Self-cleaning axial flow pump

Abstract

The invention relates to the technical field of axial flow pumps, in particular to a self-cleaning type axial flow pump. Comprising a water guide shell, the upper side of the water guide shell is fixedly connected with a fixed shell and a first bolt frame, and the first bolt frame is fixedly connected with the fixed shell; the rotating shell is rotationally connected to the first bolt frame; and the driving motor is fixedly connected to the water guide shell, the water guide shell and the fixed shell are jointly and rotationally connected with a rotating shaft, and the end, located in the water guide shell, of the rotating shaft is fixedly connected with an impeller. In order to solve the problem that the impeller is damaged due to collision between the impeller and a pump body caused by eccentric rotation of the impeller due to unbalanced load or poor assembly, the design combining real-time monitoring and split type connection is provided, the impeller and a power source are movably connected through the design, and when a monitoring system detects that the impeller is abnormal, the impeller is connected with the power source. Therefore, potential damage to the impeller and other key components is effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of axial flow pumps, and in particular to a self-cleaning axial flow pump. Background Art

[0002] An axial flow pump is a mechanical device used to transport liquids. It is suitable for applications with large flow rates and low lifts. Because it can efficiently transfer large amounts of liquid from one location to another while maintaining low energy consumption, it is widely used in agricultural irrigation, urban drainage systems, industrial cooling water circulation, and sewage treatment.

[0003] The axial flow pump is mainly composed of a pump body, a power source, an impeller, bearings and seals. Its working principle is: the power source drives the impeller to rotate, and the impeller exerts force on the liquid entering the pump body, forcing the liquid to accelerate 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 forms a negative pressure area at the liquid inlet of the pump body, attracting liquid to be continuously replenished, thereby completing a continuous liquid transmission process.

[0004] However, during use, the impeller may produce large vibrations and noise due to factors such as unbalanced load (impeller damage or impeller entanglement) or poor assembly, which not only affects work efficiency, but may also cause eccentric rotation of the impeller, resulting in collision between the impeller and the inner wall of the pump body, causing irreversible damage. Summary of the invention

[0005] In order to solve the shortcomings mentioned in the above background technology, 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: A water guide shell, wherein a fixed shell and a first bolt frame are fixedly connected to the upper side of the water guide shell, and the first bolt frame is fixedly connected to the fixed shell; a rotating shell, rotatably connected to the first bolt bracket; A driving motor is fixedly connected to the water guide shell, an output end of the driving motor is fixedly connected to the rotating shell, the water guide shell and the fixed shell are connected to a rotating shaft for common rotation, and an impeller is fixedly connected to one end of the rotating shaft; A sliding shell is slidably connected in 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 which are the same in number and uniformly distributed as the first limiting members, and the first limiting members are used to establish power transmission between the rotating shaft and the sliding shell; A self-cleaning component, disposed on the water guide shell, for cleaning the impeller; A limiting assembly is arranged on the first bolt rack and is used to limit the position of the sliding shell.

[0007] Furthermore, the self-cleaning component comprises: A connecting shell is fixedly connected to a side of the water guide shell close to the impeller. A nozzle is fixedly connected to the connecting shell. The nozzle is used to clean the impeller. A shielding plate is detachably connected between the water guide shell and the connecting shell.

[0008] Furthermore, the limiting component includes: A first liquid delivery housing, fixedly connected to the first bolt frame; A liquid holding shell is fixedly connected to the rotating shell, the first liquid delivery shell is rotatably connected and communicated with the liquid holding shell, a locking member is sealingly and slidingly connected in the liquid holding 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 holding shell, and the locking member is used to limit the sliding shell; A monitoring component is arranged at one side of the water guide shell close to the impeller and is used to monitor the rotation state of the rotating shaft.

[0009] Furthermore, the monitoring component includes: A second bolt bracket is fixedly connected to a side of the water guide casing close to the impeller; The second liquid delivery shell is fixedly connected to the second bolt frame, and an evenly distributed L-shaped cavity is arranged in the second liquid delivery shell. The second liquid delivery shell is slidably connected with an evenly distributed second sealing member, and a third tension spring is fixedly connected between the second sealing member and the second liquid delivery shell. The second sealing member is located in the L-shaped cavity, and the facing sides of the evenly distributed second sealing members are commonly fixedly connected with 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.

[0010] Furthermore, the second liquid delivery shell is fixedly connected to the first liquid delivery shell and is connected with a liquid delivery pipe. The liquid holding shell is provided with a communicating cylindrical groove and an L-shaped groove. The liquid holding shell is slidably connected with a first sealing member, and 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.

[0011] Furthermore, a central axis of the first sealing member and a central axis of the locking member are perpendicular to each other, and a center line of the first sealing member and a center line of the sliding shell are parallel to each other.

[0012] Furthermore, the second liquid delivery shell is fixedly connected with uniformly distributed second limiting rings, the second limiting rings are used to limit the adjacent second sealing members, the second limiting rings are located in the L-shaped cavity, and a one-way valve is provided in the L-shaped cavity.

[0013] Furthermore, a sliding ring is provided in the rotating shell, a fourth tension spring is fixedly connected between the sliding ring and the sliding shell, the sliding ring is fixedly connected with evenly distributed pins whose number is the same as that of the first limiting member, the first limiting member is provided with a limiting groove, and the pin limits the first limiting member through the limiting groove on the first limiting member.

[0014] Furthermore, gaps are evenly distributed between the opposite sides of the first limiting members and the sliding shell, and the inner sides of the first limiting members and the second limiting members are both provided with inclined surfaces.

[0015] Furthermore, a soft pad is fixedly connected to one side of the first limiting member close to the axis of the sliding shell, so as to prevent the first limiting member from having a hard collision with the adjacent second limiting member.

[0016] The beneficial effects of the present invention are as follows: the present invention aims at the problem that the impeller eccentrically rotates due to unbalanced load or poor assembly, and then causes the impeller to collide with the pump body and cause damage, and proposes a design combining real-time monitoring and split connection, which forms an active connection between the impeller and the power source, and automatically disconnects the connection between the two when the monitoring system detects an abnormality of the impeller, thereby effectively avoiding potential damage to the impeller and other key components; The present invention installs a nozzle on the pump body. When the impeller needs to be cleaned, the nozzle automatically sprays cleaning liquid to soak the impeller, and cooperates with the rotation of the impeller to enhance the cleaning efficiency of the impeller. When the impeller does not need to be cleaned, the impeller and the nozzle are separated to achieve protection of the nozzle. In order to solve the problems of pump performance degradation, equipment damage and safety hazards caused by impeller reversal due to reverse circuit connection, the present invention proposes an innovative split 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a sectional view of the three-dimensional structure of the present invention; Figure 3 It is a three-dimensional structural cross-sectional view of the water guide shell of the present invention; Figure 4 It is a three-dimensional structural cross-sectional view of the fixed shell of the present invention; Figure 5 It is a three-dimensional structural cross-sectional view of the rotating shell of the present invention; Figure 6 It is a three-dimensional structural cross-sectional view of the sliding shell of the present invention; Figure 7It is a schematic diagram of the three-dimensional structure when the first limiting member and the second limiting member of the present invention are connected; Figure 8 It is a schematic diagram of the three-dimensional structure of the locking member and the first sealing member of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure when the first limiting member and the second limiting member of the present invention are not connected; Fig.10 It is a three-dimensional structural cross-sectional view of the connecting shell of the present invention; Fig.11 It is a sectional view of the three-dimensional structure of the second liquid delivery shell of the present invention.

[0018] In the figure: 1-water guide shell, 2-fixed shell, 3-first bolt frame, 4-rotating shell, 5-driving motor, 6-rotating shaft, 7-impeller, 8-sliding shell, 9-first limiting member, 10-second limiting member, 101-first liquid delivery shell, 11-liquid storage shell, 12-locking member, 121-first sealing member, 13-connecting shell, 14-sprinkler, 15-second bolt frame, 16-second liquid delivery shell, 17-L-shaped cavity, 18-second sealing member, 19-first limiting ring, 20-second limiting ring, 21-sliding ring, 22-latch pin. DETAILED DESCRIPTION

[0019] Although the present invention may be described with respect to a particular application or industry, those skilled in the art will recognize the broader applicability of the present invention. Those of ordinary skill in the art will recognize that terms such as: upper, lower, upward, downward, etc. are used to describe the drawings and do not represent limitations on the scope of the present invention as defined by the appended claims. Any numerical designations such as: first or second are merely exemplary and are not intended to limit the scope of the present invention in any way.

[0020] The present invention aims to solve the problem that the impeller and the pump body collide and cause damage due to eccentric rotation caused by unbalanced load or poor assembly of the impeller. A method combining real-time monitoring and split connection is proposed to achieve an active connection between the impeller and the power source. When the monitoring system detects that the impeller is abnormal, it can automatically disconnect the connection between the impeller and the power source, thereby effectively reducing the potential damage to the impeller and other key components.

[0021] Embodiment 1: A self-cleaning axial flow pump, such as Figure 1-Figure 11As shown, it includes: a water guide shell 1, a fixed shell 2 and a first bolt frame 3 are fixedly connected to the upper side of the water guide shell 1, and the first bolt frame 3 is fixed to the fixed shell 2; a rotating shell 4 is rotatably connected to the first bolt frame 3; a driving motor 5 is fixed to the water guide shell 1, and the output end of the driving motor 5 is fixed to the rotating shell 4, and the water guide shell 1 and the fixed shell 2 are rotatably connected to a rotating shaft 6, and an end of the rotating shaft 6 located in the water guide shell 1 is fixed to an impeller 7; a sliding shell 8 is slidably connected to the rotating shell 4, a first tension spring is fixedly connected between the sliding shell 8 and the rotating shell 4, and the sliding shell 8 is slidably connected to a uniformly distributed first limiter 9, a spring is fixedly connected between the first limiter 9 and the sliding shell 8, and the rotating shaft 6 is fixed to a second limiter 10 that is the same in number and uniformly distributed as the first limiter 9, and the first limiter 9 is used to establish a connection between the rotating shaft 6 and the sliding shell 8; a self-cleaning component is arranged on the water guide shell 1, and is used to clean the impeller 7; a limiter component is arranged on the first bolt frame 3, and is used to limit the position of the sliding shell 8.

[0022] In the above scheme, a one-way bearing is arranged in the fixed shell 2 for enabling the rotating shaft 6 to rotate smoothly, the axis of the rotating shaft 6 coincides with the axis of the output end of the driving motor 5, the driving motor 5 is electrically connected to the remote control terminal, and a sliding groove for guiding the sliding shell 8 is arranged in the rotating shell 4. When the upper side of the sliding groove in 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 limit member 9 and the second limit member 10 are both hook-shaped, and both can be made of aluminum alloy, titanium alloy, magnesium alloy and other materials with high hardness and light weight. When the impeller 7 rotates eccentrically, the sliding shell 8 drives all the first limit members 9 to move downward under the action of the first tension spring, so that the first limit member 9 is out of contact with the adjacent second limit member 10, and the power transmission of the driving motor 5 is actively disconnected.

[0023] like Figure 5-Figure 7 As shown, the self-cleaning assembly includes: a connecting shell 13, which is fixed to the side of the water guide shell 1 close to the impeller 7. The connecting shell 13 is fixed with a nozzle 14, which is used to clean the impeller 7. A baffle is detachably connected between the water guide shell 1 and the connecting shell 13.

[0024] In the above scheme, when the impeller 7 does not need to be cleaned, the baffle plates 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 plate on the lower side of the water guide shell 1 is consistent with the inner diameter of the water guide shell 1. The number of nozzles 14 can be adjusted according to actual conditions.

[0025] like Figure 5-Figure 7As shown, the limiting assembly includes: a first liquid delivery shell 101, fixedly connected to the first bolt frame 3; a liquid holding shell 11, fixedly connected to the rotating shell 4, the first liquid delivery shell 101 is rotatably connected and communicated with the liquid holding shell 11, a locking member 12 is sealed and slidably connected in 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 arranged on the side of the water guide shell 1 close to the impeller 7, and is used to monitor the rotation state of the rotating shaft 6.

[0026] In the above scheme, in order to prevent the liquid housing 11 from eccentrically rotating, the same parts can be installed again at the mirror image position of the liquid housing 11 and the locking member 12 according to the actual situation. The locking member 12 can be made of a material with high hardness and light weight such as aluminum alloy, titanium alloy, magnesium alloy, etc. Figure 5 When in the middle state, the second spring of the locking member 12 is in a stretched state.

[0027] like Fig.10 and Fig.11 As shown, the monitoring assembly includes: a second bolt frame 15, which is fixed to one side of the water guide shell 1 close to the impeller 7; a second liquid delivery shell 16, which is fixed to the second bolt frame 15, and a uniformly distributed L-shaped cavity 17 is arranged in the second liquid delivery shell 16, and the second liquid delivery shell 16 is slidably connected with a uniformly distributed second sealing member 18, and a third tension spring is fixed between the second sealing member 18 and the second liquid delivery shell 16, and the second sealing member 18 is located in the L-shaped cavity 17, and the opposite sides of the uniformly distributed second sealing members 18 are commonly fixed with a 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.

[0028] In the above scheme, the first limiting ring 19 is made of deformable material, the L-shaped cavity 17 is located in the lower inner part of the second liquid delivery shell 16, the back sides of the evenly distributed second sealing components 18 are all sealed and slidably connected to the second liquid delivery shell 16, and the opposite sides of the evenly distributed second sealing components 18 are not sealed and slidably connected to the second liquid delivery shell 16, and the axis of the first limiting ring 19 coincides with the axis of the rotating shaft 6.

[0029] like Figure 7 and Figure 8 As shown, the second liquid delivery shell 16 is fixedly connected to the first liquid delivery shell 101 and is connected with a liquid delivery pipe. A connecting cylindrical groove and an L-shaped groove are provided in the liquid holding shell 11. The liquid holding shell 11 is slidably connected with 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 connected with the cylindrical groove therein.

[0030] In the above scheme, in order to prevent the liquid holding shell 11 from eccentric rotation, the same parts can be installed again at the mirror image position of the liquid holding shell 11 and the first sealing member 121 according to actual conditions. When the first sealing member 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 influence of 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 exists on the side of the second sealing member 18 facing away from the rotating shaft 6), the lower side of the cylindrical groove of the first sealing member 121, and the L-shaped groove.

[0031] like Fig.11 As shown, the second liquid delivery shell 16 is fixedly connected with uniformly distributed second limiting rings 20, which are used to limit the adjacent second sealing member 18. The second limiting ring 20 is located in the L-shaped cavity 17, and a one-way valve is arranged in the L-shaped cavity 17.

[0032] In the above scheme, the second limit ring 20 is used to limit the maximum moving distance of the adjacent second sealing member 18. When the second sealing member 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 sealing member 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 an open state. The purpose of the one-way valve in the L-shaped cavity 17 is to discharge the hydraulic oil only from the L-shaped cavity 17, and the hydraulic oil cannot enter other L-shaped cavities 17.

[0033] Working principle: When the device is needed to transport liquid, the staff connects the drainage pipe and the suction pipe to the upper and lower sides of the water guide shell 1 respectively, so as to complete the preparation work before liquid transportation.

[0034] After completing the preparation work before liquid transportation, the staff starts the driving motor 5 through the control terminal, and the output end of the driving motor 5 drives the rotating shell 4 and the liquid containing shell 11 to rotate counterclockwise (looking from top to bottom, and the liquid containing shell 11 rotates along the first liquid delivery shell 101 during rotation), and the rotating shell 4 drives all the first limit members 9 to rotate synchronously through the sliding shell 8 thereon (at this time, the inclined surface of the first limit member 9 is in contact with the inclined surface of the adjacent second limit member 10), and the first limit member 9 then drives the adjacent second limit member 10 to rotate synchronously, and the second limit member 10 drives the rotating shaft 6 to rotate, so that the rotating shaft 6 drives the impeller 7 to rotate on the lower side of the water guide shell 1, thereby extracting the liquid on the lower side of the water guide shell 1.

[0035] In the process of conveying liquid, the impeller 7 is not uniform in quality due to unbalanced load or poor assembly, as well as different degrees of wear of various parts caused by long-term operation, which causes the central axis of the impeller 7 and the rotating shaft 6 to deviate from the central axis of the water guide shell 1 during eccentric rotation, resulting in eccentric vibration of the lower side of the rotating shaft 6 and the impeller 7. During the eccentric vibration, the rotating shaft 6 circumferentially squeezes the first limiting ring 19, and the first limiting ring 19 then squeezes the adjacent second sealing member 18, so that the second sealing member 18 moves to the side away from the rotating shaft 6 and stretches the adjacent third tension spring. During the movement of the second sealing member 18, the second sealing member 18 moves along the adjacent The L-shaped cavity 17 moves and squeezes the hydraulic oil in the adjacent L-shaped cavity 17 to increase its internal pressure, so that the hydraulic oil in the adjacent L-shaped cavity 17 pushes open the adjacent one-way valve and then enters the upper side of the second liquid delivery shell 16, and the second liquid delivery shell 16 delivers the hydraulic oil to the first liquid delivery shell 101 through the liquid delivery pipe thereon, and then the first liquid delivery shell 101 delivers the hydraulic oil to the cylindrical groove through the L-shaped groove in the liquid holding shell 11, thereby increasing the pressure in the cylindrical groove in the liquid holding shell 11 and moving the first sealing component 121 upward (in the process of the first sealing component 121 moving upward, the gas on the upper side of the cylindrical groove of the liquid holding shell 11 is discharged from the exhaust hole on the left side of the liquid holding shell 11).

[0036] When the first sealing member 121 moves upward to be out of contact with the locking member 12 , the locking member 12 moves to the left under the action of the second tension spring, so that the locking member 12 gradually breaks away from the limit on the sliding housing 8 .

[0037] When the locking member 12 is out of contact with the sliding shell 8, the sliding shell 8 drives all the first limit members 9 thereon to move downward under the action of the first tension spring on its lower side (the first limit members 9 gradually lose contact with the adjacent second limit members 10 during the downward movement). When all the first limit members 9 move to the point where they are no longer in contact with all the second limit members 10, the power transmission between the drive motor 5 and the rotating shaft 6 is disconnected to achieve the effect of emergency disconnection, thereby preventing the impeller 7 from continuing to operate under abnormal circumstances, thereby causing abnormal damage to the impeller 7 and other components.

[0038] After the power transmission of the impeller 7 disappears, the staff stops the operation of the drive motor 5 through the control terminal, and then repairs and replaces the abnormal parts.

[0039] After the repair and replacement of the abnormal parts are completed, the staff pulls the sliding shell 8 and its attached parts upward (the first tension spring is stretched during the upward movement of the sliding shell 8 to make it in a stretched state). When the sliding shell 8 drives all the first limiting members 9 to move to fit with the adjacent second limiting members 10 respectively, Figure 7After the state is reached, the staff presses the locking member 12 to move the locking member 12 in the direction of the rotating shaft 6 and move it back to the lower side of the sliding shell 8 (the locking member 12 stops moving after it moves to the point where it can be limited by the first sealing member 121), thereby restoring the limiting position of the sliding shell 8.

[0040] After the limit of the sliding shell 8 is restored, the staff inserts a tool into the corresponding L-shaped cavity 17 in the second liquid delivery shell 16 (that is, the L-shaped cavity 17 where the second sealing member 18 squeezed due to the eccentricity of the rotating shaft 6 is located), manually opens the one-way valve in the L-shaped cavity 17, and under the action of the third tension spring adjacent to the second sealing member 18, it moves to the direction of the rotating shaft 6 and resets. 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 decreases immediately, and negative pressure is generated under the action of the pressure reduction, 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 thereon, and then flow 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 is reduced, the first sealing member 121 is reinserted into the locking member 12 to restore the limit of the locking member 12.

[0041] When it is necessary to clean the impeller 7, the staff first pulls out the baffle on the lower side of the water guide shell 1 to expose the nozzle 14 in the water guide shell 1, and then connects the water pipe to the side of the nozzle 14 away from the water guide shell 1, and supplies the cleaning liquid to the nozzle 14 through the water pipe, and then the nozzle 14 sprays it out. At this time, the staff controls the driving motor 5 to rotate slowly through the control terminal, and the driving motor 5 drives the rotating shaft 6 to rotate through the transmission of the rotating shell 4 and its accessory parts, and the rotating shaft 6 drives the impeller 7 to rotate synchronously, so that the impeller 7 contacts the cleaning liquid sprayed from the nozzle 14 in a rotating state, thereby realizing the self-cleaning of the impeller 7.

[0042] After the impeller 7 is cleaned, the output end of the driving motor 5 gradually stops rotating, and then the shielding plate is reinserted into the water guide shell 1 by the staff.

[0043] When using an axial flow pump for liquid transportation, if the staff accidentally connects the circuit in reverse, the impeller will rotate in the opposite direction, making the pump unable to extract liquid normally. At the very least, the operation time will be delayed, and at worst, the bearings will be subjected to additional stress (the bearings of axial flow pumps usually rotate in one direction). In order to avoid this situation, the present invention adopts 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 can not only effectively prevent the negative impact caused by the reversal of the impeller 7, but also ensure the normal operation of the axial flow pump and the long-term reliability of the equipment.

[0044] Embodiment 2: Based on embodiment 1, Figure 5-Figure 7 and Fig. 9 As shown, a sliding ring 21 is arranged in the rotating shell 4, a fourth tension spring is fixedly connected between the sliding ring 21 and the sliding shell 8, the sliding ring 21 is fixedly connected with evenly distributed pins 22 whose number is the same as the first limiting member 9, the first limiting member 9 is provided with a limiting groove, the pin 22 limits the first limiting member 9 through the limiting groove on the first limiting member 9, and there are gaps between the opposite sides of the evenly distributed first limiting members 9 and the sliding shell 8, the inner sides of the first limiting members 9 and the second limiting members 10 are both provided with inclined surfaces, a soft pad is fixedly connected to one side of the first limiting member 9 close to the axis of the sliding shell 8, for preventing the first limiting member 9 from having a hard collision with the adjacent second limiting member 10, and 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 the springs on all the first limiting members 9.

[0045] In the above scheme, when the upper side of the pin 22 is in contact with the upper side of the first limit member 9, the fourth tension spring of the sliding ring 21 is in a stretched state, and the lower side of the pin 22 is consistent with the shape of the upper limit groove of the first limit member 9. There is a gap between the facing sides of the evenly distributed first limit members 9 and the sliding shell 8, which is used to provide space for the evenly distributed first limit members 9 to move toward each other.

[0046] Working principle: When the driving motor 5 rotates clockwise due to reverse circuit connection, the output end of the driving motor 5 drives the sliding shell 8 and all the first limit members 9 to rotate clockwise through the rotating shell 4 (clockwise when viewed from top to bottom). When the force of all the first limit members 9 driven by the sliding shell 8 exceeds the supporting force given to the first limit members 9 by the adjacent springs in the sliding shell 8, the inclined surface of the first limit member 9 is squeezed by the inclined surface of the second limit member 10, and the first limit member 9 moves to the side close to the second limit member 10 (the adjacent springs are stretched during the movement of the first limit member 9).

[0047] When the sliding shell 8 drives all the first limit members 9 to rotate and they are no longer in contact with the second limit members 10, the first limit members 9 are separated from the adjacent second limit members 10. At this point, the sliding shell 8 drives all the first limit members 9 to rotate individually to achieve the effect of disconnecting power transmission.

[0048] When the sliding shell 8 drives all the first limiting members 9 to rotate until the soft pad on the first limiting member 9 contacts the adjacent second limiting member 10 (the soft pad provides buffering), the first limiting member 9 is squeezed by the adjacent second limiting member 10, so that the first limiting member 9 moves to the side away from the second limiting member 10. Figure 8After reaching the state in the middle, the sliding ring 21 drives all the latches 22 to move downward under the action of the fourth tension spring, so that the latches 22 are respectively inserted into the limiting grooves on the adjacent first limiting members 9. Under the action of the tension provided by the fourth tension spring of the sliding ring 21, the sliding ring 21 drives all the latches 22 to be respectively inserted into the limiting grooves on the adjacent first limiting members 9. In the process of the latch 22 inserting into the limiting groove of the adjacent first limiting member 9, the first limiting member 9 continues to move away from the second limiting member 10 until the latch 22 is completely inserted into the limiting groove on the adjacent first limiting member 9. At this time, there is a distance between the opposite sides of all the first limiting members 9 and the back sides of all the second limiting members 10, so as to prevent all the first limiting members 9 from rotating again to repeatedly contact the adjacent second limiting members 10, causing the two to be affected to different degrees.

[0049] When the staff finds that the line is connected incorrectly, the staff disconnects the electrical connection of the drive motor 5 through the control terminal, and then connects the line correctly. After the line is connected correctly, the staff pulls the sliding ring 21 upward, so that the sliding ring 21 drives all the pins 22 to move upward and stretch the fourth tension spring (the fourth tension spring returns to the stretched state). After the pin 22 moves upward until it no longer contacts the limiting groove of the adjacent first limiting member 9, the first limiting member 9 moves and resets under the action of the adjacent spring, and then the staff releases the sliding ring 21. The sliding ring 21 applies a squeezing force to the pin 22 under the action of the fourth tension spring, so that the lower side of the pin 22 fits with the upper side of the adjacent first limiting member 9.

[0050] After all the first limiting members 9 are reset, the staff stretches all the first limiting members 9 inwards so that the inclined surfaces of all the first limiting members 9 are respectively fitted with the inclined surfaces of the adjacent second limiting members 10. Figure 7 Status in.

[0051] What is described above 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 self-cleaning axial flow pump, characterized in that: include: A water guide shell (1), wherein a fixed shell (2) and a first bolt frame (3) are fixedly connected to the upper side of the water guide shell (1), and the first bolt frame (3) is fixedly connected to the fixed shell (2); A rotating shell (4) rotatably connected to the first bolt frame (3); A drive motor (5) is fixedly connected to the water guide shell (1); an output end of the drive motor (5) is fixedly connected to the rotating shell (4); the water guide shell (1) and the fixed shell (2) are rotatably connected to a rotating shaft (6); one end of the rotating shaft (6) is fixedly connected to an impeller (7); A sliding shell (8) is slidably connected in the rotating shell (4); the sliding shell (8) is slidably connected to first limiting members (9) that are evenly distributed; the rotating shaft (6) is fixedly connected to second limiting members (10) that are the same in number as the first limiting members (9) and are evenly distributed; the first limiting members (9) are used to establish power transmission between the rotating shaft (6) and the sliding shell (8); A self-cleaning component, arranged on the water guide shell (1) and used for cleaning the impeller (7); A limiting assembly is arranged on the first bolt frame (3) and is used to limit the position of the sliding shell (8).

2. A self-cleaning axial flow pump according to claim 1, characterized in that: The self-cleaning component comprises: A connecting shell (13) is fixedly connected to a side of the water guide shell (1) close to the impeller (7); a nozzle (14) is fixedly connected to the connecting shell (13); the nozzle (14) is used to clean the impeller (7); and a shielding plate is detachably connected between the water guide shell (1) and the connecting shell (13).

3. A self-cleaning axial flow pump according to claim 1, characterized in that: The limiting component comprises: A first liquid delivery housing (101) fixedly connected to the first bolt frame (3); The liquid holding shell (11) is fixedly connected to the rotating shell (4); the first liquid delivery shell (101) is rotatably connected and communicated with the liquid holding shell (11); a locking member (12) is sealingly and slidably connected inside the liquid holding shell (11); a first tension spring is fixedly connected between the sliding shell (8) and the rotating shell (4); a spring is fixedly connected between the first limiting member (9) and the sliding shell (8); 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 component is arranged on a side of the water guide shell (1) close to the impeller (7) and is used to monitor the rotation state of the rotating shaft (6).

4. A self-cleaning axial flow pump according to claim 3, characterized in that: The monitoring components include: A second bolt bracket (15) is fixedly connected to a side of the water guide casing (1) close to the impeller (7); The second liquid-feeding shell (16) is fixedly connected to the second bolt frame (15); the second liquid-feeding shell (16) is provided with uniformly distributed L-shaped cavities (17); the second liquid-feeding shell (16) is slidably connected with uniformly distributed second sealing members (18); a third tension spring is fixedly connected between the second sealing members (18) and the second liquid-feeding shell (16); the second sealing members (18) are located in the L-shaped cavity (17); the first limiting ring (19) is fixedly connected to the opposite sides of the uniformly distributed second sealing members (18); 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).

5. A self-cleaning axial flow pump according to claim 4, characterized in that: The second liquid-feeding shell (16) is fixedly connected to the first liquid-feeding shell (101) and is connected to a liquid-feeding pipe. A communicating cylindrical groove and an L-shaped groove are provided in the liquid-containing shell (11). A first sealing member (121) is slidably connected to the liquid-containing shell (11). The first sealing member (121) is used to limit the locking member (12). A side of the first sealing member (121) away from the locking member (12) is located in the cylindrical groove of the liquid-containing shell (11).

6. A self-cleaning axial flow pump according to claim 5, characterized in that: The central axis of the first sealing component (121) and the central axis of the locking component (12) are perpendicular to each other, and the center line of the first sealing component (121) and the center line of the sliding shell (8) are parallel to each other.

7. A self-cleaning axial flow pump according to claim 4, characterized in that: The second liquid delivery shell (16) is fixedly connected with uniformly distributed second limiting rings (20), the second limiting rings (20) being used to limit the position of the adjacent second sealing member (18), the second limiting rings (20) being located in the L-shaped cavity (17), and a one-way valve being arranged in the L-shaped cavity (17).

8. A self-cleaning axial flow pump according to claim 3, characterized in that: A sliding ring (21) is arranged inside the rotating shell (4), a fourth tension spring is fixedly connected between the sliding ring (21) and the sliding shell (8), the sliding ring (21) is fixedly connected with latches (22) which are evenly distributed and the same in number as the first limiting member (9), the first limiting member (9) is provided with a limiting groove, and the latches (22) limit the first limiting member (9) through the limiting groove on the first limiting member (9).

9. A self-cleaning axial flow pump according to claim 8, characterized in that: Gaps are evenly distributed between the facing sides of the first limiting members (9) and the sliding shell (8), and the inner sides of the first limiting members (9) and the second limiting members (10) are both provided with inclined surfaces.

10. A self-cleaning axial flow pump according to claim 9, characterized in that: A soft cushion is fixedly connected to one side of the first limiting member (9) close to the axis of the sliding shell (8), so as to prevent the first limiting member (9) from having a hard collision with the adjacent second limiting member (10).

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