Jet flow and fountain dual-purpose aerator

Abstract

A jet flow and fountain dual-purpose oxygen increasing machine comprises a floating box and an oxygen increasing device arranged on the floating box, the oxygen increasing device comprises a motor, a pump shell and an impeller, an air / water inlet chamber and an impeller chamber are arranged in the pump shell, the air / water inlet chamber and the impeller chamber are directly communicated through a through hole, the impeller comprises a hub, a wheel shaft and blades, an axial flow hole is formed between the wheel shaft and the hub, and the axial flow hole is communicated with the impeller. The end, right facing the air / water inlet chamber, of the hub sinks and is located in a counter bore of the impeller chamber. The air / water inlet chamber, the through hole and the axial flow hole jointly form a fluid channel; the end, right facing the air / water inlet chamber, of the axial flow hole is an outwards-expanded horn mouth. The modes of the jet aerator and the fountain aerator can be freely switched by mounting or dismounting the air inlet pipe and adjusting the position and the mounting angle of the aeration device relative to the buoyancy tank; the straight-through type fluid channel is adopted, air inlet is free of loss, the air inlet amount is larger, and the air inlet speed is higher; an inlet of the air inlet pipe and an inlet of the axial flow hole are both of a horn mouth structure, and the air inlet amount in unit time is further improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of oxygenator, especially relates to a dual-purpose oxygenator of jet fountain. BACKGROUND

[0002] If there is not enough oxygen in the breeding pond in aquaculture industry, aquatic species is easy to be ill, even death. And because of the breeding feeding and the excrement of aquatic species, the water in the breeding pond is easy to appear low dissolved oxygen. In order to increase the dissolved oxygen in the water of the breeding pond, the existing breeding farm usually adopts the impeller type oxygenator to oxygenate the pond water, which fixes the impeller type oxygenator on the shelf between two small boats, places the impeller under the water surface to stir up vortex and mix air into water. In this way, the small boat is continuously moved on the water surface to increase the dissolved oxygen of the pond water. However, the existing oxygenation mode that uses the impeller to stir up vortex in water to mix air into water with vortex naturally, the center of vortex has no air, so the oxygenation effect is poor.

[0003] Therefore, the jet type oxygenator and the fountain type oxygenator appear in the market.

[0004] The jet flow type oxygenation machine is a light multi-functional oxygenation system designed for water quality improvement of rivers and lakes. When the impeller rotates at high speed, it generates strong axial thrust and radial stirring force, and cooperates with the air inlet pipe to artificially oxygenate the water body in anoxic (or anaerobic) state, which can improve the dissolved oxygen concentration in the water body and help the river and lake to restore to the normal aquatic ecosystem. However, the existing jet flow type oxygenation machine has the following defects: 1. The function is relatively single, cannot realize multi-purpose, and cannot meet the diversified needs of customers; 2. The rotating shaft of the motor is a hollow shaft, the impeller is sleeved and fixed on the rotating shaft, the air inlet pipe is connected to the air inlet cavity of the pump body, and the air inlet cavity is communicated with the hollow shaft. In this way, the air from the outside enters the hollow shaft through the air inlet pipe and the air inlet cavity, and is pushed out from the impeller position with the high-speed rotation of the impeller. The design of the hollow shaft has the problems of small air intake, large air resistance and low efficiency, as the air passes through multiple links to reach the impeller position. In addition, the impeller adopts an exposed structure and is located outside the air inlet cavity, so the overall volume is larger. Moreover, the motor shaft penetrates through the air inlet cavity to the outside of the air inlet cavity. In order to prevent air leakage in the air inlet cavity, a skeleton oil seal is installed between the motor shaft and the air inlet cavity, which increases the manufacturing cost. Moreover, the skeleton oil seal will be worn out during long-term use, which leads to air leakage, smaller air intake, and poor stability of the motor shaft. The above design structure makes the length of the motor shaft longer than that of the conventional one, which further leads to poor stability. 3. The fixation between the motor shaft and the impeller adopts a pin, which makes the concentricity of the motor shaft and the impeller poor. 4. The blades of the impeller belong to a fan-shaped structure, which has small contact area with water and limited water pushing capacity. 5. The small size of the air inlet end of the air inlet pipe and the limited internal diameter of the hollow shaft further exacerbate the insufficient air intake. 6. The cable of the motor adopts a side outlet structure, which is prone to winding and causes installation inconvenience, bumping and wear. 7. The net cover matched with the impeller position on the pump body is an independent split structure, which is prone to deformation during transportation. 8. The connection and fixation of the motor and the bracket of the float box are relatively complicated and have low assembly efficiency.

[0005] The defects of the existing fountain type oxygenation machine are as follows: 1. The function is relatively single, cannot realize multi-purpose, and cannot meet the diversified needs of customers; 2. The water outlet flange is fixed on the pump body and connected by multiple screws, the concentricity of the impeller in the pump body and the water outlet flange is relatively low, which leads to poor water outlet effect and high probability of impeller and pump body wall jamming, resulting in short service life; 3. A net cover is additionally installed outside the water inlet position of the pump body, which is complicated to install and prone to cause defects.

[0006] Therefore, how to improve the multi-purpose function of the jet flow type oxygenation machine / fountain type oxygenation machine and how to improve the oxygenation efficiency and use efficiency are technical problems that need to be solved in the industry. SUMMARY

[0007] The utility model solves the prior art problem and provides a jet fountain dual-purpose oxygenation machine, which optimizes the prior design scheme and makes up for various defects.

[0008] The utility model adopts the technical scheme that:

[0009] The utility model discloses a jet fountain dual-purpose oxygenation machine, including the float chamber and the oxygenation device of setting on the float chamber, the oxygenation device includes motor, pump shell and impeller, is equipped with the "air / water" chamber and impeller chamber in the pump shell, the "air / water" chamber and impeller chamber are directly through through -hole, the impeller is in the impeller chamber, and the impeller includes hub, axle and blade, the axle is in the hub and the axle and hub are concentric and set up, to form the axial flow hole between the axle and hub, the hub is opposite the "air / water" chamber one end sunken in the counterbore of impeller chamber, and the axial flow hole is coaxial and opposite through -hole;The axle of motor is connected in the axle;The "air / water" chamber, through -hole, axial flow hole form fluid passage together;The axial flow hole is opposite the "air / water" chamber one end and is the horn mouth of outward expansion.

[0010] The "air / water" chamber is directly connected with the air inlet pipe.

[0011] The air inlet end of the air inlet pipe is the horn mouth, and the air inlet amount is improved.

[0012] Compared with the prior art, the jet fountain dual-purpose oxygenation machine of the utility model, the fluid passage is of straight-through structure, the air / water inlet has no loss, the air / water inlet amount is larger, and the air inlet speed is faster, through experimental test, the air / water inlet amount is 3-5 times that of the prior art, the impeller of the utility model is of sunken installation structure, so that the length of the rotating shaft of the motor is shorter than that of the prior art, the cost is reduced, and the stability of the motor operation is better, so that the stability of the impeller operation is also better, because one end of the hub is sunken in the counterbore, and the radial gap between the hub and the counterbore is small, when the whole machine operates, the air / water in the fluid passage will only be discharged from the fluid passage, and will not leak from other links, so that the air / water inlet amount in the fluid passage is ensured, and the horn mouth structure on the axial flow hole is added, so that the air / water inlet amount in unit time is greatly improved, when the fountain oxygenation machine and the jet oxygenation machine are switched for use, only the air inlet pipe needs to be installed or removed, and the assembly position and angle of the oxygenation device relative to the float chamber need to be adjusted.

[0013] The axial flow hole is provided with a plurality of spiral guide plates, and the plurality of spiral guide plates connect the axle and the hub together.

[0014] The spiral guide plates make the medium in the "air / water" chamber flow faster and more stably in the axial flow hole, and the thrust is stronger.

[0015] The gap between the hub outer wall and the inner wall of the counterbore is 0.5mm-1mm.

[0016] The smaller gap makes the sealing between the hub and the counterbore better, thereby ensuring the air / water intake.

[0017] The wheel shaft center is provided with a threaded hole, and the rotating shaft of the motor is screwed in the threaded hole.

[0018] The threaded connection structure ensures the concentricity of the rotating shaft of the motor and the wheel shaft, and greatly reduces the eccentric error.

[0019] The pump shell is an integral structure, comprising a middle plate, an annular shell wrapped around the outer edge of the middle plate, a hollowed-out position on the annular shell matching the impeller chamber, thereby forming a mesh structure of the mesh cover, and the inner end of the annular shell is fixedly connected to the front end of the motor.

[0020] The mesh cover and the pump shell adopt an integral structure, so that the concentricity of the mesh cover and the impeller is higher, and the problem of scratching and colliding between the impeller and the mesh cover is less likely to occur.

[0021] The through hole is arranged at the center position of the middle plate, and the inner diameter thereof is smaller than or equal to the inner diameter of the axial hole.

[0022] The length of the connecting line segment formed by the vertical connection between the infinite points on the outer edge line of the blade and the hub center line is consistent.

[0023] The outer edge line of the blade rotates around the hub center line to form a rotary body, which is a cylinder, while the existing blade is usually a fan-shaped structure, and the rotary body formed by the rotation of the outer edge line of the blade around the hub center line is irregular.

[0024] The rear end of the motor is provided with a motor base, at least one pair of fixing holes are arranged on the motor base, and the included angle between the pair of fixing holes is 180°.

[0025] The cable of the utility model extends to the outside world from the motor base, is convenient to install, is more beautiful in appearance, and is more reasonable in design.

[0026] The lower end of the air inlet pipe is fixedly connected with the pump shell, and the upper end is fixed on the support of the buoy tank through buckles, and the installation height of the air inlet pipe on the support is adjusted through the tightness of the buckles.

[0027] The beneficial effects of the utility model are:

[0028] Compared with the prior art, the jet fountain dual-purpose oxygenation machine adopting the structure of the utility model can freely switch between the jet oxygenation machine and the fountain oxygenation machine by installing or dismounting the air inlet pipe and adjusting the position and installation angle of the oxygenation device relative to the buoy tank; the straight-through fluid channel is adopted, the air intake / water intake has no loss, the air intake / water intake is larger, the air intake / water intake speed is faster, and the oxygenation effect is good; the inlet of the air inlet pipe adopts the horn mouth structure, the air intake in unit time is further improved, the inlet of the axial flow hole adopts the horn mouth structure, the air intake / water intake is improved, and the oxygenation effect is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a perspective view of the jet fountain dual-purpose oxygenation machine of the utility model;

[0030] Figure 2 is a sectional view of the jet fountain dual-purpose oxygenation machine of the utility model;

[0031] Figure 3 is Figure 2 the enlarged view of A of

[0032] Figure 4 is a perspective view of one view angle of the utility model used as a jet oxygenation machine;

[0033] Figure 5 is a perspective view of another view angle of the utility model used as a jet oxygenation machine;

[0034] Figure 6 is a sectional view of the utility model used as a jet oxygenation machine;

[0035] Figure 7 is a perspective view of one view angle of the impeller of the jet fountain dual-purpose oxygenation machine of the utility model;

[0036] Figure 8 is a perspective view of another view angle of the impeller of the jet fountain dual-purpose oxygenation machine of the utility model;

[0037] Figure 9 is a perspective view of the utility model used as a fountain oxygenation machine;

[0038] Figure 10 is a three-dimensional exploded view of the fountain oxygenation machine. DETAILED DESCRIPTION

[0039] The application will be further described in detail below in combination with the drawings and specific embodiments:

[0040] Please refer to Figures 1 to 10 The utility model provides a kind of dual-purpose oxygenation machine of jet fountain, with two kinds of oxygenation mode, one is jet oxygenation machine, another is fountain oxygenation machine, the structure between two, difference lies in the installation mode and angle of air inlet pipe 1 and oxygenation device 30 relative to float box 2.

[0041] Embodiment one: jet oxygenation machine includes float box 2 and the oxygenation device 30 of setting on float box 2, the oxygenation device 30 includes motor 3, pump shell 4, impeller 5 and air inlet pipe 1, the pump shell 4 is equipped with "air / water" chamber 6 and impeller chamber 7 in, air inlet pipe 1 is directly connected to "air / water" chamber 6, and "air / water" chamber 6 and impeller chamber 7 are directly penetrated through through-hole 8, the impeller 5 is in impeller chamber 7, and impeller 5 includes hub 9, axle 10 and blade 11, the axle 10 is in hub 9 and axle 10 and hub 9 are concentrically arranged, so that the axial flow hole 12 is formed between axle 10 and hub 9, the hub 9 is opposite the end of "air / water" chamber 6 and sinks in the sink hole 13 of impeller chamber 7, and axial flow hole 12 is coaxial with through-hole 8;The rotating shaft 14 of motor 3 is connected in axle 10;The air inlet pipe 1, "air / water" chamber 6, through-hole 8, axial flow hole 12 form fluid passage together, when impeller 5 is rotated at high speed by motor 3, the huge thrust will push the water in impeller chamber 7 along the axial direction and push out, at this time, the fluid passage is in vacuum negative pressure state, in this way, the air outside is sucked into the fluid passage, and then discharged from the fluid passage, the fluid passage is as "jet passage", and the discharged air is sprayed out along the direction of water flow driven by impeller 5, so as to improve the oxygen content in water.

[0042] As the oxygenation device 30 of jet oxygenation machine, the whole is underwater, the jet direction of impeller 5 keeps parallel with the floating direction of float box 2 on water surface as far as possible, the lower end of air inlet pipe 1 and pump shell 4 are fixedly connected by thread, convenient to install and disassemble, the upper end is fixed on the support 16 of float box 2 by buckle 15, the installation height of air inlet pipe 1 on support 16 is adjusted by the tightness of buckle 15;Motor 3 is provided with motor base 17 at rear end, at least a pair of fixed holes 18 distributed at 180 degrees on motor base 17 are fixed on connecting rod 19 of support 16 by screw, a plurality of mounting holes 20 are arranged on connecting rod 19 along height direction, so that the installation height of motor base 17 on connecting rod 19 is adjustable.In specific use, the four corners of float box 2 have rope hole 21, and the four corners are fixed by rope, so that float box 2 keeps still on water surface.

[0043] Further, in order to improve the intake amount, the axial flow hole 12 is opposite to the one end of the "air / water" chamber 6 and the intake end of the air inlet pipe 1, and is a flared mouth 22.

[0044] The flow direction of the medium after entering the "air / water" chamber 6 is a radial direction, and the medium needs to turn 90 degrees to flow in the axial direction under the action of the vacuum suction force formed by the rotation of the impeller 5, at this time, the flow direction of the medium cannot be consistent, therefore, the utility model discloses that a plurality of spiral guide plates 23 are arranged in the axial flow hole 12, and the plurality of spiral guide plates 23 also connect the wheel shaft 10 and the wheel hub 9 together, so that the spiral guide plates 23 make the medium in the "air / water" chamber 6 consistent in the flow direction after flowing to the axial flow hole 12, the speed is faster and more stable, and the thrust is stronger. Of course, the spiral guide plate 23 can be an extension of the blade 11 root towards the wheel shaft 10.

[0045] The outer wall of the one end of the wheel hub 9 in the counterbore 13 has a flange convex ring 24, and the gap between the outer wall of the flange convex ring 24 and the inner wall of the counterbore 13 is 0.5mm-1mm, and the smaller gap makes the sealing between the wheel hub 9 and the counterbore 13 better, so as to ensure the air / water intake amount; the design of the flange convex ring 24 also helps to form better sealing and vacuum in the counterbore 13.

[0046] The wheel shaft 10 is provided with a threaded hole 25 in the center, and the rotating shaft 14 of the motor 3 is screwed in the threaded hole 25. The threaded connection structure ensures the concentricity of the rotating shaft 14 of the motor 3 and the wheel shaft 10, and greatly reduces the eccentric error.

[0047] The pump shell 4 is an integral molding structure, which comprises a middle plate 26 and an annular shell 27 wrapped outside the middle plate 26, the annular shell 27 is provided with an opening matching the position of the impeller chamber 7, so as to form a mesh structure of the mesh cover 28, and the inner end of the annular shell 27 is fixedly connected to the front end of the motor 3; the annular shell 27 is an elliptical table structure.

[0048] The mesh cover 28 and the pump shell 4 adopt an integral molding structure, so that the concentricity of the mesh cover 28 and the impeller 5 is higher, and the problem of scratching and colliding between the impeller 5 and the mesh cover 28 is not easy to occur, and the strength of the mesh cover 28 is greater during transportation, and the mesh cover 28 is not easy to deform; and the annular shell 27 is an elliptical table structure, and the whole is more firm.

[0049] The through hole 8 of the utility model is arranged at the center position of the middle plate 26, and the inner diameter thereof is smaller than or equal to the inner diameter of the axial flow hole 12.

[0050] The length of the connecting line segment formed by the vertical connection between the infinite points on the outer edge line 29 of the blade 11 and the center line of the wheel hub 9 is consistent.

[0051] That is, the outer edge line 29 of the blade 11, the rotation body formed by rotating around the center line of the hub 9, is a cylinder, and the outer edge line of the conventional blade 11 is generally in a fan-shaped structure, and the rotation body formed by rotating around the center line of the hub is irregular, so that the blade 11 of the utility model has a larger contact area with water, a larger water pushing amount, the projection of the outer edge of the blade 11 on the surface of the hub 9 can realize full coverage, the leakage space is smaller, and the thrust is also larger.

[0052] The installation and height adjustment between the oxygenation device 30 and the float box 2 are more simple and convenient, specifically, the float box 2 is provided with a connecting rod 19 on the support 16, at least one pair of fixing holes 18 on the motor base 17 can be in one-to-one alignment with two of the plurality of mounting holes 20 on the connecting rod 19, so as to be fixedly connected through screws, if the height needs to be adjusted, only the screws need to be disassembled, and the fixing holes 18 are aligned and installed with the mounting holes 20 of the corresponding height, and the other end of the oxygenation device 30 is connected through the air inlet pipe 1, the air inlet pipe 1 and the support 16 are fixed through the buckle 15, the buckle 15 is a loose structure, so as to complete the adjustment and fixation of the height.

[0053] In order to avoid the cable of the motor 3 from being bumped and damaged during transportation and use, the cable of the motor 3 is specially extended axially downward to the motor base 17, and then outward radially from the motor base 17, and the cable is fixed on the motor base 17 through the buckle 15 on the motor base 17.

[0054] Embodiment two: when used as a fountain oxygenation machine, the structure is different from that of the jet flow oxygenation machine, the difference lies in that the air inlet pipe 1 is removed, the direction in which the impeller 5 of the oxygenation device 30 pushes the water flow is vertically upward, that is, the oxygenation device 30 and the float box 2 are relatively vertically arranged, specifically, the water outlet flange 31 is installed on the pump shell 4, and the float box 2 is sleeved and supported on the support plate 32 of the water outlet flange 31.

[0055] After becoming a fountain oxygenation machine, the "air / water" inlet chamber 6 of the removed air inlet pipe 1 is in an open state, which does not affect the normal work of the oxygenation device 30, at this time, the "air / water" inlet chamber 6 is converted into a water inlet chamber, and water is sprayed from the fluid channel, that is, the jet flow medium of the jet flow oxygenation machine is air, and the jet flow medium of the fountain oxygenation machine is water, and the fluid channel becomes a "fountain channel". When the fountain is in operation, in addition to the water spouting upward through the fluid channel, the impeller 5 rotates, and the thrust caused by the high-speed rotation of the blade 11 can also assist the power of the spouting.

[0056] The impeller 5 of the embodiment has higher concentricity in assembly with the water outlet flange 31 of the fountain oxygenation machine, so that the thrust generated by high-speed rotation of the impeller 5 can pass through the water outlet flange 31 with full efficiency, thereby making the fountain oxygenation machine have higher working efficiency, and the gap between the outer diameter of the impeller 5 and the inner diameter of the inner wall of the water outlet flange 31 is smaller, so that the leakage amount of water in the pump shell 4 is smaller.

[0057] Since the impeller 5 of the fountain oxygenation machine is submerged in water at a shallow distance, and the flow rate pushed by the rotation of the impeller 5 is relatively large, if the water inflow is not large enough, air is easily sucked in, and cavitation is generated, therefore, the annular shell 27 of the utility model is in an elliptical table structure, so that the hollowing 34 (i.e. water inlet hole) on the pump shell 4 can be made larger, thereby greatly increasing the water inflow per unit time, thereby avoiding the entry of air.

[0058] Due to the ingenious design, the assembly of the float box 2 of the embodiment also becomes simple, that is, the water outlet flange 31 is first fixed on the pump shell 4, then the float box 2 is directly placed on the water outlet flange 31, and the screws 33 are screwed to fix the float box 2 on the support plate 32, so that the installation can be realized, which is convenient and simple.

[0059] As described above, the jet fountain dual-purpose oxygenation machine of the utility model has a straight-through structure of the fluid passage, no loss of air inflow / water inflow, larger air inflow / water inflow and faster air inflow speed, and through experimental testing, the air inflow / water inflow is 3-5 times that of the prior art; the impeller 5 of the utility model is in a sinking installation structure, so that the length of the rotating shaft 14 of the motor 3 is shorter than that of the prior art, the cost is reduced, the stability of the motor 3 is better, and the stability of the operation of the impeller 5 is also better; since one end of the hub 9 is submerged in the counterbore 13, and the radial gap between the hub 9 and the counterbore 13 is small, during the operation of the whole machine, the air / water in the fluid passage will only be discharged from the fluid passage, but not from other links, so as to ensure the air inflow / water inflow in the fluid passage, and the horn mouth 22 on the axial flow hole 12, thereby greatly increasing the air inflow / water inflow per unit time.

[0060] The jet fountain dual-purpose oxygenation machine provided by the embodiment of the utility model is described in detail above, and the principles and implementation modes of the utility model are described by applying specific examples in this paper; the above embodiment is only used to help understand the technical solutions disclosed by the utility model; meanwhile, for those skilled in the art, according to the idea of the utility model, the specific implementation modes and application ranges will be changed, and the above description should not be understood as a limitation of the utility model.

Claims

1. A dual-purpose jet fountain oxygenation machine, comprising a floating box and an oxygenation device arranged on the floating box, the oxygenation device comprising a motor, a pump shell and an impeller, characterized in that: The pump shell is provided with an air / water inlet chamber and an impeller chamber, the air / water inlet chamber and the impeller chamber are directly connected through a through hole, the impeller is located in the impeller chamber, and the impeller comprises a hub, a shaft and blades, the shaft is located in the hub and is concentrically arranged with the hub, so that an axial flow hole is formed between the shaft and the hub, one end of the hub opposite to the air / water inlet chamber is located in a counterbore of the impeller chamber, and the axial flow hole is coaxial with the through hole; the rotating shaft of the motor is connected in the shaft; the air / water inlet chamber, the through hole and the axial flow hole jointly form a fluid channel; and one end of the axial flow hole opposite to the air / water inlet chamber is an outwardly expanding horn.

2. The jet fountain dual oxygenation machine according to claim 1, characterized in that: The axial flow hole is provided with a plurality of spiral guide plates, and the plurality of spiral guide plates connect the shaft and the hub together.

3. The dual-purpose jet fountain and oxygen-increasing machine according to claim 1 or 2, characterized in that: The gap between the outer wall of the hub and the inner wall of the counterbore is 0.5mm-1mm.

4. The dual-purpose jet fountain and oxygen-increasing machine according to claim 1, characterized in that: The center of the shaft is provided with a threaded hole, and the rotating shaft of the motor is screwed in the threaded hole.

5. The dual-purpose jet fountain and oxygen-increasing machine according to claim 1, characterized in that: The pump shell is an integral structure, comprising a middle plate and an annular shell wrapped around the outer edge of the middle plate, the annular shell is provided with an opening at the position matched with the impeller chamber, so as to form a mesh structure of the mesh cover, and the inner end of the annular shell is fixedly connected to the front end of the motor; the annular shell is an elliptical table structure.

6. The dual-purpose jet fountain and oxygen increasing machine according to claim 1 or 2 or 4 or 5, characterized in that: The through hole is arranged at the center position of the middle plate, and the inner diameter of the through hole is less than or equal to the inner diameter of the axial flow hole; the length of the connecting line segment formed between the vertical connection of the outer edge line of the blade and the hub center line is consistent.

7. The dual-purpose jet fountain and oxygen-increasing machine according to claim 1 or 4 or 5, characterized in that: The rear end of the motor is provided with a motor seat, at least one pair of fixing holes are arranged on the motor seat, and the included angle between the pair of fixing holes is 180°; the cable of the motor extends axially downward to the motor seat, and then extends radially outward from the motor seat, and the cable is fixed on the motor seat by buckling on the motor seat.

8. The dual-purpose jet fountain oxygenator of claim 1, characterized in that: The air inlet pipe is directly connected to the air inlet chamber; the air inlet end of the air inlet pipe is a horn, which improves the air intake.

9. The dual-purpose jet fountain and oxygen-increasing machine according to claim 8, characterized in that: The lower end of the air inlet pipe is fixedly connected to the pump shell, and the upper end is fixed to the bracket of the floating box by buckling, and the installation height of the air inlet pipe on the bracket is adjusted by the tightness of the buckle; the pair of fixing holes of the motor seat are fixed on the connecting rod of the bracket by screws, and a plurality of mounting holes are arranged on the connecting rod in the height direction, so that the installation height of the motor seat on the connecting rod is adjustable.

10. The dual-purpose jet fountain and oxygen-increasing machine according to any one of claims 1-7, characterized in that: The pump shell is provided with a water outlet flange, the floating box is fixedly sleeved on the water outlet flange, and the axis of the impeller is collinear with the center line of the water outlet flange.

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