Low-noise vertical mixed-flow pump

Abstract

The invention discloses a low-noise vertical mixed-flow pump, and relates to the technical field of mixed-flow pumps, the low-noise vertical mixed-flow pump comprises a water outlet elbow, one end of the water outlet elbow is fixedly connected with a pump shell, the end, away from the water outlet elbow, of the pump shell is fixedly connected with a horn pipe, and the circumferential outer wall of the water outlet elbow is fixedly connected with a sealing shell; a coupler is arranged at the top of the sealing shell, a rotating column is arranged at one end of the coupler, one end of the rotating column penetrates through the interior of the sealing shell, a hub is fixedly connected to the end, away from the coupler, of the rotating column, and impellers distributed circularly at equal intervals are fixedly connected to the outer wall of the circumference of the hub. According to the mixed-flow pump, the bending direction of the first flow guide plate and the second flow guide plate is the same as that of the water outlet elbow, so that liquid can flow smoothly, violent impact and turbulent flow caused by sudden change of the direction or encountering obstacles are avoided, the cavitation phenomenon is restrained, high-frequency noise is reduced, and the operation efficiency and stability of the mixed-flow pump are improved.

Description

Technical Field

[0001] The invention relates to the technical field of mixed flow pumps, and in particular to a low-noise vertical mixed flow pump. Background Art

[0002] A mixed flow pump is a vane pump that combines the characteristics of a centrifugal pump and an axial flow pump. It can produce high pressure like a centrifugal pump and high flow like an axial flow pump. The working principle of a mixed flow pump is between that of a centrifugal pump and an axial flow pump. When the impeller rotates, the liquid is not only affected by the centrifugal force, but also by the pushing of the impeller blades, so that the flow direction of the liquid in the impeller is oblique, with both radial and axial components, thereby achieving the delivery and lifting of the liquid.

[0003] As society's requirements for the environment are increasing and people pay more attention to the comfort of their working and living environments, the noise generated during the operation of mixed flow pumps has gradually become a focus, especially in densely populated urban areas and places with strict noise control, such as hospitals, schools, and pump rooms near residential areas. The noise of mixed flow pumps will cause serious interference to the surrounding environment. Noise will not only affect people's normal rest, study and work, but long-term exposure to high-decibel noise environments may also have adverse effects on human health, such as causing hearing loss, neurasthenia and other diseases.

[0004] At present, some manufacturers add soundproof covers to the outside of the pump body. Although this can block some noise transmission, the installation of the soundproof cover not only increases the equipment cost and maintenance difficulty, but also affects the heat dissipation of the pump body, resulting in a decrease in the operating efficiency of the pump. Therefore, a low-noise vertical mixed flow pump is urgently needed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a low-noise vertical mixed-flow pump.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A low-noise vertical mixed-flow pump comprises a water outlet elbow, one end of the water outlet elbow is fixedly connected to a pump casing, one end of the pump casing away from the water outlet elbow is fixedly connected to a trumpet pipe, a circumferential outer wall of the water outlet elbow is fixedly connected to a sealing shell, a coupling is arranged on the top of the sealing shell, a rotating column is arranged at one end of the coupling, one end of the rotating column passes through the interior of the sealing shell, one end of the rotating column away from the coupling is fixedly connected to a hub, and the circumferential outer wall of the hub is fixedly connected to impellers distributed in a circle at equal distances; The pump housing is provided with a first noise reduction component and a second noise reduction component for reducing the noise of the mixed flow pump when it is working; A power component that drives the first noise reduction component to work is arranged inside the pump housing; The circumferential outer wall of the water outlet elbow is fixedly connected with a pump seat.

[0007] The present invention is further configured such that the pump casing comprises a vertical pipe, an arc-shaped pipe and a spherical pipe, and the impeller is located inside the spherical pipe.

[0008] The present invention is further configured such that the first noise reduction component includes a reinforcing column fixedly connected to the circumferential inner wall of the vertical pipe, the other end of the reinforcing column is fixedly connected to a base, the cross-section of the base is semicircular, the top outer wall of the base is fixedly connected to a storage shell, the cross-section of the storage shell is bullet-shaped, the interior of the storage shell is respectively provided with a first guide plate and a second guide plate, the circumferential outer wall of the storage shell is provided with a first through groove and a second through groove, the specifications of the first through groove are adapted to the specifications of the first guide plate, and the specifications of the second through groove are adapted to the specifications of the second guide plate.

[0009] The present invention is further configured such that the number of the first guide plates and the number of the second guide plates are both four, and the bending direction of the first guide plates and the second guide plates is the same as that of the water outlet elbow.

[0010] The present invention is further configured such that the second noise reduction component includes silencer holes that are equidistantly distributed on the circumferential inner wall of the spherical tube, the silencer holes include semicircular grooves and arcuate grooves, the semicircular grooves are connected to the arcuate grooves, and the arcuate grooves are obliquely opened on the circumferential inner wall of the spherical tube.

[0011] The present invention is further configured such that the power assembly includes a fixed block fixedly connected to the circumferential outer wall of the rotating column, the bottom of the fixed block is fixedly connected to a mounting plate, the bottom of the mounting plate is fixedly connected to a ball head shaft, the inside of the ball head shaft is rotatably connected to a ball head block, the circumferential outer wall of the ball head block is fixedly connected to a connecting rod, and the end of the connecting rod away from the ball head block is fixedly connected to a counterweight ball.

[0012] The present invention is further configured as follows: the interior of the base is provided with adjustment plates which are equidistantly distributed in a circle, the number of the adjustment plates is four, the circumferential outer wall of the connecting rod is fixedly connected with a rotating seat, the interior of the rotating seat is rotatably connected with a rotating head, one end of the rotating head is fixedly connected with a connecting rod, the end of the connecting rod away from the rotating head is rotatably connected with a rolling ball, a sliding groove is provided on the circumferential inner wall of the adjustment plate, the rolling ball cooperates with the sliding groove, the top outer wall of the adjustment plate is fixedly connected with a vertical plate, and the end of the vertical plate away from the adjustment plate is fixedly connected to the bottom outer wall of the first guide plate.

[0013] The present invention is further configured such that a gap is formed between the four adjustment plates, and the width of the gap is smaller than the diameter of the rolling ball.

[0014] The present invention is further configured such that a circular hole is opened on the circumferential inner wall of the base, a movable rod is fixedly connected to the circumferential outer wall of the adjustment plate, one end of the movable rod passes through the inside of the circular hole, and one end of the movable rod away from the adjustment plate is fixedly connected to a limiting block, and the diameter of the limiting block is larger than the inner diameter of the circular hole.

[0015] The present invention is further configured such that an arc column is fixedly connected to the top outer wall of the adjustment plate, the other end of the arc column is fixedly connected to the second guide plate, and the second guide plate is closer to the rotating column than the first guide plate.

[0016] The beneficial effects of the present invention are: 1. A low-noise vertical mixed-flow pump is provided with a pump casing. When the external motor is started, the rotating column is driven to rotate through the coupling, and then the hub and the impeller rotate together to transport and lift the liquid. During this process, the impeller is located in the spherical tube, which can make the sound waves generated by the mixed flow pump during infusion reflect multiple times. The dispersed reflection mode allows the sound wave energy to interfere with and offset each other, thereby reducing the intensity of the noise propagating outward. At the same time, its curved surface structure guides the liquid to flow more smoothly around the impeller, so that the liquid flow rate and pressure are evenly distributed, reducing the noise generated by unstable flow. In addition, the silencer holes on the inner wall of the circumference of the spherical tube allow the sound waves to resonate with the air column in the hole after entering, converting the sound energy into heat energy, weakening the intensity of the sound waves transmitted out of the pump casing, destroying the mirror reflection conditions of the sound waves, increasing the propagation path and attenuation, and reducing the noise inside the pump and propagating outward. In addition, the first guide plate and the second guide plate have the same bending direction as the outlet elbow, so that the liquid can flow smoothly, avoiding violent impact and turbulence of the fluid due to sudden changes in direction or encountering obstacles, suppressing cavitation, reducing high-frequency noise, and improving the operating efficiency and stability of the mixed flow pump.

[0017] 2. A low-noise vertical mixed-flow pump is provided with a second noise reduction component. When the mixed-flow pump conveys and lifts liquid, the liquid collides with the silencer hole, and the impurities therein are blocked by the semicircular groove, thereby simply collecting the impurities in the liquid, avoiding the impurities from rubbing against the inner wall of the outlet elbow during subsequent conveying to generate noise. Moreover, the inclined arc groove can quickly discharge the impurities deposited in the semicircular groove, making it convenient for the staff to clean the mixed-flow pump.

[0018] 3. A low-noise vertical mixed flow pump is provided with a first noise reduction component and a power component. When the rotating column rotates, it drives the counterweight ball to rotate. The centrifugal force generated by the counterweight ball drives the connecting rod to open, and then the thrust is applied to the adjustment plate through the rolling ball, and the four groups of adjustment plates are opened, so that the first guide plate is moved out of the storage shell to guide and transport the water flow. When the pumping power of the mixed flow pump is increased, the centrifugal force of the counterweight ball increases, and the diffusion thrust of the rolling ball on the adjustment plate also increases. The first guide plate continues to diffuse outward, driving the second guide plate to move out of the storage shell. This process realizes the automatic adjustment of the number of guide plates according to the pumping power of the pump, avoiding the problem of too many guide plates when the power is low. Affects the delivery volume and lift, or when the power is high, the guide plate is insufficient and causes excessive noise. The bending direction of the first guide plate and the second guide plate is the same as the bending direction of the outlet elbow. Therefore, the liquid can flow smoothly along the curved surface of the guide plate and the pump casing, avoiding violent impact and turbulence caused by sudden changes in direction or encountering obstacles during the flow of the fluid. The weakening of the fluid impact directly reduces the noise caused by the impact, and also helps to optimize the flow state of the fluid in the pump, reduce local pressure fluctuations, and thus reduce the occurrence of cavitation. Cavitation will produce high-frequency noise. By suppressing cavitation, this part of the noise can be effectively reduced, and the operating efficiency and stability of the mixed flow pump can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall front structure of a low-noise vertical mixed-flow pump proposed by the present invention; Figure 2 This is a schematic diagram of the overall half-section structure of a low-noise vertical mixed-flow pump proposed by the present invention; Figure 3 A low-noise vertical mixed flow pump proposed by the present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle; Figure 4 This is a schematic diagram of the overall half-section plan structure of a low-noise vertical mixed-flow pump proposed by the present invention; Figure 5 A low-noise vertical mixed flow pump proposed by the present invention Figure 4 A schematic diagram of the enlarged structure at B in the middle; Figure 6 This is a schematic diagram of the front structure of a storage shell of a low-noise vertical mixed-flow pump proposed by the present invention; Figure 7 This is a schematic diagram of a top view of the structure of a storage shell of a low-noise vertical mixed-flow pump proposed by the present invention; Figure 8 This is a schematic diagram of the internal structure of a storage shell of a low-noise vertical mixed-flow pump proposed by the present invention; Fig. 9 This is a schematic diagram of the bottom structure of the first guide plate and the second guide plate of a low-noise vertical mixed flow pump proposed by the present invention.

[0020] In the figure: 1, outlet elbow; 2, pump seat; 3, pump housing; 3001, vertical pipe; 3002, arc pipe; 3003, spherical pipe; 4, trumpet pipe; 5, sealing shell; 6, coupling; 7, rotating column; 8, silencer hole; 8001, semicircular groove; 8002, arc groove; 9, wheel hub; 10, impeller; 11, base; 12, storage shell; 13, first through groove; 14, first guide plate; 15 , limit block; 16, round hole; 17, movable rod; 18, fixed block; 19, mounting plate; 20, ball head shaft; 21, ball head block; 22, connecting rod; 23, counterweight ball; 24, rotating seat; 25, adjustment plate; 26, rotating head; 27, connecting rod; 28, rolling ball; 29, slide groove; 30, reinforcement column; 31, second through groove; 32, second guide plate; 33, vertical plate; 34, arc column. DETAILED DESCRIPTION

[0021] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0024] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0025] Reference Figure 1-Figure 9A low-noise vertical mixed-flow pump comprises a water outlet elbow 1, one end of the water outlet elbow 1 is fixedly connected to a pump casing 3, the end of the pump casing 3 away from the water outlet elbow 1 is fixedly connected to a trumpet tube 4, the circumferential outer wall of the water outlet elbow 1 is fixedly connected to a sealing shell 5, a coupling 6 is arranged on the top of the sealing shell 5, a rotating column 7 is arranged at one end of the coupling 6, one end of the rotating column 7 passes through the inside of the sealing shell 5, the end of the rotating column 7 away from the coupling 6 is fixedly connected to a hub 9, and the circumferential outer wall of the hub 9 is fixedly connected to impellers 10 distributed in a circle at equal distances; The pump housing 3 is provided with a first noise reduction component and a second noise reduction component for reducing the noise of the mixed flow pump when it is working; The pump housing 3 is provided with a power assembly for driving the first noise reduction assembly to work; The circumferential outer wall of the outlet elbow 1 is fixedly connected to the pump seat 2, which can achieve secondary noise reduction when the mixed flow pump is working, and avoid the situation where the mixed flow pump generates serious noise when working and causes serious interference to the surrounding environment.

[0026] Specifically, the pump casing 3 includes a vertical tube 3001, an arc tube 3002 and a spherical tube 3003, and the impeller 10 is located inside the spherical tube 3003. The special structural design of the pump casing 3 plays an important role in reducing noise. When the mixed flow pump is infusing liquid, the arc surface structure of the spherical tube 3003 causes sound waves to be reflected multiple times inside the spherical tube 3003. The dispersed reflection mode causes the sound wave energy to interfere with and offset each other, thereby reducing the intensity of the noise propagating outward. It guides the liquid to flow more smoothly around the impeller 10, so that the liquid flow rate and pressure are evenly distributed, reducing the noise generated by unstable flow. At the same time, after the sound wave enters the silencer hole 8, it resonates with the air column in the hole, converting the sound energy into heat energy, weakening the intensity of the sound wave transmitted out of the pump casing 3, destroying the mirror reflection condition of the sound wave, increasing the propagation path and attenuation degree, and reducing the noise inside the pump and propagating outward.

[0027] Specifically, the first noise reduction component includes a reinforcing column 30 fixedly connected to the circumferential inner wall of the vertical pipe 3001, and the other end of the reinforcing column 30 is fixedly connected to a base 11, the cross-section of the base 11 is semicircular, and the top outer wall of the base 11 is fixedly connected to a storage shell 12, the cross-section of the storage shell 12 is bullet-shaped, and the interior of the storage shell 12 is respectively provided with a first guide plate 14 and a second guide plate 32, and the circumferential outer wall of the storage shell 12 is provided with a first through groove 13 and a second through groove 31, the specifications of the first through groove 13 are adapted to the specifications of the first guide plate 14, and the specifications of the second through groove 31 are adapted to the specifications of the second guide plate 32. When the mixed flow pump is working, the liquid flows through here, and the guide plate guides the liquid to flow smoothly, avoiding violent impact and turbulence of the fluid due to sudden change in direction or encountering obstacles, suppressing cavitation, reducing high-frequency noise, and improving the operating efficiency and stability of the mixed flow pump.

[0028] Specifically, the number of the first guide plates 14 and the second guide plates 32 are both four, and the first guide plates 14 and the second guide plates 32 are both in the same bending direction as the outlet elbow 1. The first guide plates 14 and the second guide plates 32 inside the storage shell 12 are alternately distributed. The first guide plates 14 and the second guide plates 32 are designed to be consistent with the bending direction of the outlet elbow 1, so that the liquid can flow along a reasonable path. When the liquid flows out of the impeller 10 and enters the pump casing 3, the first guide plates 14 and the second guide plates 32 guide the liquid to flow toward the outlet elbow 1, reducing the impact and turbulence of the liquid in the pump, further reducing noise generation, and at the same time optimizing the flow state of the fluid in the pump and improving the performance of the mixed flow pump.

[0029] Specifically, the second noise reduction component includes silencer holes 8 that are equidistantly distributed on the circumferential inner wall of the spherical tube 3003. The silencer holes 8 include semicircular grooves 8001 and arcuate grooves 8002. The semicircular grooves 8001 are connected to the arcuate grooves 8002. The arcuate grooves 8002 are obliquely opened on the circumferential inner wall of the spherical tube 3003. When the mixed flow pump transports and lifts the liquid, the liquid collides with the silencer holes 8. The semicircular grooves 8001 block impurities in the liquid to prevent the impurities from rubbing against the inner wall of the outlet elbow 1 during subsequent transportation to generate noise. The obliquely opened arcuate grooves 8002 allow the impurities deposited in the semicircular grooves 8001 to be quickly discharged, making it convenient for the staff to clean the mixed flow pump.

[0030] Specifically, the power assembly includes a fixed block 18 fixedly connected to the circumferential outer wall of the rotating column 7, the bottom of the fixed block 18 is fixedly connected to a mounting plate 19, the bottom of the mounting plate 19 is fixedly connected to a ball head shaft 20, the inner rotation of the ball head shaft 20 is connected to a ball head block 21, the circumferential outer wall of the ball head block 21 is fixedly connected to a connecting rod 22, and the end of the connecting rod 22 away from the ball head block 21 is fixedly connected to a counterweight ball 23. When the rotating column 7 rotates, the counterweight ball 23 rotates to generate centrifugal force, driving the connecting rod 22 to open and provide a power source for the normal operation of the subsequent second noise reduction assembly.

[0031] Specifically, the interior of the base 11 is provided with adjusting plates 25 which are equidistantly distributed in a circle, and the number of the adjusting plates 25 is four. The circumferential outer wall of the connecting rod 22 is fixedly connected with a rotating seat 24, and the interior of the rotating seat 24 is rotatably connected with a rotating head 26, and one end of the rotating head 26 is fixedly connected with a connecting rod 27, and the end of the connecting rod 27 away from the rotating head 26 is rotatably connected with a rolling ball 28. A chute 29 is provided on the circumferential inner wall of the adjusting plate 25, and the rolling ball 28 cooperates with the chute 29. The top outer wall of the adjusting plate 25 is fixedly connected with a vertical plate 33, and one end of the vertical plate 33 away from the adjusting plate 25 is fixedly connected to the bottom outer wall of the first guide plate 14. When the counterweight ball 23 drives the connecting rod 22 to open, the rolling ball 28 slides in the chute 29, and the adjusting plate 25 is stretched open, so that the first guide plate 14 is moved out of the storage shell 12 to guide and transport the water flow.

[0032] Specifically, a gap is formed between the four adjustment plates 25, and the width of the gap is smaller than the diameter of the rolling ball 28, ensuring that when the rolling ball 28 opens the adjustment plates 25, the adjustment plates 25 can be stably stressed and the rolling ball 28 will not slip due to excessive gaps, thereby ensuring that the first guide plate 14 can be stably moved out of the storage shell 12 and guide the water flow.

[0033] Specifically, a circular hole 16 is opened on the circumferential inner wall of the base 11, and a movable rod 17 is fixedly connected to the circumferential outer wall of the adjustment plate 25. One end of the movable rod 17 passes through the inside of the circular hole 16, and the end of the movable rod 17 away from the adjustment plate 25 is fixedly connected to the limiting block 15. The diameter of the limiting block 15 is larger than the inner diameter of the circular hole 16, which limits the movement range of the adjustment plate 25 and prevents the adjustment plate 25 from excessively moving away from the base 11, thereby ensuring the stability of the first guide plate 14 and the second guide plate 32 during the adjustment process.

[0034] Specifically, the top outer wall of the adjustment plate 25 is fixedly connected with an arc column 34, and the other end of the arc column 34 is fixedly connected to the second guide plate 32. The second guide plate 32 is closer to the rotating column 7 than the first guide plate 14. When the first guide plate 14 is diffused outward to a certain extent by the thrust of the rolling ball 28, the second guide plate 32 is driven to move out of the storage shell 12, so that the number of guide plates is automatically adjusted according to the pumping power of the pump, so as to avoid the situation where too many guide plates affect the delivery volume and lift when the power is low, or too many guide plates are insufficient when the power is high, resulting in excessive noise. The guide plates guide the liquid to flow smoothly and reduce noise.

[0035] Working principle: When in use, after the coupling 6 is fixedly connected to the external motor, starting the motor can drive the rotating column 7 to rotate, and then the hub 9 at the bottom of the rotating column 7 and the impeller 10 can rotate together to achieve the transportation and lifting of the liquid. During the rotation of the impeller 10, since the impeller 10 is arranged in the spherical tube 3003 area in the pump housing 3, the spherical tube 3003 can make the sound waves generated by the mixed flow pump during the infusion process be reflected multiple times at different angles to avoid concentrated reflection to form high-intensity reflected noise. The dispersed reflection mode allows the sound wave energy to interfere with and offset each other, thereby reducing the intensity of the noise propagating outward. At the same time, the inner wall of the spherical tube 3003 is a curved surface structure, which can guide the liquid to flow around the impeller more smoothly. 10 flow, so that the flow velocity and pressure distribution of the liquid when entering and leaving the impeller 10 are more uniform, turbulence and vortex phenomena are reduced, and the noise generated by the unstable flow of the liquid is reduced. In addition, the circumferential inner wall of the spherical tube 3003 is also provided with equidistant circularly distributed silencer holes 8, through which sound waves can enter the holes, and the air column in the holes resonates with the sound waves, so that the sound energy is converted into heat energy, and the intensity of the sound waves transmitted out of the pump housing 3 is weakened, and the high-frequency noise suppression effect is significant. In addition, the silencer holes 8 destroy the mirror reflection conditions of the sound waves, and promote the sound waves to be reflected multiple times between the holes and between the holes and the walls of the pump housing 3, thereby increasing the propagation path and attenuation degree, reducing the noise in the pump housing 3 and reducing the intensity of the outward propagation, thereby achieving a one-time noise reduction of the entire mixed flow pump; In the process of the mixed flow pump conveying and lifting the liquid, when the liquid collides with the silencer hole 8, the impurities contained in the liquid will be blocked by the semicircular groove 8001. The semicircular groove 8001 can simply block and collect the impurities in the sucked liquid, so as to avoid the impurities being conveyed along with the liquid and rubbing against the inner wall of the outlet elbow 1 to generate noise during the subsequent liquid suction process. The inclined arc groove 8002 can facilitate the rapid discharge of impurities deposited in the semicircular groove 8001, which is convenient for the staff to clean the entire mixed flow pump. When the rotating column 7 rotates, it can drive the weight ball 23 to rotate together. The weight ball 23 generates centrifugal force during the rotation process, so that the weight ball 23 drives the connecting rod 22 to open together (that is, spread to the surroundings of the rotating column 7). When the connecting rod 22 is opened, the centrifugal force acts on the connecting rod 27 and the rolling ball 28. At this time, the rolling ball 28 is subjected to the diffusion thrust. The diffusion thrust can be applied to the adjustment plate 25 through the rolling ball 28, so that the four groups of adjustment plates 25 can be quickly opened, and the adjustment plates 25 The vertical plate 33 is fixedly connected to the first guide plate 14. When the adjusting plate 25 is opened to a certain distance, the four groups of guide plates will be completely removed from the storage shell 12 to guide and transport the water flow inside the entire pump body. When the staff increases the pumping power of the mixed flow pump, the centrifugal force on the counterweight ball 23 will increase again, so that the diffusion thrust of the rolling ball 28 on the adjusting plate 25 will also increase again. At this time, the first guide plate 14 will continue to diffuse outward. At the same time, because the first guide plate 14 diffuses to a certain distance, It can drive the second guide plates 32 on both sides to move out of the storage shell 12, thereby increasing the number of guide plates and avoiding the situation where the noise of the pump body is significantly increased during the process of increasing the delivery power, completing the secondary noise reduction of the pump body, and realizing the automatic adjustment of the pump body with different numbers of guide plates under high and low power, thereby avoiding the situation where a large number of guide plates affect its delivery volume and head when the power is low, or the situation where the number of guide plates is insufficient at high power, resulting in excessive noise. The bending direction of the first guide plate 14 and the second guide plate 32 is the same as the bending direction of the water outlet elbow 1, so that the liquid can flow smoothly along the curved surface of the guide plate and the pump shell 3, avoiding violent impact and turbulence caused by sudden changes in direction or encountering obstacles during the flow of the fluid. The weakening of the fluid impact directly reduces the noise generated by the impact, and also helps to optimize the flow state of the fluid in the pump, reduce local pressure fluctuations, and thus reduce the occurrence of cavitation. Cavitation will produce high-frequency noise. By suppressing cavitation, this part of the noise can be effectively reduced, thereby improving the operating efficiency and stability of the mixed flow pump.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A low-noise vertical mixed-flow pump, comprising a water outlet elbow (1), characterized in that: One end of the outlet elbow (1) is fixedly connected to a pump casing (3), one end of the pump casing (3) away from the outlet elbow (1) is fixedly connected to a bell tube (4), the circumferential outer wall of the outlet elbow (1) is fixedly connected to a sealing casing (5), a coupling (6) is provided on the top of the sealing casing (5), a rotating column (7) is provided at one end of the coupling (6), one end of the rotating column (7) passes through the interior of the sealing casing (5), one end of the rotating column (7) away from the coupling (6) is fixedly connected to a wheel hub (9), and the circumferential outer wall of the wheel hub (9) is fixedly connected to impellers (10) distributed in a circular shape and at equal distances; The pump housing (3) is provided with a first noise reduction component and a second noise reduction component for reducing the noise of the mixed flow pump when it is working; A power component for driving the first noise reduction component to work is arranged inside the pump housing (3); The circumferential outer wall of the water outlet elbow (1) is fixedly connected to a pump seat (2).

2. A low-noise vertical mixed flow pump according to claim 1, characterized in that: The pump casing (3) comprises a vertical pipe (3001), an arc-shaped pipe (3002) and a spherical pipe (3003), and the impeller (10) is located inside the spherical pipe (3003).

3. A low noise vertical mixed flow pump according to claim 2, characterized in that: The first noise reduction component comprises a reinforcing column (30) fixedly connected to the circumferential inner wall of the vertical pipe (3001); the other end of the reinforcing column (30) is fixedly connected to a base (11); the cross section of the base (11) is semicircular; the top outer wall of the base (11) is fixedly connected to a storage shell (12); the cross section of the storage shell (12) is bullet-shaped; a first guide plate (14) and a second guide plate (32) are respectively arranged inside the storage shell (12); a first through groove (13) and a second through groove (31) are opened on the circumferential outer wall of the storage shell (12); the specification of the first through groove (13) is compatible with the specification of the first guide plate (14); the specification of the second through groove (31) is compatible with the specification of the second guide plate (32).

4. A low-noise vertical mixed flow pump according to claim 3, characterized in that: The number of the first guide plates (14) and the number of the second guide plates (32) are both four, and the bending direction of the first guide plates (14) and the second guide plates (32) is the same as that of the water outlet elbow (1).

5. A low noise vertical mixed flow pump according to claim 3, characterized in that: The second noise reduction component comprises silencing holes (8) which are arranged at equal distances on the circumferential inner wall of the spherical tube (3003); the silencing holes (8) comprise a semicircular groove (8001) and an arcuate groove (8002); the semicircular groove (8001) is connected to the arcuate groove (8002); and the arcuate groove (8002) is arranged at an angle on the circumferential inner wall of the spherical tube (3003).

6. A low-noise vertical mixed flow pump according to claim 5, characterized in that: The power assembly comprises a fixed block (18) fixedly connected to the circumferential outer wall of the rotating column (7); the bottom of the fixed block (18) is fixedly connected to a mounting plate (19); the bottom of the mounting plate (19) is fixedly connected to a ball head shaft (20); the inside of the ball head shaft (20) is rotatably connected to a ball head block (21); the circumferential outer wall of the ball head block (21) is fixedly connected to a connecting rod (22); and one end of the connecting rod (22) away from the ball head block (21) is fixedly connected to a counterweight ball (23).

7. A low noise vertical mixed flow pump according to claim 6, characterized in that: The base (11) is provided with adjusting plates (25) which are equidistantly distributed in a circular shape. The number of the adjusting plates (25) is four. The circumferential outer wall of the connecting rod (22) is fixedly connected to a rotating seat (24). The interior of the rotating seat (24) is rotatably connected to a rotating head (26). One end of the rotating head (26) is fixedly connected to a connecting rod (27). The end of the connecting rod (27) away from the rotating head (26) is rotatably connected to a rolling ball (28). A sliding groove (29) is provided on the circumferential inner wall of the adjusting plate (25). The rolling ball (28) cooperates with the sliding groove (29). The top outer wall of the adjusting plate (25) is fixedly connected to a vertical plate (33). The end of the vertical plate (33) away from the adjusting plate (25) is fixedly connected to the bottom outer wall of the first guide plate (14).

8. A low-noise vertical mixed flow pump according to claim 7, characterized in that: Gaps are formed between the four adjustment plates (25), and the width of the gaps is smaller than the diameter of the rolling balls (28).

9. A low-noise vertical mixed flow pump according to claim 8, characterized in that: A circular hole (16) is formed on the circumferential inner wall of the base (11); a movable rod (17) is fixedly connected to the circumferential outer wall of the adjustment plate (25); one end of the movable rod (17) passes through the inside of the circular hole (16); one end of the movable rod (17) away from the adjustment plate (25) is fixedly connected to a limit block (15); and the diameter of the limit block (15) is greater than the inner diameter of the circular hole (16).

10. A low-noise vertical mixed flow pump according to claim 9, characterized in that: An arc column (34) is fixedly connected to the top outer wall of the adjustment plate (25), and the other end of the arc column (34) is fixedly connected to the second guide plate (32), and the second guide plate (32) is closer to the rotating column (7) than the first guide plate (14).

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