A cleaning device for a vertical open axial-flow pump

Abstract

The present invention provides a cleaning device for a vertical open axial flow pump, which relates to the technical field of cleaning vertical open axial flow pumps and includes: a traveling structure, including a first annular body, on the inner circumference of which a driving wheel is embedded. The first annular body can be sleeved on the pump shaft and contact the outer circumference of the pump shaft through the driving wheel. A second annular body is movably sleeved on the outer circumference of the first annular body and is provided with a driving component; a plurality of first connecting rods are radially connected to the outer circumference of the second annular body. One end of each first connecting rod is hinged with a second connecting rod, and a first telescopic component is connected between the first connecting rod and the second connecting rod. The first telescopic component is used to adjust the angle between the second connecting rod and the first connecting rod. One end of each second connecting rod is connected with a third connecting rod through a bidirectional rotation structure, and a scraper is arranged at one end of each third connecting rod, solving the problems in the prior art that it is difficult to clean a vertical open axial flow pump, and the cleaning effect and cleaning efficiency are poor.

Description

Technical Field

[0001] The invention belongs to the technical field of cleaning of vertical open axial flow pumps, and more specifically, relates to a cleaning device for a vertical open axial flow pump. Background Art

[0002] The vertical open axial flow pump has the functions of pumping and drawing in both directions. A first guide housing and a second guide housing are arranged above the outer periphery of the impeller, and when in use, the water flow can flow out around along the first guide housing. At present, the vertical open axial flow pump can be applied to pumping stations, such as Figure 1 As described, in an application scenario of the vertical open axial flow pump, the vertical open axial flow pump 101 is matched with a suitable two-way inlet and outlet water flow channel and a gate 102. Without changing the rotation direction of the pump, by controlling the gate 102 on the inlet and outlet water flow channel, the forward and reverse switching of the water flow can be conveniently realized, and the forward and reverse operation performances are the same, meeting the use requirements of the pumping station of the water conservancy project.

[0003] During the use of the vertical open axial flow pump, the water flow pumped contains foreign matters such as sediment, algae and sundries. It is inevitable that the foreign matters in the water flow will adhere to the first guide housing and the second guide housing of the vertical open axial flow pump. If not cleaned regularly, it will affect the use and service life of the vertical open axial flow pump. At present, there is no special equipment for cleaning the first guide housing and the second guide housing of the vertical open axial flow pump, and the cleaning is very difficult, time-consuming and laborious. Summary of the Invention

[0004] The purpose of the invention is to provide a cleaning device for a vertical open axial flow pump aiming at the deficiencies existing in the prior art, and solve the problems of difficult cleaning, poor cleaning effect and cleaning efficiency in the prior art for the vertical open axial flow pump.

[0005] To achieve the above purpose, the invention provides a cleaning device for a vertical open axial flow pump. The vertical open axial flow pump includes an impeller, a pump shaft and a driving mechanism arranged in sequence from bottom to top. An upwardly extending and gradually expanding first guide housing is arranged on the outer periphery of the impeller, and a second guide housing is arranged on the inner side of the upper part of the first guide housing. The device includes:

[0006] A traveling structure, the traveling structure includes a first annular body, a driving wheel is embedded in the inner circumference of the first annular body, and the first annular body can be sleeved on the pump shaft and contact the outer periphery of the pump shaft through the driving wheel.

[0007] A second annular body is movably sleeved on the outer periphery of the first annular body, and a driving component is arranged between the second annular body and the first annular body. The driving component can drive the second annular body to rotate.

[0008] A plurality of first connecting rods are radially connected to the outer periphery of the second annular body. One second connecting rod is hinged to the outer end of each of the first connecting rods. A first telescopic member is connected between the first connecting rod and the second connecting rod. The first telescopic member is used to adjust the included angle between the second connecting rod and the first connecting rod. One third connecting rod is connected to the outer end of each of the second connecting rods through a bidirectional rotation structure. A scraper is provided at the outer end of each of the third connecting rods.

[0009] Optionally, the bidirectional rotation structure includes:

[0010] A first connecting ear, one end of which is telescopically embedded in a first chute on the second connecting rod;

[0011] A receiving groove is opened on the third connecting rod and is used to receive the first connecting ear. The first connecting ear is hinged to both side walls of the receiving groove through a first pin shaft. When the first connecting ear retracts, both side walls of the receiving groove can be butted against the plane of the second connecting rod;

[0012] A first connecting column is fixed on the third connecting rod;

[0013] A second connecting column is connected to the second connecting rod through a second telescopic member and can move in a direction perpendicular to the axis of the second connecting rod;

[0014] A first tension spring, both ends of which are respectively connected to the first connecting column and the second connecting column and are in a pre-tensioned state.

[0015] Optionally, the scraper is a rectangular blade. One side of the scraper is a cutting edge, and the other side is a back of the knife. A second connecting ear is provided in the middle of the back of the knife. The second connecting ear is hinged to the outer end of the third connecting rod through a second pin shaft. First torsion springs and second torsion springs are respectively sleeved at both ends of the second pin shaft. The energy storage directions of the first torsion spring and the second torsion spring are opposite. When the scraper is in a state without external force, the edge of the back of the knife of the scraper is perpendicular to the axis of the third connecting rod.

[0016] Optionally, the driving wheel is connected to a first worm and worm reducer and a first driving motor through a wheel shaft. The first driving motor is embedded in the first annular body. At least two driven wheels are also embedded in the inner periphery of the first annular body. The driven wheels and the driving wheel are evenly distributed on the outer periphery of the pump shaft.

[0017] Optionally, rubber layers are provided on the outer peripheries of the driving wheel and the driven wheels, and the rubber layers are in close contact with the outer periphery of the pump shaft.

[0018] Optionally, the first annular body includes a first inner ring, a second inner ring, and an outer ring. The first inner ring and the second inner ring are coaxially arranged. The driving wheel is embedded in the inner circumference of the first inner ring. A rotation limiting portion and a third torsion spring in a pre-twisted state are provided between the first inner ring and the second inner ring. When the second inner ring rotates in one direction relative to the first inner ring, the third torsion spring stores energy, and the rotation limiting portion can limit the second inner ring from rotating in the other direction; a part of the outer ring is sleeved on the outside of the first inner ring, and another part of the outer ring is sleeved on the outside of the second inner ring. Guide ribs are provided on the outer circumferences of the first inner ring and the second inner ring, and guide grooves matching the guide ribs are provided on the inner circumference of the outer ring.

[0019] Optionally, the outer ring is connected to the first inner ring through a third telescopic member.

[0020] Optionally, the driving component includes a second worm and gear reducer and a second driving motor. The second driving motor is fixed on the first annular body. The worm wheel of the second worm and gear reducer is arranged on the second annular body, and the worm of the second worm and gear reducer is connected to the output end of the second driving motor.

[0021] Optionally, the third connecting rod includes a first part and a second part. A plugging groove is provided at one end of the first part, and a plugging portion is provided at one end of the second part. The plugging portion is arranged in the plugging groove, and a pressure sensor is provided between the plugging portion and the bottom of the plugging groove. A first spur gear is provided on the outer circumference of the plugging portion near the pressure sensor, and a third driving motor is provided at the bottom of the plugging groove. The output end of the third driving motor is connected with a second spur gear through a third worm and gear reducer, and the second spur gear meshes with the first spur gear.

[0022] Optionally, a control unit is further included, and the control unit is used to control the operation of the driving wheel, the driving component, and the first telescopic member.

[0023] The present invention provides a cleaning device for a vertical open axial flow pump, and its beneficial effects are as follows: During the maintenance of the vertical open axial flow pump, after removing the driving mechanism on its upper part, the first annular body of the walking structure can be sleeved on the pump shaft, and the walking structure contacts the pump shaft through the driving wheel, enabling the device to move downward. During this process, the angle between the second connecting rod and the first connecting rod can be adjusted through the first telescopic member, so that the third connecting rod and the second connecting rod can extend into the space between the first guide housing and the second guide housing. And through the bidirectional rotation structure, the third connecting rod can be rotated outward or inward to form an angle with the second connecting rod, so that the scraper can contact the inner surface of the first guide housing and the outer surface of the second guide housing. Then, the second annular body can be driven by the driving member to drive the first connecting rod, the second connecting rod, the third connecting rod and the scraper to rotate, and the foreign matters attached to the inner surface of the first guide housing and the outer surface of the second guide housing can be scraped off along the circumferential direction by the scraper. Or the foreign matters attached to the inner surface of the first guide housing and the outer surface of the second guide housing can be scraped off along the vertical direction by the up-and-down movement of the walking structure, realizing the cleaning of the first guide housing and the second guide housing of the vertical open axial flow pump. The cleaning is convenient and fast, and the cleaning effect is good.

[0024] Other features and advantages of the present invention will be described in detail in the following specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] By describing the exemplary embodiments of the present invention in more detail in conjunction with the drawings, the above and other objects, features and advantages of the present invention will become more obvious. Among them, in the exemplary embodiments of the present invention, the same reference numerals generally represent the same components.

[0026] Figure 1 FIG. shows a schematic application scenario diagram of a vertical open axial flow pump in the prior art.

[0027] Figure 2 FIG. shows a front view structural schematic diagram of a cleaning device for a vertical open axial flow pump according to an embodiment of the present invention.

[0028] Figure 3 FIG. shows a top view structural schematic diagram of a cleaning device for a vertical open axial flow pump according to an embodiment of the present invention.

[0029] Figure 4 FIG. shows a schematic diagram of a use state when a cleaning device for a vertical open axial flow pump according to an embodiment of the present invention is applied to a vertical open axial flow pump.

[0030] Figure 5Shows another schematic diagram of the usage state when a cleaning device for a vertical open axial-flow pump according to an embodiment of the present invention is applied to a vertical open axial-flow pump.

[0031] Figure 6 Shows a schematic diagram of a two-way rotation structure of a cleaning device for a vertical open axial-flow pump according to an embodiment of the present invention.

[0032] Figure 7 Shows a schematic diagram of the structure of a first annular body of a cleaning device for a vertical open axial-flow pump according to an embodiment of the present invention.

[0033] Figure 8 Shows a schematic diagram of the structure of a third connecting rod of a cleaning device for a vertical open axial-flow pump according to an embodiment of the present invention.

[0034] Explanation of reference numerals:

[0035] In Figure 1 :

[0036] 101, vertical open axial-flow pump; 102, gate;

[0037] In Figures 2 to 8 :

[0038] 1, impeller; 2, pump shaft; 3, drive mechanism; 4, first guide housing; 5, second guide housing; 6, first annular body; 7, second annular body; 8, first connecting rod; 9, second connecting rod; 10, first telescopic member; 11, two-way rotation structure; 12, third connecting rod; 13, scraper; 14, first connecting ear; 15, first pin shaft; 16, first connecting column; 17, second connecting column; 18, first tension spring; 19, second telescopic member; 20, telescopic rod; 21, first inner ring; 22, second inner ring; 23, outer ring; 24, rotation limiting portion; 25, third torsion spring; 26, guiding rib; 27, third telescopic member; 28, first part; 29, second part; 30, insertion portion; 31, pressure sensor; 32, strengthening rod; 33, first spur gear; 34, third driving motor; 35, third worm and worm gear reducer; 36, second spur gear. Embodiment

[0039] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0040] AsFigures 2 to 8 As shown in the figure, the present invention provides a cleaning device for a vertical open axial flow pump. The vertical open axial flow pump includes an impeller 1, a pump shaft 2, and a driving mechanism 3 arranged in sequence from bottom to top. An upwardly extending and gradually expanding first guide housing 4 is provided on the outer periphery of the impeller 1. A second guide housing 5 is provided on the inner side of the upper part of the first guide housing. The device includes:

[0041] A traveling structure, which includes a first annular body 6. A driving wheel is embedded in the inner periphery of the first annular body 6. The first annular body 6 can be sleeved on the pump shaft 2 and contacts the outer periphery of the pump shaft 2 through the driving wheel.

[0042] A second annular body 7 is movably sleeved on the outer periphery of the first annular body 6. A driving component is provided between the second annular body 7 and the first annular body 6, and the driving component can drive the second annular body 7 to rotate.

[0043] A plurality of first connecting rods 8 are radially connected to the outer periphery of the second annular body 7. A second connecting rod 9 is hinged to the outer end of each first connecting rod 8. A first telescopic component 10 is connected between the first connecting rod 8 and the second connecting rod 9. The first telescopic component 10 is used to adjust the included angle between the second connecting rod 9 and the first connecting rod 8. The outer end of each second connecting rod 9 is connected to a third connecting rod 12 through a bidirectional rotating structure 11. A scraper 13 is provided at the outer end of each third connecting rod 12.

[0044] Specifically, to solve the problems of difficult cleaning, poor cleaning effect and low cleaning efficiency of vertical open axial flow pumps in the prior art; the cleaning device for vertical open axial flow pumps provided by the present invention can, after removing the upper drive mechanism 3 during the maintenance of the vertical open axial flow pump, sleave the first annular body 6 of the walking structure on the pump shaft 2. The walking structure contacts the pump shaft 2 through the driving wheel and can move the device downward. During this process, the angle between the second connecting rod 9 and the first connecting rod 8 can be adjusted through the first telescopic member 10, so that the third connecting rod 12 and the second connecting rod 9 can extend into the space between the first guide housing 4 and the second guide housing 5. And through the bidirectional rotation structure 11, the third connecting rod 12 can be rotated outward or inward to form an angle with the second connecting rod 9, so that the scraper 13 can contact the inner surface of the first guide housing 4 and the outer surface of the second guide housing 5. Then, the second annular body 7 can be driven by the driving member to drive the first connecting rod 8, the second connecting rod 9, the third connecting rod 12 and the scraper 13 to rotate, and the foreign matters attached to the inner surface of the first guide housing 4 and the outer surface of the second guide housing 5 can be scraped off along the circumferential direction by the scraper 13. Or the foreign matters attached to the inner surface of the first guide housing 4 and the outer surface of the second guide housing 5 can be scraped off along the vertical direction by the scraper 13 through the up-and-down movement of the walking structure, realizing the cleaning of the first guide housing 4 and the second guide housing 5 of the vertical open axial flow pump. The cleaning is convenient and fast, and the cleaning effect is good.

[0045] Optionally, the bidirectional rotation structure 11 includes:

[0046] The first connecting ear 14, one end of the first connecting ear 14 is telescopically embedded in the first chute on the second connecting rod 9;

[0047] The receiving groove is opened on the third connecting rod 12 and is used for receiving the first connecting ear 14. The first connecting ear 14 is hinged to both side walls of the receiving groove through the first pin shaft 15. When the first connecting ear 14 retracts, both side walls of the receiving groove can be butt-jointed with the plane of the second connecting rod 9;

[0048] The first connecting column 16 is fixed on the third connecting rod 12;

[0049] The second connecting column 17 is connected to the second connecting rod 9 through the second telescopic member 19 and can move along a direction perpendicular to the axis of the second connecting rod 9;

[0050] The first tension spring 18, both ends of the first tension spring 18 are respectively connected to the first connecting column 16 and the second connecting column 17 and are in a pre-tensioned state.

[0051] Specifically, as Figure 6As shown, one end of the second connecting rod 9 close to the third connecting rod 12 is provided with a first sliding groove. One end of the first connecting ear 14 is embedded in the first sliding groove, and the other end of the first connecting ear 14 is exposed. A telescopic rod 20 is arranged between the other end of the first connecting ear 14 and the bottom of the first sliding groove, so that the first connecting ear 14 can be telescopic; one end of the third connecting rod 12 close to the second connecting rod 9 is provided with a receiving groove. The first connecting ear 14 is located in the receiving groove and is hinged to the two side walls of the receiving groove; when the telescopic rod 20 drives the first connecting ear 14 to retract, the end faces of the two side walls of the receiving groove form a planar butt joint with the end face of the second connecting rod 9. At this time, the third connecting rod 12 cannot rotate, and at this time, the second connecting column 17 is on the axis of the second connecting rod 9, that is, the connection line between the two ends of the first tension spring 18 is parallel to the axes of the second connecting rod 9 and the third connecting rod 12; when it is necessary to use the scraper 13 to scrape off foreign matters on the inner surface of the first flow guiding housing 4, the telescopic rod 20 extends, driving the first connecting ear 14 to extend. At the same time, the second telescopic member 19 drives the second connecting column 17 to move towards the first flow guiding housing 4. At this time, the first tension spring 18 in the pre-tensioned state will pull the third connecting rod 12 to rotate, so that the scraper 13 contacts the inner surface of the first flow guiding housing 4. And due to the elastic force of the first tension spring 18, a certain pressure is formed between the scraper 13 and the first flow guiding housing 4, which is beneficial to improving the cleaning effect. And the existence of the first tension spring 18 enables the device to adaptively adjust the position of the scraper 13, so that the scraper 13 can always contact the first flow guiding housing 4 and maintain pressure. In this way, as the walking structure moves up and down, the scraper 13 can clean the inner surface of the first flow guiding housing 4 in circles. For the cleaning of the outer surface of the second flow guiding housing 5, it is the same as the cleaning of the inner surface of the first flow guiding housing 4, except that when the telescopic rod 20 extends, the second telescopic member 19 drives the second connecting column 17 to move towards the second flow guiding housing 5, and the elastic force of the first tension spring 18 is used to make the scraper 13 contact the outer surface of the second flow guiding housing 5, thereby realizing the cleaning of the outer surface of the second flow guiding housing 5.

[0052] In one example, if there are reinforcing rods 32 connecting the first flow guiding housing 4 and the second flow guiding housing 5, then the method of using the scraper 13 to scrape off the foreign matters attached to the inner surface of the first flow guiding housing 4 and the outer surface of the second flow guiding housing 5 along the circumferential direction can only achieve partial cleaning of the first flow guiding housing 4 and the second flow guiding housing 5; for the parts of the first flow guiding housing 4 and the second flow guiding housing 5 below the reinforcing rod 32, the foreign matters attached to the inner surface of the first flow guiding housing 4 and the outer surface of the second flow guiding housing 5 can be scraped off along the vertical direction by using the scraper 13. During the cleaning process, the walking structure is repeatedly moved up and down, and at the same time, before each downward movement, the driving component drives the second annular body 7 to rotate by a set angle, so that the scraper 13 can closely follow the path passed by the scraper 13 last time, so as to achieve the full cleaning of the first flow guiding housing 4 and the second flow guiding housing 5.

[0053] Optionally, the scraping blade 13 is a rectangular blade. One side of the scraping blade 13 is the cutting edge, and the other side is the back of the blade. A second connecting ear is provided in the middle of the back of the blade. The second connecting ear is hinged to the outer end of the third connecting rod 12 through a second pin shaft. First torsion springs and second torsion springs are respectively sleeved at both ends of the second pin shaft. The energy storage directions of the first torsion spring and the second torsion spring are opposite. When the scraping blade 13 is in a state without external force, the edge of the back of the blade of the scraping blade 13 is perpendicular to the axis of the third connecting rod 12.

[0054] Specifically, the second pin shaft is fixed on the second connecting ear and protrudes from both ends of the second connecting ear. A connecting groove is provided at the outer end of the third connecting rod 12. Through holes are provided on both side walls of the connecting groove. Both ends of the second pin shaft are rotatably connected in the through holes. The first torsion spring and the second torsion spring are respectively sleeved at both ends of the second pin shaft, and their energy storage directions are opposite. Both ends of the first torsion spring are respectively connected to the second pin shaft and one side wall of the connecting groove, and both ends of the second torsion spring are respectively connected to the second pin shaft and the other side wall of the connecting groove. In this way, the long side of the scraping blade 13 is perpendicular to the axis of the third connecting rod 12 in the natural state; in one example, a rotating assembly is provided in the middle of the third connecting rod 12. The rotating assembly can rotate a part of the third connecting rod 12 by 90° relative to another part of the third connecting rod 12. The rotating assembly can include a servo motor and a third worm and worm reducer; at this time, the device can clean by scraping the foreign matters attached to the inner surface of the first diversion housing 4 and the outer surface of the second diversion housing 5 along the vertical direction by using the scraping blade 13, ensuring the contact area between the cutting edge and the inner surface of the first diversion housing 4 and the outer surface of the second diversion housing 5, and further ensuring the cleaning efficiency. When the third connecting rod 12 rotates and one corner of the scraping blade 13 touches the inner surface of the first diversion housing 4, the scraping blade 13 rotates. The first torsion spring and the second torsion spring rotate in the directions of energy storage and energy release respectively, so that the cutting edge can touch the inner surface of the first diversion housing 4 and can be adaptively adjusted with the change of the inclination angle of the inner surface of the first diversion housing 4, ensuring the cleaning effect of the cutting edge; similarly, when the third connecting rod 12 rotates and the other corner of the scraping blade 13 touches the outer surface of the second diversion housing 5, the scraping blade 13 rotates in the opposite direction, and the cleaning effect of the cutting edge can also be ensured.

[0055] Optionally, the driving wheel is connected to the first worm and worm reducer and the first driving motor through a wheel shaft. The first driving motor is embedded in the first annular body 6. At least two driven wheels are also embedded in the inner circumference of the first annular body 6. The driven wheels and the driving wheel are evenly distributed on the outer circumference of the pump shaft 2.

[0056] Specifically, the forward and reverse rotations of the first drive motor can respectively drive the traveling structure to move downward and upward. The first worm and worm gear reducer is provided to endow the drive wheel with a self-locking characteristic, and it can only be rotated by the first drive motor. In this embodiment, two driven wheels and a drive wheel are arranged in a triangular pattern on the outer periphery of the pump shaft 2 to stably drive the traveling structure to move along the pump shaft 2.

[0057] Optionally, rubber layers are provided on the outer peripheries of the drive wheel and the driven wheels, and the rubber layers are in close contact with the outer periphery of the pump shaft 2.

[0058] Specifically, when the drive wheel and the driven wheels are in contact with the outer periphery of the pump shaft 2, the rubber layers are in a compressed state. On the one hand, it can increase the friction force between the drive wheel and the pump shaft 2 to ensure the stable operation of the traveling structure. On the other hand, it can weaken the influence of rust and the like on the outer periphery of the pump shaft 2 on its outer dimensions.

[0059] Optionally, the first annular body 6 includes a first inner ring 21, a second inner ring 22, and an outer ring 23. The first inner ring 21 and the second inner ring 22 are coaxially arranged. The drive wheel is embedded in the inner periphery of the first inner ring 21. A rotation limiting portion 24 and a third torsion spring 25 in a pre-torsion state are provided between the first inner ring 21 and the second inner ring 22. When the second inner ring 22 rotates relative to the first inner ring 21 in one direction, the third torsion spring 25 stores energy, and the rotation limiting portion 24 can limit the rotation of the second inner ring 22 in the other direction. A part of the outer ring 23 is sleeved on the outside of the first inner ring 21, and another part of the outer ring 23 is sleeved on the outside of the second inner ring 22. Guide ribs 26 are provided on the outer peripheries of the first inner ring 21 and the second inner ring 22, and guide grooves matching with the guide ribs 26 are provided on the inner periphery of the outer ring 23.

[0060] Specifically, as Figure 7As shown, in order to enable the device to also clean the impeller 1 of the vertical open axial flow pump, the first annular body 6 includes two inner rings, a first inner ring 21 and a second inner ring 22, and an outer ring 23. The first inner ring 21 and the second inner ring 22 are limited by a rotation limiting portion 24. The rotation limiting portion 24 may include a limiting groove arranged on the first inner ring 21 and a limiting protrusion arranged on the second inner ring 22. In the initial state, the third torsion spring 25 is in a pre-twisted state, i.e., a pre-energy storage state, and the limiting protrusion is at one end in the limiting groove. The outer ring 23 is sleeved on the outside of the first inner ring 21 and the second outer ring 23, and the first inner ring 21 and the second inner ring 22 are limited by the cooperation of the guide rib 26 and the guide groove. Since the impeller 1 of the vertical open axial flow pump is a curved surface, the upper surface of the impeller 1 is high on one side and low on the other side. When the scraper 13 is used to scrape vertically, the impeller 1 is provided with a plurality of inner rings 21 and 23, and the impeller 1 is provided with a plurality of inner rings 23 and a plurality of inner rings 23 are provided with a plurality of inner rings 23. When cleaning the impeller 1 in the manner of removing foreign matter on the upper surface of the impeller 1, as the second rod and the third rod drive the scraper 13 to move downward and cause the scraper 13 to move relative to the surface of the impeller 1, the straight rod structure formed by the second rod and the third rod will inevitably generate a torsional moment on the first rod. In order to eliminate such a torsional moment, the outer ring 23 can be moved downward when cleaning the upper surface of the impeller 1, so that it is separated from the first inner ring 21 and is only connected to the second inner ring 22. At this time, the torsional moment will drive the third torsion spring 25 to continue to store energy, so that the second annular body 7, the outer ring 23, and the second inner ring 22 rotate together with the descent of the scraper 13, and can be reset during the energy release process of the third torsion spring 25 as the scraper 13 rises, until it is limited by the rotation limit part 24, thereby achieving the cleaning of the impeller 1 and avoiding the damage of the device caused by the above-mentioned torsional moment.

[0061] Optionally, the outer ring 23 is connected to the first inner ring 21 via a third telescopic component 27 .

[0062] Specifically, the third telescopic component 27 can be used to drive the outer ring 23 to move relative to the first inner ring 21, so that the outer ring 23 is separated from the first inner ring 21 and connected to the second inner ring 22. After the impeller 1 is cleaned, the outer ring 23 can be driven to reset.

[0063] Optionally, the driving component includes a second worm gear reducer and a second drive motor, the second drive motor is fixed on the first annular body 6, the worm wheel of the second worm gear reducer is arranged on the second annular body 7, and the worm of the second worm gear reducer is connected to the output end of the second drive motor.

[0064] Specifically, the second drive motor drives the second annular body 7 to rotate relative to the first annular body 6 through the second worm gear reducer, and then drives the first connecting rod 8, the second connecting rod 9, the third connecting rod 12 and the scraper 13 to rotate relative to the pump shaft 2. The existence of the second worm gear reducer determines the direction of power transmission at this location, and the second annular body 7 cannot rotate freely.

[0065] Optionally, the third connecting rod 12 includes a first part 28 and a second part 29. One end of the first part 28 is provided with a plugging groove, and one end of the second part 29 is provided with a plugging portion 30. The plugging portion 30 is arranged in the plugging groove, and a pressure sensor 31 is arranged between the plugging portion 30 and the bottom of the plugging groove. A first straight gear 33 is arranged on the outer periphery of the plugging portion 30 near the pressure sensor 31, and a third driving motor 34 is arranged at the bottom of the plugging groove. The output end of the third driving motor 34 is connected with a second straight gear 36 through a third worm and worm gear reducer 35, and the second straight gear 36 meshes with the first straight gear 33.

[0066] Specifically, as Figure 8 shown, the plugging groove and the plugging portion 30 are clamped by a first clamping portion and a second clamping portion. During the downward movement of the scraper 13, if the scraper 13 moves along the first diversion housing 4 or the second diversion housing 5 to a position such as the flange connection of the housing, the detection result of the pressure sensor 31 will exceed the set pressure threshold. At this time, the traveling structure can be controlled to stop moving downward to avoid damaging the pump or the scraper 13.

[0067] Furthermore, for the convenience of adjusting the angle of the scraper 13, a third driving motor 34 is arranged in the plugging groove. The output end of the third driving motor 34 is connected with a second straight gear 36 through a third worm and worm gear reducer 35, and the second straight gear 36 meshes with the first straight gear 33. When the angle of the scraper 13 needs to be adjusted, the plugging portion 30 can be driven to rotate through the annular first straight gear 33 to ensure the contact area between the scraper 13 and the component to be cleaned.

[0068] Optionally, it further includes a control unit, which is used to control the driving wheels, the driving components and the first telescopic component 10 to operate.

[0069] Specifically, the control unit can control the driving wheels to operate to realize the movement of the device along the pump shaft 2. The control unit can control the first telescopic component 10 to expand and contract to adjust the included angle between the second connecting rod 9 and the first connecting rod 8, so that the third connecting rod 12 and the second connecting rod 9 can be smoothly inserted between the first diversion housing 4 and the second diversion housing 5. The control unit can also control the driving components to start, so that the second annular body 7 drives the first connecting rod 8, the second connecting rod 9, the third connecting rod 12 and the scraper 13 to rotate for cleaning work.

[0070] The embodiments of the present invention have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments.

Claims

1. A cleaning device for a vertical open axial flow pump, the vertical open axial flow pump comprising an impeller, a pump shaft and a driving mechanism sequentially arranged from bottom to top, a first guide housing extending upward and gradually expanding being arranged on the outer periphery of the impeller, and a second guide housing being arranged on the inner side of the upper part of the first guide housing, characterized in that, The device includes: A traveling structure, the traveling structure includes a first annular body, a driving wheel is embedded in the inner circumference of the first annular body, the first annular body can be sleeved on the pump shaft and contact the outer circumference of the pump shaft through the driving wheel; A second annular body, movably sleeved on the outer circumference of the first annular body, a driving component is arranged between the second annular body and the first annular body, and the driving component can drive the second annular body to rotate; A plurality of first connecting rods, radially connected to the outer circumference of the second annular body, a second connecting rod is hinged to the outer end of each first connecting rod, a first telescopic component is connected between the first connecting rod and the second connecting rod, and the first telescopic component is used to adjust the included angle between the second connecting rod and the first connecting rod. The outer end of each second connecting rod is connected to a third connecting rod through a bidirectional rotation structure, and a scraper is arranged at the outer end of each third connecting rod; The bidirectional rotation structure includes: A first connecting ear, one end of the first connecting ear is telescopically embedded in a first chute on the second connecting rod; A receiving groove, the receiving groove is opened on the third connecting rod and used to receive the first connecting ear, the first connecting ear is hinged to both side walls of the receiving groove through a first pin shaft. When the first connecting ear retracts, both side walls of the receiving groove can be butted against the plane of the second connecting rod; A first connecting column, fixed on the third connecting rod; A second connecting column, connected to the second connecting rod through a second telescopic component and can move along a direction perpendicular to the axis of the second connecting rod; A first tension spring, both ends of the first tension spring are respectively connected to the first connecting column and the second connecting column and are in a pre-tensioned state.

2. The cleaning device for a vertical open axial flow pump according to claim 1, characterized in that, The scraper is a rectangular blade, one side of the scraper is a cutting edge, the other side of the scraper is a blade back, a second connecting ear is arranged in the middle of the blade back, the second connecting ear is hinged to the outer end of the third connecting rod through a second pin shaft, and first torsion springs and second torsion springs are respectively sleeved at both ends of the second pin shaft. The energy storage directions of the first torsion spring and the second torsion spring are opposite. When the scraper is in a state without external force, the edge of the blade back of the scraper is perpendicular to the axis of the third connecting rod.

3. The cleaning device for a vertical open axial flow pump according to claim 1, characterized in that, The driving wheel is connected to a first worm and worm reducer and a first driving motor through a wheel shaft, the first driving motor is embedded in the first annular body, and at least two driven wheels are also embedded in the inner circumference of the first annular body. The driven wheels and the driving wheel are evenly distributed on the outer circumference of the pump shaft.

4. The cleaning device for a vertical open axial flow pump according to claim 3, characterized in that, Rubber layers are arranged on the outer circumferences of the driving wheel and the driven wheels, and the rubber layers are in close contact with the outer circumference of the pump shaft.

5. The cleaning device for a vertical open axial flow pump according to claim 1, characterized in that, The first annular body includes a first inner ring, a second inner ring and an outer ring. The first inner ring and the second inner ring are coaxially arranged. The driving wheel is embedded in the inner circumference of the first inner ring. A rotation limiting part and a third torsion spring in a pre-torsion state are arranged between the first inner ring and the second inner ring. When the second inner ring rotates relative to the first inner ring in one direction, the third torsion spring stores energy, and the rotation limiting part can limit the second inner ring from rotating in the other direction; a part of the outer ring is sleeved on the outside of the first inner ring, and another part of the outer ring is sleeved on the outside of the second inner ring. Guide ribs are arranged on the outer circumferences of the first inner ring and the second inner ring, and guide grooves matching with the guide ribs are arranged on the inner circumference of the outer ring.

6. The cleaning device for a vertical open axial flow pump according to claim 5, characterized in that, The outer ring is connected to the first inner ring through a third telescopic member.

7. The cleaning device for the vertical open axial flow pump according to claim 1, characterized in that, The driving component includes a second worm and gear reducer and a second driving motor. The second driving motor is fixed on the first annular body. The worm wheel of the second worm and gear reducer is arranged on the second annular body, and the worm of the second worm and gear reducer is connected to the output end of the second driving motor.

8. The cleaning device for the vertical open axial flow pump according to claim 1, characterized in that, The third connecting rod includes a first part and a second part. A plugging groove is arranged at one end of the first part, and a plugging part is arranged at one end of the second part. The plugging part is arranged in the plugging groove, and a pressure sensor is arranged between the plugging part and the bottom of the plugging groove. A first spur gear is arranged on the outer circumference of the plugging part close to the pressure sensor, and a third driving motor is arranged at the bottom of the plugging groove. The output end of the third driving motor is connected with a second spur gear through a third worm and gear reducer, and the second spur gear meshes with the first spur gear.

9. The cleaning device for a vertical open axial flow pump according to claim 1, characterized in that, It further includes a control unit, and the control unit is used to control the operation of the driving wheel, the driving component and the first telescopic member.

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