A centrifugal pump auxiliary device for anti-cavitation

Abstract

The invention relates to the technical field of centrifugal pump components, and discloses a centrifugal pump auxiliary device for preventing cavitation, comprising a base plate for supporting the centrifugal pump, a first mounting frame fixedly connected to the top right side of the base plate, a centrifugal pump body for conveying liquid fixedly connected to the top of the first mounting frame, an equipment main body is arranged at the top left side of the base plate, and the equipment main body comprises: a processing device, which is arranged on the top left side of the base plate, the processing device is used to process bubbles inside the water pumped out by the centrifugal pump body, to prevent the bubbles in the water from entering the centrifugal pump body to cause cavitation and thus damage the centrifugal pump body, thereby reducing the service life and conveying efficiency of the device, improving the service life and conveying efficiency of the device, and being convenient for users to use. The device has the advantages of improving the service life and conveying efficiency of the device, reducing the cost of the device, and being convenient for users to use.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal pump components, in particular to an auxiliary device of a centrifugal pump for preventing cavitation. Background Art

[0002] Centrifugal pumps use the centrifugal force generated by the high-speed rotation of the impeller to pump liquids or other materials. They are widely used in a large number of applications. In addition to industrial applications, centrifugal pumps are also widely used in agricultural irrigation, municipal water supply, power station circulating water supply, urban pollution treatment, etc.

[0003] Publication No.: CN216241499U discloses an anti-cavitation flow guide structure suitable for a centrifugal pump, characterized in that the anti-cavitation flow guide structure suitable for a centrifugal pump includes: a liquid flow guide structure and a bubble flow guide structure, the liquid flow guide structure is provided with a plurality of liquid flow guides located on the inner side of the shell, the bubble flow guide structure is provided with a plurality of bubble flow guides located on the back of the impeller, the liquid flow guide and the bubble flow guide protrude from the inner surface of the shell and the back of the impeller respectively, the liquid flow guide is in the reverse liquid flow direction, and gradually increases from the outside to the inside, and the device plays a role in inhibiting the generation of bubbles through the circulation supplement of the reflux. The fusion of the two structures can effectively improve the working efficiency and working life of the centrifugal pump, but in actual use, the device and the existing equipment can only inhibit the generation of bubbles, and there is no treatment measure for the generated bubbles entering the impeller to cause cavitation, resulting in the device still being seriously damaged after running for a period of time, and the device has further room for improvement in its ability to handle bubbles for cavitation. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a centrifugal pump auxiliary device for preventing cavitation, which has the advantages of improving the service life and conveying efficiency of the device, reducing the cost of the device, and facilitating user use.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an auxiliary device for a centrifugal pump for preventing cavitation, comprising: a base plate, a first mounting frame, a centrifugal pump body, an output rod, an impeller, a delivery pipe, a discharge pipe, an equipment body, a processing device, a second mounting frame, a water inlet pipe, a movable plate, a thorn column, a connecting pipe, a through rod, a screw, a first movable wheel, a first shaft rod, a driving device, a rotary driving assembly, a rotating shaft, a first toothed disc, a first return groove plate, a second shaft rod, a second toothed disc, a second movable wheel, a movable belt, a connecting rod, a first bevel gear, an auxiliary device, a movable disc, a rotating column, a fixed rod, a second bevel gear, a second return groove plate, a movable rod, a piston plate, a delivery bin, an injection pipe, a first one-way valve, an extraction pipe, a second one-way valve, and a guide pipe.

[0006] The positions and connection relationships of the above structures are as follows: An anti-cavitation centrifugal pump auxiliary device includes a bottom plate for supporting a centrifugal pump, a first mounting frame is fixedly connected to the top right side of the bottom plate, a centrifugal pump body for conveying liquid is fixedly connected to the top of the first mounting frame, and a device body is arranged on the top left side of the bottom plate, and the device body includes:

[0007] The processing device is arranged on the left side of the top of the bottom plate. The processing device is used to process the bubbles in the water pumped out by the centrifugal pump body to prevent the bubbles in the water from entering the centrifugal pump body and causing cavitation, thereby damaging the centrifugal pump body, thereby reducing the service life and conveying efficiency of the device, improving the service life and conveying efficiency of the device, and facilitating the use of users;

[0008] The driving device is fixedly connected to the top of the processing device. The driving device is used to provide power for the start and stop of each component. At the same time, the driving device can also cooperate with subsequent components to increase the liquid flow pressure of the centrifugal pump body during operation, thereby increasing the service life and delivery efficiency of the device and facilitating user use;

[0009] The auxiliary device is arranged at the bottom of the driving device. The auxiliary device is used to cooperate with the driving device to increase the liquid flow pressure inside the centrifugal pump body, so as to avoid the phenomenon that the internal liquid flow pressure of the centrifugal pump body is low when the centrifugal pump body is running, which leads to a large number of bubbles in the water. The bubbles collide with the inside of the centrifugal pump body and cause cavitation, thereby reducing the efficiency of the device in conveying water, thereby improving the service life and conveying efficiency of the device and facilitating user use.

[0010] Preferably, the base plate also includes an output rod, which is fixedly connected to the left output end of the centrifugal pump body, the end of the output rod away from the centrifugal pump body is fixedly connected to the impeller, a delivery pipe is provided on the outer surface of the output rod, the right end surface of the delivery pipe is fixedly connected to the left end of the centrifugal pump body, the top of the delivery pipe is fixedly connected to a discharge pipe, and the discharge pipe is provided on the top of the impeller to ensure normal operation of the device.

[0011] Preferably, the processing device includes a second mounting frame, which is fixedly connected to the top left side of the base plate. The processing device is configured as a longitudinally placed rectangular tube. A water inlet pipe is fixedly connected to the top side of the left end surface of the processing device, and a connecting pipe is fixedly connected to the bottom side of the right end surface of the processing device. A movable plate is provided inside the processing device, and the shape and size of the movable plate are compatible with the processing device. A number of barbed columns are fixedly connected to the bottom of the movable plate to ensure normal operation of the device.

[0012] Preferably, the processing device also includes a through rod, which is fixedly connected to the top of the movable plate. The through rod passes through the processing device and extends to the outside of the top of the processing device. A screw is provided on the top of the through rod, and the screw is threadedly connected to the through rod. The top of the screw is fixedly connected to a first movable wheel, and the top of the first movable wheel is fixedly connected to a first shaft rod. The top of the first shaft rod is rotatably connected to the inner wall of the top side of the driving device. The first shaft rod, the first movable wheel and the screw rod are all arranged inside the driving device to ensure the normal operation of the device.

[0013] Preferably, the driving device includes a rotary drive assembly, which is fixedly connected at the center of the top inner wall of the driving device. The rotary drive assembly is configured as a driving motor. A rotating shaft is fixedly connected to the bottom output end of the rotary drive assembly. A first gear disk is fixedly connected to one end of the rotating shaft away from the rotary drive assembly. The first gear disk is only provided with half-side latching teeth to ensure normal operation of the device.

[0014] Preferably, the driving device also includes a first return groove plate, which is arranged on the outer surface of the first toothed disc, and a plurality of latching teeth are fixedly connected to the inside of the first return groove plate. The first return groove plate is meshingly connected to the first toothed disc, and a plurality of latching teeth are fixedly connected to the right end surface of the first return groove plate, and the number of teeth therein is greater than the number of teeth on the inner wall of the right end of the first return groove plate. The first return groove plate is limited in the driving device to ensure the normal operation of the device.

[0015] Preferably, the driving device also includes a second shaft rod, which is rotatably connected to the inner wall of the top side of the driving device, and the second shaft rod is arranged on the right side of the rotation driving assembly, the first shaft rod is arranged on the left side of the rotation driving assembly, and a second gear plate is fixedly connected to the outer surface of the second shaft rod, the second gear plate is meshingly connected to the right end surface of the first return groove plate, a second movable wheel is fixedly connected to the bottom of the second shaft rod, a movable belt is movably connected to the outer surfaces of the first movable wheel and the second movable wheel, a connecting rod is fixedly connected to the bottom of the second movable wheel, and the end of the connecting rod away from the second movable wheel is fixedly connected to the first bevel gear to ensure normal operation of the device.

[0016] Preferably, the auxiliary device is configured as an annular sealing chamber, the auxiliary device includes two movable disks, which are respectively arranged on the front and rear sides of the top of the auxiliary device, the two movable disks are respectively arranged on the front and rear ends of the first bevel gear, the two movable disks are fixedly connected to a fixing rod at one end close to the first bevel gear, the fixed rod is fixedly connected to a second bevel gear at one end away from the movable disk, the second bevel gear is meshingly connected to the first bevel gear, the two movable disks are fixedly connected to a rotating column at one end away from the fixed rod, and a second return groove plate is movably connected to the outer surface of the rotating column to ensure normal operation of the device.

[0017] Preferably, the auxiliary device also includes two movable rods, which are respectively fixedly connected to the bottom of the two second return groove plates, and a conveying bin is provided at the bottom of the movable rod. The movable rod extends to the interior of the conveying bin and a piston plate is fixedly connected to the extended part of the movable rod. The left end of the conveying bin is fixedly connected to an extraction pipe, and the other end of the extraction pipe is fixedly connected to the right side surface of the processing device. A second one-way valve is fixedly connected to the connection between the extraction pipe and the conveying bin to ensure the normal operation of the device.

[0018] Preferably, the auxiliary device also includes two injection pipes, which are respectively fixedly connected to the bottom of the two conveying bins, and the other end of the injection pipe is fixedly connected to the top of the auxiliary device. A first one-way valve is fixedly connected to the connection between the injection pipe and the conveying bin. One end of the auxiliary device close to the impeller is obliquely fixedly connected with a plurality of guide pipes, and the inclination direction of the guide pipes is toward the edge of the impeller to ensure the normal operation of the device.

[0019] Beneficial Effects

[0020] 1. The centrifugal pump auxiliary device for preventing cavitation improves the transportation efficiency of the device by opening the processing device to assist the impeller in transporting water. At the same time, the device punctures the floating bubbles and extracts water only from the lower layer of the processing device without bubbles to avoid bubbles hitting the impeller surface to cause cavitation, thereby improving the service life and transportation efficiency of the device and facilitating user use.

[0021] 2. The auxiliary device for the centrifugal pump used to prevent cavitation increases the liquid inlet pressure of the impeller by opening the auxiliary device, so as to avoid the phenomenon that a large number of bubbles are easily generated in the water due to the low internal liquid flow pressure of the centrifugal pump body during operation, and the bubbles collide with the inside of the centrifugal pump body to cause cavitation, thereby reducing the efficiency of the device in conveying water, improving the service life and conveying efficiency of the device, and facilitating user use.

[0022] 3. The centrifugal pump auxiliary device for preventing cavitation uses only one driving source to puncture bubbles, assist the impeller in conveying water, and increase the impeller liquid inlet pressure by turning on the driving device, thereby reducing the cost of the device and improving the compactness of the device structure, making its operation more stable and convenient for users to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the appearance structure of a centrifugal pump auxiliary device for preventing cavitation according to the present invention;

[0024] Figure 2 It is a schematic diagram of the side structure of a centrifugal pump auxiliary device for preventing cavitation according to the present invention;

[0025] Figure 3 This is a schematic diagram of the internal structure of a centrifugal pump auxiliary device for preventing cavitation according to the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of a centrifugal pump auxiliary device processing device for anti-cavitation of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the first return groove plate of a centrifugal pump auxiliary device for preventing cavitation according to the present invention;

[0028] Figure 6 This is a schematic diagram of the second shaft structure of an auxiliary device for a centrifugal pump for preventing cavitation according to the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the second bevel gear of an auxiliary device for a centrifugal pump for preventing cavitation according to the present invention;

[0030] Figure 8 This is a schematic structural diagram of an auxiliary device of a centrifugal pump for preventing cavitation according to the present invention.

[0031] In the figure: 1, bottom plate; 10, first mounting frame; 11, centrifugal pump body; 110, output rod; 111, impeller; 12, delivery pipe; 120, discharge pipe; 2, equipment body; 3, processing device; 30, second mounting frame; 300, water inlet pipe; 31, movable plate; 310, thorn column; 32, connecting pipe; 33, through rod; 330, screw; 34, first movable wheel; 35, first shaft; 4, driving device; 40, rotary driving assembly; 41, rotating shaft; 410, first toothed disc; 41 1. First return groove plate; 42. Second shaft rod; 420. Second gear plate; 43. Second movable wheel; 430. Movable belt; 44. Connecting rod; 45. First bevel gear; 5. Auxiliary device; 50. Movable plate; 500. Rotating column; 501. Fixed rod; 502. Second bevel gear; 51. Second return groove plate; 510. Movable rod; 511. Piston plate; 52. Delivery bin; 520. Injection pipe; 521. First one-way valve; 522. Extraction pipe; 523. Second one-way valve; 53. Guide pipe. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1

[0034] See also Figures 1 to 8, an anti-cavitation centrifugal pump auxiliary device, comprising a base plate 1 for supporting a centrifugal pump, a first mounting frame 10 is fixedly connected to the top right side of the base plate 1, a centrifugal pump body 11 for conveying liquid is fixedly connected to the top of the first mounting frame 10, and a device body 2 is arranged on the top left side of the base plate 1, and the device body 2 comprises:

[0035] The processing device 3 is arranged on the top left side of the bottom plate 1. The processing device 3 is used to process the bubbles in the water pumped out by the centrifugal pump body 11 to prevent the bubbles in the water from entering the centrifugal pump body 11 and causing cavitation, thereby damaging the centrifugal pump body 11, thereby reducing the service life and conveying efficiency of the device, improving the service life and conveying efficiency of the device, and facilitating the use of the user;

[0036] The driving device 4 is fixedly connected to the top of the processing device 3. The driving device 4 is used to provide power for the start and stop of each component. At the same time, the driving device 4 can also cooperate with subsequent components to increase the liquid flow pressure of the centrifugal pump body 11 during operation, thereby increasing the service life and delivery efficiency of the device and facilitating user use;

[0037] The auxiliary device 5 is arranged at the bottom of the driving device 4. The auxiliary device 5 is used to cooperate with the driving device 4 to increase the liquid flow pressure inside the centrifugal pump body 11, so as to avoid the phenomenon that the internal liquid flow pressure of the centrifugal pump body 11 is small when the centrifugal pump body 11 is running, which leads to a large number of bubbles in the water. The bubbles collide with the inside of the centrifugal pump body 11 and cause cavitation, thereby reducing the efficiency of the device in conveying water, thereby improving the service life and conveying efficiency of the device and facilitating user use.

[0038] The base plate 1 also includes an output rod 110, which is fixedly connected to the left output end of the centrifugal pump body 11. The end of the output rod 110 away from the centrifugal pump body 11 is fixedly connected to the impeller 111. A delivery pipe 12 is arranged on the outer surface of the output rod 110. The right end surface of the delivery pipe 12 is fixedly connected to the left end of the centrifugal pump body 11. The top of the delivery pipe 12 is fixedly connected to a discharge pipe 120. The discharge pipe 120 is arranged on the top of the impeller 111 to ensure the normal operation of the device.

[0039] The processing device 3 includes a second mounting frame 30, which is fixedly connected to the top left side of the base plate 1. The processing device 3 is configured as a longitudinally placed rectangular tube. A water inlet pipe 300 is fixedly connected to the top side of the left end surface of the processing device 3, and a connecting pipe 32 is fixedly connected to the bottom side of the right end surface of the processing device 3. A movable plate 31 is arranged inside the processing device 3. The shape and size of the movable plate 31 are adapted to the processing device 3. A plurality of spiked columns 310 are fixedly connected to the bottom of the movable plate 31 to ensure the normal operation of the device.

[0040] The processing device 3 also includes a through rod 33, which is fixedly connected to the top of the movable plate 31. The through rod 33 passes through the processing device 3 and extends to the outside of the top of the processing device 3. A screw rod 330 is arranged on the top of the through rod 33. The screw rod 330 is threadedly connected to the through rod 33. The top of the screw rod 330 is fixedly connected to the first movable wheel 34. The top of the first movable wheel 34 is fixedly connected to the first shaft rod 35. The top of the first shaft rod 35 is rotatably connected to the inner wall of the top side of the driving device 4. The first shaft rod 35, the first movable wheel 34 and the screw rod 330 are all arranged inside the driving device 4 to ensure the normal operation of the device.

[0041] Embodiment 2

[0042] See also Figures 1 to 8 On the basis of the first embodiment, the driving device 4 includes a rotating driving component 40, which is fixedly connected to the center of the top inner wall of the driving device 4. The rotating driving component 40 is configured as a driving motor. A rotating shaft 41 is fixedly connected to the bottom output end of the rotating driving component 40. A first toothed disc 410 is fixedly connected to one end of the rotating shaft 41 away from the rotating driving component 40. The first toothed disc 410 is only provided with half of the teeth to ensure the normal operation of the device.

[0043] The driving device 4 also includes a first return groove plate 411, which is arranged on the outer surface of the first toothed disc 410. A plurality of latching teeth are fixedly connected inside the first return groove plate 411. The first return groove plate 411 is meshingly connected with the first toothed disc 410. A plurality of latching teeth are fixedly connected on the right end surface of the first return groove plate 411, and the number of teeth therein is greater than the number of teeth on the right end inner wall of the first return groove plate 411. The first return groove plate 411 is limited in the driving device 4 to ensure the normal operation of the device.

[0044] The driving device 4 also includes a second shaft rod 42, which is rotatably connected to the inner wall of the top side of the driving device 4, and the second shaft rod 42 is arranged on the right side of the rotation driving assembly 40, and the first shaft rod 35 is arranged on the left side of the rotation driving assembly 40. A second gear plate 420 is fixedly connected to the outer surface of the second shaft rod 42, and the second gear plate 420 is meshingly connected to the right end surface of the first return groove plate 411. A second movable wheel 43 is fixedly connected to the bottom of the second shaft rod 42, and a movable belt 430 is movably connected to the outer surfaces of the first movable wheel 34 and the second movable wheel 43. The bottom of the second movable wheel 43 is fixedly connected to a connecting rod 44, and the end of the connecting rod 44 away from the second movable wheel 43 is fixedly connected to the first bevel gear 45 to ensure the normal operation of the device.

[0045] Embodiment 3

[0046] See also Figures 1 to 8On the basis of the second embodiment, the auxiliary device 5 is further configured as an annular sealing chamber, and the auxiliary device 5 includes two movable disks 50, which are respectively arranged on the front and rear sides of the top of the auxiliary device 5, and the two movable disks 50 are respectively arranged at the front end and the rear end of the first bevel gear 45, and the ends of the two movable disks 50 close to the first bevel gear 45 are fixedly connected with a fixed rod 501, and the ends of the fixed rod 501 away from the movable disk 50 are fixedly connected with a second bevel gear 502, and the second bevel gear 502 is meshed with the first bevel gear 45. The ends of the two movable disks 50 away from the fixed rod 501 are fixedly connected with a rotating column 500, and the outer surface of the rotating column 500 is movably connected with a second return groove plate 51 to ensure the normal operation of the device.

[0047] The auxiliary device 5 also includes two movable rods 510, which are respectively fixedly connected to the bottom of the two second return groove plates 51. A conveying bin 52 is arranged at the bottom of the movable rod 510. The movable rod 510 extends to the interior of the conveying bin 52 and a piston plate 511 is fixedly connected to the extended part of the movable rod 510. An extraction pipe 522 is fixedly connected to the left end of the conveying bin 52. The other end of the extraction pipe 522 is fixedly connected to the right side surface of the processing device 3. A second one-way valve 523 is fixedly connected to the connection between the extraction pipe 522 and the conveying bin 52 to ensure the normal operation of the device.

[0048] The auxiliary device 5 also includes two injection pipes 520, which are respectively fixedly connected to the bottom of the two conveying bins 52. The other end of the injection pipe 520 is fixedly connected to the top of the auxiliary device 5. A first one-way valve 521 is fixedly connected to the connection between the injection pipe 520 and the conveying bin 52. One end of the auxiliary device 5 close to the impeller 111 is obliquely fixedly connected with a plurality of guide pipes 53, and the inclination direction of the guide pipes 53 is toward the edge of the impeller 111, so as to ensure the normal operation of the device.

[0049] Working principle: the centrifugal pump body 11 is turned on, the centrifugal pump body 11 is turned on to drive the output rod 110 to rotate, the output rod 110 rotates to drive the impeller 111 to rotate, the impeller 111 rotates to transport the external water to the delivery pipe 12 through the water inlet pipe 300 under the action of centrifugal force, in this process, the rotary drive component 40 inside the driving device 4 is turned on, the rotary drive component 40 is turned on to drive the rotating shaft 41 to rotate, the rotating shaft 41 rotates to drive the first toothed disc 410 to rotate, because the first toothed disc 410 is only provided with half of the teeth, at this time, the rotation of the first toothed disc 410 can drive the first return groove plate 411 to rotate in the driving device 4. The first return groove plate 411 makes a reciprocating linear motion in the driving device 4, and the linear reciprocating motion of the first return groove plate 411 drives the second toothed disc 420 to rotate through the latching teeth on its right side surface. Since the number of teeth on the right side surface of the first return groove plate 411 is greater than the latching teeth on the right inner wall of the first return groove plate 411, each linear reciprocating motion of the first return groove plate 411 will drive the second toothed disc 420 to rotate several circles and then rotate several circles to reset. The movement of the second toothed disc 420 drives the second movable wheel 43 to rotate through the second shaft rod 42, and the rotation of the second movable wheel 43 drives the first movable wheel 34 to rotate through the movable belt 430, and the first movable wheel 34 rotates through the second shaft rod 42. A shaft 35 drives the screw 330 to rotate, and the rotation of the screw 330 drives the through rod 33 to move downward, and the movement of the through rod 33 drives the movable plate 31 and the thorn column 310 to move downward inside the treatment device 3. The screw 330 and the through rod 33 are limited in size so that they can only drive the movable plate 31 and the thorn column 310 to move to the middle of the treatment device 3. Since the water passes through the treatment device 3 first before entering the delivery pipe 12, the water enters the treatment device 3 from the water inlet pipe 300 and accumulates. Since the density of air in water is relatively small, bubbles gradually float to the top of the water surface during the continuous accumulation of water, and the top of the bubbles is supported by the movable plate 3. 1. The thorn column 310 presses down to puncture, and the centrifugal force generated by the rotation of the impeller 111 extracts water from the treatment device 3 through the connecting pipe 32 and transports it to the auxiliary device 5 and the delivery pipe 12. The downward pressure of the movable plate 31 and the thorn column 310 can also press the water through the connecting pipe 32 to the auxiliary device 5 and the delivery pipe 12. The auxiliary impeller 111 transports the water, improving the transportation efficiency of the device. At the same time, the device punctures the floating bubbles and extracts water. Only the water without bubbles in the lower layer of the treatment device 3 is extracted to avoid bubbles hitting the surface of the impeller 111 to cause cavitation, thereby improving the service life and transportation efficiency of the device and facilitating user use;

[0050] When the second movable wheel 43 rotates, the first bevel gear 45 is driven to rotate through the connecting rod 44, and the rotation of the first bevel gear 45 drives the two second bevel gears 502 to rotate. The rotation of the second bevel gear 502 drives the movable plate 50 and the rotating column 500 to rotate through the fixed rod 501. The rotation of the rotating column 500 drives the second return groove plate 51 to make a linear reciprocating motion. The movement of the second return groove plate 51 drives the movable rod 510 and the piston plate 511 to make a linear reciprocating motion, and the two piston plates 511 reciprocate linearly each time. The movement direction is opposite. The movement of the piston plate 511 causes the air pressure in the delivery chamber 52 to change. When the piston plate 511 moves upward, the air pressure in the delivery chamber 52 changes, and the water in the treatment device 3 is extracted into the delivery chamber 52 through the extraction pipe 522. The second one-way valve 523 is used to prevent the water in the auxiliary device 5 from flowing back. When the piston plate 511 moves downward, the air pressure in the delivery chamber 52 increases, and the water is transported to the auxiliary device 5 through the injection pipe 520. The first one-way valve 521 is used to prevent the water from flowing back into the treatment device 3. After the interior is filled with water, a portion of the water can be sprayed from the plurality of guide pipes 53 to the edge of the impeller 111 through the spray pipe 520. Since the movement directions of the piston plates 511 inside the two delivery chambers 52 are opposite, the auxiliary device 5 can always spray water flow to the edge of the impeller 111 through the guide pipe to apply pressure. By spraying a fluid with a certain pressure to the impeller 111, the pressure on the outer edge of the impeller 111 blade and the pressure of the liquid flow entering the impeller 111 are increased, and the necessary cavitation margin of the centrifugal pump is reduced, thereby avoiding cavitation. Through the rotation of the impeller 111, most of the water enters the delivery pipe 12 through the connecting pipe 32 and the auxiliary device 5, and then the delivery pipe 12 delivers the water to the discharge pipe 120. In this way, the device avoids the problem that the internal liquid flow pressure of the centrifugal pump body 11 is small during operation, which makes it easy for the water to generate a large number of bubbles therein, and the bubbles collide with the inside of the centrifugal pump body 11 to cause cavitation, thereby reducing the efficiency of the device in delivering water, improving the service life and delivery efficiency of the device, and facilitating user use.

[0051] When running the above steps, the device only uses one driving source to complete the steps of puncturing the bubbles, assisting the impeller 111 in delivering water and increasing the liquid inlet pressure of the impeller 111, thereby reducing the cost of the device and improving the compactness of the device structure, making its operation more stable and convenient for users to use.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An auxiliary device for a centrifugal pump for preventing cavitation, comprising a base plate (1) for supporting a centrifugal pump, characterized in that: A first mounting frame (10) is fixedly connected to the right side of the top of the base plate (1), a centrifugal pump body (11) for conveying liquid is fixedly connected to the top of the first mounting frame (10), and a device body (2) is arranged on the left side of the top of the base plate (1), the device body (2) comprising: A processing device (3) is arranged on the left side of the top of the bottom plate (1), and is used to process bubbles in the water pumped out by the centrifugal pump body (11), so as to prevent the bubbles in the water from entering the centrifugal pump body (11) and causing cavitation, thereby damaging the centrifugal pump body (11), thereby reducing the service life and conveying efficiency of the device, and improving the service life and conveying efficiency of the device, so as to facilitate use by users; The processing device (3) comprises a second mounting frame (30) which is fixedly connected to the left side of the top of the bottom plate (1); the processing device (3) is arranged as a rectangular tube placed longitudinally; a water inlet pipe (300) is fixedly connected to the top side of the left end surface of the processing device (3); a connecting pipe (32) is fixedly connected to the bottom side of the right end surface of the processing device (3); a movable plate (31) is arranged inside the processing device (3); the shape and size of the movable plate (31) are compatible with those of the processing device (3); and a plurality of thorn columns (310) are fixedly connected to the bottom of the movable plate (31); The processing device (3) further comprises a through rod (33) which is fixedly connected to the top of the movable plate (31); the through rod (33) passes through the processing device (3) and extends to the outside of the top of the processing device (3); a screw rod (330) is arranged at the top of the through rod (33); the screw rod (330) is threadedly connected to the through rod (33); a first movable wheel (34) is fixedly connected to the top of the screw rod (330); a first shaft rod (35) is fixedly connected to the top of the first movable wheel (34); the top of the first shaft rod (35) is rotatably connected to the inner wall of the top side of the driving device (4); the first shaft rod (35), the first movable wheel (34) and the screw rod (330) are all arranged inside the driving device (4); A driving device (4) is fixedly connected to the top of the processing device (3). The driving device (4) is used to provide power for starting and stopping each component. At the same time, the driving device (4) can also cooperate with subsequent components to increase the liquid flow pressure of the centrifugal pump body (11) during operation, thereby increasing the service life and delivery efficiency of the device and facilitating user use. The driving device (4) comprises a rotary drive assembly (40) which is fixedly connected to the center of the top inner wall of the driving device (4); the rotary drive assembly (40) is configured as a driving motor; a rotating shaft (41) is fixedly connected to the bottom output end of the rotary drive assembly (40); an end of the rotary shaft (41) away from the rotary drive assembly (40) is fixedly connected to a first toothed disc (410); and the first toothed disc (410) is provided with only half of the latching teeth; The driving device (4) further comprises a first return groove plate (411), which is arranged on the outer surface of the first toothed disc (410); a plurality of latching teeth are fixedly connected inside the first return groove plate (411); the first return groove plate (411) is meshingly connected with the first toothed disc (410); a plurality of latching teeth are fixedly connected on the right end surface of the first return groove plate (411); and the number of teeth therein is greater than the number of teeth on the right end inner wall of the first return groove plate (411); and the first return groove plate (411) is limited in position inside the driving device (4); The driving device (4) further comprises a second shaft (42) which is rotatably connected to the inner wall of the top side of the driving device (4), and the second shaft (42) is arranged on the right side of the rotary driving assembly (40), and the first shaft (35) is arranged on the left side of the rotary driving assembly (40); a second toothed disc (420) is fixedly connected to the outer surface of the second shaft (42), and the second toothed disc (420) is meshingly connected to the right end surface of the first return groove plate (411); a second movable wheel (43) is fixedly connected to the bottom of the second shaft (42); a movable belt (430) is movably connected to the outer surfaces of the first movable wheel (34) and the second movable wheel (43); a connecting rod (44) is fixedly connected to the bottom of the second movable wheel (43); and a first bevel gear (45) is fixedly connected to the end of the connecting rod (44) away from the second movable wheel (43); An auxiliary device (5) is arranged at the bottom of the driving device (4), and is used to cooperate with the driving device (4) to increase the pressure of the liquid flow inside the centrifugal pump body (11), so as to avoid the phenomenon that a large number of bubbles are easily generated in the water due to the low pressure of the liquid flow inside the centrifugal pump body (11) when the centrifugal pump body (11) is running, and the bubbles collide with the inside of the centrifugal pump body (11) to cause cavitation, thereby reducing the efficiency of the device in conveying water, thereby increasing the service life and conveying efficiency of the device, and facilitating use by users; The auxiliary device (5) is configured as an annular sealing chamber. The auxiliary device (5) comprises two movable disks (50), which are respectively arranged at the front side and the rear side of the top of the auxiliary device (5). The two movable disks (50) are respectively arranged at the front end and the rear end of the first bevel gear (45). One end of the two movable disks (50) close to the first bevel gear (45) is fixedly connected to a fixing rod (501). One end of the fixing rod (501) away from the movable disk (50) is fixedly connected to a second bevel gear (502). The second bevel gear (502) is meshingly connected to the first bevel gear (45). One end of the two movable disks (50) away from the fixing rod (501) is fixedly connected to a rotating column (500). A second return groove plate (51) is movably connected to the outer surface of the rotating column (500). The auxiliary device (5) further comprises two movable rods (510), which are respectively fixedly connected to the bottom of the two second return groove plates (51); a delivery bin (52) is arranged at the bottom of the movable rod (510); the movable rod (510) extends into the interior of the delivery bin (52); and a piston plate (511) is fixedly connected to the extended portion of the movable rod (510); an extraction pipe (522) is fixedly connected to the left end of the delivery bin (52); the other end of the extraction pipe (522) is fixedly connected to the right side surface of the processing device (3); and a second one-way valve (523) is fixedly connected to the connection between the extraction pipe (522) and the delivery bin (52); The auxiliary device (5) further comprises two injection pipes (520), which are respectively fixedly connected to the bottoms of the two conveying bins (52); the other ends of the injection pipes (520) are fixedly connected to the top of the auxiliary device (5); a first one-way valve (521) is fixedly connected to the connection between the injection pipes (520) and the conveying bins (52); and a plurality of guide pipes (53) are fixedly connected at an angle to one end of the auxiliary device (5) close to the impeller (111), and the inclination direction of the guide pipes (53) faces the edge of the impeller (111).

2. The centrifugal pump auxiliary device for preventing cavitation according to claim 1, characterized in that: The bottom plate (1) further comprises an output rod (110) fixedly connected to the left output end of the centrifugal pump body (11); one end of the output rod (110) away from the centrifugal pump body (11) is fixedly connected to the impeller (111); a delivery pipe (12) is arranged on the outer surface of the output rod (110); the right end surface of the delivery pipe (12) is fixedly connected to the left end of the centrifugal pump body (11); the top of the delivery pipe (12) is fixedly connected to a discharge pipe (120); and the discharge pipe (120) is arranged on the top of the impeller (111).

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