CN110821893A

CN110821893A - Centrifugal pump with pump cover convenient to replace and using method

Info

Publication number: CN110821893A
Application number: CN201911293079.0A
Authority: CN
Inventors: 黄秀琼
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-02-21

Abstract

The invention discloses a centrifugal pump convenient for replacing a pump cover and a using method thereof. The centrifugal pump cover has the advantages of being convenient to disassemble the pump cover and the impeller and filtering impurities in liquid, and solves the problems that most of pump covers of existing centrifugal pumps are fixedly welded and can not be disassembled, so that the impeller in the interior of the centrifugal pump can not be disassembled, maintenance cost is increased, impurities in conveying liquid can not be filtered, the impurities enter the interior of the centrifugal pump, the centrifugal pump is easy to block, and the centrifugal pump is inconvenient to use.

Description

Centrifugal pump with pump cover convenient to replace and using method

Technical Field

The invention relates to the technical field of centrifugal pumps, in particular to a centrifugal pump with a pump cover convenient to replace and a using method thereof.

Background

The centrifugal pump works by utilizing the centrifugal motion of water generated by the rotation of an impeller, before the water pump is started, a pump shell and a water suction pipe are filled with water, then a motor is started, a pump shaft drives the impeller and the water to rotate at a high speed, the water generates the centrifugal motion and is thrown to the outer edge of the impeller and flows into a water pressing pipeline of the water pump through a flow channel of a volute pump shell, the basic structure of the centrifugal pump is that the centrifugal pump consists of six parts, namely the impeller, a pump body, the pump shaft, a bearing, a sealing ring and a packing box, the impeller is a core part of the centrifugal pump and has high rotating speed and high output, blades on the impeller play a main role, and the impeller passes through a static balance experiment before being assembled. The inner and outer surfaces on the impeller are required to be smooth so as to reduce the friction loss of water flow; the pump body is also called pump shell, and is the main body of the water pump. The supporting and fixing function is realized, and the supporting and fixing device is connected with a bracket for mounting the bearing.

The existing centrifugal pump cover is mainly fixedly welded and cannot be detached, so that the impeller inside the centrifugal pump cannot be detached, the maintenance cost is increased, impurities in conveying liquid cannot be filtered, the impurities enter the inside of the centrifugal pump, the centrifugal pump is easily blocked, and people cannot use the centrifugal pump conveniently.

Disclosure of Invention

The invention aims to provide a centrifugal pump with a pump cover convenient to replace and a using method thereof, which have the advantages of being convenient to disassemble the pump cover and an impeller and filtering impurities in liquid, and solve the problems that most pump covers of the existing centrifugal pump are fixedly welded and can not be disassembled, so that the impeller in the centrifugal pump can not be disassembled, the maintenance cost is increased, the impurities in the conveyed liquid can not be filtered, the impurities enter the interior of the centrifugal pump, the centrifugal pump is easy to block, and the use of people is inconvenient.

In order to achieve the purpose, the invention provides the following technical scheme: a centrifugal pump convenient for replacing a pump cover comprises a pump body, wherein a first fixed block is fixedly connected to the surface of the pump body in the circumferential direction, a threaded hole is formed in the surface of the first fixed block, a water inlet pipe is communicated with the left side of the pump body, a water outlet pipe is communicated with the right side of the pump body, the pump cover is arranged on the front side of the pump body, a second fixed block is fixedly connected to the surface of the pump cover in the circumferential direction, a bolt penetrates through the front side of the second fixed block, the rear end of the bolt sequentially penetrates through the second fixed block and the threaded hole and extends to the outside of the threaded hole, the bolt is in threaded connection with the threaded hole, a rotating rod penetrates through the rear side of the pump body, the front end of the rotating rod penetrates through the inner cavity of the pump body and is fixedly connected with a connecting plate, a threaded rod is fixedly connected to the front side of, the blade is fixedly connected to the front side of the disc, the filter frame is arranged in the inner cavity of the water inlet pipe, a circular ring is fixedly sleeved on the surface of the filter frame, clamping grooves are formed in the top and the bottom of the circular ring, grooves are formed in the top and the bottom of the inner cavity of the water inlet pipe, a first spring is fixedly connected to the inner wall of each groove, a clamping rod is fixedly connected to one end, away from the inner wall of each groove, of each first spring, one end, away from the corresponding first spring, of each clamping rod extends to the inner cavity of each clamping groove, long holes are formed in the top and the bottom of the left side of the inner wall of the water inlet pipe, the long holes are communicated with the grooves, a moving rod is fixedly connected to the left side of each clamping rod, the left end of each moving rod penetrates through the corresponding long hole and extends to the left side of the corresponding long, the bottom fixedly connected with second spring of montant, the bottom of second spring and the bottom fixed connection of sleeve pipe inner chamber, sheathed tube bottom fixedly connected with bottom plate.

Preferably, the rear end fixedly connected with belt pulley of bull stick, the mounting hole has been seted up at the top of bottom plate, the quantity of mounting hole is four, the bull stick passes through sealed bearing and pump body swing joint.

Preferably, the locating holes are formed in the two sides of the top of the disc, the locating rods are fixedly connected to the two sides of the bottom of the connecting plate, and one side, away from the connecting plate, of each locating rod extends to the inner cavity of each locating hole.

Preferably, the threaded rod is in threaded connection with a nut, the rear side of the nut is in contact with the disc, and the rear side of the disc is in contact with the connecting plate.

Preferably, the elongated slot has been seted up to the opposite one side of sleeve pipe, the bottom fixedly connected with first connecting block of montant near elongated slot one side, the one end that the montant was kept away from to first connecting block runs through the elongated slot and has the connecting rod through pivot swing joint, the one end that the first fixed block was kept away from to the connecting rod has the second connecting block through pivot swing joint, the one end and the pump body fixed connection of connecting rod are kept away from to the second connecting block.

Preferably, the bottom fixedly connected with shock pad of the pump body, the bottom and the bottom plate fixed connection of shock pad, the shock pad is made by the rubber material.

A use method of a centrifugal pump with a pump cover convenient to replace comprises the following steps:

a: liquid enters through the left end of the water inlet pipe, the liquid is filtered through the filter frame, impurities are prevented from entering an inner cavity of the pump body, when the filter frame is disassembled, the movable rod is moved to drive the clamping rod to vertically move, the clamping rod compresses the first spring, the clamping rod is far away from the inner cavity of the clamping groove, the filter frame is moved leftwards, and then the filter frame can be disassembled;

b: when the pump cover and the blades are disassembled, the bolts are disassembled through a disassembling tool, the bolts are connected with the threaded holes through the bolts and the threaded holes in a threaded mode to enable the bolts to move forwards and to be away from the first fixing block, the pump cover is separated from the pump body, the nuts are disassembled through the disassembling tool, the nuts move forwards and are separated from the threaded rods, and then the disc is disassembled, so that the blades are disassembled;

c: can produce vibrations during centrifugal pump operation, the pump body can drive inlet tube and outlet pipe vibrations, inlet tube and outlet pipe drive the montant vibrations, montant compression second spring, absorb and weaken the power that the montant received through the second spring, thereby slow down the vibration range of montant, carry out shock attenuation protection to the montant, thereby carry out shock attenuation protection to the pump body, the pump body vibrations still can drive and connect the vibrations of second connecting block, the second connecting block drives the connecting rod vibrations, the connecting rod drives first connecting block vibrations, first connecting block drives the montant vibrations, also can be absorbed by first spring, the shock pad carries out shock attenuation protection to the bottom of the pump body.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, through the cooperation of the pump body, the first fixing block, the threaded hole, the water inlet pipe, the water outlet pipe, the pump cover, the second fixing block, the bolt, the rotating rod, the connecting plate, the threaded rod, the disc, the nut, the blade, the filter frame, the ring, the clamping groove, the first spring, the clamping rod, the long hole, the moving rod, the fixing sleeve, the vertical rod, the sleeve and the second spring, the pump cover and the impeller have the advantages of being convenient to disassemble and filter impurities in liquid, and the problems that most of existing centrifugal pump covers are fixedly welded and cannot be disassembled are solved, so that the impeller in the centrifugal pump cannot be disassembled, the maintenance cost is increased, the impurities in the conveying liquid cannot be filtered, the impurities enter the interior of the centrifugal pump, the blockage of the centrifugal pump is easily caused, and the use of people is.

2. According to the invention, the belt pulley is arranged, the connection with an external motor transmission shaft through a belt is facilitated, the centrifugal pump is fixedly installed conveniently by arranging the installation hole, the disc can be positioned by arranging the positioning hole and the positioning rod, the installation of the disc is facilitated, the phenomenon that the connecting plate slips with the disc in the rotating process is avoided, the disc can be fixedly installed by arranging the nut and the threaded rod, the disc is convenient to disassemble, the two sides of the pump body can be buffered and supported by arranging the elongated slot, the first connecting block, the connecting rod and the second connecting block, so that the pump body is subjected to shock absorption protection, the bottom of the pump body can be supported by arranging the shock absorption pad, the bottom of the pump body is subjected to shock absorption protection, and the liquid entering the inner cavity of the pump body can be filtered by arranging the filter frame.

Drawings

FIG. 1 is a schematic cross-sectional view of the structure of the present invention;

FIG. 2 is a schematic front view of the structure of the present invention;

FIG. 3 is an enlarged view of a portion of A in FIG. 1 according to the present invention;

FIG. 4 is a schematic top view of the structure of the present invention;

fig. 5 is a schematic top view of a threaded rod and nut connection of the present invention.

In the figure: the vibration damper comprises a pump body 1, a first fixing block 2, a threaded hole 3, a water inlet pipe 4, a water outlet pipe 5, a pump cover 6, a second fixing block 7, a bolt 8, a rotating rod 9, a connecting plate 10, a threaded rod 11, a disc 12, a nut 13, a blade 14, a filter frame 15, a ring 16, a clamping groove 17, a groove 18, a first spring 19, a clamping rod 20, a long hole 21, a moving rod 22, a fixing sleeve 23, a vertical rod 24, a sleeve 25, a second spring 26, a bottom plate 27, a belt plate 28, a mounting hole 29, a long groove 30, a first connecting block 31, a connecting rod 32, a second connecting block 33 and a damping pad 34.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The pump body 1, the first fixing block 2, the threaded hole 3, the water inlet pipe 4, the water outlet pipe 5, the pump cover 6, the second fixing block 7, the bolt 8, the rotating rod 9, the connecting plate 10, the threaded rod 11, the disc 12, the nut 13, the blade 14, the filter frame 15, the ring 16, the clamping groove 17, the groove 18, the first spring 19, the clamping rod 20, the long hole 21, the moving rod 22, the fixing sleeve 23, the vertical rod 24, the sleeve 25, the second spring 26, the bottom plate 27, the belt disc 28, the mounting hole 29, the long groove 30, the first connecting block 31, the connecting rod 32, the second connecting block 33 and the shock pad 34 are all universal standard parts or parts known by a person skilled in the art, and the structure and principle of the pump body are known by the technical manual or by a conventional experimental method.

Referring to fig. 1-5, a centrifugal pump convenient for replacing a pump cover comprises a pump body 1, a first fixed block 2 is fixedly connected to the surface of the pump body 1 in the circumferential direction, a threaded hole 3 is formed in the surface of the first fixed block 2, a water inlet pipe 4 is communicated with the left side of the pump body 1, a water outlet pipe 5 is communicated with the right side of the pump body 1, a pump cover 6 is arranged at the front side of the pump body 1, a second fixed block 7 is fixedly connected to the surface of the pump cover 6 in the circumferential direction, a bolt 8 is arranged at the front side of the second fixed block 7 in a penetrating manner, the rear end of the bolt 8 sequentially penetrates through the second fixed block 7 and the threaded hole 3 and extends to the outside of the threaded hole 3, the bolt 8 is in threaded connection with the threaded hole 3, a rotating rod 9 is arranged at the rear side of the pump body 1 in a penetrating manner, the front end of the, the screw thread sleeve on the surface of the threaded rod 11 and positioned on the front side of the disc 12 is provided with a nut 13, the front side of the disc 12 is fixedly connected with a blade 14, the inner cavity of the water inlet pipe 4 is provided with a filter frame 15, the liquid entering the inner cavity of the pump body 1 can be filtered by arranging the filter frame 15, the surface of the filter frame 15 is fixedly sleeved with a ring 16, the top and the bottom of the ring 16 are both provided with clamping grooves 17, the top and the bottom of the inner cavity of the water inlet pipe 4 are both provided with grooves 18, the inner wall of the groove 18 is fixedly connected with a first spring 19, one end of the first spring 19 far away from the inner wall of the groove 18 is fixedly connected with a clamping rod 20, one end of the clamping rod 20 far away from the first spring 19 extends to the inner cavity of the clamping grooves 17, the top and the bottom on the left side of the inner wall of the water inlet pipe 4 are both provided with a long hole 21, the equal fixed cover in surface of inlet tube 4 and outlet pipe 5 is equipped with fixed cover 23, and the bottom fixedly connected with montant 24 of fixed cover 23, the bottom cover of montant 24 are equipped with sleeve pipe 25, the bottom fixedly connected with second spring 26 of montant 24, the bottom of second spring 26 and the bottom fixed connection of sleeve pipe 25 inner chamber, the bottom fixedly connected with bottom plate 27 of sleeve pipe 25.

The rear end fixedly connected with belt pulley 28 of bull stick 9, mounting hole 29 has been seted up at the top of bottom plate 27, and the quantity of mounting hole 29 is four, and bull stick 9 passes through sealed bearing and pump body 1 swing joint, through setting up belt pulley 28, conveniently is connected with outside motor transmission shaft through the belt, through seting up mounting hole 29, is convenient for carry out fixed mounting to the centrifugal pump.

Locating hole has all been seted up to the both sides at disc 12 top, the equal fixedly connected with locating lever in both sides of connecting plate 10 bottom, and one side that connecting plate 10 was kept away from to the locating lever extends to the inner chamber of locating hole, through setting up locating hole and locating lever, can fix a position disc 12, and the phenomenon of skidding appears with disc 12 in rotatory in-process to connecting plate 10 simultaneously is avoided in the installation of the disc 12 of being convenient for.

Threaded rod 11 and nut 13 threaded connection, the rear side and the disc 12 contact of nut 13, and the rear side and the connecting plate 10 contact of disc 12 through setting up nut 13 and threaded rod 11, can carry out fixed mounting to disc 12, the disc 12's of being convenient for dismantlement simultaneously.

The elongated slot 30 has been seted up to the relative one side of sleeve pipe 25, the bottom fixedly connected with first connecting block 31 of montant 24 near elongated slot 30 one side, the one end that the montant 24 was kept away from to first connecting block 31 runs through elongated slot 30 and has a connecting rod 32 through pivot swing joint, the one end that first fixed block 2 was kept away from to connecting rod 32 has a second connecting block 33 through pivot swing joint, the one end and the pump body 1 fixed connection of connecting rod 32 are kept away from to second connecting block 33, through setting up elongated slot 30, first connecting block 31, connecting rod 32 and second connecting block 33, can cushion the support to the both sides of the pump body 1, thereby carry out shock attenuation protection to the pump body.

The bottom fixedly connected with shock pad 34 of the pump body 1, the bottom and the bottom plate 27 fixed connection of shock pad 34, shock pad 34 are made by the rubber material, through setting up shock pad 34, can support the bottom of the pump body 1, carry out shock attenuation protection to the bottom of the pump body 1.

The pump body 1, the first fixing block 2, the threaded hole 3, the water inlet pipe 4, the water outlet pipe 5, the pump cover 6, the second fixing block 7, the bolt 8, the rotating rod 9, the connecting plate 10, the threaded rod 11, the disc 12, the nut 13, the blades 14, the filter frame 15, the ring 16, the clamping groove 17, the groove 18, the first spring 19, the clamping rod 20, the long hole 21, the moving rod 22, the fixing sleeve 23, the vertical rod 24, the sleeve 25 and the second spring 26 are matched, so that the pump cover 6 and the impeller are convenient to disassemble, impurities in liquid are filtered, the problems that the existing pump cover 6 is mostly fixedly welded and the pump cover 6 cannot be disassembled, the impeller in the centrifugal pump cannot be disassembled, maintenance cost is increased, the impurities in the conveying liquid cannot be filtered, the impurities enter the centrifugal pump and easily cause blockage of the centrifugal pump are solved, is inconvenient for people to use.

a: liquid enters through the left end of the water inlet pipe 4, the liquid is filtered through the filter frame 15, impurities are prevented from entering an inner cavity of the pump body 1, when the filter frame 15 is disassembled, the movable rod 22 is moved to drive the clamping rod 20 to vertically move, the clamping rod 20 compresses the first spring 19, the clamping rod 20 is far away from the inner cavity of the clamping groove 17, the filter frame 15 is moved leftwards, and then the filter frame 15 can be disassembled;

b: when the pump cover 6 and the blades 14 are disassembled, the bolts 8 are disassembled through a disassembling tool, the bolts 8 are connected with the threaded holes 3 through threads, the bolts 8 move forwards to be far away from the first fixing block 2, the pump cover 6 is separated from the pump body 1, the nuts 13 are disassembled through the disassembling tool, the nuts 13 move forwards to be separated from the threaded rods 11, and then the circular discs 12 are disassembled, so that the blades 14 are disassembled;

c: can produce vibrations during the centrifugal pump operation, the pump body 1 can drive inlet tube 4 and outlet pipe 5 vibrations, inlet tube 4 and outlet pipe 5 drive montant 24 vibrations, montant 24 compression second spring 26, absorb and weaken the power that montant 24 received through second spring 26, thereby slow down montant 24's vibration amplitude, carry out shock attenuation protection to montant 24, thereby carry out shock attenuation protection to the pump body 1, 1 vibrations of the pump body still can drive and connect the vibrations of second connecting block 33, second connecting block 33 drives connecting rod 32 vibrations, connecting rod 32 drives the vibrations of first connecting block 31, first connecting block 31 drives the vibrations of montant 24, also can be absorbed by first spring 19, shock pad 34 carries out shock attenuation protection to the bottom of the pump body 1.

In summary, the following steps: this centrifugal pump and application method of conveniently changing pump cover, through the pump body 1, first fixed block 2, screw hole 3, inlet tube 4, outlet pipe 5, pump cover 6, second fixed block 7, bolt 8, bull stick 9, connecting plate 10, threaded rod 11, disc 12, nut 13, blade 14, filter frame 15, ring 16, draw-in groove 17, recess 18, first spring 19, kelly 20, slot hole 21, carriage release lever 22, fixed cover 23, montant 24, sleeve pipe 25 and second spring 26 cooperate, the fixed welding has mostly been solved current centrifugal pump cover, can not dismantle the pump cover, thereby can not dismantle the inside impeller of centrifugal pump cover, and the cost of maintenance has been increased, can not filter the impurity in the transport liquid, make impurity get into the inside of centrifugal pump, cause the jam of centrifugal pump easily, the problem of not being convenient for people to use.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a conveniently change centrifugal pump of pump cover, includes the pump body (1), its characterized in that: the pump is characterized in that a first fixed block (2) is fixedly connected to the surface of the pump body (1) in the circumferential direction, a threaded hole (3) is formed in the surface of the first fixed block (2), a water inlet pipe (4) is communicated with the left side of the pump body (1), a water outlet pipe (5) is communicated with the right side of the pump body (1), a pump cover (6) is arranged on the front side of the pump body (1), a second fixed block (7) is fixedly connected to the surface of the pump cover (6) in the circumferential direction, a bolt (8) is arranged on the front side of the second fixed block (7) in a penetrating mode, the rear end of the bolt (8) sequentially penetrates through the second fixed block (7) and the threaded hole (3) and extends to the outside of the threaded hole (3), the bolt (8) is in threaded connection with the threaded hole (3), a rotating rod (9) is arranged on the rear side of the pump body (1) in a penetrating mode, the water inlet pipe is characterized in that a threaded rod (11) is fixedly connected to the front side of the connecting plate (10), a disc (12) is sleeved on the surface of the threaded rod (11), a nut (13) is sleeved on the threaded rod (11) and located on the front side of the disc (12), blades (14) are fixedly connected to the front side of the disc (12), a filter frame (15) is arranged in an inner cavity of the water inlet pipe (4), a ring (16) is sleeved on the surface of the filter frame (15), clamping grooves (17) are formed in the top and the bottom of the ring (16), grooves (18) are formed in the top and the bottom of an inner cavity of the water inlet pipe (4), first springs (19) are fixedly connected to the inner wall of the grooves (18), clamping rods (20) are fixedly connected to one ends, far away from the inner walls of the grooves (18), of the clamping rods (20), and one ends, far away from the first springs (19), extend to the inner cavity, slot hole (21) have all been seted up to the left top of inlet tube (4) inner wall and bottom, slot hole (21) and recess (18) intercommunication, the left side fixedly connected with carriage release lever (22) of kelly (20), the left end of carriage release lever (22) runs through slot hole (21) and extends to the left side of slot hole (21), the equal fixed cover in surface of inlet tube (4) and outlet pipe (5) is equipped with fixed cover (23), the bottom fixedly connected with montant (24) of fixed cover (23), the bottom cover of montant (24) is equipped with sleeve pipe (25), the bottom fixedly connected with second spring (26) of montant (24), the bottom of second spring (26) and the bottom fixed connection of sleeve pipe (25) inner chamber, the bottom fixedly connected with bottom plate (27) of sleeve pipe (25).

2. A centrifugal pump with a pump cover convenient to replace according to claim 1, characterized in that: the rear end fixedly connected with belt pulley (28) of bull stick (9), mounting hole (29) have been seted up at the top of bottom plate (27), the quantity of mounting hole (29) is four, bull stick (9) are through sealed bearing and pump body (1) swing joint.

3. A centrifugal pump with a pump cover convenient to replace according to claim 1, characterized in that: locating holes are formed in the two sides of the top of the disc (12), locating rods are fixedly connected to the two sides of the bottom of the connecting plate (10), and one side, away from the connecting plate (10), of each locating rod extends to the inner cavity of each locating hole.

4. A centrifugal pump with a pump cover convenient to replace according to claim 1, characterized in that: the threaded rod (11) is in threaded connection with the nut (13), the rear side of the nut (13) is in contact with the disc (12), and the rear side of the disc (12) is in contact with the connecting plate (10).

5. A centrifugal pump with a pump cover convenient to replace according to claim 1, characterized in that: elongated slot (30) have been seted up to the relative one side of sleeve pipe (25), montant (24) are close to the first connecting block (31) of bottom fixedly connected with of elongated slot (30) one side, the one end that montant (24) were kept away from in first connecting block (31) runs through elongated slot (30) and has connecting rod (32) through pivot swing joint, the one end that first fixed block (2) were kept away from in connecting rod (32) has second connecting block (33) through pivot swing joint, the one end and the pump body (1) fixed connection of connecting rod (32) are kept away from in second connecting block (33).

6. A centrifugal pump with a pump cover convenient to replace according to claim 1, characterized in that: the bottom fixedly connected with shock pad (34) of the pump body (1), the bottom and bottom plate (27) fixed connection of shock pad (34), shock pad (34) are made by the rubber material.

7. The use method of the centrifugal pump with the pump cover convenient to replace according to claim 1, characterized by comprising the following steps:

a: liquid enters through the left end of the water inlet pipe (4), the liquid is filtered through the filter frame (15), impurities are prevented from entering an inner cavity of the pump body (1), when the filter frame (15) is disassembled, the movable rod (22) is moved to drive the clamping rod (20) to vertically move, the clamping rod (20) compresses the first spring (19), the clamping rod (20) is far away from the inner cavity of the clamping groove (17), the filter frame (15) is moved leftwards, and the filter frame (15) can be disassembled;

b: when the pump cover (6) and the blades (14) are disassembled, the bolts (8) are disassembled through a disassembling tool, the bolts (8) are connected with the threaded holes (3) in a threaded mode to enable the bolts (8) to move forwards and be away from the first fixing block (2), the pump cover (6) is separated from the pump body (1), the nuts (13) are disassembled through the disassembling tool to enable the nuts (13) to move forwards and be separated from the threaded rods (11), then the disc (12) is disassembled, and therefore the blades (14) are disassembled;

c: the centrifugal pump can generate vibration when in operation, the pump body (1) can drive the water inlet pipe (4) and the water outlet pipe (5) to vibrate, the water inlet pipe (4) and the water outlet pipe (5) drive the vertical rod (24) to vibrate, the vertical rod (24) compresses the second spring (26), the second spring (26) absorbs and weakens the force on the vertical rod (24) so as to slow down the vibration amplitude of the vertical rod (24), carry out shock attenuation protection to montant (24), thereby carry out shock attenuation protection to the pump body (1), the pump body (1) vibrations still can drive and connect second connecting block (33) vibrations, second connecting block (33) drive connecting rod (32) vibrations, connecting rod (32) drive first connecting block (31) vibrations, first connecting block (31) drive montant (24) vibrations, also can be absorbed by first spring (19), shock pad (34) carry out shock attenuation protection to the bottom of the pump body (1).