (401) is fixedly connected to a support rod (6) at its lower end. The support rod (6) has a tapered notch at its lower end and cooperates with a push rod (307). The centrifugal drum (401) moves steadily upward and vibrates downward under the drive of the push rod (307).

8. A mine ventilation system with automatic blade angle adjustment according to claim 5, characterized in that: The diameter of the spring (503) is 1:10 with the diameter of the centrifugal drum (401). The centrifugal drum (401) is reset under the drive of the spring (503) stretching, storing energy and releasing it.

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