An angle-adjustable ventilation and exhaust device for pulp processing

Abstract

This utility model discloses an angle-adjustable ventilation and exhaust device for pulp processing, including a housing. Inside the housing are a first pipe and an exhaust pipe. The inner wall of the first pipe is permeated with longitudinally evenly distributed connecting pipes. The outer surfaces of the connecting pipes are slidably connected to extraction pipes. The device also includes an adjustment mechanism. The adjustment mechanism includes a synchronizing seat, a connecting seat, a rotating ring, an electro-hydraulic actuator, a telescopic rod, and a torque adjustment assembly. The synchronizing seat is vertically slidably connected between the outer arc surfaces of the extraction pipes. A mounting seat is provided on the upper right wall of the housing. This angle-adjustable ventilation and exhaust device for pulp processing, through a transmission element, can adjust the angle and exhaust distance of the ventilation and exhaust parts of the device according to the pulp processing position, allowing the exhaust port to be close to the pulp processing position, thereby improving the device's efficiency in discharging waste gas from the pulp processing position and reducing the probability of waste gas accumulation.

Description

Technical Field

[0001] This utility model relates to the field of pulp processing technology, specifically to a ventilation and exhaust device for pulp processing with adjustable angle. Background Technology

[0002] Pulp is a fibrous material made from plant fibers through various processing methods. It is a major raw material in the papermaking industry. During pulp processing, exhaust systems are used to remove waste gases generated during the process. In the prior art, patent CN 213132399 U discloses a ventilation device for a papermaking workshop, including a base, columns, and a top plate. Multiple columns are fixedly connected to the base. A housing is installed on one side of each column, and a filter screen is embedded in one side of the housing. A top plate is installed above the columns, and a control panel is installed on the top plate. A vacuum cleaner is located on one side of the control panel, and an L-shaped suction pipe is inserted inside the vacuum cleaner. A dust collection box is embedded in one end of the suction pipe, and a dust collection pipe is embedded below the suction pipe. This device allows for ventilation during overall operation, facilitating internal filtration. To prevent external dust from easily entering the workshop and increasing internal dust levels, and to improve the workshop environment, this device effectively absorbs a large amount of dust generated inside the workshop during ventilation, preventing severe internal pollution. While the device uses a dust hood to exhaust waste gas from the pulp processing process, the fixed position of the dust hood and limited suction power prevent adjustment of the ventilation and exhaust angle according to the location of the pulp processing area. This results in poor exhaust performance of waste gas generated in the pulp processing area and potential waste gas accumulation. Therefore, we propose an adjustable-angle ventilation and exhaust device for pulp processing. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide an angle-adjustable ventilation and exhaust device for pulp processing. This device, through a transmission element, can adjust the angle and exhaust distance of the ventilation and exhaust parts of the device according to the pulp processing position, so that the exhaust port can be close to the pulp processing position, thereby improving the device's exhaust efficiency of waste gas from the pulp processing position and reducing the probability of waste gas accumulation. This can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an angle-adjustable ventilation and exhaust device for pulp processing, comprising a housing, wherein a pipe and an exhaust pipe are respectively installed inside the housing, a connecting pipe evenly distributed longitudinally is provided through the inner wall of the pipe, and an exhaust pipe is slidably connected to the outer side of the connecting pipe, and an adjustment mechanism is also included. Adjustment mechanism: It includes a synchronizing seat, a connecting seat, a rotating ring, an electro-hydraulic actuator, a telescopic rod, and a torque adjustment assembly. The synchronizing seat is vertically slidably connected to the outer arc surface of the exhaust pipe. An mounting seat is provided at the upper right wall of the outer shell. The mounting seat and the synchronizing seat are provided with longitudinally evenly distributed connecting seats on their opposite inner surfaces. The connecting seats are all rotatably connected to rotating rings through rotating shafts. An electro-hydraulic actuator is provided between two adjacent rotating rings located at the longitudinal center of the outer shell. Telescopic rods are provided between the remaining two adjacent rotating rings. A torque adjustment assembly is provided between the synchronizing seat and the exhaust pipe. This device, through transmission elements, can adjust the angle and exhaust distance of the ventilation and exhaust parts of the device according to the pulp processing position, so that the exhaust port can be close to the pulp processing position, thereby improving the device's exhaust efficiency of the waste gas from the pulp processing position and reducing the probability of waste gas accumulation.

[0005] Furthermore, it also includes a microcontroller, which is located outside the housing. The input terminal of the microcontroller is electrically connected to an external power supply, and the output terminal of the microcontroller is electrically connected to the input terminal of the electro-hydraulic actuator, which facilitates the control of the electrical components inside the device.

[0006] Furthermore, the left side of the mounting base is provided with longitudinally symmetrically distributed support seats. The left ends of the support seats are rotatably connected to the outside of the first pipe through a bearing. The top wall of the outer shell is provided with a second pipe. The lower end of the second pipe is fixedly connected to the rear end of the first pipe through a rotary joint. The left wall of the outer shell is provided with a third pipe. The lower end of the third pipe is connected to the air outlet pipe. The outside of the air outlet pipe is fixedly connected to the left wall of the outer shell through longitudinally symmetrically distributed fixing seats. The upper ends of the third pipe and the second pipe are connected in series with air filters to perform activated carbon adsorption filtration on the gas passing through the pipes in the ventilation and exhaust device for pulp processing.

[0007] Furthermore, two centrifugal fans are provided on the upper side of the outer casing. The input end of each centrifugal fan is electrically connected to the output end of the microcontroller. The air inlet of the right centrifugal fan is connected to the upper end of the second pipe, and the air outlet of the left centrifugal fan is connected to the upper end of the third pipe, so as to provide power for the gas flow during the ventilation and exhaust process in the ventilation and exhaust device for pulp processing.

[0008] Furthermore, the adjustment mechanism also includes an angle sensor, which is located on the front side of the front support base. The detection end of the angle sensor is fixedly connected to the outside of the first pipe. The angle sensor is bidirectionally electrically connected to the microcontroller to detect and upload the rotation angle of the exhaust pipe in the ventilation and exhaust device for pulp processing around the center of the first pipe.

[0009] Furthermore, the torque adjustment assembly includes a fixed plate, an electro-hydraulic actuator II, and a guide rod. The fixed plate is disposed between the air extraction pipes. An electro-hydraulic actuator II is provided on the lower side of the synchronization seat. The telescopic end of the electro-hydraulic actuator II is fixedly connected to the lower side of the fixed plate. The input end of the electro-hydraulic actuator II is electrically connected to the input end of the microcontroller. A guide rod is provided on the lower side of the fixed plate. The lower end of the guide rod is slidably connected to a circular hole opened on the synchronization seat to adjust the distance between the air extraction pipe in the ventilation and exhaust device for pulp processing and the pulp processing position.

[0010] Furthermore, the torque adjustment component also includes a laser sensor, which is located on the upper side of the synchronization seat. The laser sensor is bidirectionally electrically connected to the microcontroller and is installed in conjunction with the fixing plate to measure and upload the sliding distance of the exhaust pipe in the ventilation and exhaust device for pulp processing relative to the connecting pipe.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This adjustable-angle ventilation and exhaust device for pulp processing has the following advantages: When using a ventilation and exhaust device for pulp processing, the angle of the ventilation and exhaust section of the device can be adjusted according to the pulp processing position by means of a rotating ring, an electro-hydraulic actuator, and an angle sensor. This allows the exhaust pipe inlet to face the pulp processing position. By using a torque adjustment component, the exhaust distance between the ventilation and exhaust section of the device and the pulp processing position can be shortened, allowing the exhaust port to face the pulp processing position at a closer distance. This improves the device's efficiency in discharging exhaust gas from the pulp processing position and reduces the probability of exhaust gas accumulation. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is an enlarged structural diagram of point A in this utility model.

[0013] In the diagram: 1. Housing, 2. Microcontroller, 3. Mounting base, 4. Support base, 5. Pipe 1, 6. Pipe 2, 7. Connecting pipe, 8. Air extraction pipe, 9. Adjustment mechanism, 91. Synchronization seat, 92. Connecting seat, 93. Rotary ring, 94. Electro-hydraulic actuator 1, 95. Telescopic rod, 96. Angle sensor, 97. Torque adjustment assembly, 971. Fixing plate, 972. Electro-hydraulic actuator 2, 973. Guide rod, 974. Laser sensor, 10. Air outlet pipe, 11. Pipe 3, 12. Air filter, 13. Centrifugal fan. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-3This embodiment provides a technical solution: an angle-adjustable ventilation and exhaust device for pulp processing, including a housing 1. Inside the housing 1, a pipe 5 and an exhaust pipe 10 are respectively installed. The inner wall of the pipe 5 is permeated with longitudinally evenly distributed connecting pipes 7. The outer surfaces of the connecting pipes 7 are slidably connected to exhaust pipes 8. The device also includes a microcontroller 2, located outside the housing 1. The input terminal of the microcontroller 2 is electrically connected to an external power source. On the left side of the mounting base 3, longitudinally symmetrically distributed support seats 4 are provided. The left ends of the support seats 4 are rotatably connected to the outer side of the pipe 5 via bearings. A second pipe 6 permeates the top wall of the housing 1. The lower end of the second pipe 6 is connected via a rotating... The connector is fixedly connected to the rear end of pipe 5. Pipe 3 11 is installed through the left wall of the outer casing 1. The lower end of pipe 3 11 is connected to the air outlet pipe 10. The outer side of the air outlet pipe 10 is fixedly connected to the left wall of the outer casing 1 through longitudinally symmetrically distributed fixing seats. Air filters 12 are connected in series at the upper ends of pipe 3 11 and pipe 2 6. Two centrifugal fans 13 are installed on the upper side of the outer casing 1. The input ends of centrifugal fans 13 are electrically connected to the output ends of microcontroller 2. The air inlet 1 of the right centrifugal fan 13 is connected to the upper end of pipe 2 6, and the air outlet 2 of the left centrifugal fan 13 is connected to the upper end of pipe 3 11. The outer casing 1 is connected to the pipe 5 through the mounting holes at the bottom with bolts. The device is installed outside the pulp processing area, so that paper processing is located inside the outer casing 1. The outlet of the right-side centrifugal fan 13 is connected to the outside of the pulp processing workshop via an external duct. The inlet of the left-side centrifugal fan 13 is connected to the outside of the pulp processing workshop via an external duct. During the exhaust process of pulp processing, the microcontroller 2 starts both sets of centrifugal fans 13. The negative pressure generated by the operation of the right-side centrifugal fan 13 forces air from inside the outer casing 1 into the right-side centrifugal fan 13 through the extraction pipe 8, connecting pipe 7, pipe 1 5, and pipe 2 6, and then through the external duct. The air is discharged to the outside of the pulp processing workshop. The centrifugal fan 13 on the left generates negative pressure during operation, which allows clean air from outside the pulp processing workshop to enter the outer shell 1 through the externally installed pipe 2, pipe 3 11 and air outlet pipe 10, thereby realizing the ventilation and exhaust operation of the pulp processing. The gas passing through pipe 3 11 and pipe 2 6 passes through the corresponding air filter 12 for gas filtration. The air filter 12 is an activated carbon air filter, which relies on the micropores of the activated carbon filter element to physically adsorb impurities and pollutants in the gas. The air filters 12 are all fixed to the corresponding pipes through connecting flanges, which facilitates the replacement of internal filter elements later. It also includes an adjustment mechanism 9. Adjustment mechanism 9 includes a synchronizing seat 91, a connecting seat 92, a rotating ring 93, an electro-hydraulic actuator 94, a telescopic rod 95, and a torque adjustment assembly 97. The synchronizing seat 91 is vertically slidably connected to the outer arc surface of the suction pipe 8. A mounting seat 3 is provided at the upper right wall of the outer casing 1. The mounting seat 3 and the synchronizing seat 91 are provided with longitudinally evenly distributed connecting seats 92 on their opposite inner surfaces. The connecting seats 92 are rotatably connected to rotating rings 93 via rotating shafts. An electro-hydraulic actuator 94 is provided between two horizontally adjacent rotating rings 93 located at the longitudinal center of the outer casing 1. A telescopic rod 95 is provided between the remaining horizontally adjacent rotating rings 93. A torque adjustment assembly 97 is provided between the synchronizing seat 91 and the suction pipe 8. The output end of the microcontroller 2 is electrically connected to the input end of the electro-hydraulic actuator 94. The structure 9 also includes an angle sensor 96, which is located on the front side of the support base 4. The detection end of the angle sensor 96 is fixedly connected to the outside of the pipe 5. The angle sensor 96 is bidirectionally electrically connected to the microcontroller 2. The torque adjustment assembly 97 includes a fixing plate 971, an electro-hydraulic actuator 972, and a guide rod 973. The fixing plate 971 is located between the air extraction pipes 8. The lower side of the synchronization base 91 is provided with the electro-hydraulic actuator 972. The telescopic end of the electro-hydraulic actuator 972 is fixedly connected to the lower side of the fixing plate 971. The input end of the electro-hydraulic actuator 972 is electrically connected to the input end of the microcontroller 2. The lower side of the fixing plate 971 is provided with the guide rod 973. The lower end of the guide rod 973 is slidably connected to a circular hole on the synchronization base 91. The torque adjustment assembly 97 also includes Laser sensor 974 is located on the upper side of synchronous base 91. Laser sensor 974 is bidirectionally electrically connected to microcontroller 2. Laser sensor 974 is installed in conjunction with fixing plate 971. When adjusting the angle of ventilation and exhaust in pulp processing, microcontroller 2 activates electro-hydraulic actuator 94, extending its telescopic end. This causes the corresponding rotating ring 93 to rotate around its corresponding axis. The rotating ring 93, through torque adjustment component 97, causes the exhaust pipe 8 to drive the corresponding connecting pipe 7 to rotate synchronously around the center of pipe 5. Pipe 5 rotates synchronously around its own center along with the connecting pipe 7. During this process, the remaining rotating rings 93 adaptively rotate around their corresponding axes, and the telescopic end of telescopic rod 95 adaptively extends and retracts. The sliding engagement between the fixed end and the telescopic end of the electro-hydraulic actuator 94 bears the radial pressure applied by components such as the synchronizing seat 91, thus preventing damage to the telescopic end of the electro-hydraulic actuator 94. Simultaneously, the microcontroller 2 activates the angle sensor 96, which employs a high-performance integrated magnetic sensing element. Utilizing the non-contact nature of magnetic signal sensing, the angle of rotation of the pipe 5 around its core is measured, and the measurement result is transmitted to the microcontroller 2 as an electrical signal. Based on the measured result, the microcontroller 2 adjusts the stroke of the telescopic end of the electro-hydraulic actuator 94, thereby adjusting the angle of ventilation and exhaust during pulp processing. Through this high-angle adjustment, the exhaust ports of the extraction pipe 8 are precisely oriented towards the pulp processing position.This allows for the rapid discharge of waste gas generated during pulp processing. Simultaneously, the microcontroller 2 activates the electro-hydraulic actuator 972, extending its telescopic end. This causes the fixed plate 971 to drive the extraction pipe 8 to slide synchronously down the outer side of the corresponding connecting pipe 7 (a rubber ring can be installed on the inner wall of the extraction pipe 8 to seal the sliding gap between the extraction pipe 8 and the outer side of the connecting pipe 7). By shortening the distance between the opening of the extraction pipe 8 and the location where waste gas is generated during pulp processing, the device's ability to discharge waste gas generated during pulp processing is further improved. During this process, the guide rod 973 slides adaptively with the fixed plate 971 and the circular hole 1. Through their sliding contact, the guide rod 973 bears the radial pressure applied by the fixed plate 971 and its connecting elements to the telescopic end of the electro-hydraulic actuator 972, preventing the electro-hydraulic actuator 972 from being damaged. When the telescopic end of the device is damaged, the microcontroller 2 activates the laser sensor 974. The laser sensor 974 emits a light signal that illuminates the lower side of the fixed plate 971 and reflects back to its initial position. Based on the propagation time and speed of the light signal, the sliding distance of the suction pipe 8 relative to the connecting pipe 7 is obtained. The measured result is then transmitted to the microcontroller 2 as an electrical signal. The microcontroller 2 controls the extension and retraction stroke of the electro-hydraulic actuator 972 based on this result, thereby precisely controlling the sliding distance of the suction pipe 8 relative to the outer side of the connecting pipe 7. This device, through transmission elements, can adjust the angle and exhaust distance of the ventilation and exhaust parts of the device according to the pulp processing position, so that the exhaust port can be close to the pulp processing position, thereby improving the efficiency of the device in discharging waste gas from the pulp processing position and reducing the probability of waste gas accumulation.

[0016] The working principle of the adjustable-angle ventilation and exhaust device for pulp processing provided by this utility model is as follows: The device is installed on the outside of the pulp processing position through the mounting holes at the bottom of the outer shell 1 using bolts, so that the pulp processing is located inside the outer shell 1. Then, the air outlet 1 of the right centrifugal fan 13 is connected to the outside of the pulp processing workshop through an external supporting pipe 1, and the air inlet 2 of the left centrifugal fan 13 is connected to the outside of the pulp processing workshop through an external supporting pipe 2. When performing exhaust operations during the pulp processing, the microcontroller 2 starts both sets of centrifugal fans 13. The negative pressure generated by the operation of the right centrifugal fan 13 causes the air inside the outer shell 1 to enter the right centrifugal fan 13 through the exhaust pipe 8, connecting pipe 7, pipe 1 5, and pipe 2 6. The air is discharged from the machine 13 through an external duct to the outside of the pulp processing workshop. The centrifugal fan 13 on the left side generates negative pressure during operation, causing clean air from outside the pulp processing workshop to enter the outer casing 1 through an external duct 2, duct 3 11, and exhaust pipe 10, thus realizing the ventilation and exhaust operation of the pulp processing. The gas passing through duct 3 11 and duct 2 6 passes through the corresponding air filter 12 for gas filtration. The air filter 12 is an activated carbon air filter, which relies on the micropores of the activated carbon filter element to physically adsorb impurities and pollutants in the gas. The air filters 12 are all fixed to the corresponding pipes through connecting flanges, which facilitates the replacement of internal filter elements later. When adjusting the angle of ventilation and exhaust for pulp processing, the microcontroller 2 starts the electro-hydraulic... Push rod 94 extends its telescopic end, thereby driving the corresponding rotating ring 93 to rotate around the corresponding rotating shaft. This rotating ring 93, through the torque adjustment component 97, causes the suction pipe 8 to drive the corresponding connecting pipe 7 to rotate synchronously around the center of pipe 5. Pipe 5 rotates synchronously around its own center along with the connecting pipe 7. During this process, the remaining rotating rings 93 all adaptively rotate around their corresponding rotating shafts. The telescopic end of the telescopic rod 95 adaptively extends and retracts. Through the sliding engagement between the telescopic end and the fixed end of the telescopic rod 95, the radial pressure applied by the synchronous seat 91 and other components on the telescopic end of the electro-hydraulic push rod 94 is supported, thus preventing damage to the telescopic end of the electro-hydraulic push rod 94. Simultaneously, during this process, the microcontroller 2 activates the angle sensor 96, and the angle sensor... Device 96 employs a high-performance integrated magnetic sensing element, utilizing the non-contact nature of magnetic signal sensing to measure the rotation angle of pipe 5 around its core. The measurement result is transmitted to microcontroller 2 as an electrical signal. Microcontroller 2 adjusts the travel of the telescopic end of electro-hydraulic actuator 94 based on the measurement result, thereby adjusting the angle of ventilation and exhaust during pulp processing. Through high-angle adjustment, the exhaust port of the extraction pipe 8 is precisely oriented towards the pulp processing position, allowing the waste gas generated during pulp processing to be quickly discharged. Simultaneously, during this process, microcontroller 2 activates electro-hydraulic actuator 972, extending its telescopic end, causing the fixing plate 971 to drive the extraction pipe 8 to slide synchronously down the outer side of the corresponding connecting pipe 7 (a rubber ring can be installed on the inner wall of the extraction pipe 8).This seals the sliding gap between the outside of the extraction pipe 8 and the connecting pipe 7. By shortening the distance between the opening of the extraction pipe 8 and the part where waste gas is generated during pulp processing, the device further improves the discharge effect of waste gas generated during pulp processing. During this process, the guide rod 973 slides adaptively with the fixed plate 971 and the first circular hole. Through the sliding contact between the two, the radial pressure applied by the fixed plate 971 and its connecting elements to the extension end of the electro-hydraulic actuator 972 is borne, preventing damage to the extension end of the electro-hydraulic actuator 972. At the same time, the microcontroller 2 activates the laser sensor 974. The laser sensor 974 emits a light signal that irradiates the lower side of the fixed plate 971 and reflects back to the initial position. Based on the propagation time and speed of the light signal, the sliding distance of the extraction pipe 8 relative to the connecting pipe 7 is obtained. The measured result is then transmitted to the microcontroller 2 as an electrical signal. The microcontroller 2 controls the extension stroke of the electro-hydraulic actuator 972 based on this result, thereby precisely controlling the sliding distance of the extraction pipe 8 relative to the outside of the connecting pipe 7.

[0017] It is worth noting that the microcontroller 2 disclosed in the above embodiments can be NY8A050D, the electro-hydraulic actuator 94 and the electro-hydraulic actuator 972 can both be DYZW integral straight micro electro-hydraulic actuators, the angle sensor 96 can be an HSM22M multi-turn non-contact magnetic potentiometer, the laser sensor 974 can be a CD33-30N-422, and the centrifugal fan 13 can be a 9-26A-11kw high-pressure centrifugal fan. The microcontroller 2 controls the operation of the electro-hydraulic actuator 94, the angle sensor 96, the laser sensor 974, the electro-hydraulic actuator 972 and the centrifugal fan 13 using methods commonly used in the prior art.

[0018] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An angle-adjustable ventilation and exhaust device for pulp processing, comprising a housing (1), wherein a pipe (5) and an exhaust pipe (10) are respectively installed inside the housing (1), and a longitudinally uniformly distributed connecting pipe (7) is provided through the inner wall of the pipe (5), and an exhaust pipe (8) is slidably connected to the outer side of the connecting pipe (7), characterized in that: It also includes a regulating mechanism (9); Adjustment mechanism (9): It includes a synchronizing seat (91), a connecting seat (92), a rotating ring (93), an electro-hydraulic actuator (94), a telescopic rod (95), and a torque adjustment assembly (97). The synchronizing seat (91) is vertically slidably connected to the outer arc surface of the suction pipe (8). The upper right wall of the outer shell (1) is provided with a mounting seat (3). The mounting seat (3) and the synchronizing seat (91) are provided with longitudinally evenly distributed connecting seats (92). The connecting seats (92) are all rotatably connected to rotating rings (93) through rotating shafts. An electro-hydraulic actuator (94) is provided between two horizontally adjacent rotating rings (93) located at the longitudinal center of the outer shell (1). The remaining horizontally adjacent rotating rings (93) are provided with telescopic rods (95). A torque adjustment assembly (97) is provided between the synchronizing seat (91) and the suction pipe (8).

2. The adjustable-angle ventilation and exhaust device for pulp processing according to claim 1, characterized in that: It also includes a microcontroller (2), which is located outside the housing (1). The input terminal of the microcontroller (2) is electrically connected to an external power supply, and the output terminal of the microcontroller (2) is electrically connected to the input terminal of the electro-hydraulic actuator (94).

3. The adjustable-angle ventilation and exhaust device for pulp processing according to claim 2, characterized in that: The mounting base (3) has longitudinally symmetrically distributed support bases (4) on its left side. The left end of each support base (4) is rotatably connected to the outside of the first pipe (5) through a bearing. The top wall of the outer shell (1) is provided with a second pipe (6). The lower end of the second pipe (6) is fixedly connected to the rear end of the first pipe (5) through a rotary joint. The left wall of the outer shell (1) is provided with a third pipe (11). The lower end of the third pipe (11) is connected to the air outlet pipe (10). The outside of the air outlet pipe (10) is fixedly connected to the left wall of the outer shell (1) through longitudinally symmetrically distributed fixing bases. The upper ends of the third pipe (11) and the second pipe (6) are connected in series with air filters (12).

4. The adjustable-angle ventilation and exhaust device for pulp processing according to claim 3, characterized in that: The upper side of the outer shell (1) is provided with two centrifugal fans (13). The input end of the centrifugal fans (13) is electrically connected to the output end of the microcontroller (2). The air inlet of the centrifugal fan (13) on the right is connected to the upper end of the pipe (6), and the air outlet of the centrifugal fan (13) on the left is connected to the upper end of the pipe (11).

5. The adjustable-angle ventilation and exhaust device for pulp processing according to claim 3, characterized in that: The adjustment mechanism (9) also includes an angle sensor (96), which is located on the front side of the support base (4). The detection end of the angle sensor (96) is fixedly connected to the outside of the pipe (5), and the angle sensor (96) is bidirectionally electrically connected to the microcontroller (2).

6. The adjustable-angle ventilation and exhaust device for pulp processing according to claim 2, characterized in that: The torque adjustment assembly (97) includes a fixed plate (971), an electro-hydraulic actuator (972), and a guide rod (973). The fixed plate (971) is located between the air extraction pipes (8). The lower side of the synchronizing seat (91) is provided with an electro-hydraulic actuator (972). The telescopic end of the electro-hydraulic actuator (972) is fixedly connected to the lower side of the fixed plate (971). The input end of the electro-hydraulic actuator (972) is electrically connected to the input end of the microcontroller (2). The lower side of the fixed plate (971) is provided with a guide rod (973). The lower end of the guide rod (973) is slidably connected to a circular hole opened on the synchronizing seat (91).

7. The adjustable-angle ventilation and exhaust device for pulp processing according to claim 6, characterized in that: The torque adjustment assembly (97) also includes a laser sensor (974), which is located on the upper side of the synchronization seat (91). The laser sensor (974) is bidirectionally electrically connected to the microcontroller (2), and the laser sensor (974) is installed in conjunction with the fixing plate (971).

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