Pneumatic pump with adjustable air inlet angle

Abstract

The utility model discloses a pneumatic pump with an adjustable air inlet angle, which relates to the technical field of pneumatic pump lifting and comprises a main pump body, an air flow supply block, a nozzle and a suction nozzle device. The main pump body comprises a circulating channel of a conical inlet section, a middle channel section and a conical outlet section which are communicated in sequence; one end of the airflow supply block is provided with an extending conical part extending into the conical inlet, and an annular air inlet channel is formed between the outer side wall of the airflow supply block and the conical inlet. The airflow supply block is provided with a center channel, and a center air pipe is arranged in the center channel. An air supply cavity is formed in the airflow supply block and communicates with the annular air inlet channel and the center air pipe. The nozzle is arranged on the tail end pipe of the central gas pipe, at least one swinging blade is arranged at an outlet of the nozzle, and the swinging blade can rotate around a first axis and lock the position; the suction port device is provided with a through suction port channel, the suction port device is fixedly arranged at the end, away from the main pump body, of the airflow supply block, and the suction port channel communicates with the center channel. The dredging efficiency can be improved, the structure is simple, and the instantaneous lifting force is large.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic pump lifting technology, and in particular to a pneumatic pump with adjustable air intake angle. Background Technology

[0002] my country has numerous rivers, tributaries, and lakes, resulting in a total of 98,000 reservoirs, with Hunan province alone boasting 13,000. However, rapid industrial development has led to ecological damage, severe soil erosion, and significant siltation in rivers and lakes, severely weakening the flood control capacity of some water systems. In recent years, the annual siltation volume of major rivers in my country has reached 181 million cubic meters. The upper reaches of the Yangtze River produce 512 × 10⁸ tons of silt annually, which is transported to the middle reaches via Yichang. The main stream and tributaries of the middle reaches of the Yangtze River produce approximately 80 × 10⁸ tons of silt annually. Of these, about 124 × 10⁸ tons are deposited in the middle reaches's rivers and lakes, while 468 × 10⁸ tons are transported to the lower reaches via Datong, settling in river channels, the Yangtze River Delta, or flowing into the sea. Because agricultural production in my country relies heavily on reservoirs and lakes for irrigation, water management and silt removal have become key areas of focus. Developing dredging equipment is currently the best solution for water management.

[0003] Currently, my country uses various dredging methods, including grab bucket, bucket wheel, rake suction, and cutter suction. However, these methods suffer from drawbacks such as complex and bulky structures, high energy consumption, low efficiency, and limited applicability, making them unsuitable for the diverse types of reservoirs and rivers in my country. To address these issues, a new technology—pneumatic lifting technology (also known as a "pneumatic pump")—has gradually emerged. Pneumatic lifting pumps use air as the transport medium to draw in liquids or solids. They have no moving parts and offer advantages such as simple structure, reliable operation, and wide applicability, making them widely used in river dredging and other fields. Traditional pneumatic pumps simply introduce compressed air directly into the lower pump body through an air pipe, relying on liquid buoyancy to transport the slurry. Furthermore, the air intake angle of the pneumatic pump cannot be adjusted during the lifting process, leaving room for improvement in its slurry lifting efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a pneumatic pump with an adjustable air intake angle to solve the problems existing in the prior art, improve dredging efficiency, and provide a simple structure with a large instantaneous lifting force.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] This utility model provides a pneumatic pump with adjustable air intake angle, including a main pump body, an air supply block, a nozzle, and a suction port. The main pump body has a through flow channel, which includes a conical inlet section, a middle channel section, and a conical outlet section arranged sequentially. The small end of the conical inlet section is connected to one end of the middle channel section, and the small end of the conical outlet section is connected to the other end of the middle channel section. One end of the air supply block has an extended conical portion that extends into the conical inlet, and the outer wall of the extended conical portion forms an annular air intake channel with the inner wall of the conical inlet. The air supply block has a through central channel, which is connected to the conical inlet section. The air supply block is connected to the central channel, which contains a central air pipe. The axis of the end pipe of the central air pipe coincides with the axis of the central channel. The air supply block contains an air supply chamber, which is connected to both the annular air inlet and the central air pipe. The nozzle is located at the end opening of the end pipe of the central air pipe. At least one swing blade is located at the nozzle outlet. The swing blade can rotate around a first axis and lock its relative position after rotation. The first axis is perpendicular to the axis of the end pipe of the central air pipe. The suction device has a through suction channel. The suction device is fixedly located at the end of the air supply block away from the main pump body, and the suction channel is connected to the central channel.

[0007] Preferably, the nozzle includes a fixed connecting frame and at least one of the swing blades; the fixed connecting frame is detachably fixed at the end opening of the end tube of the central air tube; the swing blade corresponds to the end opening of the end tube of the central air tube, and screws are fixedly provided at both ends of the swing blade; mounting holes are provided on the fixed connecting frame at the positions corresponding to the screws; the screw at the end of the swing blade passes through the corresponding mounting hole and is threadedly connected to a locking nut.

[0008] Preferably, when the number of the oscillating blades is ≥2, the oscillating blades are arranged in parallel along a first direction, which is perpendicular to both the first axis and the axis of the end tube of the central trachea; and each oscillating blade is rotatably connected to a linkage, and each oscillating blade can rotate synchronously through the linkage.

[0009] Preferably, the airflow supply block includes an airflow block body and a lower pump body; the airflow block body has a coaxial airflow groove and a placement groove, one end of the airflow groove is connected to one end of the placement groove, and the inner diameter of the airflow groove is larger than the inner diameter of the placement groove; a connecting groove is provided at the opening of the airflow groove away from the placement groove, and the end of the main pump body with the conical inlet section is detachably fixedly inserted into the connecting groove; the lower pump body has a connector and an extension tube, the connector is fixedly disposed at one end of the extension tube, the connector has a through connecting channel, and the connecting channel is connected to the extension tube; the outer diameter of the extension tube near the connector is the same as the inner diameter of the placement groove; the connector is fixedly connected to the airflow block body; the end of the extension tube away from the connector forms the extended conical portion; the internal channel of the extension tube forms the central channel.

[0010] Preferably, the main pump body has a lift pipe detachably fixedly connected to one end of the conical outlet section.

[0011] Preferably, the suction channel is a conical channel, and the smaller end of the conical channel is connected to the central channel.

[0012] Preferably, the main pump body has a plurality of threaded holes on the outer side wall of one end of the conical inlet section, and the airflow block body has a plurality of through holes on the outer side wall of the connecting groove. The through holes correspond one-to-one with the threaded holes, and a connecting bolt passes through the through hole. The threaded end of the connecting bolt is threadedly connected to the threaded hole.

[0013] Preferably, the air supply block is provided with an air inlet connector that communicates with the air supply chamber, and the air inlet connector is used to communicate with the gas supply equipment.

[0014] Preferably, the cone angle of the suction channel is 12° to 16°.

[0015] Preferably, a first flange is fixedly provided at one end of the riser pipe, and a second flange is fixedly provided at one end of the main pump body having the conical outlet section, and the first flange and the second flange are fixedly connected by bolts.

[0016] This utility model achieves the following technical advantages over the prior art:

[0017] This utility model provides an adjustable air intake angle pneumatic pump. A swing blade is installed at the nozzle outlet. This blade can rotate around a first axis and lock its relative position after rotation. By adjusting the angle of the swing blade, the direction of the airflow from the nozzle can be changed, thus achieving adjustable air intake angle. This optimizes the initial airflow generation, creating a more stable fine bubble flow. Numerous small bubbles and water lift the particles upwards, forcing an increase in the contact area between phases and reducing slippage between phases. This achieves thorough mixing of the airflow and the slurry, thereby improving the mass transfer efficiency between the gas and the slurry. Furthermore, by changing the direction of the airflow from the nozzle, the pneumatic pump can be adjusted. The pulsating frequency of the flow field in the suction area at the bottom of the pump causes the drag force near the particles in the suction area to force large particles to move aerodynamically towards the suction device, thereby achieving efficient delivery. This allows the pneumatic pump to flexibly adjust the jet angle of the airflow according to different working requirements to achieve the best working effect. The conical inlet section, middle channel section, and conical outlet section of the main pump body form a Venturi effect, accelerating the airflow and reducing the negative pressure energy consumption at the rear end. The dual airflow synergy is adopted. The airflow of the annular air inlet diffuses along the conical inlet wall to form a low-pressure zone, which enhances the suction force of the suction device. The high-speed airflow of the central air pipe is ejected through the nozzle, optimizing the airflow and enhancing the delivery capacity of the device. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the overall structure of the air pump with adjustable air intake angle provided by this utility model;

[0020] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0021] Figure 3 A schematic diagram of the main pump body in the pneumatic pump with adjustable air intake angle provided by this utility model;

[0022] Figure 4 A schematic diagram of the lower pump body of the pneumatic pump with adjustable air intake angle provided by this utility model;

[0023] Figure 5 A schematic diagram of the inlet device in the pneumatic pump with adjustable air intake angle provided by this utility model.

[0024] In the picture:

[0025] 10-Main pump body; 11-Conical inlet section; 12-Middle channel section; 13-Conical outlet section; 14-Connecting threaded hole; 15-Second flange;

[0026] 20-Airflow block body; 21-Air supply chamber; 22-Central air pipe; 23-Annular air inlet; 24-Nozzle; 241-Oscillating blade; 242-Linking component; 243-Fixed connecting bracket; 244-Screw; 25-Through hole; 26-Air inlet connector; 27-Locking connecting nut;

[0027] 30 - Lower pump body; 31 - Connector; 32 - Extension pipe;

[0028] 40 - Suction nozzle;

[0029] 50 - Lifting pipe; 51 - First flange. Detailed Implementation

[0030] 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.

[0031] The purpose of this invention is to provide a pneumatic pump with an adjustable air intake angle to solve the problems existing in the prior art, improve dredging efficiency, and provide a simple structure with a large instantaneous lifting force.

[0032] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Example 1

[0034] This embodiment provides a pneumatic pump with an adjustable air intake angle, such as... Figures 1-5As shown, the system includes a main pump body 10, an air supply block, a nozzle 24, and a suction port 40. The main pump body 10 has a through flow channel, which includes a conical inlet section 11, a middle channel section 12, and a conical outlet section 13 arranged sequentially. The small end of the conical inlet section 11 is connected to one end of the middle channel section 12, and the small end of the conical outlet section 13 is connected to the other end of the middle channel section 12. One end of the air supply block has an extended conical portion that extends into the conical inlet, and an annular air intake 23 is formed between the outer wall of the extended conical portion and the inner wall of the conical inlet. The air supply block has a through central channel that is connected to the conical inlet section 11. A central air pipe 22 is provided inside the air supply block, and the axis of the end pipe of the central air pipe 22 coincides with the axis of the central channel. The air supply block has an air supply chamber 21 inside, which is connected to the annular air inlet 23 and the central air pipe 22. The nozzle 24 is provided on the end opening of the end pipe of the central air pipe 22, and at least one swing blade 241 is provided at the nozzle outlet. The swing blade 241 can rotate around a first axis and lock the relative position after rotation. The first axis is perpendicular to the axis of the end pipe of the central air pipe 22. The suction device 40 has a through suction channel. The suction device 40 is fixedly provided at the end of the air supply block away from the main pump body 10, and the suction channel is connected to the central channel.

[0035] A swing blade 241 is installed at the nozzle 24 outlet. The swing blade 241 can rotate around the first axis and lock its relative position after rotation. That is, by adjusting the angle of the swing blade 241, the direction of the airflow ejected from the nozzle 24 can be changed, thereby achieving adjustable air intake angle. This optimizes the initial airflow generation mode, forming a more stable fine bubble flow inside. A large number of small bubbles and water lift the particles upward, forcing an increase in the contact area between the phases and a decrease in the slip between the phases, achieving full mixing of airflow and slurry, thereby improving the mass transfer efficiency of gas and slurry. Furthermore, by changing the direction of the airflow ejected from the nozzle 24, the pulse of the flow field in the suction area at the bottom of the pneumatic pump can be adjusted. The dynamic frequency causes the drag force near the particles in the suction area to force large particles to move aerodynamically and flow towards the suction nozzle 40, thereby achieving efficient delivery. This allows the pneumatic pump to flexibly adjust the jet angle of the airflow according to different working requirements to achieve the best working effect. The conical inlet section 11, the middle channel section 12, and the conical outlet section 13 of the main pump body 10 form a Venturi effect, accelerating the airflow and reducing the negative pressure energy consumption at the rear end. The dual airflow synergy is adopted, and the airflow of the annular air inlet 23 diffuses along the conical inlet wall to form a low-pressure zone, which enhances the suction force of the suction nozzle 40. The high-speed airflow of the central air pipe 22 is ejected through the nozzle 24, optimizing the airflow and enhancing the delivery capacity of the device.

[0036] Specifically, the adjustable air intake angle pneumatic pump in this embodiment has no moving parts inside, making it less prone to clogging, greatly simplifying the equipment structure and reducing manufacturing costs. The gas is divided into two paths through the air supply chamber 21. One path is ejected through the annular air intake channel 23, which increases negative pressure and enhances momentum exchange, thereby increasing the drag force on the solid material. The other path is ejected through the nozzle 24. Since the nozzle 24 has an adjustable ejection angle, it increases the contact area and probability between the compressed gas and the two-phase flow, significantly increasing the instantaneous lifting force on the particles, which is extremely beneficial for the "starting" of sediments. The conveying speed and concentration of the slurry can be controlled by the airflow, which can also improve the selectivity of materials and make it highly controllable. It can adapt to more complex geological environments, has no requirements on the depth of the water or the lifting medium, and expands the application range of the device.

[0037] The following are the relevant settings for the main pump body 10:

[0038] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 As shown, the main pump body 10 has a conical outlet section 13 at one end which is detachably fixedly connected to a riser pipe 50. This detachable connection allows maintenance personnel to easily remove the riser pipe 50 from the main pump body 10 for inspection, repair, or replacement without having to disassemble the entire pneumatic pump on a large scale, thereby reducing maintenance costs and repair time and improving the operating efficiency of the equipment.

[0039] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 and Figure 3 As shown, a first flange 51 is fixedly installed at one end of the riser pipe 50, and a second flange 15 is fixedly installed at one end of the main pump body 10 with the conical outlet section 13. The first flange 51 and the second flange 15 are fixedly connected by bolts. Flange connection is a widely used mechanical connection method. By tightly connecting the first flange 51 and the second flange 15 together with bolts, sufficient connection strength can be provided to ensure that the riser pipe 50 and the main pump body 10 will not loosen or separate due to factors such as airflow pressure, material impact, or vibration when the pneumatic pump is working. This ensures the stability and sealing of the overall structure of the pneumatic pump and helps maintain the normal operation of the pneumatic pump.

[0040] Specifically, a sealing ring is provided between the first flange 51 and the second flange 15.

[0041] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 and Figure 3As shown, the main pump body 10 has multiple threaded holes 14 on the outer side wall of one end of the tapered inlet section 11, and the airflow block body 20 has multiple through holes 25 on the outer side wall of the connecting groove. The through holes 25 correspond one-to-one with the threaded holes 14, and connecting bolts are inserted into the through holes 25. The threaded end of the connecting bolt is threadedly connected to the threaded hole 14. The airflow block body 20 is connected to the main pump body 10 by the connecting bolts. The threads of the bolts are tightly engaged with the threaded holes 14 on the main pump body 10, which can provide reliable connection force. This ensures that during the operation of the pneumatic pump, the airflow block body 20 and the main pump body 10 will not loosen or separate due to the impact or vibration of the airflow, thus ensuring the stability of the pneumatic pump structure and helping to maintain its normal working condition.

[0042] Specifically, the inner walls of the conical inlet section 11 and the conical outlet section 13 are both conical surfaces, and the conical angle of the conical outlet section 13 is 12° to 16°, while the conical angle of the conical inlet section 11 is 8° to 12°; the inner wall of the middle channel section 12 is a cylindrical surface.

[0043] The following are the settings instructions for the airflow supply block:

[0044] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 and Figure 4 As shown, the airflow supply block includes an airflow block body 20 and a lower pump body 30. The airflow block body 20 has a coaxial airflow groove and a placement groove. One end of the airflow groove is connected to one end of the placement groove, and the inner diameter of the airflow groove is larger than the inner diameter of the placement groove. A connecting groove is provided at the opening of the airflow groove away from the placement groove. One end of the main pump body 10 with a conical inlet section 11 can be detachably fixed inside the connecting groove. The lower pump body 30 has a connector 31 and an extension pipe 32. The connector 31 is fixedly installed at one end of the extension pipe 32. The connector 31 has a through connecting channel that communicates with the extension pipe 32. The outer diameter of the extension pipe 32 near the connector 31 is the same as the inner diameter of the placement groove. The connector 31 is fixedly connected to the airflow block body 20. The end of the extension pipe 32 away from the connector 31 forms an extending conical part. The internal channel of the extension pipe 32 forms a central channel. The connecting groove on the airflow block body 20 facilitates the detachable and fixed insertion of one end of the main pump body 10 with the conical inlet section 11. This connection method makes the installation and disassembly of the main pump body 10 more convenient and quick, so as to better install and adjust the nozzle 24.

[0045] Specifically, the outer wall of the extension tube 32, the inner wall of the airflow groove, and the end face of the main pump body 10 together form the air supply chamber 21.

[0046] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1As shown, the air supply block is provided with an air inlet connector 26 that communicates with the air supply chamber 21. The air inlet connector 26 is used to communicate with a gas supply device (such as an air compressor, which is used to supply gas).

[0047] Specifically, the air inlet connector 26 is fixed to the air supply block (specifically the air supply block body 20) by a locking nut 27.

[0048] The following are the settings instructions for nozzle 24:

[0049] Specifically, the central trachea 22 is an L-shaped tube.

[0050] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 and Figure 2 As shown, the nozzle 24 includes a fixed connecting frame 243 and at least one swing blade 241. The fixed connecting frame 243 is detachably fixed at the end opening of the end tube of the central air pipe 22. The swing blade 241 corresponds to the end opening of the end tube of the central air pipe 22. Screws 244 are fixedly installed at both ends of the swing blade 241. Mounting holes are provided on the fixed connecting frame 243 at the positions corresponding to the screws 244. The screws 244 at the ends of the swing blade 241 pass through the corresponding mounting holes and are threadedly connected to a locking nut. The swing blade 241 is connected to the fixed connecting frame 243 through the screws 244 and the locking nut. This connection method allows the swing blade 241 to rotate around the axis of the screws 244, thereby realizing flexible adjustment of the air intake angle. By changing the angle of the swing blade 241, the direction of the airflow can be adjusted to adapt to different working requirements. For example, when conveying materials of different types or particle sizes, the interaction between the airflow and the material can be optimized to improve the conveying efficiency.

[0051] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 2 As shown, when the number of oscillating blades 241 is ≥2, each oscillating blade 241 is arranged in parallel along the first direction, which is perpendicular to the first axis and the axis of the end tube of the central air tube 22; and each oscillating blade 241 is rotatably connected to a linkage 242, and each oscillating blade 241 can rotate synchronously through the linkage 242.

[0052] Specifically, in addition to the aforementioned method of using the screws 244 at both ends of the swing blade 241 to engage with the locking nuts, the swing blade 241 can also be configured to rotate around the first axis and lock its relative position after rotation. This can be achieved by fixing a swing bracket on the shaft of the swing blade 241, with the swing bracket connected to the fixed connecting frame 243 via a telescopic joint. One end of the telescopic joint is rotatably connected to the fixed connecting frame 243, and the telescopic end of the telescopic joint is rotatably connected to the swing bracket. The telescopic movement of the telescopic joint drives the swing blade 241 to rotate around the first axis via the swing bracket. The relative position after rotation can be fixed by the extension of the telescopic end of the telescopic joint. This is existing technology and will not be elaborated further.

[0053] The following are the settings instructions for the suction nozzle 40:

[0054] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 and Figure 5 As shown, the suction channel is a conical channel, and the smaller end of the conical channel is connected to the central channel.

[0055] In the optional embodiments of this example, a more preferred method is to have a conical angle of 12° to 16° for the suction channel. This is to enable better contact with the sludge layer and increase the area for sludge extraction.

[0056] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A gas force pump with adjustable angle of intake, characterized in that: Includes the main pump body, air supply block, nozzle, and suction port; The main pump body has a through flow channel, which includes a conical inlet section, a middle channel section and a conical outlet section arranged in sequence; the small end of the conical inlet section is connected to one end of the middle channel section, and the small end of the conical outlet section is connected to the other end of the middle channel section. One end of the airflow supply block has an extended conical portion that extends into the conical inlet, and an annular air intake is formed between the outer wall of the extended conical portion and the inner wall of the conical inlet; the airflow supply block has a through central channel that communicates with the conical inlet section, and a central air pipe is provided in the central channel, with the axis of the end tube of the central air pipe coinciding with the axis of the central channel; the airflow supply block has an air supply chamber inside, which is connected to both the annular air intake and the central air pipe; The nozzle is disposed on the end opening of the end tube of the central air tube, and at least one swing blade is provided at the nozzle outlet. The swing blade can rotate around a first axis and lock its relative position after rotation. The first axis is perpendicular to the axis of the end tube of the central air tube. The suction nozzle has a through suction channel, and the suction nozzle is fixedly installed at one end of the airflow supply block away from the main pump body, and the suction channel is connected to the central channel.

2. The air intake angle adjustable air pump according to claim 1, characterized in that: The nozzle includes a fixed connecting frame and at least one of the swing blades; the fixed connecting frame is detachably fixed at the end opening of the end tube of the central air tube; The oscillating blade corresponds to the end opening of the end tube of the central air tube. Screws are fixedly installed at both ends of the oscillating blade. Mounting holes are opened on the fixed connecting frame at the positions corresponding to the screws. The screw at the end of the oscillating blade passes through the corresponding mounting hole and is threadedly connected to a locking nut.

3. The air intake angle adjustable air pump according to claim 1, wherein: When the number of the oscillating blades is ≥2, each of the oscillating blades is arranged in parallel along the first direction, and the first direction is perpendicular to the first axis and the axis of the end tube of the central trachea. Furthermore, each of the aforementioned oscillating blades is rotatably connected to a linkage, and each of the aforementioned oscillating blades can rotate synchronously through the linkage.

4. The air intake angle adjustable air pump according to claim 1, wherein: The air supply block includes an air supply block body and a lower pump body; The airflow block body has a coaxial airflow groove and a placement groove. One end of the airflow groove is connected to one end of the placement groove, and the inner diameter of the airflow groove is larger than the inner diameter of the placement groove. A connecting groove is provided at the opening of the end of the airflow groove away from the placement groove. The end of the main pump body with the conical inlet section can be detachably fixed and inserted into the connecting groove. The lower pump body has a connector and an extension tube. The connector is fixedly disposed at one end of the extension tube. The connector has a through connection channel that communicates with the extension tube. The outer diameter of the extension tube near the connector is the same as the inner diameter of the mounting groove. The connector is fixedly connected to the airflow block body. The end of the extension tube away from the connector forms the extension cone. The internal channel of the extension tube forms the central channel.

5. The air intake angle adjustable air pump according to claim 1, wherein: The main pump body has a lift pipe detachably fixedly connected to one end of the conical outlet section.

6. The air intake angle adjustable air pump according to claim 1, wherein: The suction channel is a conical channel, and the smaller end of the conical channel is connected to the central channel.

7. The air intake angle adjustable air pump according to claim 4, wherein: The main pump body has a plurality of threaded holes on the outer side wall of the tapered inlet section, and the airflow block body has a plurality of through holes on the outer side wall of the connecting groove. The through holes correspond one-to-one with the threaded holes, and a connecting bolt passes through the through hole. The threaded end of the connecting bolt is threadedly connected to the threaded hole.

8. The air intake angle adjustable air pump according to claim 1, wherein: The air supply block is provided with an air inlet connector that communicates with the air supply chamber, and the air inlet connector is used to communicate with the gas supply equipment.

9. The air intake angle adjustable air pump according to claim 6, wherein: The conical angle of the suction channel is 12° to 16°.

10. The air intake angle adjustable air pump according to claim 5, wherein: A first flange is fixedly installed at one end of the riser pipe, and a second flange is fixedly installed at one end of the main pump body having the conical outlet section. The first flange and the second flange are fixedly connected by bolts.

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