Axial flow pump capable of being automatically cleaned

Abstract

The invention relates to the technical field of axial flow pumps, in particular to an automatic-cleaning axial flow pump which comprises a shell, a filter frame, a rotating shaft, an impeller, a machine shell, a driving motor and the like. A filter frame is connected to the lower side of the shell, strip-shaped openings are formed in the right front side and the left rear side of the filter frame, a rotating shaft is rotationally connected into the shell, impellers are connected to the middle and the lower portion of the rotating shaft, a shell is connected to the upper side of the shell, a driving motor is connected into the shell, and an output shaft of the driving motor extends out of the lower side of the shell to be connected with the rotating shaft. The filter frame can filter water entering the shell, large impurities are prevented from entering the shell to impact the impeller or wind the rotating shaft, the cleaning brush continuously rotates forwards and backwards to clean the inner wall of the filter frame, and the situation that the water inlet effect is affected due to the fact that the filter frame is blocked is avoided; therefore, impurities swept out by the cleaning brush are pushed out from the strip-shaped opening.

Description

Technical Field

[0001] The present invention relates to the technical field of axial flow pumps, and in particular to an axial flow pump capable of automatic cleaning. Background Art

[0002] Axial flow pump is a hydraulic machine widely used in agricultural irrigation, urban water supply and other production and living sectors. When the axial flow pump is in use, impurities entering the pump body will hit the impeller, causing blockage and affecting the normal use of the axial flow pump.

[0003] The patent authorization announcement number CN115750433A discloses an axial flow pump with an automatic cleaning device. The axial flow pump filters the water sucked into the pump body by setting a water inlet filter device body. The water inlet filter device body can prevent the inner wall of the pump body from corroding and contaminating the transported liquid by coating an anti-corrosion coating layer on the inner wall of the pump body. By setting a water outlet filter device, some fine impurities can be filtered out, making the transported water cleaner and conducive to cleaning work. However, the main cleaning function of the axial flow pump is realized by the filtering structure, and it is impossible to effectively clean the impurities entering the pump body, nor can it discharge the impurities in the pump body, and the cleaning effect is poor.

[0004] To this end, we propose an axial flow pump that can automatically clean and discharge impurities inside the pump body. Summary of the Invention

[0005] In order to overcome the shortcoming of the existing axial flow pump that it is unable to clean and discharge impurities entering the pump body, the present invention provides an axial flow pump that can clean and discharge impurities inside the pump body and can be automatically cleaned.

[0006] The technical implementation scheme of the present invention is: an axial flow pump that can be automatically cleaned, including an outer shell, a filter frame, a rotating shaft, an impeller, a casing, a driving motor, a sealing ring, a cleaning mechanism and an opening and closing mechanism. The filter frame is connected to the lower side of the outer shell, and the right front side and the left rear side of the filter frame are both provided with strip openings. The outer shell is rotatably connected to the rotating shaft, and the middle and lower parts of the rotating shaft are both connected to the impeller. The upper side of the outer shell is connected to the casing, and the casing is connected to the driving motor. The output shaft of the driving motor extends out of the lower side of the casing and is connected to the rotating shaft. The lower side of the casing is connected to a sealing ring. A cleaning mechanism is provided between the rotating shaft and the filter frame. The cleaning mechanism is used to clean impurities on the inner wall of the filter frame. An opening and closing mechanism for discharging impurities is provided between the filter frame and the cleaning mechanism.

[0007] Optionally, the cleaning mechanism includes a turntable, a guide rail, a mounting plate, a first volute spring, a cleaning brush, a first spring telescopic rod and a first contact block. The lower end of the rotating shaft is connected to the turntable, the upper inner part of the filter frame is connected to the guide rail, the mounting plate is rotatably connected to the guide rail, the first volute spring is connected between the mounting plate and the guide rail, the left and right parts of the mounting plate are connected to cleaning brushes, the cleaning brushes are both in contact with the inner wall of the filter frame, the upper parts of the cleaning brushes are connected to the first spring telescopic rod, the inner ends of the first spring telescopic rods are connected to the first contact blocks, and the turntable rotates to contact the first contact block.

[0008] Optionally, the opening and closing mechanism includes a pushing block, a second spring telescopic rod and an opening and closing plate. The upper part of the cleaning brush is connected to the pushing block, the right front side and the left rear side of the upper inner part of the filter frame are connected to the second spring telescopic rod, and the extended ends of the second spring telescopic rod are connected to the opening and closing plates. The opening and closing plates block an adjacent strip opening, and the pushing block contacts the adjacent opening and closing plates when it rotates.

[0009] Optionally, it also includes a collection mechanism for collecting discharged impurities, the collection mechanism including a ring, a push rod, a first elastic member, a collection frame, a connecting block, a third spring telescopic rod, an L-shaped rod, a rotating plate and a second volute spring, the upper part of the filter frame is rotatably connected to the ring, the front and rear parts of the ring are slidably connected to the push rod, the cleaning brush rotates and contacts with the adjacent push rod, the first elastic member is connected between the push rod and the ring, the strip openings of the filter frame are slidably connected to the collection frame, the inner side of the collection frame is in contact with the adjacent opening and closing plates, the upper side of the collection frame is connected to the connecting block, the third spring telescopic rod is connected between the connecting block and the filter frame, the connecting block is connected to the L-shaped rod, the L-shaped rod is slidably connected to the ring, the outside of the collection frame is rotatably connected to two rotating plates, and the rotating plate and the adjacent collection frame are connected to the second volute spring.

[0010] Optionally, it also includes a discharging mechanism for pushing impurities in the collection frame, the discharging mechanism includes a push plate, a sliding plate, a second elastic member, a second contact block, a first torsion spring, a limit block, an L-shaped plate and a second torsion spring, the collection frame is rotatably connected with a push plate, the upper portion of the push plate extends out of the collection frame, the push plate is slidably connected with a sliding plate, two second elastic members are connected between the sliding plate and the adjacent push plate, the upper portion of the push plate is rotatably connected with a second contact block, the second contact block and the adjacent push plate are connected with a first torsion spring, the upper portion of the push plate is connected to a limit block, the right front side and the left rear side of the upper part of the filter frame are connected, the second contact block moves inward and contacts with the adjacent L-shaped plate, and the push plate and the adjacent collection frame are connected with a second torsion spring.

[0011] Optionally, a cleaning mechanism for cleaning the impeller is also included, the cleaning mechanism includes a connecting ring, a third elastic member, a brush, a contact rod and a pressure block, the middle and lower parts of the outer shell are slidably connected to the connecting ring, the third elastic member is connected between the connecting ring and the outer shell, a number of brushes are connected to the connecting ring, the brushes move downward and contact the adjacent impeller, the lower side of the connecting ring is connected to the contact rod, the middle and lower parts of the rotating shaft are connected to the pressure block, the pressure block rotates and contacts the adjacent contact rod.

[0012] Optionally, an anti-backflow mechanism is also included for preventing water from flowing back. The anti-backflow mechanism includes a strip plate, a block and a fourth elastic member. The strip plate is connected to the front position of the upper inner part of the shell. The block is slidably connected to the strip plate. The fourth elastic member is connected between the block and the strip plate.

[0013] Optionally, a water outlet pipe is connected to the front position of the upper portion of the shell.

[0014] The present invention has the following advantages: 1. The filter frame can filter the water entering the housing to prevent large impurities from entering the housing and hitting the impeller or winding around the rotating shaft. The cleaning brush can continuously rotate forward and reverse to clean the inner wall of the filter frame to avoid clogging of the filter frame and affecting the water inlet effect. By cooperating with the pushing block and the opening and closing plate, the opening and closing plate can be controlled to open intermittently so that the impurities swept out by the cleaning brush can be pushed out from the strip opening.

[0015] 2. After the opening and closing plate is opened, the collection frame will slide inward so that the cleaning brush can push the impurities into the collection frame, preventing external impurities from entering the filter frame through the strip opening, and also preventing the inward flowing water from washing away the impurities.

[0016] 3. When the collecting frame slides outward, the push plate rotates to drive the sliding plate to rotate outward, thereby pushing the impurities in the collecting frame outward.

[0017] 4. The contact rod and the pressure block can be used to control the brush to move downward and contact the impeller. When the impeller rotates, the brush can clean the impurities on the surface of the impeller.

[0018] 5. When the device stops pumping water, the fourth elastic member resets the control block to slide backward to block the connection between the shell and the water outlet pipe, preventing external impurities from entering the shell through the water outlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a schematic cross-sectional structural diagram of the present invention.

[0021] Figure 3 It is a partial cross-sectional structural schematic diagram of the present invention.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the cleaning mechanism of the present invention.

[0023] Figure 5 It is a partial cross-sectional structural schematic diagram of the cleaning mechanism of the present invention.

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the opening and closing mechanism of the present invention.

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the collecting mechanism of the present invention.

[0026] Figure 8 It is a partial three-dimensional structural schematic diagram of the collecting mechanism of the present invention.

[0027] Figure 9 It is a schematic diagram of the enlarged three-dimensional structure of part A of the present invention.

[0028] Figure 10 It is a schematic diagram of the three-dimensional structure of the discharging mechanism of the present invention.

[0029] Figure 11 It is a partial cross-sectional structural schematic diagram of the discharging mechanism of the present invention.

[0030] Figure 12 It is a partial three-dimensional structural schematic diagram of the discharging mechanism of the present invention.

[0031] Figure 13 It is a schematic diagram of the enlarged three-dimensional structure of part B of the present invention.

[0032] Figure 14 It is a schematic diagram of the three-dimensional structure of the cleaning mechanism of the present invention.

[0033] Figure 15 It is a partial three-dimensional structural schematic diagram of the cleaning mechanism of the present invention.

[0034] Figure 16 It is a schematic diagram of the three-dimensional structure of the anti-backflow mechanism of the present invention.

[0035] The components in the accompanying drawings are marked as follows: 1: housing, 2: filter frame, 3: rotating shaft, 4: impeller, 40: casing, 41: driving motor, 42: sealing ring, 5: cleaning mechanism, 51: rotating disk, 52: guide rail, 53: mounting plate, 54: first volute spring, 55: cleaning brush, 56: first spring telescopic rod, 57: first contact block, 6: opening and closing mechanism, 61: pushing block, 62: second spring telescopic rod, 63: opening and closing plate, 7: collecting mechanism, 71: ring, 72: pushing rod, 73: first elastic member, 74: collecting frame, 75: Connecting block, 76: third spring telescopic rod, 77: L-shaped rod, 78: rotating plate, 79: second scroll spring, 8: discharging mechanism, 81: pushing plate, 82: sliding plate, 83: second elastic member, 84: second contact block, 85: first torsion spring, 86: limiting block, 87: L-shaped plate, 88: second torsion spring, 9: cleaning mechanism, 91: connecting ring, 92: third elastic member, 93: brush, 94: contact rod, 95: pressing block, 10: anti-backflow mechanism, 101: strip plate, 102: stop block, 103: fourth elastic member. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that any directional terms such as "up," "down," "left," "right," "front," "back," "inside," and "outside" that appear or will appear herein are based solely on the accompanying drawings and are not intended to limit the present invention. Example 1

[0037] An axial flow pump that can clean itself automatically, such as Figure 1 、 Figure 2 and Figure 3 As shown, it includes a shell 1, a filter frame 2, a rotating shaft 3, an impeller 4, a casing 40, a drive motor 41, a sealing ring 42, a cleaning mechanism 5 and an opening and closing mechanism 6. A water outlet pipe is installed at the front position of the upper part of the shell 1. A filter frame 2 for filtering large impurities is installed on the lower side of the shell 1 by bolts. The filter frame 2 has strip openings on the right front side and the left rear side. The shell 1 is connected to the rotating shaft 3 through a bearing. The middle and lower parts of the rotating shaft 3 are keyed to the impeller 4. The upper side of the shell 1 is installed by bolts. The casing 40 has a drive motor 41 bolted inside, and the output shaft of the drive motor 41 extends out of the lower side of the casing 40 and is connected to the upper end of the rotating shaft 3 through a coupling. The lower side of the casing 40 is connected to a sealing ring 42 for preventing water from seeping into the drive motor 41. A cleaning mechanism 5 is provided between the rotating shaft 3 and the filter frame 2. The cleaning mechanism 5 can clean impurities on the inner wall of the filter frame 2. An opening and closing mechanism 6 is provided between the filter frame 2 and the cleaning mechanism 5. The opening and closing mechanism 6 can discharge impurities in the filter frame 2.

[0038] When using this device, the driving motor 41 drives the rotating shaft 3 to rotate, and the rotation of the rotating shaft 3 drives the impeller 4 to rotate. The rotation of the impeller 4 transports water upward and discharges it through the outlet pipe. Before the water enters the outer casing 1, the filter frame 2 can filter impurities in the water to prevent large impurities from hitting the impeller 4 or winding around the rotating shaft 3, affecting the normal use of the axial flow pump. Under the action of the sealing ring 42, water can be prevented from entering the casing 40, thereby affecting the operation of the driving motor 41. When pumping water, the cleaning mechanism 5 can clean the inside of the filter frame 2, and the cleaned impurities can be discharged through the opening and closing mechanism 6.

[0039] like Figure 2 、 Figure 4 and Figure 5 As shown, the cleaning mechanism 5 includes a turntable 51, a guide rail 52, a mounting plate 53, a first volute spring 54, a cleaning brush 55, a first spring telescopic rod 56 and a first contact block 57. The turntable 51 is key-connected to the lower end of the rotating shaft 3, the guide rail 52 is mounted in the upper position of the filter frame 2, the mounting plate 53 is rotatably connected to the guide rail 52, the first volute spring 54 is connected between the mounting plate 53 and the guide rail 52, and cleaning brushes 55 for cleaning the inner wall of the filter frame 2 are welded on both sides of the mounting plate 53. The upper part of the cleaning brush 55 is bolted with a first spring telescopic rod 56, and the inner end of the first spring telescopic rod 56 is welded with a first contact block 57. The rotation of the turntable 51 drives the first contact block 57 to rotate.

[0040] When using the device, the rotating shaft 3 rotates to drive the rotating disk 51 to rotate counterclockwise. When the rotating disk 51 rotates to contact the first contact block 57, the rotating disk 51 continues to rotate to push the first contact block 57 to rotate counterclockwise. The first contact block 57 rotates counterclockwise to drive the cleaning brush 55 to rotate counterclockwise through the first spring telescopic rod 56. The cleaning brush 55 rotates counterclockwise to drive the mounting plate 53 to rotate counterclockwise on the guide rail 52. The first volute spring 54 is deformed. When the cleaning brush 55 rotates to a certain distance, the rotating disk 51 continues to rotate to squeeze the first contact block 57. When the first contact block 57 is disengaged from the rotating disk 51, the first spring telescopic rod 56 is extended to drive the first contact block 57 to move inward and reset. Under the action of the first volute spring 54 resetting, the mounting plate 53 drives the cleaning brush 55 to rotate clockwise and reset. When the rotating disk 51 is rotated again to contact the first contact block 57, the above action is repeated to make the cleaning brush 55 rotate forward and backward continuously, thereby cleaning the inner wall of the filter frame 2 to prevent the filter frame 2 from being blocked and affecting the water inlet effect.

[0041] like Figure 2 and Figure 6As shown, the opening and closing mechanism 6 includes a pushing block 61, a second spring telescopic rod 62 and an opening and closing plate 63. The pushing block 61 is welded to the upper part of the cleaning brush 55, and the second spring telescopic rod 62 is bolted to the right front side and the left rear side of the upper inner part of the filter frame 2. The extended ends of the second spring telescopic rod 62 are welded with an opening and closing plate 63 for blocking the strip opening. The pushing block 61 rotates to squeeze the adjacent opening and closing plates 63 to open.

[0042] When using the device, the cleaning brush 55 rotates counterclockwise to drive the pushing block 61 to rotate counterclockwise. When the pushing block 61 rotates counterclockwise to contact the opening and closing plate 63, the pushing block 61 continues to rotate counterclockwise to drive the opening and closing plate 63 to move counterclockwise. The second spring telescopic rod 62 shortens, and the opening and closing plate 63 no longer blocks the strip opening after moving counterclockwise. At this time, the impurities swept out by the cleaning brush 55 can be pushed out from the strip opening. When the cleaning brush 55 rotates clockwise to reset, the pushing block 61 rotates clockwise accordingly and no longer squeezes the opening and closing plate 63. The extension of the second spring telescopic rod 62 drives the opening and closing plate 63 to move clockwise to reset and re-block the strip opening. In this way, the impurities cleaned by the cleaning brush 55 can be automatically discharged from the filter frame 2. Example 2

[0043] On the basis of Example 1, Figure 1 、 Figure 2 、 Figure 7 、 Figure 8 and Figure 9 As shown, it also includes a collecting mechanism 7, which can collect discharged impurities. The collecting mechanism 7 includes a ring 71, a push rod 72, a first elastic member 73, a collecting frame 74, a connecting block 75, a third spring telescopic rod 76, an L-shaped rod 77, a rotating plate 78 and a second volute spring 79. The upper part of the filter frame 2 is rotatably connected to the ring 71, and the front and rear parts of the ring 71 are slidably connected to the push rod 72. The lower part of the push rod 72 is inclined, and the cleaning brush 55 rotates to contact the adjacent push rod 72. The first elastic member 73 is connected between the push rod 72 and the ring 71. The strip openings of frame 2 are all slidably connected with collection frames 74 for collecting impurities. The inner sides of the collection frames 74 are in contact with the adjacent opening and closing plates 63, and the collection frames 74 are limited by the opening and closing plates 63. Connecting blocks 75 are welded on the upper sides of the collection frames 74. A third spring telescopic rod 76 is connected between the connecting blocks 75 and the filter frame 2. L-shaped rods 77 are welded on the connecting blocks 75. The L-shaped rods 77 are slidably connected to the rings 71. The outside of the collection frame 74 is connected to two rotating plates 78 through bearings. A second volute spring 79 is connected between the rotating plate 78 and the adjacent collection frame 74.

[0044] When the cleaning brush 55 is rotated to disengage from the push rod 72, the first elastic member 73 is deformed, and when ... Under the action of the elastic member 73 returning to its original position, the push rod 72 slides downward and returns to its original position. When the cleaning brush 55 controls the push block 61 to squeeze the opening and closing plate 63 to move counterclockwise to open, the third spring telescopic rod 76 shortens and drives the connecting block 75 to move inward. The inward movement of the connecting block 75 drives the L-shaped rod 77 to move inward. The inward movement of the L-shaped rod 77 drives the ring 71 to rotate counterclockwise. When the connecting block 75 moves inward, it also drives the collection frame 74 to slide inward, so that the cleaning brush 55 can push impurities into the collection frame 74 to prevent external impurities from passing through the strip opening. The cleaning brush 55 rotates clockwise until it contacts the push rod 72, and the cleaning brush 55 continues to rotate clockwise to control the push rod 72 to rotate clockwise. The push rod 72 rotates clockwise to drive the ring 71 to rotate clockwise. The ring 71 rotates clockwise to squeeze the L-shaped rod 77 to move outward. The L-shaped rod 77 moves outward to drive the connecting block 75 to move outward. The connecting block 75 moves outward to control the extension of the third spring telescopic rod 76. The connecting block 75 moves outward to drive the collecting frame 74 to move The outer sliding is reset. After the collection frame 74 slides outward, the opening and closing plate 63 moves clockwise to block the inner side of the collection frame 74 again. When the ring 71 rotates clockwise for a certain distance, the cleaning brush 55 continues to rotate clockwise to squeeze the push rod 72 to slide upward again, and then disengage from the push rod 72. When the use of this device is completed, the staff can control the rotating plate 78 to rotate outward and open to clean impurities. The second scroll spring 79 is deformed. After the impurities are cleaned, the second scroll spring 79 is reset to drive the rotating plate 78 to rotate inward and close.

[0045] like Figure 2 、 Figure 10 、 Figure 11 、 Figure 12 and Figure 13As shown, the discharging mechanism 8 is also included. The discharging mechanism 8 can push out the impurities in the collection frame 74. The discharging mechanism 8 includes a pushing plate 81, a sliding plate 82, a second elastic member 83, a second contact block 84, a first torsion spring 85, a limit block 86, an L-shaped plate 87 and a second torsion spring 88. The collection frame 74 is connected to the pushing plate 81 through a bearing. The upper part of the pushing plate 81 extends out of the collection frame 74. The pushing plate 81 is slidably connected to the sliding plate 82. The pushing plate 81 and the sliding plate 82 rotate outward to push the impurities out of the collection frame 74. The sliding plate 82 and the corresponding The upper and lower parts of the adjacent push plates 81 are connected with a second elastic member 83, the upper part of the push plate 81 is rotatably connected with a second contact block 84, the second contact block 84 and the adjacent push plate 81 are connected with a first torsion spring 85, the upper part of the push plate 81 is welded with a limit block 86 for limiting the second contact block 84, and the right front side and left rear side of the upper part of the filter frame 2 are welded with an L-shaped plate 87. The second contact block 84 moves inward and is squeezed and rotated by the adjacent L-shaped plate 87, and a second torsion spring 88 is connected between the push plate 81 and the adjacent collection frame 74.

[0046] When the second contact block 84 moves inward and contacts the L-shaped plate 87, the second contact block 84 continues to move inward and is squeezed by the L-shaped plate 87 to swing outward on the push plate 81. The first torsion spring 85 is deformed. When the second contact block 84 moves inward and disengages from the L-shaped plate 87, the second contact block 84 swings inward and resets under the action of the first torsion spring 85. When the collection frame 74 slides outward, the push plate 81 drives the second contact block 84 to move outward. When the second contact block 84 moves outward and contacts the L-shaped plate 87, the second contact block 84 is squeezed by the L-shaped plate 87 and swings outward. When the L-shaped plate 87 contacts, the second contact block 84 continues to move outward and is squeezed by the L-shaped plate 87 to swing inward. Under the action of the limit block 86, the inward swing of the second contact block 84 will drive the push plate 81 to rotate, and the second torsion spring 88 will deform. The rotation of the push plate 81 drives the sliding plate 82 to rotate outward, thereby pushing the impurities in the collection frame 74 outward. Under the action of the second elastic member 83, the sliding plate 82 can slide on the push plate 81 to maintain a state of fit with the inner wall of the collection frame 74. When the second contact block 84 moves outward to disengage from the L-shaped plate 87, under the action of the second torsion spring 88 resetting, the push plate 81 then drives the sliding plate 82 to rotate inward and reset.

[0047] like Figure 2 、 Figure 14 and Figure 15As shown, a cleaning mechanism 9 is also included, which can clean the impeller 4. The cleaning mechanism 9 includes a connecting ring 91, a third elastic member 92, a brush 93, a contact rod 94 and a pressure block 95. The middle and lower parts of the outer shell 1 are slidably connected to the connecting ring 91, and the third elastic member 92 is connected between the connecting ring 91 and the outer shell 1. Three brushes 93 are equidistantly connected to the connecting ring 91. The brushes 93 move downward to clean the impeller 4. Contact rods 94 are welded to the lower side of the connecting ring 91. The middle and lower parts of the rotating shaft 3 are keyed to the pressure blocks 95. The pressure blocks 95 rotate and squeeze the adjacent contact rods 94 to move downward.

[0048] When using the device, the rotation of the rotating shaft 3 drives the pressure block 95 to rotate. When the pressure block 95 rotates to contact the contact rod 94, the pressure block 95 continues to rotate to squeeze the contact rod 94 to move downward. The downward movement of the contact rod 94 drives the connecting ring 91 to slide downward, and the third elastic member 92 is deformed. The connecting ring 91 slides downward and drives the brush 93 to move downward. After moving downward, the brush 93 contacts the impeller 4. When the impeller 4 rotates, the brush 93 can clean the impeller 4 surface impeller 4. When the pressure block 95 rotates to disengage from the contact rod 94, under the action of the third elastic member 92 resetting, the connecting ring 91 drives the brush 93 to move upward and disengage from the impeller 4.

[0049] like Figure 1 and Figure 16 As shown, it also includes an anti-backflow mechanism 10, which can prevent water from flowing back. The anti-backflow mechanism 10 includes a strip plate 101, a block 102 and a fourth elastic member 103. The strip plate 101 is welded to the front position of the upper inner part of the shell 1, and a block 102 for blocking the water outlet pipe is slidably connected to the strip plate 101. The fourth elastic member 103 is connected between the block 102 and the strip plate 101.

[0050] When the device is used, the water in the shell 1 hits the stopper 102 and slides forward, and the fourth elastic member 103 is deformed. After the stopper 102 slides forward, it no longer blocks the connection between the shell 1 and the water outlet pipe, and the water in the shell 1 can be discharged through the water outlet pipe. When the device stops pumping water, under the action of the fourth elastic member 103 returning to its original position, the stopper 102 slides backward and returns to its original position to block the connection between the shell 1 and the water outlet pipe again, thereby preventing external impurities from entering the shell 1 through the water outlet pipe.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An axial flow pump capable of automatic cleaning, comprising a housing (1), a filter frame (2), a rotating shaft (3), an impeller (4), a casing (40), a driving motor (41) and a sealing ring (42), wherein the lower side of the housing (1) is connected to the filter frame (2), the right front side and the left rear side of the filter frame (2) are both provided with strip openings, the inner side of the housing (1) is rotatably connected to the rotating shaft (3), the middle and lower parts of the rotating shaft (3) are both connected to the impeller (4), the upper side of the housing (1) is connected to the casing (40), the inner side of the casing (40) is connected to the driving motor (41), the output shaft of the driving motor (41) extends out of the lower side of the casing (40) and is connected to the rotating shaft (3), the lower side of the casing (40) is connected to the sealing ring (42), and the pump is characterized in that: The filter further comprises a cleaning mechanism (5) and an opening and closing mechanism (6). The cleaning mechanism (5) is provided between the rotating shaft (3) and the filter frame (2). The cleaning mechanism (5) is used to clean impurities on the inner wall of the filter frame (2). An opening and closing mechanism (6) is provided between the filter frame (2) and the cleaning mechanism (5) for discharging impurities.

2. The self-cleaning axial flow pump according to claim 1, characterized in that: The cleaning mechanism (5) comprises a rotating disk (51), a guide rail (52), a mounting disk (53), a first volute spring (54), a cleaning brush (55), a first spring telescopic rod (56) and a first contact block (57). The lower end of the rotating shaft (3) is connected to the rotating disk (51), the upper inner portion of the filter frame (2) is connected to the guide rail (52), the upper portion of the guide rail (52) is rotatably connected to the mounting disk (53), the first volute spring (54) is connected between the mounting disk (53) and the guide rail (52), the left and right portions of the mounting disk (53) are connected to cleaning brushes (55), the cleaning brushes (55) are in contact with the inner wall of the filter frame (2), the upper portions of the cleaning brushes (55) are connected to the first spring telescopic rod (56), the inner ends of the first spring telescopic rod (56) are connected to the first contact block (57), and the rotating disk (51) contacts the first contact block (57) when rotating.

3. The self-cleaning axial flow pump according to claim 2, characterized in that: The opening and closing mechanism (6) includes a push block (61), a second spring telescopic rod (62) and an opening and closing plate (63). The upper part of the cleaning brush (55) is connected to the push block (61). The right front side and the left rear side of the upper inner part of the filter frame (2) are connected to the second spring telescopic rod (62). The extended ends of the second spring telescopic rod (62) are connected to the opening and closing plate (63). The opening and closing plates (63) block an adjacent strip opening. The push block (61) rotates to contact the adjacent opening and closing plate (63).

4. The self-cleaning axial flow pump according to claim 3, characterized in that: The filter frame (2) further comprises a collecting mechanism (7) for collecting discharged impurities, wherein the collecting mechanism (7) comprises a ring (71), a push rod (72), a first elastic member (73), a collecting frame (74), a connecting block (75), a third spring telescopic rod (76), an L-shaped rod (77), a rotating plate (78) and a second volute spring (79). The upper portion of the filter frame (2) is rotatably connected to the ring (71), and the front and rear portions of the ring (71) are both slidably connected to the push rod (72). The cleaning brush (55) rotates to contact the adjacent push rod (72), and the push rod (72) and the ring (71) are both connected to the first elastic member ( 73), the strip openings of the filter frame (2) are all slidably connected to the collecting frame (74), the inner sides of the collecting frame (74) are in contact with the adjacent opening and closing plates (63), the upper sides of the collecting frame (74) are all connected to the connecting blocks (75), and the third spring telescopic rod (76) is connected between the connecting blocks (75) and the filter frame (2), and the connecting blocks (75) are all connected to the L-shaped rod (77), and the L-shaped rod (77) is slidably connected to the ring (71), and the outside of the collecting frame (74) is rotatably connected to two rotating plates (78), and the rotating plates (78) and the adjacent collecting frames (74) are connected with second volute springs (79).

5. The self-cleaning axial flow pump according to claim 4, characterized in that: The collecting frame (74) further includes a discharging mechanism (8) for pushing out impurities in the collecting frame (74), wherein the discharging mechanism (8) includes a pushing plate (81), a sliding plate (82), a second elastic member (83), a second contact block (84), a first torsion spring (85), a limiting block (86), an L-shaped plate (87) and a second torsion spring (88), wherein the collecting frame (74) is rotatably connected to the pushing plate (81), the upper portion of the pushing plate (81) extends out of the collecting frame (74), the pushing plate (81) is slidably connected to the sliding plate (82), and the sliding plate (82) and the adjacent pushing plate ( Two second elastic members (83) are connected between the push plate (81), the upper part of the push plate (81) is rotatably connected to the second contact block (84), the second contact block (84) and the adjacent push plate (81) are connected to a first torsion spring (85), the upper part of the push plate (81) is connected to a limit block (86), the right front side and the left rear side of the upper part of the filter frame (2) are connected to an L-shaped plate (87), the second contact block (84) moves inward and contacts the adjacent L-shaped plate (87), and the push plate (81) and the adjacent collection frame (74) are connected to a second torsion spring (88).

6. The self-cleaning axial flow pump according to claim 5, characterized in that: The invention also includes a cleaning mechanism (9) for cleaning the impeller (4), the cleaning mechanism (9) including a connecting ring (91), a third elastic member (92), a brush (93), a contact rod (94) and a pressure block (95), the middle and lower parts of the housing (1) are both slidably connected to the connecting ring (91), the third elastic member (92) is connected between the connecting ring (91) and the housing (1), a plurality of brushes (93) are connected to the connecting ring (91), the brushes (93) move downward and contact the adjacent impeller (4), the lower side of the connecting ring (91) is connected to the contact rod (94), the middle and lower parts of the rotating shaft (3) are both connected to the pressure block (95), and the pressure block (95) rotates and contacts the adjacent contact rod (94).

7. The self-cleaning axial flow pump according to claim 6, characterized in that: The invention also includes an anti-backflow mechanism (10) for preventing water from flowing back. The anti-backflow mechanism (10) includes a strip plate (101), a stopper (102) and a fourth elastic member (103). The strip plate (101) is connected to the front position of the upper inner portion of the housing (1). The stopper (102) is slidably connected to the strip plate (101). The fourth elastic member (103) is connected between the stopper (102) and the strip plate (101).

8. The self-cleaning axial flow pump according to claim 7, characterized in that: A water outlet pipe is connected to the front portion of the upper portion of the housing (1).

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