Anti-blocking flow guide axial flow pump

Abstract

The invention relates to the technical field of axial flow pumps, and discloses an anti-blocking flow guide axial flow pump which comprises a shell, a driving motor is arranged above the shell, a first bevel gear is arranged on the driving motor, a second bevel gear is arranged below the first bevel gear, the first bevel gear is meshed with a second bevel gear, and the axis directions of the first bevel gear and the second bevel gear are perpendicular. A third bevel gear is coaxially arranged above the second bevel gear, two fourth bevel gears are oppositely arranged on the third bevel gear, the two fourth bevel gears are both meshed with the third bevel gear, a fifth bevel gear is coaxially arranged above the third bevel gear, and a rotating pipe is coaxially arranged at the bottom of the third bevel gear; a rotating rod is coaxially arranged at the bottom of the fifth bevel gear and located in a rotating pipe, an impeller is arranged on the rotating rod, a flow guide part is arranged on the rotating pipe, a plurality of first blades are arranged on the face, close to the flow guide part, of the impeller, and a plurality of second blades are arranged at the bottom of the rotating pipe. The pump body can be prevented from being blocked by aquatic plants, and meanwhile the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of axial flow pumps, and in particular to an anti-blocking and diverting axial flow pump. Background Art

[0002] An axial-flow pump is a vane-type pump that uses a rotating impeller to exert axial thrust on the fluid. Its core characteristic is that the fluid flows parallel to the pump shaft. Its operating principle is based on the aerodynamic theory of airfoil lift. The impeller blades are designed with an airfoil-shaped cross-section. As the impeller rotates, a pressure differential is generated between the upper and lower surfaces of the blades, thereby propelling the fluid axially. Axial-flow pumps primarily consist of a propeller-shaped impeller and a guide pump casing. Common installation configurations include vertical, horizontal, inclined, and tubular. Submersible axial-flow pumps integrate the motor with the pump casing, allowing them to be directly submerged in water. This type of pump is particularly well-suited for high-flow, low-head applications (typically ≤20 meters). Typical applications include agricultural irrigation, urban drainage, industrial cooling water circulation, and water conservancy projects such as river management. Unlike centrifugal pumps, which rely on centrifugal force to displace water radially, axial-flow pumps achieve fluid transport by pushing water axially. Their uniform flow rate and compact design offer significant advantages in applications requiring efficient handling of large volumes of fluid.

[0003] An axial-flow pump consists of two key components: the impeller and the guide vanes. As the impeller rotates, it exerts axial thrust on the fluid, pushing it along the pump shaft. The guide vanes reduce the fluid velocity, converting some of the kinetic energy output by the impeller into pressure energy, thereby increasing the pump's head and eliminating the fluid's rotational motion as it exits the impeller, shifting it to a stable axial flow, reducing eddy current losses and improving pump efficiency. However, the water drawn from the impeller directly impacts the end face of the guide vanes at high speed, colliding with the subsequent water flow, resulting in kinetic energy loss and reducing pump efficiency.

[0004] When using axial flow pumps for river management, the reason why axial flow pumps are easily blocked is that there are too many aquatic plants in rivers and lakes. After the aquatic plants enter the axial flow pump, they are entangled on the impeller, causing the impeller speed to gradually decrease, the water flow rate to decrease, and finally stop working. Therefore, it is often necessary to stop the pump for cleaning.

[0005] The method commonly used in the existing technology is to install a filter screen at the water inlet of the axial flow pump. However, aquatic plants will be entangled in the filter screen and block the filter holes, resulting in a decrease in the water intake. After accumulating for a period of time, the aquatic plants and silt will completely block the filter screen, and the axial flow pump will be unable to take in water. It is still necessary to stop the pump and clean the filter screen. Therefore, the filter screen is not suitable for use in waters with more aquatic plants. Summary of the Invention

[0006] The purpose of the present invention is to provide an anti-blocking diversion axial flow pump, aiming to solve the problem in the prior art that the axial flow pump is easily entangled by aquatic plants and causes blockage, and at the same time the water flow hits the diversion member and causes the water kinetic energy loss.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions: The transmission gear of the present invention is a gear which is engaged with the gear of the transmission gear and the gear of the transmission gear is engaged with the gear of the transmission gear and the gear of the transmission gear is engaged with the gear of the transmission gear and the gear of the transmission gear is engaged with the gear of the transmission gear and the gear of the transmission gear is engaged with the gear of the transmission gear and the gear of the transmission gear is engaged with the gear of the transmission gear.

[0008] Through the above technical solution, when the axial flow pump is working, the water inlet of the shell is first placed underwater, the driving motor drives the first bevel gear to rotate, the first bevel gear drives the second bevel gear to rotate, the third bevel gear and the second bevel gear rotate synchronously, and the two fourth bevel gears rotate synchronously with the third bevel gear, but do not rotate on their own. Due to the gear meshing structure, the two fourth bevel gears drive the fifth gear to rotate. Through the above method, the rotating pipe and the rotating rod rotate synchronously, the impeller starts to rotate, and water is drawn into the shell to form a spiral water flow. After passing through the impeller, the spiral water flow collides with the guide member, causing the guide member to slow down or even stop rotating. At this time, the third bevel gear stops rotating, and the two fourth bevel gears rotate on the third bevel gear. The two fourth bevel gears drive The fifth gear rotates, the rotating rod still keeps rotating, and the impeller keeps rotating synchronously to pump water. At this time, the first blade is rotating, and the second blade slows down or even stops rotating, forming a speed difference between the first blade and the second blade. When a large amount of aquatic plants enter the shell and entangle on the impeller, the first blade and the second blade shear the aquatic plants to prevent the aquatic plants from entanglement and causing the impeller to get stuck. At the same time, the high-speed rotating water flow first contacts the low-speed rotating second blade, reducing the water flow rotation speed, and then contacts the guide member, reducing the direct impact backflow on the end face of the guide member and causing kinetic energy loss. Then the water flow is converted into axial water flow by the low-speed rotating guide member for lifting, reducing the kinetic energy loss during the water flow lifting process and improving the working efficiency of the axial flow pump.

[0009] The present invention is further configured as follows: the guide member includes a fixed portion and a plurality of guide blades arranged on the outer wall of the fixed portion, the impeller includes a driving blade, the rotation direction of the guide blade is opposite to the rotation direction of the driving blade, and the length of the first blade and the second blade are both greater than the width of the fixed portion.

[0010] Through the above technical solution, the high-speed rotating water flow first contacts the second blade rotating at a low speed, thereby reducing the rotation speed of the water flow. The length of the second blade is greater than the thickness of the fixed part, and the water flow will not directly collide with the end of the fixed part to flow back, thereby not colliding with the subsequent water flow to cause water flow turbulence and kinetic energy loss. Then, it contacts the guide member, reducing the direct impact backflow on the end face of the guide member to cause kinetic energy loss. After the spiral water flow is guided by the guide blade with the opposite rotation direction, it is converted into axial water flow. The kinetic energy of the water flow spiral is converted into pressure energy, and the lift is greater.

[0011] The present invention is further configured such that the side surfaces of the first blade and the second blade are both in an inwardly concave arc shape.

[0012] Through the above technical solution, a "()" shape will be formed between the first blade and the second blade, which will clamp the thicker water plants in the middle and then cut them off, preventing the water plants from sliding to the side, and making the water plant cutting function more stable.

[0013] The present invention is further configured as follows: mounting holes are provided on the first blade and the second blade, threaded holes are provided on the impeller and the rotating tube, fixing bolts are provided through the mounting holes, and one end of the fixing bolt passes through the mounting hole and is threadedly connected to the threaded hole.

[0014] Through the above technical solution, the first blade and the second blade are set as a detachable structure. When the first blade or the second blade is severely worn and it is difficult to cut aquatic plants, the fixing bolts can be loosened and the first blade and the second blade can be replaced.

[0015] The present invention is further configured such that the inner wall of the mounting hole is smooth.

[0016] With the above technical solution, it is easier and more labor-saving to pass the fixing bolt through the mounting hole.

[0017] The present invention is further configured such that the ratio of the length of the guide vane to the length of the drive vane is 2.4.

[0018] Through the above technical solution, if the ratio of the length of the guide vane to the length of the driving vane is too small, the guide vane flow channel will not expand enough and the fluid will not be sufficiently decelerated, resulting in reduced efficiency in converting kinetic energy into pressure energy; when the ratio of the length of the guide vane to the length of the driving vane is too large, the friction loss of the guide vane flow channel will increase significantly, especially under low flow conditions, the energy loss will be aggravated and the residual swirl will increase, resulting in outlet turbulence loss, so the ratio is controlled at 2.4 as the optimal value.

[0019] The present invention is further configured as follows: a sealing rubber ring is provided at the connection between the rotating tube and the shell.

[0020] The above technical solution can prevent the pumped water from entering the gear transmission structure and causing the gears to rust and age, thereby increasing the service life and stability of the equipment.

[0021] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention sets a first blade and a second blade. The first blade rotates at high speed following the impeller, and the second blade rotates at low speed following the rotating tube. In this way, a speed difference is formed between the first blade and the second blade. When aquatic plants are wrapped around the impeller, the aquatic plants will be clamped and cut off by the first blade and the second blade, which greatly reduces the probability of blockage caused by aquatic plants wrapping around the impeller, and achieves a technical effect of preventing blockage.

[0022] 2. The present invention sets the length of the first blade and the second blade to be greater than the width of the fixed part. The high-speed rotating water flow first contacts the low-speed rotating second blade, reducing the water flow rotation speed, and then contacts the guide member, reducing the direct impact backflow on the end face of the guide member causing kinetic energy loss. Then the water flow is converted into axial water flow by the low-speed rotating guide member for lifting, reducing the kinetic energy loss in the water flow lifting process, improving the working efficiency of the axial flow pump, and achieving the effect of diversion. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a schematic diagram of the overall structure of an anti-blocking and diverting axial flow pump according to an embodiment of the present invention; Figure 2 This is a partial structural diagram of an embodiment of an anti-blocking and diverting axial flow pump of the present invention; Figure 3 This is a cross-sectional view of an embodiment of an anti-blocking and diverting axial flow pump of the present invention; Figure 4 This is a structural diagram of an impeller and a flow guide member in an embodiment of an anti-blocking and flow-guiding axial flow pump of the present invention; Figure 5 It is a schematic diagram of the installation structure of the first blade in an embodiment of an anti-blocking and diverting axial flow pump of the present invention.

[0025] Description of the accompanying drawings: 1. Housing; 2. Driving motor; 3. First bevel gear; 4. Second bevel gear; 5. Third bevel gear; 6. Fourth bevel gear; 7. Fifth bevel gear; 8. Rotating tube; 9. Rotating rod; 10. Impeller; 10a. Driving blade; 11. Guide member; 11a. Fixing part; 11b. Guide blade; 12. First blade; 13. Second blade; 14. Mounting hole; 15. Threaded hole; 16. Fixing bolt. DETAILED DESCRIPTION

[0026] The technical solutions of the present invention will be described clearly and completely below with reference to the accompanying drawings and specific embodiments. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0027] The present invention provides an anti-blocking diversion axial flow pump, such as Figure 1 As shown, it includes a housing 1 , and a driving motor 2 is arranged above the housing 1 .

[0028] like Figure 2 As shown, the drive motor 2 is provided with a first bevel gear 3, and a second bevel gear 4 is provided below the first bevel gear 3. The first bevel gear 3 is meshed with the second bevel gear 4 and the axial direction is perpendicular. A third bevel gear 5 is coaxially provided above the second bevel gear 4, and two fourth bevel gears 6 are relatively provided on the third bevel gear 5. The two fourth bevel gears 6 are meshed with the third bevel gear 5. A fifth bevel gear 7 is coaxially provided above the third bevel gear 5, and the two fourth bevel gears 6 are meshed with the fifth bevel gear 7.

[0029] like Figure 3 As shown, a rotating tube 8 is coaxially provided at the bottom of the third bevel gear 5, and a sealing rubber ring is provided at the connection between the rotating tube 8 and the housing 1. A rotating rod 9 is coaxially provided at the bottom of the fifth bevel gear 7, and the rotating rod 9 is located in the rotating tube 8. An impeller 10 is provided on the rotating rod 9, and a flow guide 11 is provided on the rotating tube 8.

[0030] like Figure 4As shown, a plurality of first blades 12 are provided on one side of the impeller 10 close to the guide member 11, and a plurality of second blades 13 cooperating with the first blades 12 are provided at the bottom of the rotating tube 8. The guide member 11 includes a fixed portion 11a and a plurality of guide vanes 11b provided on the outer wall of the fixed portion 11a. The impeller 10 includes a driving vane 10a, and the rotation direction of the guide vane 11b is opposite to that of the driving vane 10a. The lengths of the first blade 12 and the second blade 13 are both greater than the width of the fixed portion 11a, and the ratio of the length of the guide vane 11b to the length of the driving vane 10a is 2.4.

[0031] like Figure 5 As shown, the side surfaces of the first blade 12 and the second blade 13 are both concave arc-shaped, and the first blade 12 and the second blade 13 are both provided with mounting holes 14, the inner walls of the mounting holes 14 are smooth, and the impeller 10 and the rotating tube 8 are both provided with threaded holes 15, and fixing bolts 16 are provided through the mounting holes 14, and one end of the fixing bolt 16 passes through the mounting hole 14 and is threadedly connected to the threaded hole 15.

[0032] The workflow of this embodiment is as follows: Install the axial flow pump, fix the drive motor 2 in a dry place near the water, extend the water inlet of the shell 1 underwater, fix the entire axial flow pump, and start running after the drive motor 2 is powered on. The drive motor 2 drives the first bevel gear 3 to rotate, and the first bevel gear 3 drives the second bevel gear 4 to rotate. The third bevel gear 5 and the second bevel gear 4 rotate synchronously, and the two fourth bevel gears 6 rotate synchronously with the third bevel gear 5. At this time, the fourth bevel gear 6 is stationary relative to the third bevel gear 5. Due to the gear meshing structure, the two fourth bevel gears 6 drive the fifth gear to rotate. In the above manner, the rotating tube 8 and the rotating rod 9 rotate synchronously, and the impeller 10 starts to rotate. The water is drawn into the shell 1 and forms a spiral water flow. After the spiral water flow passes through the impeller 10, the high-speed rotating water flow first contacts the second blade 13 rotating at a low speed, which reduces the rotation speed of the water flow. The length of the second blade 13 is greater than the thickness of the fixed part 11a. The water flow will not directly collide with the end of the fixed part 11a and return, so as not to collide with the subsequent water flow, causing water flow turbulence and kinetic energy loss. After the water flow passes through the second blade 13, it contacts the guide member 11 again. After being guided by the guide blade 11b with the opposite rotation direction, the spiral water flow is converted into axial water flow. The kinetic energy of the water flow spiral is converted into pressure energy, and the lift is greater.

[0033] At the same time, when the high-speed spiral water flow collides with the guide member 11, since the direction of rotation of the guide blade 11b is opposite to that of the driving blade 10a, the water flow impact will cause the rotation speed of the guide member 11 to slow down or even stop. At this time, the third bevel gear 5 stops rotating, and the two fourth bevel gears 6 rotate on the third bevel gear 5. The two fourth bevel gears 6 drive the fifth gear to rotate, the rotating rod still keeps rotating, and the impeller 10 keeps rotating synchronously to pump water. At this time, the first blade 12 is rotating, and the second blade 13 slows down or even stops rotating. The first blade 12 and the second blade 13 will form a significant speed difference when in use.

[0034] In waters with dense aquatic plants, when a large amount of aquatic plants enter the housing 1 and entangle on the impeller 10, the first blade 12 and the second blade 13 cut the aquatic plants to prevent the impeller 10 from getting stuck due to the entanglement of the aquatic plants.

[0035] The technical effects of this technical solution are as follows: For the axial flow pumps of the prior art, in areas with dense aquatic plants, the impeller 10 is easily stagnant due to the inhalation of a large amount of aquatic plants, and finally blocked and unable to work. However, the anti-blocking guide axial flow pump of the present technical solution has the water flow impacting the guide blade 11b, and the rotation speed of the guide member 11 slows down, causing the rotation speed of the rotating tube 8 to slow down or even stagnate, while the first blade 12 rotates at high speed following the impeller 10, and the second blade 13 rotates at low speed following the rotating tube 8, so that a speed difference is formed between the first blade 12 and the second blade 13. When aquatic plants are wrapped around the impeller 10, the aquatic plants will be clamped and cut off by the first blade 12 and the second blade 13, which greatly reduces the probability of aquatic plants wrapping around the impeller 10 and causing blockage. The chopped aquatic plants are sucked to the outside of the tube body along with the water flow, thereby achieving a technical effect of anti-blocking; in order to ensure the shearing effect, the first blade 12 and the second blade 13 should fit tightly during installation.

[0036] In the axial flow pump of the prior art, the water flow extracted by the water impeller 10 will directly hit the end surface of the fixed part 11a at high speed and rebound, and then collide with the subsequent water flow, causing kinetic energy loss and reducing the efficiency of the pump. However, the anti-blocking diversion axial flow pump in the present technical solution forms a high-speed rotating water flow, which will first contact the second blade 13 rotating at a low speed, reducing the rotation speed of the water flow, and then contact the guide member 11, reducing the direct impact backflow on the end surface of the guide member 11 and causing kinetic energy loss. Then the water flow is converted into axial water flow by the low-speed rotating guide member 11 for lifting, reducing the kinetic energy loss in the water flow lifting process, improving the working efficiency of the axial flow pump, and achieving the effect of diversion.

[0037] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0038] The above description is only a description of the preferred embodiments of the present invention and does not limit the scope of the present invention. Any changes and modifications made by ordinary technicians in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. An anti-blocking and diverting axial flow pump, characterized by: The invention comprises a housing (1), a driving motor (2) is arranged above the housing (1), a first bevel gear (3) is arranged on the driving motor (2), a second bevel gear (4) is arranged below the first bevel gear (3), the first bevel gear (3) and the second bevel gear (4) are meshed with each other and their axis directions are perpendicular, a third bevel gear (5) is coaxially arranged above the second bevel gear (4), two fourth bevel gears (6) are arranged opposite to each other on the third bevel gear (5), both of the two fourth bevel gears (6) are meshed with the third bevel gear (5), and a fifth bevel gear (7) is coaxially arranged above the third bevel gear (5). The two fourth bevel gears (6) are both meshed with the fifth bevel gear (7); a rotating tube (8) is coaxially provided at the bottom of the third bevel gear (5); a rotating rod (9) is coaxially provided at the bottom of the fifth bevel gear (7); the rotating rod (9) is located in the rotating tube (8); an impeller (10) is provided on the rotating rod (9); a flow guide (11) is provided on the rotating tube (8); a plurality of first blades (12) are provided on a side of the impeller (10) close to the flow guide (11); and a plurality of second blades (13) matching the first blades (12) are provided at the bottom of the rotating tube (8).

2. The anti-blocking and diverting axial flow pump according to claim 1, characterized in that: The guide member (11) comprises a fixed portion (11a) and a plurality of guide vanes (11b) arranged on the outer wall of the fixed portion (11a); the impeller (10) comprises a driving vane (10a); the rotation direction of the guide vane (11b) is opposite to that of the driving vane (10a); and the lengths of the first blade (12) and the second blade (13) are both greater than the width of the fixed portion (11a).

3. The anti-blocking and diverting axial flow pump according to claim 2, characterized in that: The side surfaces of the first blade (12) and the second blade (13) are both in the shape of an inwardly concave arc.

4. The anti-blocking and diverting axial flow pump according to claim 3, characterized in that: The first blade (12) and the second blade (13) are both provided with mounting holes (14), the impeller (10) and the rotating tube (8) are both provided with threaded holes (15), a fixing bolt (16) is provided through the mounting hole (14), and one end of the fixing bolt (16) passes through the mounting hole (14) and is threadedly connected to the threaded hole (15).

5. The anti-blocking and diverting axial flow pump according to claim 4, characterized in that: The inner wall of the mounting hole (14) is smooth.

6. The anti-blocking and diverting axial flow pump according to claim 2, characterized in that: The ratio of the length of the guide vane (11b) to the length of the driving vane (10a) is 2.

4.

7. The anti-blocking and diverting axial flow pump according to claim 1, characterized in that: A sealing rubber ring is provided at the connection between the rotating tube (8) and the housing (1).

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