Self-cleaning axial flow pump

Abstract

The present application relates to the technical field of axial flow pumps, and particularly relates to a self-cleaning axial flow pump. The self-cleaning axial flow pump comprises a water guide shell, a fixed shell and a first bolt frame are fixedly connected to the upper side of the water guide shell, the first bolt frame is fixedly connected with the fixed shell, a rotating shell is rotatably connected to the first bolt frame, a driving motor is fixedly connected to the water guide shell, the water guide shell and the fixed shell are rotatably connected with a rotating shaft, and the rotating shaft is fixedly connected with an impeller at one end in the water guide shell. The present application is aimed at the problem that the eccentric rotation of the impeller caused by unbalanced load or poor assembly further causes the collision between the impeller and the pump body and causes damage, and proposes a design combining real-time monitoring and split connection. The design forms an active connection between the impeller and the power source, and when the monitoring system detects the abnormality of the impeller, the connection between the two is automatically disconnected, so that the potential damage of the impeller and other key components is effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of axial flow pump technology, and more particularly to a self-cleaning axial flow pump. Background Technology

[0002] Axial flow pumps are mechanical devices used to transport liquids. They are suitable for applications with large flow rates and low head. Because they can efficiently transfer large amounts of liquid from one location to another while maintaining low energy consumption, they are widely used in agricultural irrigation, urban drainage systems, industrial cooling water circulation, and sewage treatment.

[0003] Axial flow pumps are mainly composed of pump body, power source, impeller, bearings and seals. Their working principle is as follows: the power source drives the impeller to rotate, and the impeller applies force to the liquid entering the pump body, forcing the liquid to move faster along the central axis of the pump body and be discharged through the outlet of the pump body. At the same time, the rotation of the impeller creates a negative pressure zone at the liquid inlet of the pump body, attracting liquid to continuously replenish it, thereby completing the continuous liquid transfer process.

[0004] However, during use, the impeller may generate significant vibration and noise due to factors such as unbalanced load (impeller damage or debris entanglement) or poor assembly. This not only affects working efficiency but may also cause the impeller to rotate eccentrically, resulting in the impeller colliding with the inner wall of the pump body and causing irreversible damage. Summary of the Invention

[0005] To address the shortcomings mentioned in the background section, the present invention provides a self-cleaning axial flow pump.

[0006] The technical solution of the present invention is a self-cleaning axial flow pump, comprising:

[0007] A water guide shell, wherein a fixed shell and a first bolt bracket are fixedly connected to the upper side of the water guide shell, and the first bolt bracket is fixedly connected to the fixed shell;

[0008] The rotating housing is rotatably connected to the first bolt bracket;

[0009] A drive motor is fixedly connected to the water guide shell, and the output end of the drive motor is fixedly connected to the rotating shell. The water guide shell and the fixed shell are rotatably connected to a rotating shaft, and an impeller is fixedly connected to one end of the rotating shaft.

[0010] A sliding shell is slidably connected inside the rotating shell. The sliding shell is slidably connected with uniformly distributed first limiting members. The rotating shaft is fixedly connected with second limiting members of the same number as the first limiting members and in a uniform distribution. The first limiting members are used to establish power transmission between the rotating shaft and the sliding shell.

[0011] A self-cleaning component is mounted on the water guide shell and is used to clean the impeller;

[0012] A limiting component, disposed on the first bolt bracket, is used to limit the position of the sliding shell.

[0013] Furthermore, the self-cleaning component includes:

[0014] A connecting shell is fixedly attached to the side of the water guide shell near the impeller. A nozzle is fixedly attached to the connecting shell for cleaning the impeller. A baffle plate is detachably connected between the water guide shell and the connecting shell.

[0015] Furthermore, the limiting component includes:

[0016] The first liquid delivery housing is fixedly connected to the first bolt bracket;

[0017] A liquid-containing shell is fixedly connected to the rotating shell. The first liquid-feeding shell is rotatably connected and communicates with the liquid-containing shell. A locking member is slidably connected inside the liquid-containing shell. A first tension spring is fixedly connected between the sliding shell and the rotating shell. A spring is fixedly connected between the first limiting member and the sliding shell. A second tension spring is fixedly connected between the locking member and the liquid-containing shell. The locking member is used to limit the sliding shell.

[0018] A monitoring component is installed inside the water guide shell on the side near the impeller to monitor the rotational state of the shaft.

[0019] Furthermore, the monitoring component includes:

[0020] The second bolt bracket is fixed inside the water guide shell on the side near the impeller;

[0021] The second liquid delivery shell is fixedly connected to the second bolt bracket. The second liquid delivery shell has evenly distributed L-shaped cavities. The second liquid delivery shell is slidably connected to evenly distributed second sealing elements. A third tension spring is fixedly connected between the second sealing elements and the second liquid delivery shell. The second sealing elements are located in the L-shaped cavities. The opposing sides of the evenly distributed second sealing elements are jointly fixedly connected to a first limiting ring. The rotating shaft passes through the first limiting ring, and the inner diameter of the rotating shaft is larger than the diameter of the first limiting ring.

[0022] Furthermore, the second liquid delivery shell is fixedly connected to and communicates with the first liquid delivery shell through a liquid delivery pipe. The liquid holding shell is provided with a connected cylindrical groove and an L-shaped groove. The liquid holding shell is slidably connected to a first sealing member. The first sealing member is used to limit the locking member. The side of the first sealing member away from the locking member is located in the cylindrical groove of the liquid holding shell.

[0023] Furthermore, the central axis of the first seal is perpendicular to the central axis of the locking member, and the center line of the first seal is parallel to the center line of the sliding shell.

[0024] Furthermore, the second liquid delivery shell is fixed with uniformly distributed second limiting rings, which are used to limit the adjacent second sealing elements. The second limiting rings are located in the L-shaped cavity, and a one-way valve is provided in the L-shaped cavity.

[0025] Furthermore, a sliding ring is provided inside the rotating shell, and a fourth tension spring is fixedly connected between the sliding ring and the sliding shell. The sliding ring is fixedly connected with pins that are evenly distributed and have the same number as the first limiting member. The first limiting member is provided with a limiting groove, and the pins limit the first limiting member through the limiting groove on the first limiting member.

[0026] Furthermore, gaps are left between the opposing sides of the first limiting member and the sliding shell, and inclined surfaces are provided on the inner sides of both the first and second limiting members.

[0027] Furthermore, a soft pad is fixed to the side of the first limiting member near the axis of the sliding shell to prevent the first limiting member from having a hard collision with the adjacent second limiting member.

[0028] The beneficial effects of the present invention are as follows: The present invention addresses the problem of eccentric rotation of the impeller caused by unbalanced load or poor assembly, which leads to collision between the impeller and the pump body and causes damage. It proposes a design that combines real-time monitoring and a split connection. This design enables an active connection between the impeller and the power source, and automatically disconnects the connection when the monitoring system detects an impeller abnormality, thereby effectively avoiding potential damage to the impeller and other key components.

[0029] This invention uses a nozzle installed on the pump body. When cleaning the impeller is required, the nozzle automatically sprays cleaning fluid to wet the impeller and enhances the cleaning efficiency in conjunction with the rotation of the impeller. When cleaning the impeller is not required, the impeller and the nozzle are separated to protect the nozzle.

[0030] To address the problems of pump performance degradation, equipment damage, and safety hazards caused by impeller reversal due to reversed circuit connections, this invention proposes an innovative split-type connection method. When the rotation direction of the power source is opposite to the normal rotation direction of the impeller, the power transmission between the power source and the impeller is automatically cut off, thereby ensuring the normal operation of the axial flow pump and extending its service life. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0032] Figure 2 This is a three-dimensional structural cross-sectional view of the present invention;

[0033] Figure 3 This is a three-dimensional structural cross-sectional view of the water-guiding shell of the present invention;

[0034] Figure 4 This is a three-dimensional structural cross-sectional view of the fixing shell of the present invention;

[0035] Figure 5 This is a three-dimensional structural cross-sectional view of the rotating shell of the present invention;

[0036] Figure 6 This is a three-dimensional structural cross-sectional view of the sliding shell of the present invention;

[0037] Figure 7 This is a three-dimensional structural diagram of the first limiting member and the second limiting member of the present invention when they are connected.

[0038] Figure 8 This is a three-dimensional structural diagram of the locking member and the first sealing member of the present invention;

[0039] Figure 9 This is a three-dimensional structural diagram of the present invention when the first limiting member and the second limiting member are not connected;

[0040] Figure 10 This is a three-dimensional structural cross-sectional view of the connecting shell of the present invention;

[0041] Figure 11 This is a three-dimensional structural cross-sectional view of the second liquid delivery shell of the present invention.

[0042] In the diagram: 1-Water guide shell, 2-Fixed shell, 3-First bolt bracket, 4-Rotating shell, 5-Drive motor, 6-Rotating shaft, 7-Impeller, 8-Sliding shell, 9-First limiting component, 10-Second limiting component, 101-First liquid delivery shell, 11-Liquid holding shell, 12-Locking component, 121-First sealing component, 13-Connecting shell, 14-Nozzle, 15-Second bolt bracket, 16-Second liquid delivery shell, 17-L-shaped cavity, 18-Second sealing component, 19-First limiting ring, 20-Second limiting ring, 21-Sliding ring, 22-Pin. Detailed Implementation

[0043] Although the invention may be described with respect to specific applications or industries, those skilled in the art will recognize its broader applicability. Those skilled in the art will understand that terms such as "upper," "lower," "upward," "downward," etc., are used to describe the drawings and not to indicate a limitation on the scope of the invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and not intended to limit the scope of the invention in any way.

[0044] This invention aims to solve the problem of eccentric rotation caused by unbalanced impeller load or poor assembly, which leads to collision between the impeller and the pump body and causes damage. It proposes a method that combines real-time monitoring with a split connection to achieve an active connection between the impeller and the power source. When the monitoring system detects an abnormality in the impeller, it can automatically disconnect the connection between the impeller and the power source, thereby effectively reducing potential damage to the impeller and other key components.

[0045] Example 1: A self-cleaning axial flow pump, such as Figures 1-11 As shown, it includes: a water guide shell 1, with a fixed shell 2 and a first bolt bracket 3 fixedly connected to the upper side of the water guide shell 1, the first bolt bracket 3 being fixedly connected to the fixed shell 2; a rotating shell 4, rotatably connected to the first bolt bracket 3; a drive motor 5, fixedly connected to the water guide shell 1, the output end of the drive motor 5 being fixedly connected to the rotating shell 4; a rotating shaft 6 rotatably connected to both the water guide shell 1 and the fixed shell 2, with an impeller 7 fixedly connected to one end of the rotating shaft 6 located inside the water guide shell 1; a sliding shell 8, slidably connected inside the rotating shell 4, with a first tension spring fixedly connected between the sliding shell 8 and the rotating shell 4; a sliding shell 8 slidably connected to uniformly distributed first limiting members 9, with a spring fixedly connected between the first limiting members 9 and the sliding shell 8; a rotating shaft 6 fixedly connected to second limiting members 10, the same number as the first limiting members 9 and evenly distributed, the first limiting members 9 being used to establish the connection between the rotating shaft 6 and the sliding shell 8; a self-cleaning assembly, disposed on the water guide shell 1, used to clean the impeller 7; and a limiting assembly, disposed on the first bolt bracket 3, used to limit the position of the sliding shell 8.

[0046] In the above scheme, a one-way bearing is provided inside the fixed shell 2 to allow the rotating shaft 6 to rotate smoothly. The axis of the rotating shaft 6 coincides with the axis of the output end of the drive motor 5. The drive motor 5 is electrically connected to the remote control terminal. A sliding groove is provided inside the rotating shell 4 to guide the sliding shell 8. When the upper side of the sliding groove inside the rotating shell 4 is in contact with the upper side of the sliding shell 8, the first tension spring between the sliding shell 8 and the rotating shell 4 is in a stretched state. The first limiting member 9 and the second limiting member 10 are both hook-shaped, and both can be made of materials with high hardness and light weight, such as aluminum alloy, titanium alloy, and magnesium alloy. When the impeller 7 rotates eccentrically, the sliding shell 8 drives all the first limiting members 9 to move downward under the action of the first tension spring, so that the first limiting member 9 is disengaged from the contact with the adjacent second limiting member 10, and actively disconnects the power transmission of the drive motor 5.

[0047] like Figures 5-7 As shown, the self-cleaning assembly includes: a connecting shell 13, which is fixed to the side of the water guide shell 1 near the impeller 7; a nozzle 14 is fixed to the connecting shell 13; the nozzle 14 is used to clean the impeller 7; and a baffle plate is detachably connected between the water guide shell 1 and the connecting shell 13.

[0048] In the above scheme, when it is not necessary to clean the impeller 7, the baffles on the water guide shell 1 and the connecting shell 13 separate the impeller 7 and the nozzle 14 to protect the nozzle 14. The inner diameter of the baffle on the lower side of the water guide shell 1 is the same as the inner diameter of the water guide shell 1, and the number of nozzles 14 can be adjusted according to the actual situation.

[0049] like Figures 5-7 As shown, the limiting assembly includes: a first liquid delivery shell 101, fixedly connected to the first bolt bracket 3; a liquid holding shell 11, fixedly connected to the rotating shell 4, the first liquid delivery shell 101 and the liquid holding shell 11 are rotatably connected and communicate with each other, a locking member 12 is slidably connected inside the liquid holding shell 11, a second tension spring is fixedly connected between the locking member 12 and the liquid holding shell 11, and the locking member 12 is used to limit the sliding shell 8; a monitoring assembly is set inside the water guide shell 1 on the side near the impeller 7, and is used to monitor the rotation status of the rotating shaft 6.

[0050] In the above scheme, to prevent the liquid container 11 from rotating eccentrically, the same part can be installed again at the mirror position of the liquid container 11 and the locking part 12, depending on the actual situation. The locking part 12 can be made of a material with high hardness and light weight, such as aluminum alloy, titanium alloy, or magnesium alloy. The locking part 12 is in the shape of... Figure 5 When in the middle state, the second spring of the locking member 12 is in a stretched state.

[0051] like Figure 10 and Figure 11 As shown, the monitoring component includes: a second bolt bracket 15, fixedly connected to the water guide shell 1 on the side near the impeller 7; a second liquid delivery shell 16, fixedly connected to the second bolt bracket 15, with uniformly distributed L-shaped cavities 17 provided inside the second liquid delivery shell 16, and uniformly distributed second sealing elements 18 slidably connected to the second liquid delivery shell 16. A third tension spring is fixedly connected between the second sealing elements 18 and the second liquid delivery shell 16. The second sealing elements 18 are located inside the L-shaped cavities 17, and a first limiting ring 19 is fixedly connected to the opposing sides of the uniformly distributed second sealing elements 18. The rotating shaft 6 passes through the first limiting ring 19, and the inner diameter of the rotating shaft 6 is larger than the diameter of the first limiting ring 19.

[0052] In the above scheme, the first limiting ring 19 is made of deformable material, the L-shaped cavity 17 is located in the lower part of the second liquid delivery shell 16, the back side of the evenly distributed second sealing member 18 is in a sealing sliding connection with the second liquid delivery shell 16, and the opposite side of the evenly distributed second sealing member 18 is not in a sealing sliding connection with the second liquid delivery shell 16. The axis of the first limiting ring 19 coincides with the axis of the rotating shaft 6.

[0053] like Figure 7 and Figure 8As shown, the second liquid delivery shell 16 is fixedly connected to the first liquid delivery shell 101 and connected by a liquid delivery pipe. The liquid holding shell 11 is provided with a cylindrical groove and an L-shaped groove that are connected. The liquid holding shell 11 is slidably connected to a first sealing member 121. The first sealing member 121 is used to limit the locking member 12. One side of the upper side of the first sealing member 121 is located in the cylindrical groove of the liquid holding shell 11. The central axis of the first sealing member 121 is perpendicular to the central axis of the locking member 12. The center line of the first sealing member 121 is parallel to the center line of the sliding shell 8. The liquid holding shell 11 is provided with an exhaust hole that communicates with the cylindrical groove inside it.

[0054] In the above scheme, in order to prevent the liquid holding shell 11 from rotating eccentrically, the same parts can be installed again at the mirror position of the liquid holding shell 11 and the first seal 121 according to the actual situation. When the first seal 121 is inserted into the locking member 12, the locking member 12 is limited to prevent the locking member 12 from sliding freely due to the centrifugal force when the sliding shell 8 rotates. Hydraulic oil is stored in the first liquid delivery shell 101, the liquid delivery pipe, the L-shaped cavity 17 (the hydraulic oil in the L-shaped cavity 17 is on the side of the second seal 18 facing away from the rotating shaft 6), the lower side of the cylindrical groove of the first seal 121 and the L-shaped groove.

[0055] like Figure 11 As shown, the second liquid delivery shell 16 is fixed with a uniformly distributed second limiting ring 20. The second limiting ring 20 is used to limit the adjacent second sealing element 18. The second limiting ring 20 is located in the L-shaped cavity 17, and a one-way valve is provided in the L-shaped cavity 17.

[0056] In the above scheme, the second limiting ring 20 is used to limit the maximum movement distance of the adjacent second seal 18. When the second seal 18 does not slide along the adjacent L-shaped cavity 17, the pressure of the hydraulic oil in the L-shaped cavity 17 will not change. At this time, the one-way valve in the L-shaped cavity 17 does not work. When the second seal 18 slides along the adjacent L-shaped cavity 17, the pressure of the hydraulic oil in the L-shaped cavity 17 increases. At this time, the one-way valve in the L-shaped cavity 17 is in the open state. The purpose of the one-way valve in the L-shaped cavity 17 is that hydraulic oil can only be discharged from the L-shaped cavity 17, and hydraulic oil cannot enter other L-shaped cavities 17.

[0057] Working principle: When this device is needed to transport liquid, the operator connects the drain pipe and the pumping pipe to the upper and lower sides of the water guide shell 1 respectively, thus completing the preparation work before transporting the liquid.

[0058] After completing the preparations for liquid delivery, the staff starts the drive motor 5 through the control terminal. The output of the drive motor 5 drives the rotating shell 4 and the liquid holding shell 11 to rotate counterclockwise (viewed from top to bottom, and the liquid holding shell 11 rotates along the first liquid delivery shell 101 during the rotation). The rotating shell 4 drives all the first limiting members 9 to rotate synchronously through the sliding shell 8 on it (at this time, the inclined surface of the first limiting member 9 is in contact with the inclined surface of the adjacent second limiting member 10). The first limiting member 9 then drives the adjacent second limiting member 10 to rotate synchronously. The second limiting member 10 drives the rotating shaft 6 to rotate, so that the rotating shaft 6 drives the impeller 7 to rotate inside the water guide shell 1, thereby drawing the liquid from the lower side of the water guide shell 1.

[0059] During liquid transport, the impeller 7 experiences uneven mass due to unbalanced loads, poor assembly, and varying degrees of wear on its components over time. This uneven mass leads to eccentric rotation, causing the central axes of the impeller 7 and shaft 6 to deviate from the central axis of the water guide shell 1. This results in eccentric vibration of the lower side of shaft 6 and impeller 7. During this eccentric vibration, shaft 6 circumferentially compresses the first limiting ring 19, which in turn compresses the adjacent second seal 18. This causes the second seal 18 to move away from shaft 6 and stretch the adjacent third tension spring. As the second seal 18 moves, it moves along the adjacent... The L-shaped cavity 17 moves and squeezes the hydraulic oil in the adjacent L-shaped cavity 17, increasing its internal pressure. This causes the hydraulic oil in the adjacent L-shaped cavity 17 to open the adjacent one-way valve and enter the upper side of the second liquid delivery shell 16. The second liquid delivery shell 16 then delivers the hydraulic oil through its delivery pipe to the first liquid delivery shell 101. The first liquid delivery shell 101 then delivers the hydraulic oil through the L-shaped groove in the liquid holding shell 11 to the cylindrical groove. This increases the pressure in the cylindrical groove of the liquid holding shell 11 and causes the first seal 121 to move upward. (During the upward movement of the first seal 121, the gas on the upper side of the cylindrical groove of the liquid holding shell 11 is discharged through the exhaust hole on the left side of the liquid holding shell 11.)

[0060] When the first seal 121 moves upward and disengages from the locking member 12, the locking member 12 moves to the left under the action of the second tension spring, causing the locking member 12 to gradually disengage from the limiting position on the sliding shell 8.

[0061] When the locking member 12 disengages from the sliding shell 8, the sliding shell 8, under the action of the first tension spring on its lower side, drives all the first limiting members 9 on it to move downward (as the first limiting members 9 move downward, they gradually disengage from the contact with the adjacent second limiting members 10). When all the first limiting members 9 have moved to the point where they no longer contact all the second limiting members 10, the power transmission between the drive motor 5 and the rotating shaft 6 is disconnected, so as to achieve the effect of emergency disconnection and prevent the impeller 7 from continuing to operate under abnormal conditions, thereby causing abnormal damage to the impeller 7 and other components.

[0062] After the power transmission of impeller 7 was lost, the staff stopped the operation of drive motor 5 through the control terminal, and then repaired or replaced the abnormal parts.

[0063] After the faulty parts have been repaired or replaced, the workers pull the sliding shell 8 and its associated parts upwards (the first tension spring is stretched during the upward movement of the sliding shell 8, putting it in a stretched state). When the sliding shell 8 moves all the first limiting parts 9 to be in contact with the adjacent second limiting parts 10, they will be in close contact. Figure 7 After the lock is in the correct position, the operator presses the locking member 12, causing the locking member 12 to move towards the rotating shaft 6 and then back to the lower side of the sliding shell 8 (the locking member 12 stops moving after it is limited by the first seal 121), thereby restoring the limitation on the sliding shell 8.

[0064] After the sliding shell 8 is restored to its limit, the operator inserts a tool into the corresponding L-shaped cavity 17 in the second liquid delivery shell 16 (i.e., the L-shaped cavity 17 where the second seal 18 is squeezed due to the eccentricity of the rotating shaft 6), and manually opens the one-way valve in the L-shaped cavity 17. Under the action of the third tension spring adjacent to the second seal 18, it moves and resets in the direction of the rotating shaft 6. At that time, the hydraulic oil in the second liquid delivery shell 16 flows to the lower side of the L-shaped cavity 17 through the manually opened one-way valve. After the hydraulic oil enters the L-shaped cavity 17, the pressure in the second liquid delivery shell 16 immediately decreases. Under the action of the pressure decrease, a negative pressure is generated, thereby causing the hydraulic oil in the cylindrical groove in the liquid holding shell 11 to flow back to the first liquid delivery shell 101 through the L-shaped groove on it, and then back to the second liquid delivery shell 16 through the liquid delivery pipe on the first liquid delivery shell 101. After the pressure in the cylindrical groove in the liquid holding shell 11 decreases, the first seal 121 is re-inserted into the locking member 12 to restore the limit on the locking member 12.

[0065] When it is necessary to clean the impeller 7, the staff first pulls out the baffle plate on the lower side of the water guide shell 1, exposing the nozzle 14 inside the water guide shell 1. Then, the water pipe is connected to the side of the nozzle 14 away from the water guide shell 1, and the cleaning fluid is supplied to the nozzle 14 through the water pipe and then sprayed out by the nozzle 14. At this time, the staff controls the drive motor 5 to rotate slowly through the control terminal. The drive motor 5 drives the rotating shaft 6 to rotate through the transmission of the rotating shell 4 and its auxiliary parts. The rotating shaft 6 drives the impeller 7 to rotate synchronously, so that the impeller 7 contacts the cleaning fluid sprayed out by the nozzle 14 in a rotating state, thereby realizing the self-cleaning of the impeller 7.

[0066] After the impeller 7 is cleaned, the output end of the drive motor 5 gradually stops rotating, and then the staff reinserts the baffle plate into the water guide shell 1.

[0067] When using an axial flow pump for liquid transfer, if the circuit is accidentally reversed, the impeller will rotate in the opposite direction, preventing the pump from drawing liquid normally. This can cause delays in operation or, in severe cases, additional stress on the bearings (the bearings of axial flow pumps typically rotate in one direction). To avoid this, this invention uses a split-connection design. When the rotation direction of the power source is opposite to the normal rotation direction of the impeller, the connection between the power source and the impeller is automatically disconnected. This not only effectively prevents the negative impact of impeller reversal but also ensures the normal operation of the axial flow pump and the long-term reliability of the equipment.

[0068] Example 2: Based on Example 1, such as Figures 5-7 and Figure 9 As shown, a sliding ring 21 is provided inside the rotating shell 4. A fourth tension spring is fixed between the sliding ring 21 and the sliding shell 8. The sliding ring 21 is fixed with evenly distributed pins 22, which are the same number as the first limiting members 9. The first limiting member 9 is provided with a limiting groove. The pins 22 limit the first limiting member 9 through the limiting groove. There are gaps between the opposing sides of the evenly distributed first limiting members 9 and the sliding shell 8. The inner sides of the first limiting member 9 and the second limiting member 10 are both provided with inclined surfaces. A soft pad is fixed to the side of the first limiting member 9 near the axis of the sliding shell 8 to prevent the first limiting member 9 from having a hard collision with the adjacent second limiting member 10. The tension provided by the fourth tension spring on the lower side of the sliding ring 21 is greater than the sum of the supporting forces provided by all the springs on the first limiting members 9.

[0069] In the above scheme, when the upper side of the pin 22 is in contact with the upper side of the first limiting member 9, the fourth tension spring of the sliding ring 21 is in a stretched state, the lower side of the pin 22 matches the shape of the upper limit groove of the first limiting member 9, and gaps are left between the opposing sides of the evenly distributed first limiting members 9 and the sliding shell 8 to provide space for the evenly distributed first limiting members 9 to move in opposite directions.

[0070] Working principle: When the drive motor 5 rotates clockwise due to reversed circuit connection, the output end of the drive motor 5 drives the sliding shell 8 and all the first limiting members 9 to rotate clockwise through the rotating shell 4 (clockwise when viewed from top to bottom). When the force of the rotation of all the first limiting members 9 driven by the sliding shell 8 exceeds the supporting force given to the first limiting members 9 by the adjacent springs inside the sliding shell 8, the inclined surface of the first limiting member 9 is squeezed by the inclined surface of the second limiting member 10, and the first limiting member 9 moves to the side closer to the second limiting member 10 (the adjacent springs are stretched during the movement of the first limiting member 9).

[0071] When the sliding shell 8 drives all the first limiting members 9 to rotate and they no longer contact the second limiting member 10, the first limiting member 9 separates from the adjacent second limiting member 10. At this point, the sliding shell 8 drives all the first limiting members 9 to rotate independently, thereby achieving the effect of disconnecting the power transmission.

[0072] When the sliding shell 8 rotates all the first limiting members 9 until the soft pad on the first limiting member 9 contacts the adjacent second limiting member 10 (the soft pad provides cushioning), the first limiting member 9 is squeezed by the adjacent second limiting member 10, causing the first limiting member 9 to move away from the second limiting member 10. The first limiting member 9 moves to... Figure 8 After reaching the desired state, the sliding ring 21, under the action of the fourth tension spring, drives all the pins 22 downward, causing the pins 22 to be inserted into the limiting grooves on the adjacent first limiting members 9 respectively. Under the tension provided by the fourth tension spring of the sliding ring 21, the sliding ring 21 drives all the pins 22 to be inserted into the limiting grooves on the adjacent first limiting members 9 respectively. During the process of the pins 22 being inserted into the limiting grooves on the adjacent first limiting members 9, the first limiting members 9 continue to move away from the second limiting members 10 until the pins 22 are completely inserted into the limiting grooves on the adjacent first limiting members 9. At this time, there is a distance between the opposing sides of all the first limiting members 9 and the opposing sides of all the second limiting members 10, in order to prevent all the first limiting members 9 from rotating again to repeatedly contact the adjacent second limiting members 10, causing them to be affected to different degrees.

[0073] When the staff discovered that the wiring was reversed, they disconnected the electrical connection of the drive motor 5 via the control terminal and then reconnected the wiring correctly. After the wiring was reconnected, the staff pulled the sliding ring 21 upward, causing the sliding ring 21 to move all the pins 22 upward and stretch the fourth tension spring (the fourth tension spring returns to its stretched state). After the pins 22 moved upward until they no longer contacted the limiting groove of the adjacent first limiting member 9, the first limiting member 9 moved back to its original position under the action of the adjacent spring. Then the staff released the sliding ring 21, and the sliding ring 21 applied a squeezing force to the pins 22 under the action of the fourth tension spring, so that the lower side of the pins 22 was in contact with the upper side of the adjacent first limiting member 9.

[0074] After all the first limiting members 9 have been reset, the worker pulls all the first limiting members 9 inward so that the inclined surfaces of all the first limiting members 9 are respectively in contact with the inclined surfaces of the adjacent second limiting members 10, that is... Figure 7 The state in.

[0075] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A self-cleaning axial flow pump, characterized by, The utility model provides a kind of water conservancy shell (1), the upper side of the water conservancy shell (1) is fixed with fixed shell (2) and first bolt frame (3), and the first bolt frame (3) is fixed with the fixed shell (2);Rotary shell (4) is rotatably connected to the first bolt frame (3);Drive motor (5) is fixed in the water conservancy shell (1), and the output end of the drive motor (5) is fixed with the rotary shell (4), and the water conservancy shell (1) and the fixed shell (2) are rotatably connected with rotating shaft (6), and one end of the rotating shaft (6) is fixed with impeller (7);Sliding shell (8) is slidably connected in the rotary shell (4), and the sliding shell (8) is slidably connected with uniformly distributed first limiting part (9), and the rotating shaft (6) is fixed with second limiting part (10) consistent with the number and evenly distributed with the first limiting part (9), and the first limiting part (9) is used to establish the power transmission between the rotating shaft (6) and the sliding shell (8);Self-cleaning assembly is arranged on the water conservancy shell (1), for cleaning the impeller (7);Limiting assembly is arranged on the first bolt frame (3), for limiting the position of the sliding shell (8);The limiting assembly comprises: first liquid feeding shell (101) is fixed to the first bolt frame (3);Liquid containing shell (11) is fixed to the rotary shell (4), and the first liquid feeding shell (101) is rotatably connected with the liquid containing shell (11) and is communicated, and the liquid containing shell (11) is slidably connected with locking member (12) in seal, and first tension spring is fixed between the sliding shell (8) and the rotary shell (4), and spring is fixed between the first limiting part (9) and the sliding shell (8), and second tension spring is fixed between the locking member (12) and the liquid containing shell (11), and the locking member (12) is used to limit the sliding shell (8);Monitoring assembly is arranged on the side of the water conservancy shell (1) close to the impeller (7) in the water conservancy shell (1), for monitoring the rotating state of the rotating shaft (6);The monitoring assembly comprises: second bolt frame (15) is fixed to the side of the water conservancy shell (1) close to the impeller (7);Second liquid feeding shell (16) is fixed to the second bolt frame (15), and the second liquid feeding shell (16) is provided with evenly distributed L-shaped cavity (17) in it, and the second liquid feeding shell (16) is slidably connected with evenly distributed second sealing element (18), and third tension spring is fixed between the second sealing element (18) and the second liquid feeding shell (16), and the second sealing element (18) is located in the L-shaped cavity (17), and the opposite sides of evenly distributed second sealing element (18) are commonly fixed with first limiting ring (19), and the rotating shaft (6) passes through the first limiting ring (19), and the inner diameter of the rotating shaft (6) is greater than the diameter of the first limiting ring (19).The self-cleaning assembly comprises: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The self-cleaning axial flow pump according to claim 1, wherein, ​ A connecting shell (13) is fixed to the water guide shell (1) near the impeller (7), and a spray head (14) is fixed to the connecting shell (13) for cleaning the impeller (7), and a shielding plate is detachably connected between the water guide shell (1) and the connecting shell (13).

3. The self-cleaning axial flow pump according to claim 2, characterized in that: The second liquid feeding shell (16) is fixed and communicated with the first liquid feeding shell (101), the liquid containing shell (11) is provided with a cylindrical groove and an L-shaped groove in communication, the first sealing piece (121) is slidably connected to the liquid containing shell (11), and the first sealing piece (121) is used for limiting the locking piece (12), and the side, away from the locking piece (12), of the first sealing piece (121) is located in the cylindrical groove of the liquid containing shell (11).

4. The self-cleaning axial flow pump according to claim 3, characterized in that: The central axis of the first sealing piece (121) is perpendicular to the central axis of the locking piece (12), and the center line of the first sealing piece (121) is parallel to the center line of the sliding shell (8).

5. A self-cleaning axial flow pump according to claim 4, wherein: The second liquid feeding shell (16) is fixed with uniformly distributed second limiting rings (20), the second limiting rings (20) are used for limiting adjacent second sealing pieces (18), the second limiting rings (20) are located in the L-shaped cavity (17), and the L-shaped cavity (17) is provided with a one-way valve.

6. The self-cleaning axial flow pump according to claim 5, wherein: The rotating shell (4) is provided with a sliding ring (21), the fourth tension spring is fixed between the sliding ring (21) and the sliding shell (8), the sliding ring (21) is fixed with uniformly distributed and consistent number of the first limiting pieces (9) of the first limiting pieces (9), the first limiting pieces (9) are provided with limiting grooves, and the first limiting pieces (9) are limited by the limiting grooves on the first limiting pieces (9).

7. A self-cleaning axial flow pump according to claim 6, characterized in that: The opposite sides of the first limiting pieces (9) are uniformly distributed and have gaps between the sliding shell (8), and the inner sides of the first limiting pieces (9) and the second limiting pieces (10) are provided with inclined surfaces.

8. The self-cleaning axial flow pump according to claim 7, characterized in that: The first limiting pieces (9) are fixed with soft pads on the sides near the shaft center of the sliding shell (8), so as to prevent the first limiting pieces (9) from colliding with adjacent second limiting pieces (10) rigidly.

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