Safe and energy-saving mixed ventilation device for industrial factory building

Abstract

The utility model relates to the technical field of building ventilation devices, in particular to an industrial factory building safe energy-saving mixed ventilation device which comprises a vertical cylinder and a transverse pipe, the open end of the vertical cylinder communicates with a factory building, one end of the transverse pipe communicates with the interior of the vertical cylinder, and the other end of the transverse pipe communicates with the outside. An air draft blade is arranged in the vertical cylinder and located on the rotating shaft, a driving mechanism for driving the rotating shaft to rotate is arranged on the vertical cylinder, the driving mechanism comprises a pneumatic driving part, an electric driving part and an opening and closing assembly, and the electric driving part and the pneumatic driving part can independently drive the rotating shaft to rotate; the separating and combining assembly is used for transmitting torque on the electric driving part or the pneumatic driving part to the rotating shaft, the pneumatic driving part comprises a pneumatic shaft which is rotationally arranged on the vertical cylinder and is coaxial with the rotating shaft, and the end, opposite to the rotating shaft, of the pneumatic shaft extends out of the vertical cylinder and is provided with pneumatic blades. The system has the effect of reducing the power consumption of the industrial factory building.

Description

Technical Field

[0001] The present application relates to the technical field of building ventilation devices, and in particular to a safe and energy-saving mixed ventilation device for industrial plants. Background Art

[0002] Industrial plants are mainly used for the production and storage of products. In order to obtain enough fresh air in the plant and improve the environment and air quality in the plant, the plant needs to be ventilated. Usually, ventilation devices are used to remove the waste heat in the personnel activity area, the heat generated by the production machinery, dirty gases and harmful gases that affect human health, and then introduce fresh air from the outside into the plant.

[0003] Chinese patent publication number CN115355585A discloses an energy-saving ventilation device for industrial plant design, including a ventilation duct, and a fan is provided at the air outlet end of the ventilation duct.

[0004] In the above technology, the fan needs to be powered on all the time to continuously ventilate the industrial plant, which causes the industrial plant to consume a large amount of electricity for fan operation, thus increasing the operating cost of the industrial plant and thus having shortcomings. Utility Model Content

[0005] In order to reduce the operating costs of industrial plants, the present application provides a safe and energy-saving mixed ventilation device for industrial plants.

[0006] The present application provides a safe and energy-saving mixed ventilation device for industrial plants, which adopts the following technical solutions:

[0007] A safe and energy-saving mixed ventilation device for industrial plants, comprising a vertical cylinder and a horizontal pipe, wherein the open end of the vertical cylinder is connected to the plant, one end of the horizontal pipe is connected to the interior of the vertical cylinder, and the other end is connected to the outside world, a rotating shaft is rotatably arranged in the vertical cylinder, exhaust blades are arranged in the vertical cylinder and on the rotating shaft, a driving mechanism for driving the rotating shaft to rotate is arranged on the vertical cylinder, the driving mechanism comprises a pneumatic drive member, an electric drive member and a separation and combination assembly, both of which can drive the rotating shaft to rotate independently, the separation and combination assembly is used to transfer the torque on the electric drive member or the pneumatic drive member to the rotating shaft, the pneumatic drive member comprises a pneumatic shaft rotatably arranged on the vertical cylinder and coaxially arranged with the rotating shaft, and one end of the pneumatic shaft facing away from the rotating shaft extends outside the vertical cylinder and is provided with pneumatic blades.

[0008] By adopting the above technical scheme, when the external airflow drives the pneumatic blades to rotate, the pneumatic blades drive the pneumatic shaft to rotate, and the separation and combination assembly transfers the torque on the pneumatic shaft to the rotating shaft, and the rotating shaft drives the exhaust blades to rotate. The rotation of the exhaust blades draws the air in the factory through the cross pipe to the outside atmosphere. When the pneumatic blades are not rotating, the separation and combination assembly transfers the torque on the electric drive component to the rotating shaft, so that the rotating shaft drives the exhaust blades to rotate. By utilizing the external airflow to drive the exhaust blades to rotate, it is beneficial to save the consumption of electricity due to exhaust in the factory, thereby reducing the operating cost of the factory.

[0009] Optionally, a bracket is provided in the vertical cylinder, and the separation and combination assembly includes a separation and combination shaft which is coaxially and slidably provided between the rotating shaft and the pneumatic shaft, the separation and combination shaft rotates in cooperation with the bracket, a plug rod shaft with a polygonal cross-section is coaxially provided at one end of the separation and combination shaft close to the rotating shaft, the plug rod shaft is plugged in cooperation with the rotating shaft, a transmission rod is provided at one end of the separation and combination shaft close to the pneumatic shaft, there is a spacing between the transmission rod and the pneumatic shaft, there is a spacing between the axis of the transmission rod and the axis of the separation and combination shaft, a transmission slot for the transmission rod to be plugged in is provided on the pneumatic shaft, and a lifting member for driving the separation and combination shaft to slide is provided in the vertical cylinder.

[0010] By adopting the above technical solution, when the external airflow drives the pneumatic shaft to rotate through the pneumatic blades, the lifting member drives the separation and combination shaft to slide, the separation and combination shaft drives the transmission rod to be inserted into the transmission groove on the pneumatic shaft, the pneumatic shaft drives the separation and combination shaft to rotate, and the separation and combination shaft drives the rotating shaft to rotate through the insertion rod shaft, thereby achieving the effect of the rotating shaft driving the exhaust blades to rotate.

[0011] Optionally, the lifting member includes a lifting cylinder disposed in the vertical tube and electrically connected to the control system, the piston rod of the lifting cylinder is provided with an end ring, the end ring abuts against the separation and combination shaft, and the end ring is slidably sleeved on the insertion rod shaft.

[0012] By adopting the above technical solution, the control system drives the lifting cylinder, the piston rod of the lifting cylinder drives the end ring to rise, and the end ring pushes the separation and combination shaft to rise, so that the transmission rod is inserted into the transmission groove on the pneumatic shaft, thereby achieving the effect of the pneumatic shaft driving the separation and combination shaft to rotate.

[0013] Optionally, a guide rod is coaxially arranged at one end of the separation and combination shaft close to the pneumatic shaft, and the end of the guide rod facing away from the separation and combination shaft extends into the pneumatic shaft and is plug-fitted with the pneumatic shaft.

[0014] By adopting the above technical solution, the guide rod is helpful to reduce the possibility that the transmission rod cannot be inserted into the transmission notch on the pneumatic shaft.

[0015] Optionally, the electric drive component includes a driving motor arranged on the vertical cylinder and electrically connected to the control system, a synchronous wheel is rotatably arranged on the bracket, the synchronous wheel is sleeved on the separation and combination shaft, a positioning block is arranged on the separation and combination shaft, a positioning slot for the positioning block to be plugged into is opened on the synchronous wheel, and a synchronous belt is arranged between the output shaft of the driving motor and the synchronous wheel.

[0016] By adopting the above technical scheme, when the lifting cylinder pushes the splitting and combining shaft to rise and the transmission rod is inserted into the transmission slot on the pneumatic shaft, the splitting and combining shaft drives the positioning block to separate from the positioning slot on the synchronous wheel, so that the pneumatic shaft drives the rotating shaft to rotate through the splitting and combining shaft. When the lifting cylinder drives the splitting and combining shaft to descend and the transmission rod is separated from the transmission slot, the positioning block on the splitting and combining shaft is inserted into the positioning slot of the synchronous wheel. At this time, the control system starts the drive motor, and the drive motor drives the synchronous wheel to rotate through the synchronous belt, and the synchronous wheel drives the splitting and combining shaft to rotate through the positioning block and the positioning slot, thereby realizing the process of the splitting and combining shaft driving the rotating shaft to rotate.

[0017] Optionally, a first speed sensor and a second speed sensor are provided in the vertical cylinder, the sensing end of the first speed sensor points to the pneumatic shaft, the sensing end of the second speed sensor points to the rotating shaft, and the first speed sensor and the second speed sensor are both electrically connected to the control system.

[0018] By adopting the above technical solution, the first speed sensor and the second speed sensor feed back the speeds of the pneumatic shaft and the rotating shaft to the control system. When the speed of the pneumatic shaft is greater than the speed required for the rotating shaft to work, the control system starts the lifting cylinder, and the piston rod of the lifting cylinder pushes the separation and combination shaft to rise, so that the transmission rod is inserted into the transmission slot and the positioning block is separated from the positioning slot. At the same time, the control system controls the drive motor to stop working. When the speed of the pneumatic shaft is less than the speed required for the rotating shaft to work, the control system controls the lifting cylinder not to work and controls the drive motor to work.

[0019] Optionally, an end plate is provided on the insertion rod shaft, and the end plate is located on the side of the end ring facing away from the separation and combination shaft.

[0020] By adopting the above technical solution, when the lifting cylinder drives the end ring to descend, the end ring drives the separation and combination shaft to descend by pushing the end plate, which is helpful to reduce the possibility that the separation and combination shaft cannot descend due to insufficient gravity.

[0021] Optionally, a plurality of pneumatic blades are arranged on the pneumatic shaft, the plurality of pneumatic blades are distributed circumferentially relative to the axis of the pneumatic shaft, and the cross-section of the pneumatic blades is hemispherical.

[0022] By adopting the above technical solution, the surface area of ​​the wind blades is increased, which is conducive to the airflow to drive the wind blades to rotate more easily.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. When the external airflow drives the pneumatic blades to rotate, the pneumatic blades drive the pneumatic shaft to rotate, and the splitting and combining assembly transfers the torque on the pneumatic shaft to the rotating shaft, and the rotating shaft drives the exhaust blades to rotate. The exhaust blades rotate to extract the air in the plant through the horizontal pipe to the outside atmosphere. When the pneumatic blades do not rotate, the splitting and combining assembly transfers the torque on the electric drive component to the rotating shaft, so that the rotating shaft drives the exhaust blades to rotate. By using the external airflow to drive the exhaust blades to rotate, it is helpful to save the power consumption of the plant due to exhaust, thereby reducing the operating cost of the plant;

[0025] 2. When the lifting cylinder pushes the split-and-combination shaft to rise, and the transmission rod is inserted into the transmission notch on the pneumatic shaft, the split-and-combination shaft drives the positioning block to separate from the positioning notch on the synchronous wheel, so that the pneumatic shaft drives the rotating shaft to rotate through the split-and-combination shaft. When the lifting cylinder drives the split-and-combination shaft to descend, and the transmission rod is separated from the transmission notch, the positioning block on the split-and-combination shaft is inserted into the positioning notch of the synchronous wheel. At this time, the control system starts the drive motor, and the drive motor drives the synchronous wheel to rotate through the synchronous belt, and the synchronous wheel drives the split-and-combination shaft to rotate through the positioning block and the positioning notch, thereby realizing the process of the split-and-combination shaft driving the rotating shaft to rotate;

[0026] 3. The first speed sensor and the second speed sensor feed back the speeds of the pneumatic shaft and the rotating shaft to the control system. When the speed of the pneumatic shaft is greater than the speed required for the rotating shaft to work, the control system starts the lifting cylinder, and the piston rod of the lifting cylinder pushes the separation and combination shaft to rise, so that the transmission rod is inserted into the transmission slot and the positioning block is separated from the positioning slot. At the same time, the control system controls the drive motor to stop working. When the speed of the pneumatic shaft is less than the speed required for the rotating shaft to work, the control system controls the lifting cylinder not to work and controls the drive motor to work. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application.

[0028] Figure 2 It is a partial cross-sectional view showing the positional relationship among the vertical tube, the horizontal tube and the exhaust blades in the embodiment of the present application.

[0029] Figure 3 It is a cross-sectional view showing the positional relationship among the rotating shaft, the splitting and combining shaft and the pneumatic shaft in the embodiment of the present application.

[0030] Figure 4 yes Figure 2 Enlarged view of part A.

[0031] Explanation of the reference numerals: 1. vertical tube; 2. horizontal tube; 3. rotating shaft; 4. exhaust blade; 5. driving mechanism; 51. pneumatic driving member; 511. pneumatic shaft; 512. pneumatic blade; 52. electric driving member; 521. driving motor; 522. synchronous wheel; 523. positioning block; 524. positioning notch; 525. synchronous belt; 53. separation and combination assembly; 531. separation and combination shaft; 532. rod insertion shaft; 533. transmission rod; 534. transmission notch; 535. lifting member; 5351. lifting cylinder; 5352. end ring; 6. bracket; 7. guide rod; 8. first speed sensor; 9. second speed sensor; 10. end plate; 11. rotating frame; 12. rod insertion groove; 13. guide rod groove; 14. transmission ring; 15. mounting frame; 16. connecting plate; 17. cover; 18. avoidance notch. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] The embodiment of the present application discloses a safe and energy-saving mixed ventilation device for industrial plants.

[0034] Reference Figure 1 A safe and energy-saving mixed ventilation device for an industrial plant includes a vertical tube 1 and a horizontal pipe 2. The vertical tube 1 is vertically arranged and hollow inside with an open bottom. The open end of the vertical tube 1 is connected to the top of the plant. One end of the horizontal pipe 2 is connected to the inside of the vertical tube 1, and the other end is connected to the outside. A bracket 6 and a rotating frame 11 are bolted inside the vertical tube 1. A rotating shaft 3 coaxial with the vertical tube 1 is rotatably arranged on the rotating frame 11. An exhaust blade 4 is bolted inside the vertical tube 1 and located on the rotating shaft 3.

[0035] Reference Figure 2 , Figure 3 and Figure 4 A driving mechanism 5 for driving the rotating shaft 3 to rotate is arranged on the vertical cylinder 1. The driving mechanism 5 includes a pneumatic driving member 51, an electric driving member 52 and a separation and combination assembly 53. The electric driving member 52 and the pneumatic driving member 51 can both independently drive the rotating shaft 3 to rotate. The separation and combination assembly 53 is used to transmit the torque on the electric driving member 52 or the pneumatic driving member 51 to the rotating shaft 3.

[0036] Reference Figure 2 , Figure 3 and Figure 4 The pneumatic drive component 51 includes a pneumatic shaft 511 which is rotatably arranged on the vertical cylinder 1 and coaxially arranged with the rotating shaft 3. One end of the pneumatic shaft 511 which is away from the rotating shaft 3 extends to the outside of the vertical cylinder 1 and is welded with a plurality of pneumatic blades 512. The plurality of pneumatic blades 512 are evenly distributed circumferentially relative to the axis of the pneumatic shaft 511, and the cross-section of the pneumatic blades 512 is hemispherical.

[0037] When the airflow on the roof of the factory building drives the pneumatic blades 512 to rotate, the pneumatic blades 512 drive the pneumatic shaft 511 to rotate, and the separation and combination component 53 transmits the torque on the pneumatic shaft 511 to the rotating shaft 3. The rotating shaft 3 drives the exhaust blades 4 to rotate. The exhaust blades 4 rotate and draw the hot air in the factory building from the open end of the vertical tube 1 and discharge it to the outside air through the horizontal pipe 2.

[0038] Reference Figure 2 , Figure 3 and Figure 4 The separation and combination assembly 53 includes a separation and combination shaft 531 which is coaxially and slidably arranged between the rotating shaft 3 and the pneumatic shaft 511. The separation and combination shaft 531 is rotatably matched with the bracket 6. An insertion rod shaft 532 with a polygonal cross-section is coaxially welded to one end of the separation and combination shaft 531 close to the rotating shaft 3. The insertion rod shaft 532 is plugged into the rotating shaft 3, and an insertion rod groove 12 is opened on the rotating shaft 3 for the insertion of the insertion rod shaft 532.

[0039] Reference Figure 2 , Figure 3 and Figure 4 A guide rod 7 is coaxially welded to one end of the separation and combination shaft 531 close to the pneumatic shaft 511, and the end of the guide rod 7 facing away from the separation and combination shaft 531 extends into the pneumatic shaft 511 and is plugged into the pneumatic shaft 511. The pneumatic shaft 511 is provided with a guide rod groove 13 for the guide rod 7 to be plugged in. A transmission rod 533 is welded to one end of the separation and combination shaft 531 close to the pneumatic shaft 511, and there is a distance between the transmission rod 533 and the pneumatic shaft 511.

[0040] Reference Figure 2 , Figure 3 and Figure 4 There is a distance between the axis of the transmission rod 533 and the axis of the separation and combination shaft 531. A transmission ring 14 is welded on the end of the pneumatic shaft 511 close to the separation and combination shaft 531. The transmission ring 14 is provided with a transmission slot 534 for the transmission rod 533 to be inserted. A lifting member 535 for driving the separation and combination shaft 531 to slide is arranged in the vertical cylinder 1.

[0041] Reference Figure 2 , Figure 3 and Figure 4 The lifting member 535 includes a mounting frame 15 welded inside the vertical tube 1, and a lifting cylinder 5351 electrically connected to the control system is bolted to the mounting frame 15. A connecting plate 16 is welded to the piston rod of the lifting cylinder 5351, and an end ring 5352 is welded to the connecting plate 16. The end ring 5352 abuts against the separation and combination shaft 531, and the end ring 5352 is slidably sleeved on the insertion rod shaft 532. An end plate 10 is welded to the insertion rod shaft 532, and the end plate 10 is located on the side of the end ring 5352 that is away from the separation and combination shaft 531.

[0042] Reference Figure 2 , Figure 3 and Figure 4A first speed sensor 8 and a second speed sensor 9 are arranged in the vertical tube 1. The second speed sensor 9 is bolted to the rotating frame 11. The sensing end of the first speed sensor 8 points to the pneumatic shaft 511, and the sensing end of the second speed sensor 9 points to the rotating shaft 3. The first speed sensor 8 and the second speed sensor 9 are both electrically connected to the control system.

[0043] The first speed sensor 8 and the second speed sensor 9 feed back the speeds of the pneumatic shaft 511 and the rotating shaft 3 to the control system. When the speed of the pneumatic shaft 511 is greater than the speed required for the rotating shaft 3 to work, the control system starts the lifting cylinder 5351, and the piston rod of the lifting cylinder 5351 drives the connecting plate 16 to rise, and the connecting plate 16 drives the end ring 5352 to push the separation and combination shaft 531 to rise, and the transmission rod 533 on the separation and combination shaft 531 is inserted into the transmission groove 534 on the transmission ring 14, so that the pneumatic shaft 511 drives the rotating shaft 3 to rotate through the separation and combination shaft 531, thereby causing the rotating shaft 3 to drive the exhaust blade 4 to rotate.

[0044] Reference Figure 2 , Figure 3 and Figure 4 The electric drive component 52 includes a drive motor 521 bolted to the outside of the vertical tube 1 and electrically connected to the control system. A cover 17 is bolted to the vertical tube 1. The drive motor 521 is located in the cover 17. A synchronous wheel 522 is rotatably arranged on the bracket 6, and the synchronous wheel 522 is sleeved on the separation and combination shaft 531.

[0045] Reference Figure 2 , Figure 3 and Figure 4 A plurality of positioning blocks 523 are welded on the separation and combination shaft 531, and a plurality of positioning notches 524 for the positioning blocks 523 to be inserted are opened on the synchronous wheel 522. The positioning blocks 523 correspond to the positioning notches 524 one by one. The output shaft of the driving motor 521 and the synchronous wheel 522 are driven by a synchronous belt 525, and an avoidance notch 18 for the synchronous belt 525 to pass through is opened between the inner and outer walls of the vertical cylinder 1.

[0046] When the rotation speed of the pneumatic shaft 511 is less than the rotation speed required for the rotating shaft 3 to work, the control system starts the lifting cylinder 5351, and the piston rod of the lifting cylinder 5351 drives the connecting plate 16 to descend, and the connecting plate 16 drives the end ring 5352 to descend, and the end ring 5352 drives the separation and combination shaft 531 to descend by pushing the end plate 10, so that the positioning block 523 on the separation and combination shaft 531 is inserted into the positioning slot 524 on the synchronous wheel 522, and at the same time, the transmission rod 533 is separated from the transmission slot 534 on the transmission ring 14.

[0047] Then the control system starts the drive motor 521, and the drive motor 521 drives the synchronous wheel 522 to rotate through the synchronous belt 525. Since the positioning block 523 is stuck in the positioning groove 524 of the synchronous wheel 522, the synchronous wheel 522 drives the separation and combination shaft 531 to rotate, so that the separation and combination shaft 531 drives the rotating shaft 3 to rotate, and finally the rotating shaft 3 drives the exhaust blade 4 to rotate.

[0048] The implementation principle of a safe and energy-saving mixed ventilation device for an industrial plant in an embodiment of the present application is as follows: when the airflow on the roof of the plant drives the pneumatic blades 512 to rotate, the pneumatic blades 512 drive the pneumatic shaft 511 to rotate, and the separation and combination component 53 transmits the torque on the pneumatic shaft 511 to the rotating shaft 3, and the rotating shaft 3 drives the exhaust blades 4 to rotate, and the exhaust blades 4 rotate and draw the hot air in the plant from the open end of the vertical tube 1, and discharge it to the outside air through the horizontal pipe 2.

[0049] When the rotation speed of the pneumatic shaft 511 is less than the rotation speed required for the rotating shaft 3 to work, the control system starts the lifting cylinder 5351, and the piston rod of the lifting cylinder 5351 drives the connecting plate 16 to descend, and the connecting plate 16 drives the end ring 5352 to descend, and the end ring 5352 drives the separation and combination shaft 531 to descend by pushing the end plate 10, so that the positioning block 523 on the separation and combination shaft 531 is inserted into the positioning slot 524 on the synchronous wheel 522, and at the same time, the transmission rod 533 is separated from the transmission slot 534 on the transmission ring 14.

[0050] Then the control system starts the drive motor 521, and the drive motor 521 drives the synchronous wheel 522 to rotate through the synchronous belt 525. Since the positioning block 523 is stuck in the positioning groove 524 of the synchronous wheel 522, the synchronous wheel 522 drives the separation and combination shaft 531 to rotate, so that the separation and combination shaft 531 drives the rotating shaft 3 to rotate, and finally the rotating shaft 3 drives the exhaust blade 4 to rotate.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A safe and energy-saving mixed ventilation device for industrial plants, characterized by: The invention comprises a vertical tube (1) and a horizontal tube (2), wherein the open end of the vertical tube (1) is connected to a factory building, one end of the horizontal tube (2) is connected to the interior of the vertical tube (1), and the other end is connected to the outside world, a rotating shaft (3) is rotatably arranged in the vertical tube (1), a suction blade (4) is arranged in the vertical tube (1) and on the rotating shaft (3), and a driving mechanism (5) for driving the rotating shaft (3) to rotate is arranged on the vertical tube (1), and the driving mechanism (5) comprises a pneumatic driving member (51), an electric driving member (52) and a separation and combination assembly (5 3), the electric drive member (52) and the pneumatic drive member (51) are both capable of independently driving the rotating shaft (3) to rotate, the splitting and combining assembly (53) is used to transmit the torque on the electric drive member (52) or the pneumatic drive member (51) to the rotating shaft (3), the pneumatic drive member (51) comprises a pneumatic shaft (511) rotatably arranged on the vertical cylinder (1) and coaxially arranged with the rotating shaft (3), the end of the pneumatic shaft (511) facing away from the rotating shaft (3) extends outside the vertical cylinder (1) and is provided with a pneumatic blade (512).

2. The safe and energy-saving mixed ventilation device for industrial plants according to claim 1 is characterized by: A bracket (6) is arranged inside the vertical tube (1); the split-and-combine assembly (53) comprises a split-and-combine shaft (531) coaxially and slidably arranged between the rotating shaft (3) and the pneumatic shaft (511); the split-and-combine shaft (531) is rotatably matched with the bracket (6); an insertion rod shaft (532) having a polygonal cross section is coaxially arranged at one end of the split-and-combine shaft (531) close to the rotating shaft (3); the insertion rod shaft (532) is plug-engaged with the rotating shaft (3); and the split-and-combine shaft (531) is rotatably matched with the bracket (6). A transmission rod (533) is arranged at one end of the vertical cylinder (1) close to the pneumatic shaft (511), there is a distance between the transmission rod (533) and the pneumatic shaft (511), there is a distance between the axis of the transmission rod (533) and the axis of the separation and combination shaft (531), the pneumatic shaft (511) is provided with a transmission slot (534) for the transmission rod (533) to be inserted, and a lifting member (535) for driving the separation and combination shaft (531) to slide is arranged in the vertical cylinder (1).

3. The safe and energy-saving mixed ventilation device for industrial plants according to claim 2 is characterized by: The lifting member (535) includes a lifting cylinder (5351) which is arranged in the vertical tube (1) and electrically connected to the control system. An end ring (5352) is arranged on the piston rod of the lifting cylinder (5351). The end ring (5352) abuts against the separation and combination shaft (531). The end ring (5352) is slidably sleeved on the insertion rod shaft (532).

4. The safe and energy-saving mixed ventilation device for industrial plants according to claim 2 is characterized in that: A guide rod (7) is coaxially arranged at one end of the separation and combination shaft (531) close to the pneumatic shaft (511); an end of the guide rod (7) facing away from the separation and combination shaft (531) extends into the pneumatic shaft (511) and is plug-fitted with the pneumatic shaft (511).

5. The safe and energy-saving mixed ventilation device for industrial plants according to claim 2 is characterized by: The electric drive member (52) comprises a drive motor (521) which is arranged on the vertical cylinder (1) and is electrically connected to a control system; a synchronous wheel (522) is rotatably arranged on the bracket (6); the synchronous wheel (522) is sleeved on a separation and combination shaft (531); a positioning block (523) is arranged on the separation and combination shaft (531); a positioning notch (524) for the positioning block (523) to be inserted is provided on the synchronous wheel (522); and a synchronous belt (525) is arranged between the output shaft of the drive motor (521) and the synchronous wheel (522).

6. The safe and energy-saving mixed ventilation device for industrial plants according to claim 1, characterized in that: A first rotation speed sensor (8) and a second rotation speed sensor (9) are arranged in the vertical tube (1); the sensing end of the first rotation speed sensor (8) points to the pneumatic shaft (511), and the sensing end of the second rotation speed sensor (9) points to the rotating shaft (3); the first rotation speed sensor (8) and the second rotation speed sensor (9) are both electrically connected to a control system.

7. The safe and energy-saving mixed ventilation device for industrial plants according to claim 3 is characterized by: An end plate (10) is provided on the insertion rod shaft (532), and the end plate (10) is located on the side of the end ring (5352) facing away from the separation and combination shaft (531).

8. The safe and energy-saving mixed ventilation device for industrial plants according to claim 1 is characterized by: A plurality of pneumatic blades (512) are arranged on the pneumatic shaft (511), the plurality of pneumatic blades (512) are distributed circumferentially relative to the axis of the pneumatic shaft (511), and the cross-section of the pneumatic blades (512) is hemispherical.

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